VTE-1. Voting Tone Encoder. Manual Revision: Covers Loader Firmware Revisions: 1.70 & Higher

Transcription

1 VTE- Voting Tone Encoder Manual Revision: 0-0- Covers Loader Firmware Revisions:.0 & Higher Covers Application Firmware Revisions:.0 & Higher Covers PCB Revisions: F

2 TABLE OF CONTENTS Specifications General Information Hardware Installation Hardware Alignment Jumper Settings Controls & Indicators Operation Theory of Operation Technical Notes 0 Contact Information 0

3 SPECIFICATIONS Voltage/Current: Operating Voltage: Operating Current (standby): LED Current: Fuse Protection Auto Resettable with surge suppression: RX Input from Radio: Frequency Range: Notch Filter Depth: Dynamic Range COR Input Dedicated Phone Line: Output Level Output Impedance Fuse Protection Auto Resettable with surge suppression: Mechanical: Dimensions: Operating Temp: - VDC ma ma 00 ma Hz db relative to KHz 0 db Logic Low -0 to 0 db pot adjustable 00 Ohm 00 ma." H x W x." L 0 to 0 C Default Pilot Tone Frequencies: 0 Hz (default) Hz 00 Hz 00 Hz No Tone (for auxiliary receivers)

4 GENERAL INFORMATION Midian Electronics VTE-, voting tone encoder (also known as a pilot tone generator or status tone generator) with a 00-ohm line driver, pairs with a radio receiver to create an analog satellite voting receiver or auxiliary receiver. Satellite voting receivers are spread out over a geographic area to provide greater radio coverage and are connected via a dedicated line, telemetry link or microwave to a voting comparator. The voting comparator looks at the signal to noise ratio from multiple voting receivers and passes the best quality signal to the dispatcher/repeater. The VTE- looks at the COR coming from the receiver. When COR is inactive the VTE- generates a voting tone to the voting comparator. This tone is selectable as 0 Hz, Hz, 00 Hz or 00 Hz. Custom tones can also be ordered from Midian. When the receiver s COR is active the tone is no longer generated and the audio from the radio is sent to the voting comparator. Midian s VTE- is compatible with the following types of voting systems: Motorola Spectra-TAC JPS Communications (Raytheon) SNV- GE Mastr II RF Technologies Eclipse Other systems using 0 Hz, Hz, 00 Hz or 00 Hz as the voting tone.

5 HARDWARE INSTALLATION Be certain to follow standard anti-static procedures when handling any of Midian s products. Getting Started: The VTE- has a number of adjustment potentiometers and configuration jumpers. These have been adjusted and configured at the factory for a typical installation. However, audio levels should be verified and adjusted (if necessary) at the time of installation. Also, the configuration jumpers should be inspected prior to installation to verify that they are in the right configuration. Jumper descriptions appear in the jumper settings section with a quick reference table. Line Interface The line interface connector CON is a 0-pin RJ- style connector on the left side of the back panel. Diagram. -Wire Operation: For a -wire installation, simply connect pins and (red and green) to the dedicated line. A standard conductor phone cable will function properly in connector CON. See table.. Table. Pin Color -Wire CON- Black Not Used CON- Red Line CON- Green Line CON- Yellow Not Used Radio Interface: CON is located in the middle of the back panel and is used to connect the VTE- to the satellite or auxiliary receiver. The following are the connection points: CON: CON- (Orange): COR: Connect this lead to the busy detect of the radio. This input is used to control whether audio should be passed down the line to the voting comparator or generate the pilot tone. CON- (Red): Battery (- VDC): Connect this lead to - VDC from the base station/repeater. CON- (Black): Ground: Connect this lead to the base station s or repeater s ground. CON- (White): RX Input: Connect to the receive audio in the satellite or auxiliary receiver after the sub-audible hi-pass filter and at some point that gives flat audio to the VTE-. Speaker audio is fine if it is single ended, but make certain the volume control cannot be turned down accidentally.

