OPERATING MANUAL TRANSMISSION TEST SET 806A / 806AR

Transcription

1 OPERATING MANUAL TRANSMISSION TEST SET 806A / 806AR (C) Copyright 2011 CONVEX CORPORATION

2 Charge battery at least once a week BRDG REV SND SND/2W SND PC/232 CONTROL REMOD 60 Hz REJECT 500 khz MIN TO GND W TONE db dbm dbrn msec LOW F (HDSL) E (ISDN) D (DATA) MID ZERO HIGH TONE LOSS TIMER khz SKIP BATT LOW CHG POWER F4/40k F3/ CONVEX 806A TIMS VOL A! B LEVEL 200 khz 15 khz FILTER S/N NOISE 3.4 khz C MSG FILTER SWEEP START/STOP QUIET dbm SEND TLP SET SWEEP VAR FREQ F2/1004 F1/404 C D BRDG REV SND SND/2W A! B SND MIN db dbm dbrn msec LOW MID HIGH TONE LOSS CONVEX 806AR TIMS khz PC/232 CONTROL REMOD LEVEL 60 Hz REJECT 500 khz 200 khz 15 khz FILTER F (HDSL) TO GND E (ISDN) W TONE D (DATA) S/N 3.4 khz NOISE C MSG FILTER ZERO QUIET SWEEP dbm START/STOP SEND TIMER TLP SET F4/40k F3/2804 SKIP SWEEP F2/1004 VAR FREQ F1/404 VOL 1 POWER 0 OPERATING MANUAL TRANSMISSION TEST SET 806A / 806AR (C) Copyright 2011 CONVEX CORPORATION Issue Date October

3 Model 806A / 806AR CONTENTS SECTION 1 GENERAL PAGE 1-1 INTRODUCTION MANUAL OVERVIEW A UREMENT GROUP DEFINITIONS 1-4 LEVEL dbm LOSS ATTENUATION DISTORTION GAIN SLOPE Hz OFFSET NOISE dbrn NOISE with TONE S/N NOISE to GROUND TLP dbm BRIDGE FILTERS C MSG FILTER D FILTER khz FLAT FILTER E FILTER DSL F FILTER HDSL khz FILTER khz FILTER khz FILTER Hz REJECT FILTER FREQUENCY REMOD FORWARD REFERENCE RETURN REFERENCE LOCAL STRAIGHTAWAY IMPULSE NOISE IMPULSE THRESHOLD COUNTING INTERVALS IMPULSE NOISE with TONE TONE LOSS TONE HIGH IMPULSE NOISE to GROUND P/AR RETURN LOSS HYBRID ERL SRLL SRLH ECD SPECIFICATIONS 806A / 806AR Level Frequency Filters Noise, Noise w Tone S/N Ratio Noise to Ground Level Impulse Noise SECTION 1 SPECIFICATIONS PAGE Transient Timer Extended Round Trip Delay Envelope Delay Generator Input / Output Ports Monitor Dial Temperature PC Control Power Dimensions / Weight,Portable Dimsions / Weight, Rack Mount SECTION 2 INSTALLATION 2-1 INTRODUCTION RECEIVING INSPECTION RECEIVING OPERATIONAL CHECK OPERATIONAL CHECK FAILURE BATTERY OPERATION - Portable LOW BATTERY SHUTDOWN I/O CONNECTIONS - Portable PC CONTROL - Portable Unit PADDED FIELD CASE MOUNTING - Rack Mount Unit POWER - Rack Mount Unit I/O CONNECTIONS - Rack Mount I/O JACKS - Rack Mount Unit COMPUTER HOOKUP - Rack Mount MODEM HOOKUP - Rack Mount SUPPORT WARRANTY PRODUCT REPAIR SERVICE INTRODUCTION - PC OPERATION SOFTWARE INSTALLATION SOFTWARE COMMAND LINE OPTIONS USB TO SERIAL ADAPTER SOFTWARE INSTALLATION TEST SOFTWARE TROUBLE SHOOTING MAXIMUM RATINGS SECTION 2 ILLUSTRATIONS FRONT PANEL - PORTABLE FRONT PANEL - RACK MOUNT...2-2/2-3 SIDE PANEL - PORTABLE FIELD CASE Fig A - PC CABLE Fig A - MODEM CABLE Fig 2-3 PC SCREEN - LEVEL Fig 2-4 PC SCREEN - COMM FAILURE SECTION 3 FRONT PANEL OPERATION 3-1 INTRODUCTION PANEL OPERATION AUTO-TEST DEMONSTRATION BATTERY INDICATOR LOW BATTERY SHUTDOWN I/O CONNECTIONS - PORTABLE I/O CONNECTIONS - RACK MOUNT RECEIVE BRIDGE / TERM LINE HOLD I/O REVERSE I/O IMPEDANCE C -1

4 Model 806A / 806AR CONTENTS SECTION 3 FRONT PANEL OPERATION PAGE 3-10 / SND SELECTION UNITS SELECTION UREMENTS SWITCH LEVEL FILTER Switch NOISE Switch NOISE FILTER Switch START/STOP - GENERATOR SWEEP ZERO - IMPULSE COUNT SEND LEVEL (dbm) SETUP QUIET Send Mode TLP/THL SETUP IMPULSE NOISE THRESHOLD SETUP IMPULSE NOISE TIMER SETUP IMPULSE NOISE COUNT RATE SETUP SEND FREQUENCY SETUP.- SND SEND FREQUENCY SETUP SWEEP.led SKIP.(SF SKIP) FUNCTION / FREQUENCY KEYS CHANGING A FREQUENCY KEY SENDING / PRINTING A REPORT DISPLAYING AUTO-TEST RESULTS POWER-UP DEFAULTS LEVEL MODE AUTO-TEST DEFAULTS VF AUTO-TEST DEFAULTS DSL AUTO-TEST DEFAULTS HDSL AUTO-TEST DEFAULTS RUNNING AUTO-TEST - SENDING RUNNING AUTO-TEST - RECEIVING LED TEST (LAMP TEST) SECTION 3 ILLUSTRATIONS PANEL NOMENCLATURE, PORTABLE PANEL NOMENCLATURE, RACK MOUNT...3-2/3-3 UNITS SELECTION TABLE POWER-UP DEFAULTS TABLE DEFAULTS TABLE, AUTO-TEST SECTION 4 PC OPERATION 4-1 INTRODUCTION - PC OPERATION A HOOK-UP 806A / PC B MODEM HOOK-UP C START-UP D CURSOR OPERATION E AUTO-TEST DEMONSTRATION BATTERY CHECK LOW BATTERY SHUTDOWN I/O CONNECTIONS - PORTABLE I/O CONNECTIONS - RACK MOUNT RECEIVE BRIDGE / TERM LINE HOLD I/O REVERSE I/O IMPEDANCE / SND SELECTION UNITS SELECTION LEVEL UREMENT SELECTION A LEVEL B LEVEL FILTER SELECTION NOISE - UREMENT NOISE FILTER SELECTION C-2 SECTION 4 PC OPERATION PAGE 4-16 START/STOP - GENERATOR SWEEP ZERO - IMPULSE COUNT SEND LEVEL (dbm) SETUP QUIET Send Mode TLP/THL SETUP IMPULSE NOISE THRESHOLD SETUP IMPULSE NOISE TIMER SETUP IMPULSE NOISE COUNT RATE SETUP SEND FREQUENCY SETUP SND / SEND FREQUENCY SETUP SWEEP CONTROL / INDICATORS SKIP.(SF SKIP) FUNCTION / FREQUENCY KEYS CHANGING A FREQUENCY KEY PRINTING A REPORT OR GRAPH DISPLAYING AUTO-TEST RESULTS POWER-UP DEFAULTS LEVEL MODE AUTO-TEST DEFAULTS VF AUTO-TEST DEFAULTS DSL AUTO-TEST DEFAULTS HDSL AUTO-TEST DEFAULTS RUNNING AUTO-TEST - SENDING RUNNING AUTO-TEST - RECEIVING COMMUNICATION PARAMETERS COMMUNICATIONS PROTOCOLS SECTION 4 ILLUSTRATIONS Figure 4-1A 806A - PC CABLE Figure 4-1B 806A - MODEM CABLE Figure 4-1C COMM. SETUP Screen Figure 4-1C1. SELECTION Screen Figure 4-1C2 LEVEL/FREQUENCY Screen Figure 4-1E VF AUTO-TEST Report Figure 4-2 BATTERY CHECK Screen Figure 4-6 BRIDGE / TERM Selector Figure 4-8 NORMAL / REV. Selector Figure 4-11 UNITS SELECTION Screen Figure 4-12 UREMENTS MENU Figure 4-12A LEVEL/FREQUENCY Screen Figure 4-12A1 HDSL AUTO-TEST Report Figure 4-12B, STRAIGHTAWAY Figure 4-12B1 VF AUTO-TEST REPORT Figure 4-13 LEVEL FILTER Figure 4-14 NOISE w TONE - S/N Figure 4-14A NOISE to GROUND Screen Figure 4-18 GENERATOR QUIET Screen Figure 4-20 Screen Figure 4-21 TLP SELECTION Screen Figure 4-22 IMPULSE NOISE THRESHOLD Figure 4-25 GENERATOR FREQUENCY Figure 4-29 FUNCTION / FREQ. KEYS Figure 4-31 VF LEVEL AUTO-TEST REPORT.4-10 POWER-UP DEFAULTS TABLE DEFAULTS TABLE, AUTO-TEST Figure 4-39 VF AUTO-TEST Report Figure 4-39A ATTN DIST GRAPH Screen COMMUNICATION PARAMETERS Table

5 Model 806A / 806AR GENERAL Section BRDG SND REV SND/2W SND PC/232 CONTROL REMOD 60 Hz REJECT 500 khz MIN TO GND W TONE db dbm dbrn msec LOW F (HDSL) E (ISDN) D (DATA) MID ZERO HIGH TONE LOSS TIMER khz SKIP BATT LOW CHG POWER F4/40k F3/ CONVEX 806A TIMS VOL A! B LEVEL 200 khz 15 khz FILTER S/N NOISE 3.4 khz C MSG FILTER SWEEP START/STOP QUIET dbm SEND TLP SET SWEEP VAR FREQ F2/1004 F1/404 C D 1-1 INTRODUCTION The Convex Model 806A (or 806AR) TIMS (Transmission Impairment Measuring Set) measures analog transmission parameters of communications facilities. It has signal generation and measurement capability to support a wide range of services including: Telephone Service, DATA, Program, DDS, DSL (ISDN basic rate) and HDSL. It measures: LEVEL,, FREQUENCY, NOISE, NOISE with TONE, S/N RATIO, NOISE to GROUND, IMPULSE NOISE, IMPULSE NOISE with TONE, and IMPULSE NOISE to GROUND per IEEE Standard The 806A is easy to operate from the front panel (or from a personal computer) and it has AUTO-TEST capability for VF, DSL and HDSL facilities. Front panel controls are simple and utilize large bright LED displays and indicators. The 806A also comes with control software that runs under DOS or a DOS Window. The PC communicates with the test set through an RS-232 Port located on the rear or side of the test set. The PC can be connected directly, or it can be remoted via modems. A RACK MOUNTED version, 806AR, is available for permanent installations. The PORTABLE, 806A, includes a rechargeable battery that powers the set for more than 8 hours. The 806A recharges in 8 hours and can be operated while recharging. The 806A is accurate, rugged and economical. 1-2 MANUAL OVERVIEW Section 1 includes: a brief description of the 806A/AR TIMS, a discussion of measurements, definitions, and the technical specifications for the 806A / 806AR. Section 2 has three parts. The first part covers installation, I/O connections, Power, Battery and operational tests. The second part discusses Support, Warranty, and Repair Service. The third part handles the issues related to PC control such as software installation, cable hookup and operational tests. Section 3 describes how to operate the 806A from the Front Panel. Section 4 describes how to operate the 806A from software running on a PC A UREMENT GROUP The 806A is outfitted with those measurements that are useful for qualifying, maintaining, and trouble-shooting facilities for services spanning POTS to HDSL. All measurements (LEVEL,, FREQUENCY, NOISE and IMPULSE NOISE) that apply universally for VF through HDSL (wideband) transmission are included. Further, all measurements comply with IEEE Standard LEVEL Level is the power inferred by the amplitude of a sinewave voltage across a standard resistive termination. Power is expressed in dbm (db relative to one milliwatt) and the measuring set provides standard receive terminations of 100, 135, 600, or 900 Ohms. An average detector is the standard means to measure the effective value of the sinewave. An rms detector is appropriate for non-sinusoidal waveforms such as noise. High-pass and Low-pass Filters provide a means of rejecting out-of-band noise as a potential source of measurement error. 1-5 dbm (db relative to one milliwatt) dbm = 10LOG 10 (V 2 /R) where V is the effective voltage and R is the termination resistance in kohms (600 ohms = 0.6 kohms). 1-6 LOSS Loss is the db difference in power measured at a facilities output compared to power available to the input. (The "power available to the input" is the power available to a standard termination matched to the test set send impedance.) + db loss implies input power is greater than output power. To facilitate comparison, loss is measured at standard reference frequencies Hz is a standard reference frequency in North America. 1-7 ATTENUATION DISTORTION Attenuation distortion (frequency response) is the loss in db measured at various frequencies (with constant power available to the input) compared to the standard reference frequency. + db implies more loss than at the reference frequency. 1-1