6 HARDWARE ALIGNMENT The alignments are preset at the factory and should not need to be adjusted during installation. However, if an adjustment is needed please follow the procedures below. RX Input Line Level Adjustment:. With voice being received from the base station adjust RP while monitoring TP with an oscilloscope, so that TP shows around 00 mv p-p. Also verify that JP Pin shows around 0 mv p-p. RX Output Line Level Adjustment:. With voice being received from the base station adjust RP while monitoring the line out with a line level meter and set for approximately -0 db on average voice or - db on peak voice. Pilot Tone Level Adjustment:. Prior to performing this step, the line level adjustments above must be done. Set RP to the desired db level (-0 to 0 db). Setting the COR Input of the VTE- to the inactive state (logic high) will cause the unit to generate the Pilot Tone. Note: If a line level meter is not available for the level adjustment use an AC voltmeter with a DB scale. A voltmeter would not be set up for balanced 00 ohm audio, but it will provide a close measurement.

7 JUMPER SETTINGS The following table shows the default jumper settings and their function: Jumper Number Default Position Description JP - In - Out De-Emphasis jumper JP - In Termination jumper JP0 - In Termination jumper JP - Out Hz Pilot Tone Select JP - In 0 Hz Pilot Tone Select JP - Out 00 Hz Pilot Tone Select JP - Out 00 Hz Pilot Tone Select JP-JP All Out No Pilot Tone

8 CONTROLS & INDICATORS Power LED: This red LED indicates that power is applied to the unit through the rear connector. COR/MON LED: This red LED indicates carrier is detected from the receiver. Tone LED: This red LED indicates the Pilot Tone is being generated. OPERATION Voting Tone Encode: When COR is inactive from the receiver to the VTE-, the unit will generate the selected Pilot Tone to the voting comparator. Receive: When COR is active from the receiver to the VTE-, the unit will pass the voice from the receiver to the voting comparator.

9 THEORY OF OPERATION RX Voice Path: RX audio from the base station goes through hipass filter C and RP. RP also serves as the RX input level adjustment pot. This audio is then fed into audio amplifier U: which acts as low pass filter for noise above KHz and if jumper JP is installed it can provide a db per octave de-emphasis if desired. Audio from U: is fed to C. Voice audio is input into the audio mixer U:. The mixer audio is then input into the line amplifier (U0:) which drives T. The line amplifier has an enable transistor that is controlled by the microprocessor. The micro can respond to the COR carrier input and enable this amplifier. Pilot Tone is injected into the audio path at C- PWM input. Power Supply: - VDC is input on the red wire of the Radio Interface connector and then into RF inductor L into an autoresettable polyswitch. D is a polarity protection diode that is designed to pop the resettable fuse if power is hooked up backwards. C and C act as RF bypass caps after the RF inductor L. U acts as a VDC regulator. Its output is fed to all of the analog circuitry and U: acts a pseudo-ground reference at approximately VDC. The VDC on the analog page schematic is also fed over to U which is a VDC regulator shown on the digital page to run the microprocessor and the optional encoders/decodes and serial chips. The relays on the digital page receive their VDC from the VDC regulator. They are driven by opencollector transistors to protect the microprocessor from the VDC.

10 TECHNICAL NOTES No technical notes are available at this time. Midian Electronics Inc. 0 East nd Street Tucson, Arizona USA Orders: -00-MIDIANS Phone: 0-- Fax: sales@midians.com Web: MIDIAN CONTACT INFORMATION 0