6 Model 806A / 806AR GENERAL Section db A BRDG SND REV SND/2W! B SND MIN dbm dbrn msec LOW MID HIGH TONE LOSS CONVEX 806AR TIMS khz 1-8 GAIN SLOPE Gain slope refers to attenuation distortion measured at 404, 1004, and 2804 Hz. The 404 Gain Slope is the db difference between 404 and 1004 Hz. The 2804 Gain Slope is the db difference between 2804 and 1004 Hz Hz OFFSET A 4 Hz offset avoids measurement errors associated with PCM (Pulse Code Modulation) when transmission frequencies are small integral submultiples of the 8 khz sampling rate NOISE Noise is the power inferred by the voltage across a standard resistive termination when weighted by a standard filter. Noise is expressed in dbrn (db relative to one picowatt) and the measuring set provides a standard receive termination of 100, 135, 600, or 900 Ohms. An rms detector is used to measure the effective voltage dbrn (db relative to one picowatt) ( dbrn = dbm + 90 ) dbrn = 10LOG 10 (V 2 /R) +90 where V is the effective voltage and R is the termination resistance in kohms (600 ohms = 0.6 kohms) NOISE with TONE Noise with Tone is noise measured by sending a nominal 1004 Hz "holding" tone which simulates transmission traffic. The measuring set deploys a notch filter that eliminates the holding tone prior to measuring the noise S/N (SIGNAL to NOISE RATIO) The S/N ratio measurement (S/TD, Signal to Total Distortion) is the db ratio of the power of a nominal 1004 "holding" tone to power with the holding tone removed with a notch filter. "Total Distortion" in place of "Noise" emphasizes that the notch filter passes both "additive" and "correlated" noise. Correlated noise includes signal: harmonics, quantizing noise, phase jitter and amplitude jitter NOISE to GROUND (Note that facilities ground can be substantially different from the AC Mains safety ground!) Noise to Ground measures ("longitudinal") noise that is common to both conductors of a 2 wire pair with respect to facilities ground. It is measured using a 100 kohm resistive termination and, by convention, is referred to a 600 Ohm reference (dbrn 600 or dbm 600 ). Excessive longitudinal noise will show up as metallic noise. Nominal levels of longitudinal noise appears as "metallic" (differential) noise when there is inadequate balance TLP Transmission Level Point TLP is the design gain in db at a particular point in the facilities compared to a reference point (0 TLP). When asserted, the test set TLP feature offsets level readings so that power is referred to a 0 TLP. An actual level of dbm at a +13 db TLP infers 1.0 dbm at a 0 TLP. This is referred to as 1.0 dbm0 (db relative to one milliwatt, referred to a 0 TLP). The TLP feature is also used to refer Noise to a 0 TLP dbm0 dbm0 = db relative to one milliwatt, referred to a 0 TLP BRIDGE The receive of the measuring set is put into bridge mode to measure voltage across an "external" termination such as the input of a line card. In bridge mode, receive impedance must be set to match the external termination in order for the measuring set to apply the proper impedance factor FILTERS Filters are an integral part of Noise or Impulse Noise Measurements and play an important roll in Level and Delay Measurements. Filters used for Noise or Impulse Noise have specific spectral weightings that pass only that energy which falls in the transmission band of interest for a particular service. Filters used for Level or Delay are designed to reject noise that is outside of the measurement band of interest for a particular service C MSG FILTER (C Message) - VOICE The C Filter is used to weight Noise or Impulse Noise as it relates to voice telephone service. C weighting corresponds to listener perceived annoyance when using a 500-type telephone set D FILTER - VF DATA / FAX The D Filter, also known as the "CCITT O.41 Channel Bank Filter", weights Noise or Impulse Noise as it relates to VF data or fax transmission. The 3 db bandwidth extends from 300 Hz to 3,400 Hz so as to approximate the transmission spectrum of a 28.8 / V.34 Modem khz FILTER - VF DATA / FAX The 3.4 khz Flat Filter superseded the 3 khz Flat Filter and weights Noise or Impulse Noise as it relates to VF data or fax transmission. The 3.4 khz Flat Filter passes frequencies below 300 Hz so as to be useful in detecting low frequency interference such as 20, 60 and 120 Hz. 1-2

7 Model 806A / 806AR GENERAL Section 1 PC/232 CONTROL REMOD LEVEL 60 Hz REJECT 500 khz 200 khz TO GND W TONE S/N F (HDSL) E (ISDN) D (DATA) 3.4 khz ZERO QUIET TIMER 15 khz NOISE C MSG SWEEP dbm TLP FILTER FILTER START/STOP SEND SET SKIP SWEEP VAR FREQ F4/40k F3/2804 F2/1004 F1/404 VOL 1 POWER E FILTER - DSL (IDSN Basic Rate), DDS (Digital Data System) The E Filter is used to measure Level, Noise or Impulse Noise on 2 or 4 Wire circuits used for DSL or DDS Transmission. The 3 db bandwidth extends from 1 khz to 50 khz and approximates filters used in DSL Terminators DSL (Digital Subscriber Line) DSL is synonymous with ISDN Basic Rate. It uses "2B1Q" (2 Binary 1 Quaternary) line code and has a bi-directional transfer rate of 160 kb/s on a 2 wire pair. 144 kb/s is available to the user (2B1D, two 64 kb/s, one 16 kb/s channel). The pair is terminated by a LT (Line Termination) at the central office and an NT1 (Network Termination) at the user's location F FILTER - HDSL The F Filter is used to measure Level, Noise or Impulse Noise on 2 Wire circuits used for HDSL Transmission. The 3 db bandwidth extends from 5 khz to 245 khz and approximates filters used in HDSL (HTU) Terminal Units HDSL (High Bit Rate Digital Subscriber Line) HDSL has a bi-directional transfer rate of 784 kb/s on a 2 wire pair. 768 kb/s is available to the user (12B, twelve 64 kb/s channels). The pair is terminated by an HTU-C (HDSL Terminal Unit) at the central office and an HTU-R at the user's (remote) location. Two HDSL loops provide Mb/s (T1 / DS1) transmission khz FILTER - VF LEVEL, / PROGRAM NOISE The 15 khz Flat Filter is used for Level, Loss, Attenuation Distortion, and EDD on VF Facilities. It is also used to weight noise as it relates to program quality audio. taken out when using the 15 khz, 200 khz, or 500 khz Flat Filters. (The 60 Hz REJECT Filter introduces delay at low frequencies and should not be deployed when measuring below 4 khz.) 1-30 FREQUENCY Frequency is the number of cycles of a periodic waveform per second (EDD - Envelope Delay Distortion) Delay or EDD makes no statement as to actual input to output transmission time delay. Delay is the difference in transmission time of various frequencies compared to that of a (zero) reference frequency. It is common to select the reference (typically 1804 Hz) close to the frequency of minimum delay. Delay is measured by detecting change in phase of the 83 1/3 Hz envelope of the received test signal as frequency is varied. The reference for the phase detector is an 83 1/3 Hz oscillator which, for 4 wire measurements, is sent to the far end of the circuit under test. At the far end, a REMOD (remodulation) unit extracts the 83 1/3 Hz and returns it to the measuring set REMOD (Remodulation) For 4 wire delay measurements, remodulation (performed at the far end of the circuit) returns the 83 1/3 Hz reference to the measuring set FORWARD REFERENCE - Forward reference applies to 4 wire delay measurement where the measuring set forwards the 83 1/3 Hz to the REMOD unit on a constant frequency carrier. The REMOD unit outputs a modulated variable frequency carrier which is used to measure EDD of the channel going toward the measuring set khz FILTER - DSL, DDS, PROGRAM - LEVEL / The 200 khz Flat Filter is used to measure Level, Loss, Attenuation Distortion, and EDD of DSL, DDS or Program Facilities khz FILTER - HDSL LEVEL / The 500 khz Flat Filter is used to measure Level, Loss, Attenuation Distortion, and EDD of HDSL Facilities Hz REJECT (HUM REJECTION) FILTER The 60 Hz REJECT (high-pass) Filter is used to reject low frequency interference such as 20 Hz ringing, 60 Hz mains, and 120 Hz rectified mains noise when performing LEVEL measurements. It can be asserted or RETURN REFERENCE - Return reference applies to 4 wire delay measurement where the REMOD unit returns the 83 1/3 Hz to the measuring set on a constant frequency carrier. The measuring set outputs a modulated variable frequency carrier which is used to measure EDD of the channel going away from the measuring set LOCAL Local delay mode is used in 4 wire situations where it is desirable to connect the measuring set to both ends of the circuit (or line card) under test. "Local" delay mode is also used when measuring round trip EDD of a 4 wire circuit by deploying a far end loop-back.

8 Model 806A / 806AR GENERAL Section STRAIGHTAWAY. Expanded use of 2 Wire data transmission (FAX, Modem, ISDN DSL, and HDSL) has increased the need for a 2 Wire, STRAIGHTAWAY EDD Measurement. (The Convex 806A introduced a patended, EDD which handles VF, DSL, and HDSL bands, measures on a 2 wire basis, is comparable to, and compatible with the Standard 4 Wire EDD Measurement.) Straightaway Delay is measured in a manner similar to attenuation distortion - there is a signal generation unit on the send end and a measuring unit on the receive end. In Straightaway Delay, EDD and attenuation distortion are measured simultaneously. This technique eliminates the need to take an additional circuit out of service for a reference return IMPULSE NOISE Impulse Noise is voltage transients which have peaks that are more than 12 db above the steady state noise for a given weighting filter and resistive termination. Impulse Noise is measured by counting the number of peaks that exceed a setable threshold (or thresholds) during a counting interval. A maximum count rate (8 or 100 events per second) is imposed to avoid registering multiple counts due to ringing associated with an individual event IMPULSE THRESHOLD Impulse threshold voltage is stated in dbrn and calibrated to equal the peaks of a sinewave with steady state power that is 3 db lower. e.g. The peaks of a 90 dbrn (0 dbm) sinewave correspond to a 93 dbrn threshold COUNTING INTERVALS Impulse Counting Intervals can be set in 1 Minute increments. However, for ease of comparison, intervals of 5 and 15 minutes are commonly used IMPULSE NOISE with TONE Impulse Noise with Tone is noise measured by sending a nominal 1004 Hz "holding" tone to simulate transmission traffic. The measuring set deploys a notch filter that eliminates the holding tone prior to detecting the impulse voltage. Impulse Noise with Tone counting is inhibited during a "tone loss" or "tone high" condition. 600 Ohm reference (dbrn600). High longitudinal transients show up as metallic events. Moderate longitudinal transients appears as metallic events when there is inadequate balance P/AR Peak / Average Ratio measures the simultaneous effects of envelope delay distortion, attenuation distortion, and low return loss on VF data transmission. A P/AR of 100 signifies no distortion. The P/AR generator sends a signal which consists of 16 frequencies between 141 and 3891 Hz with precise amplitude and phase characteristic. The P/AR receiver processes the signal and provides the measurement RETURN LOSS Return Loss is the db ratio of reflected power to transmitted power. It is a measure of the impedance of the circuit under test compared to a reference impedance. RL = 20log 10 [(Z cir +Z ref )/(Z cir - Z ref )] Return Loss can be measured on a 2 Wire or 4 Wire Basis. When measuring on a 2 Wire basis, the 806C provides a precision internal hybrid which can be set for a reference impedance of 600 or 900 Ohms HYBRID A hybrid is a device for converting 2 Wire transmission to 4 Wire transmission and vice versa ERL Echo Return Loss is measured with a mid band spectrum with frequencies in the range of 300 to 3000 Hz SRLL Singing Return Loss Low is measured with a low frequency spectrum ranging from 120 to 1000 Hz SRLH Singing Return Loss High is measured with a high frequency spectrum ranging from 1500 to 4000 Hz ECD Echo Canceler Disable tone sequence is used to deactivate echo cancelers so that the intrinsic circuit return loss can be measured TONE LOSS Tone Loss occurs when the received holding tone drops below -40 dbm TONE HIGH "Tone high" occurs when the received holding tone is greater than + 10 dbm or when harmonic content of the holding tone is sufficient to exceed the asserted impulse threshold IMPULSE NOISE to GROUND ( to GND) (Note that facilities ground can be substantially different from the AC Mains safety ground!) Impulse Noise to Ground measures (longitudinal) transients that are common to both conductors of a 2 wire pair with respect to facilities ground. It is measured using a 100 kohm resistive termination and, by convention, referred to a 1-4

9 Model 806A / 806AR GENERAL Section 1 SPECIFICATIONS 806A TIMS / 806AR TIMS LEVEL Dynamic Range Freq. Range Resolution Detector Accuracy +24 dbm -40 dbm -80 dbm -80 to +24 dbm 15 khz, 200 khz-600/ to +24 dbm 200 khz, 500 khz -20 to +20 db TLP offset 20 Hz to 300 khz 0.1 db Average or RMS, Selectable 20Hz 200Hz 15kHz 200kHz 300kHz 1002 to 1022 Hz / 0 to -19 dbm: ±0.1 db Filters Hum Reject, IN/OUT High Pass, -60 db at 60 Hz 15 khz Flat, VF Low Pass, -3 db at 15 khz 200 khz, Wide Band Low Pass, -3 db at 200 khz 500 khz, Extra WB Low Pass, -3 db at 500 khz FREQUENCY Count Range Level Range Resolution Accuracy ±0.5 db ±0.2 db ±0.5 db ±1 db ±0.5 db ±0.5 db ±1.0 db ±2 db 20 Hz to 300 khz -50 to +24 dbm - 15 khz Bandwidth -40 to +24 dbm khz Bandwidth -30 to +24 dbm khz Bandwidth 1 Hz to 30 khz, 10 Hz to 300 khz ±1 Hz to 30 khz, ±10 Hz to 300 khz NOISE, NOISE w TONE Dynamic Range 10 to 114 dbrn or -80 to +24 dbm for C MSG, 3.4 khz, D, E, 15 khz Filters 20 to 114 dbrn or -70 to +24 dbm for 200 khz, F, 500 khz Filters Holding Tone -40 to +10 dbm / 995 to 1025 Hz Resolution 0.1 db Detector RMS Accuracy ±1 db S/N RATIO (S/TD RATIO, signal to total distortion) Dynamic Range 10 to 50 db (excludes E and F Filters) Holding Tone -40 to +10 dbm / 995 to 1025 Hz Resolution 0.1 db Accuracy ±1 db NOISE to GROUND (Power Influence) Dynamic Range 30 to 140 dbrn, or -60 to +50 dbm 40 to 140 dbrn, -50 to +50 dbm: F/500 khz Resolution 0.1 db Accuracy ±1 db 3-LEVEL IMPULSE NOISE, IMPULSE NOISE w TONE Dynamic Range 30 to 115 dbrn - C, D, 3.4, 15 khz Filters 40 to 115 dbrn khz, E, F Filters 50 to 115 dbrn khz Filter Impulse w Tone excludes E and F Filters Thresholds 3 /LOW, MID (+4 db), HI (+8 db) Accuracy ± 1 db Count Capacity 32,000 Count Rate 8, 100 Counts/Second Holding Tone -40 to +10 dbm / 1002 to 1022 Hz Loss of TONE Measurement halted, auto resume TRANSIENT TIMER Timer Set 1 Minute Steps up to 8 Hours Resolution 1 Second Accuracy ± 1 Second EXTENDED ROUND TRIP Dynamic Ranges 0 to 1,000,000 usec, 0 to 3,000,000 usec Resolution 1 usec Accuracy ±5 usec ENVELOPE Dynamic Range to usec Frequency Range 200 Hz to 300 khz Level -40 to +20 dbm SEND Level -40 to +7 dbm Modulation 50% AM, 83 1/3 Hz Resolution 1 usec Accuracy ±10 usec Operating Modes 2W Straightaway - Patented 22 tone, Local, Forward / Return Reference Remodulation Forward / Return Reference GENERATOR Dynamic Range -41 to +10 dbm Resolution 0.1 db Steps Accuracy ±0.1 db -19 to 0 dbm, ±0.2 db at 1 khz Flatness ±0.2 db to 15 khz, ±1 db to 300 khz Freq. Range 20 to 300 khz Resolution 1 Hz - to 4 khz, 10 Hz - to 30 khz, 100 Hz - to 300 khz Accuracy ±1 Hz to 10 khz, ±30 Hz to 300 khz, TH Distortion -50 db at 1004 Hz, -40 db: 20 Hz khz Quick Freq's 4 Programmable Frequency Keys Auto Sweep:VF, DSL, HDSL / 500 khz INPUT / OUTPUT PORTS Quantity 2 Measure / Dial Ports - Portable: A/C, B/D Rack Mount: A, B Ports on front and rear Operation 2 Wire, 4 Wire Impedance 100, 135, 600, 900 Ohms Independent / SEND Selection Return Loss 135, 600, 900: 30 db / 100: 15 db Receive Bridge Less than 0.2 db Loss Hold Dual, 23 ma Nominal GENERAL MONITOR TEMP PC CONTROL POWER PORTABLE WEIGHT RACK MOUNT WEIGHT Speaker with Volume Control Parallel Bantam Jacks for Dial / Talk - 806A Operate +0 to +50 C / Store -40 to +71 C Serial Port: RS-232 / 9 pin D Connector, 115 VAC +/-10%, Option: 100 or 230 VAC 806A Battery Run: 8 Hrs. / Recharge: 8 Hrs. 9.0 x 11.0 x 3.5 Inches 229 x 279 x 89 mm 9.0 lbs. / 4.1 kg. including Battery 7.5 x 19.0 x 1.7 Inches 191 x 483 x 43 mm 5.0 lbs. / 2.3 kg. 1-5

10 Model 806A / 806AR GENERAL Section BRDG SND REV SND/2W SND PC/232 CONTROL REMOD 60 Hz REJECT 500 khz MIN TO GND W TONE db dbm dbrn msec LOW F (HDSL) E (ISDN) D (DATA) MID ZERO HIGH TONE LOSS TIMER khz SKIP BATT LOW CHG POWER F4/40k F3/ CONVEX 806A TIMS VOL A! B LEVEL 200 khz 15 khz FILTER S/N NOISE 3.4 khz C MSG FILTER SWEEP START/STOP QUIET dbm SEND TLP SET SWEEP VAR FREQ F2/1004 F1/404 C D 2-1 INTRODUCTION This section is organized into five parts dealing with: Receiving Inspection, Installation - Portable Unit, Installation - Rack Mount Unit, Support and Service, and Installation - PC Control Software. Receiving Inspection consists of a visual examination and brief operational check to verify that the 806A has not been damaged in transit. Installation - Portable Unit discusses battery operation / recharge, I/O connections and the field case. Installation - Rack Mount Unit discuses mounting, I/O hook-up, and power. Support and Service includes factory assistance with applications, operation, repairs, or recalibration. Installation - PC Control Software discusses software installation, RS232 cable hook-up, direct connection, modem connection and start-up. 2-2 RECEIVING INSPECTION Prior to shipment each 806A is tested electrically and inspected for good mechanical condition. New units should be free of mechanical defects and new (or repaired) units should be in good operating order. Inspect the equipment on receipt to insure that it has not been damaged in transit. If damage is observed, retain the shipping carton and its contents and file a claim with the freight carrier. 2-3 RECEIVING OPERATIONAL CHECK (For portable units, connect the power cord to the connector.) Plug the power cord into an AC mains receptacle and turn on the power switch located on the far right. (For portable units, connect alligator ends of the test leads together to form a bantam to bantam cable.) Insert a bantam to bantam cable into the front panel A and B Jacks thereby connecting the receive () to the send (SND) port. Verify that the left display reads 0.0 dbm +/- 0.2 db and that the right display reads khz +/- 1 Hz. Rotate the VOL knob and verify that the audio monitor is adjustable from quiet to loud. 2-4 OPERATIONAL CHECK FAILURE If the operational check fails contact the factory for assistance. The operational check depends on the following start-up defaults: and SND Impedance set to 600 Ohms, measuring LEVEL, generator ON and set for 0.0 dbm / 1004 Hz. Note the status of startup defaults. 2-1 Startup defaults can be changed by setting the desired parameters, then simultaneously pressing and holding the F2 and F4 Function Keys on the far right of the panel. 2-5 BATTERY OPERATION - PORTABLE UNIT The 806A operates for more than 8 hours on a fully charged battery. Although charge rate is reduced, the instrument can be operated while recharging. Charging can proceed at any time that is convenient, but charge the battery at least once a week. The BATT indicator LED advises as follows: LED ON: OPERATING ON BATTERY / CHARGE GOOD QUICK BLINK: OPERATING ON BATTERY/ CHARGE LOW SLOW BLINK: OPERATING ON AC / CHARGING BATTERY LED OFF: OPERATING ON AC / BATTERY CHARGED 30 minutes of operating time remain from the onset of the CHARGE LOW indication. Extended operation on low charge will ultimately trigger low battery shutdown to prevent degraded operation or battery damage. 2-6 LOW BATTERY SHUTDOWN Low battery shutdown occurs when the 806A is operated on "low" battery beyond 30 minutes, or if the battery was disconnected or replaced. When shutdown occurs the front panel goes dark even though the power switch is on. Connect the power cord to the AC mains to start charging or to operate the 806A. The BATT indicator has a slow, 1 second, blink while charging and turns off when the battery is charged. 2-7 I/O CONNECTIONS - PORTABLE UNIT Bantam Jacks located on the lower left corner of the panel provide connections for measurement signals. A is the NORMAL receive port and B is the NORMAL send port. C is wired in parallel with A and provides a means to connect a butt set to dial/talk on the A pair. D is wired in parallel with B and provides a means to connect a butt set to dial/talk on the B pair. The receive pair is put into bridge (BRDG) to release line hold (on-hook), the send pair is put into to release line hold to permit pulse dialing.

11 Model 806A / 806AR GENERAL Section db A BRDG SND REV SND/2W! B SND MIN dbm dbrn msec LOW MID HIGH TONE LOSS CONVEX 806AR TIMS khz 2-8 PC/CONTROL - PORTABLE UNIT. The PC/REMOTE CONTROL Port can be permanently connected. The front panel controls of 806A operate when the port is not active. The port is an RS-232, serial data port located on the side of the unit. It has DCE "polarity" and is directly cabled to a PC serial (DTE) port with a 9 pin, Male to Female Cable. 2-9 PADDED FIELD CASE The padded field case protects exterior surfaces of the instrument from being scratched or dented due to impacts with other hard objects. The 806A can be operated from within the field case by lifting the top lid of the field case to expose the front panel. The field case has an accessory compartment for manuals and test leads. It is designed so that the computer cable and power cord can be left attached to the 806A and tucked into a side compartment when not in use. When needed, the computer cable or power cord can be quickly accessed while leaving the 806A in the field case MOUNTING - RACK MOUNT UNIT The 806AR mounts in 1U vertical space (1.75 inches) of a 19 inch rack or cabinet. It is attached to the cabinet using four machine screws (not furnished ) through holes in either end of the front panel. Since the 806AR is less than 8 inches deep, check the access to the rear panel terminal block prior to mounting. If access is limited, make the necessary electrical connections to the rear panel prior to mounting. Rear panel electrical connections consist of the following: 1. AC mains power Power Cord attached 2. Measurement signals, 2 Pair - T/R Terminals 3. PC Control / RS232 cable 9 Pin D Connector 2-11 POWER - RACK MOUNT UNIT The power cord for the 806AR is permanently attached to the rear panel. It plugs into a mains receptacle. A separate, external power line fuse is not required. The 806AR has an internal (0.25 amp) power line fuse. Typical ac current draw is less than 0.1 amp. The power switch is located on the far right side of the front panel I/O CONNECTIONS - RACK MOUNT UNIT Measurement signal pairs for the 806AR are normally wired to a computer controlled Metallic Test Access Unit (MTAU) or a manual test panel. Connect measurement signal wires to the terminal block located on the rear. The receive pair is wired to the A T/R contacts on the front panel. The send pair is wired to the B T/R contacts I/O JACKS - RACK MOUNT UNIT Bantam Jacks located on the front panel are wired in parallel (A to A, B to B) with the rear terminal block. They provide alternate ports for temporarily connecting measurement signals to the 806AR (when the rear connections are open.) The jacks also provide a means to connect a butt set to dial/talk on the A or B pair. The receive (A) pair is put into bridge (BRDG) to release line hold (on-hook), the send (B) pair is put into to release line hold to permit pulse dialing COMPUTER HOOKUP - RACK MOUNT UNIT The PC/REMOTE CONTROL Port can be permanently connected. The front panel controls of 806AR operate when the port is not active. The port is an RS-232, serial data port located on the rear panel of the 806AR. It has DCE "polarity" and is directly cabled to a PC serial (DTE) port with a 9 pin, Male to Female Cable. 2-2

12 Model 806A / 806AR GENERAL Section 2 PC/232 CONTROL REMOD LEVEL 60 Hz REJECT 500 khz 200 khz TO GND W TONE S/N F (HDSL) E (ISDN) D (DATA) 3.4 khz ZERO QUIET TIMER 15 khz NOISE C MSG SWEEP dbm TLP FILTER FILTER START/STOP SEND SET SKIP SWEEP VAR FREQ F4/40k F3/2804 F2/1004 F1/404 VOL 1 POWER 0 9 Pin D 9 Pin D MALE FEMALE 1 - DCD RD TD DTR A/AR SG PC 6 - DSR RTS CTS RI - 9 Figure A - PC CABLE Communications parameters are discussed below under Software Command Line Options - Section MODEM HOOKUP - RACK MOUNT UNIT The PC/REMOTE CONTROL Port can be permanently connected. (The front panel controls of 806AR operate when the port is not active.) This is an RS232, serial data port located on the rear panel of the 806AR. Having DCE "polarity" it requires a "Null Terminal" / 9 to 25 pin conversion to interface with the modem. 9 Pin D 25 Pin D MALE MALE 1 - DCD open DCD RD TD TD RD DTR DSR AR SG SG MODEM 6 - DSR DTR RTS CTS CTS RTS RI open RI -22 Figure A - MODEM CABLE 2-16 SUPPORT We invite your comments, questions or technical support requirements. On the Internet: Turner_J@convexcorp.com Tel: / Fax: If repair work is required, ship the product to the factory: CONVEX CORPORATION 1319 Shepard Drive Sterling, VA USA (Check for current information.) Include a note: Trouble description Your name / phone number Return shipping address 2-17 WARRANTY All Convex products are warranted to be free of manufacturing defects for a period of one year from the date of shipment. At its option, Convex will either repair or replace products which prove to be defective during the warranty period, provided they have not been subject to misuse, accident, or unauthorized alterations and are returned to the factory with transportation prepaid. Convex will promptly return the repaired product, transportation prepaid within the USA. No other warranties are expressed or implied. Convex Corporation is not liable for consequential damages PRODUCT REPAIR SERVICE Post warranty repair service is available for Convex products. Where there is no observable mechanical damage, the Model 806A or 806AR will be repaired and/or recalibrated for a fixed fee. Otherwise, Convex will advise as to the nature and cost of repair and, subject to customer instructions, will promptly repair and return the product. Return the 806A or 806AR to the factory annually for recalibration INTRODUCTION - PC OPERATION A PC can be used to control the 806A or 806AR instead of using the front panel controls. There are four main advantages to PC Control. First, PC control permits more parameters to be displayed simultaneously. Second, an 806A can be remote controlled via dial-up modems. Third, data measured using auto-test features can be saved as computer files for subsequent recall into reports - saving time compared to manually recording results. Fourth, a printer can be attached to the PC to provide immediate reports or graphs SOFTWARE INSTALLATION Software installation is required in order for the 806A to be controlled by a PC. Control Software furnished with the 806A runs under DOS or a DOS Window on an IBM Compatible PC. 2-3

13 Model 806A / 806AR GENERAL Section 2 DOS (non-windows) INSTALLATION: 1. Create a folder on your hard disk named 806A. 2. Copy TIMS.EXE, SELECTP.EXE and BDRV.PDT from the disk or CD into the 806A folder. 3. Run SELECTP and choose a printer. 4. Run TIMS.EXE to control the 806A. SETTING UP TO PRINT GRAPHICS (all installations): If you plan to print the sweep graphics available from the TIMS Software, you must run the Printer Select (SELECTP.EXE) program in order to pick the printer you'll be using. If you later change printers run the Printer Select program again and slect a new printer. If your printer is not on the list, check your printer documentation to see if it will emulate one on the list. WINDOWS INSTALLATION: 1. Create a folder on your hard disk named 806A. 2. Copy TIMS.EXE and TIMS.ICO from the media into the 806A folder. 3. Create a shortcut to TIMS.exe on the desktop 4. On the desktop, right click the shortcut and select properties. 5. Use the properties to select TIMS.ICO as the icon. 6. Use the properties to set Full Screen and High Idle Sensitivity. High idle sensitivity eliminates loss of data coming in the serial port due to Windows servicing background activities. Windows can still have other applications open in the background while TIMS is running SOFTWARE COMMAND LINE OPTIONS Command line options permit bypassing the communications and measurement screens to go directly to a particular measurement. The command line is of the form "TIMS.EXE w x y" where w x and y are separated by spaces. With w and x specifying communications selections and y specifying a measurement selection as follows: w selects the Comm Port - w = 1, 2, 3, or 4 x selects the Baud Rate - x = 1200, 2400, 4800, 9600, or y selects the measurement: 0 = LEV/FREQ, 1 = NOISE, 4 = TRANS 10 = BATT CHECK, 11 = Example: C:\806A\TIMS.EXE selects: Comm Port 1, Baud Rate, and LEV/FREQ Measurement is the most common command line option setting for direct PC to test set connections USB to Serial Adapter / Windows XP USB to serial adapters have been used sucessfilly. Configure the USB serial adapter for com1 or com2 by digging into the driver and changing the setup. Windows XP Example: 1. Open: Control Panel --> Performance and Maintenance --> System 2. From the System dialog box select the Hardware tab and then the Device Manager button. 3. From the Device Manager list expand Ports. Then right click on the USB Serial Port and select Properties. 4. From the Properties dialog box select the Port Settings tab and then the Advanced button. 5. From the Advanced dialog box, re-assign the com port. Other operating systems may require a different path to get to the driver setup SOFTWARE INSTALLATION TEST 1. Connect a 9 pin cable (ref 2-15) between serial com1 port on the PC and the RS-232 DCE Port on the 806A. Plug the power cord into an AC mains receptacle and turn on the power switch located on the far right. Insert a bantam to bantam cable into the front panel A and B Jacks thereby connecting the receive () to the send (SND) port. Verify that the left display reads 0.0 dbm +/- 0.2 db and that the right display reads khz +/- 1 Hz. Rotate the VOL knob and verify that the audio monitor is adjustable. 2. From a DOS Prompt, run the following command line: TIMS.EXE ( Reference Section 2-21 ) 3. Verify that the LEVEL UREMENT PC SCREEN, shown below, appears. Receive Level and Frequency is displayed on the 5th line from the bottom. Verify that this line reads: A 0.0 dbm (+/- 0.2 db) and khz +/- 1 Hz. LEV/FREQ :09 15 khz [ ] A dbm 600 TERM khz NORM 4W SND B dbm 600 TERM khz SWEEP k CONT DATA MENU Figure 2-3 PC SCREEN-LEVEL UREMENT Operation of the 806A from the PC is covered in Section 4 of the Manual. Use the Esc Key to back up through menus and to exit the program. 2-4

14 Model 806A / 806AR GENERAL Section SOFTWARE TROUBLE SHOOTING If step 3 above fails, then check the following: 1. Did the TIMS Program run? If so the screen should start with a black background with large white characters "System Initialization in progress". If not recheck Section 2-20 SOFTWARE INSTALLATION. 2. The TIMS Program ran but failed to communicate with the TIMS (Test Set). In this case, the following screen appears: v SN:0 UNABLE TO COMMUNICATE WITH TEST SET MENU Figure 2-4 PC SCREEN - COMM. FAILURE Recheck the cable connections and that the 806A is powered ON. Power the test set OFF then back ON to reset the on-board processor then rerun the TIMS Program. Use the Esc Key to back up through menus and to exit the program MAXIMUM RATINGS (Bantam Jacks) Maximum differential (tip to ring) voltage: 30 V Maximum voltage applied to tip or ring relative to the ground terminal of the AC Power Connector or chassis metal: 250 V PC / Remote Control RS-232 Port (DB9) Maximum Voltage applied to any pin relative to pin 5 (signal ground): +/- 25 V 2-5

15 Model 806A / 806AR FRONT PANEL OPERATION Section 3 LEVEL DISPLAY UNITS INDICATORS UNITS SWITCH IMPULSE INDICATORS FREQUENCY DISPLAY BATTERY STATUS INDICATOR CONTOL CURSOR POWER SWITCH IMPEDANCE INDICATORS IMPEDANCE SWITCH RECEIVE / SEND DISPLAY SWITCH A/B REVERSE BRIDGE / TERM RECEIVE JACK SEND JACK A JACK B JACK 250V MAX A C BRDG REV SND SND/2W! B D PC/232 CONTROL REMOD LEVEL SND 60 Hz REJECT 500 khz 200 khz 15 khz FILTER MIN TO GND W TONE S/N NOISE db dbm dbrn msec LOW MID HIGH F(245 khz) ZERO E (50 khz) D (DATA) 3.4 khz C MSG SWEEP FILTER START/STOP TONE LOSS QUIET dbm SEND TIMER TLP SET BATT LOW CHG POWER khz F4/2713 F3/2804 SKIP SWEEP F2/1004 VAR FREQ F1/ CONVEX 806A TIMS VOL LEVEL / SWITCH NOISE / IMPULSE SWITCH GENERATOR LEVEL CONTROL AUDIO VOLUME LEVEL / FILTER SWITCH NOISE / IMPULSE FILTER SWITCH GENERATOR SWEEP / IMPULSE TIMER CONTROL TLP / IMPULSE CONTROL RECEIVE SWEEP INDICATOR FUNCTION / FREQUENCY KEYS GENERATOR FREQUENCY CONT 3-1 INTRODUCTION FRONT PANEL OPERATION This section describes operation of the 806A using the front panel switches and indicators. Topic titles and numbering has been arranged to correspond to the comparable topics in Section 4 (PC OPERATION) for ease of comparison. Operation using the front panel controls is usually more convenient for making quick checks. Front panel controls definitely get the job done if it isn't convenient to use of a Personal Computer. (Operation using a PC has some advantages including saving test results as data files.) Note: Front panel switches are not operable while the unit is being remotely controlled by a PC. The PC/232 CONTROL led on the front panel is lit when the PC has control. In general, briefly pressing and releasing the switch at the base of a column of led indicators will increment the lit led to the next allowed state. Some functions are only activated by pressing and holding the switch for about one second (4 WIRE RETURN LOSS, 60 Hz REJECT,, SKIP and some function key operations). Portable and rack mounted versions operate the same except that the rack unit does not have the battery status indicator. Refer to the drawings in this section for panel nomenclature. AUTO-TEST DEMONSTRATION Although the 806A has lots of capability and flexibility, the auto-test feature makes it a breeze to operate. This process automatically measures (and stores) LOSS, ATTENUATION DISTORTION, EDD and background NOISE. 1. Power ON and connect the B / SEND Jack to the A / RECEIVE Jack. 2. Set measurement to and press the Sweep START/STOP Control. That's all it takes - test results are available in about 2.5 minutes. Observe the Frequency Display and note that the SWEEP led is blinking. 3. After the SWEEP led stops blinking, press and hold the F3 + F4 Keys simultaneously until the panel leds are blinking. 4. Use the UP/DOWN Cursor to scroll through the frequency points on the right display. The associated data is shown on the left display. Use the UNITS Switch to toggle between dbm and msec. 3-2 BATTERY INDICATOR (Portable units only) The battery status indicator led, located near the power switch, provides the following indications to let the user know the condition of the battery: LED ON: OPERATING ON BATTERY / CHARGE GOOD QUICK BLINK: OPERATING ON BATTERY/ CHARGE LOW SLOW BLINK: OPERATING ON AC / CHARGING BATTERY LED OFF: OPERATING ON AC / BATTERY CHARGED A "Fully Charged" indication occurs when the battery voltage reaches about 6.9 volts. The 806A can be left connected to the AC mains with no adverse effects. Although the charge rate is reduced, the instrument can be operated while recharging. Further, charging can proceed at any time that is convenient. 30 minutes of operating time remain from the onset of the CHARGE LOW indication. Extended operation on low charge will ultimately trigger low battery shutdown to prevent degraded operation and battery damage. 3-3 LOW BATTERY SHUTDOWN Low battery shutdown occurs when the 806A is operated on "low" battery beyond 30 minutes, or if the battery was disconnected or replaced. When shutdown occurs the front panel goes dark even though the power switch is on. Connect the power cord to the AC mains to start charging or to operate the 806A. The BATT indicator has a slow, 1 second, blink while charging and turns off when the battery is charged. 3-1

16 Model 806A / 806AR FRONT PANEL OPERATION Section 3 A/B REVERSE BRIDGE / TERM IMPEDANCE INDICATORS LEVEL DISPLAY UNITS INDICATORS FREQUENCY DISPLAY 900 db A BRDG REV SND SND/2W! 250V MAX B SND MIN dbm dbrn msec LOW MID HIGH TONE LOSS CONVEX 806AR TIMS khz IMPEDANCE SWITCH RECEIVE / SEND DISPLAY SWITCH UNITS SWITCH IMPULSE INDICATORS LEVEL / SWITC LEVEL / FILTER 3-4 I/O CONNECTIONS - PORTABLE UNIT Bantam Jacks located on the lower left corner of the panel provide connections for measurement signals. A is the NORMAL receive jack and B is the NORMAL send jack. C is wired in parallel with A and provides a means to connect a butt set to dial/talk on the A pair. D is wired in parallel with B and provides a means to connect to the B pair. Line hold is automatic. The receive pair is put into bridge (BRDG) to release hold. The send pair is put into to release hold. 3-5 I/O CONNECTIONS - RACK MOUNT UNIT Measurement signal pairs for the 806AR are normally wired to a computer controlled Metallic Test Access Unit (MTAU) or a manual test panel. Connect the measurement signal wires to the terminal block located on the rear. The receive pair is wired to the A T/R (Tip/Ring) contacts. The send pair is wired to the B T/R contacts. 3-6 RECEIVE BRIDGE / TERM Put the 806A into bridge mode to measure across an "external" termination such as the input of a line card. The BRIDGE / TERM Switch toggles the receiver between the selected termination impedance (100, 135, 600 or 900 ohms) and high impedance bridging. The BRDG led is lit in bridge mode and off when the receiver is terminated. In bridge mode, set the receive impedance to match the external termination in order for the measuring set to apply the proper impedance factor. 3-7 LINE HOLD Receive line hold is enabled when the line is terminated. The receive line is put into bridge (BRDG) to release line hold (BRDG led is lit). (Note: The send pair is put into Mode to release line hold.) Go to BRDG Mode to (dial) establish a circuit, then switch BRDG - OFF to hold and terminate the circuit while testing. 3-8 I/O REVERSE Use the I/O Reverse when testing a dial line in both directions to facilitate send / receive change-over while maintaining line hold. The REV led is lit in REVERSE mode and off in NORMAL mode. The A/B REVERSE Switch toggles between NORMAL and REVERSE modes where: NORMAL: Receive on A Jack - Send on B Jack REVERSE: Receive on B Jack - Send on A Jack 3-9 I/O IMPEDANCE Use 600 (or 900) Ohms for voice frequency data or POTS. Use 100 (or 135) Ohms for ISDN, HDSL or other wideband services. Note: The 806A automatically sets the SEND and Impedances to default values when sending or receiving an auto-test tone sequence. Factory defaults are 600 Ohms for VF, 135 Ohms for ISDN / DSL, and 100 Ohms for HDSL tone sequences. When the led is lit the IMPEDANCE INDICATORS display the current receive impedance. When the SND led is lit the IMPEDANCE INDICATORS display the current SEND impedance. Use the IMPEDANCE Switch to set impedance. Be aware that impedance selection performs two functions: 1. The selected terminator is switched. 2. The corresponding impedance factor is applied / SND SELECTION The RECEIVE / SEND DISPLAY Switch toggles the LEVEL and FREQUENCY DISPLAYS between showing current receive measurement results, and showing the settings of the generator. and SND leds indicate the current state. This state also determines the mode of the IMPEDANCE INDICATORS and IMPEDANCE Switch (described in 3-9). Light the led to measure Level or Noise. Light the SND led to set or monitor the generator UNITS SELECTION The function of the UNITS Switch (located between the displays) is dependent on the measurement mode: MODE DISPLAY SELECTIONS LEVEL/REMOD LEFT dbm ON - TLP = 0.0 db dbm blinks - TLP Asserted LEFT dbm, msec NOISE LEFT dbrn, dbm IMPULSE RIGHT LOW, MID, HIGH In LEVEL (or REMOD) Mode, use the Units Switch to refer the Receive Level reading to a non-zero Transmission Level Point - dbm led blinks. 3-2