11 GND POWER GND POWER A OPTIONAL DTMF ENCODER/ DECODER DTMF_DECODER_ DTMF_DECODER_ D DTMF LED R Q C.u C.u C.u C.u R 00K R 00K R 0K R K R.M D: A R M R 0K C p OSC GS IN- NC St/GT NC ESt VREF IN INH Y.MHz R.M OSC C p VCC 0 U TOE 0 Q GND 0 PWDN Q Q Q STD C.u R 00K C PB0 PB PB PB PT EXTAL Y.0M R M XTAL C0 R BKGD JP R.K V C.u IN IN IC U RESET OUT OUT IM IC GND RESET 0 R R C 0p R C 0u C.u C p C.u VDDX VREGEN VDDA VDDR C p PP 0 C0 0u TP POWER LED R0.K D C0.0µ R R.K C.0µ R.K V C.u - U: LM C.00µ R 00 R.K C.0µ C.0µ R.K - U: LM C.00µ R RP TP R0 PWM_VOICE PWM_VOICE_ A B PWM_ TP RP Q R Q R0 00K R R R R 00K SECONDARY_RX_LINE_EN_DE VOICE_STORE TELCO_FEEDBACK_DISABLE - U: 0 LM R.K C.00µ C.0µ R.K R 00 C.0µ - U: LM ADC INPUT PAD0 FUTURE USE PAD FUTURE USE PAD FUTURE USE PAD FUTURE USE PAD FUTURE USE R 0K R R R R.K C.00µ Q R C.u Q C.0µ R.K R 00K R R.K TP R.K C0.0µ R 00K R 00K R 00K PAD R.K PAD PP0 PE PE R0.K PAD0 PT PB PT PE PE R.K PAD0 PE RXD TXD PA PT PT PB PA D HOOK LED R SCR_PTT_IN D R TRANSMIT LED D RING LED D0 SYNC/TONE LED D: A R R D SCR_OFF_HOOK HOOK R.K RING R.K R Q B Q B JP ) ) JP R0 00K R0.K K - D: A V K - D: A V 0 DFE-DCV 0 RELAYS V TTC- ONLY PTT R0 0K SJ SJ MONITOR OPTIONAL SERIAL INTERFACE JP SJ JP SJ V R 0K PTT C 0u C.u T_IN VCC V SJ T_OUT R_OUT R_IN SJ T_IN 0 T_OUT R_OUT R_IN C C.u GND U NOTE V- C F COR SPARE MONITOR TX OUT C.u _TO VDC RX IN C- C- C.u SEE DOCUMENT 0-INTFCABLE FOR WIRE COLOR DESIGNATIONS RADIO INTERFACE CON RJ-0 B C D = NOT INSTALLED MIDIA ELECTRO ICS, I C. DATE: DW BY: GPC DESIG : CJS REV: APPR DUPLEX_PARALLEL_CROSSOVER SCR_MODE_OUT GUARD_HOLD_TONE FUNCTION_TONE RX_LINE_ENABLE_DISABLE TX_IN_ENABLE_DISABLE TX_OUTPUT_ENABLE_DISABLE VTE- SCHEMATIC COPYRIGHT 00 TELCO_RECV_MUTE SCR_MODE_IN VOX ANTIVOX HLG_DET SEE DOCUMENT 0-INTFCABLE FOR WIRE COLOR DESGINATIONS CON RJ-0 ALL JUMPERS NOT INSTALLED UNLESS SPECIFIED ALL OUT = NO TONE JP = Hz JP = 0Hz JP = 00Hz JP = 00Hz REV F SHEET 0 V SEE DOCUMENT 0-PROGCABLE FOR BOARD REV INFORMATION DOCUME T AME ihs0f_vte PROJECT UMBER of 0 J R C 0p JP JP ) JP JP R0 K D SD D SD C0 R 0p K D SD C R 0p K D SD C R 0p K C 0p C 0p C 0p C 0p R R R R R R R R R 0 R R R0 D SD D0 SD D SD D SD R 00K R 00K R 00K R0 00K D F LED R 00K D F LED R 00K D0 F LED R 00K D F LED R 00K PT PP PT PT0 PP PP PP PP PE PAD0 PE PB PA0 PA PA PA PAD00 PAD0 PAD0 PAD0 R0 0K PROG_IN RXD0 PROG_OUT TXD0 R VSSR VSSPLL TEST VSS 0 VSS 0 VSSA VSSX R C VRH 0 R MCSDCFUE VRL U VDD C.u VDD C.u VDDPLL C.u C R XFC C PB 0 PA PA PE0 0 PAD0 PM0 PM PM PM PM PM 0 PJ PJ R 00K R 00K R 00K D: A D F LED D F LED R 00K C.u D F LED D F LED D F LED D F LED D F LED D F LED D0 F LED D F0 LED R 0K MONITOR/ CARRIER LED TELEMETRY_PTT R R R 0K R R R R R R R R R.K Q Q B R.K SCR_COR R K Q B PAD ADC INPUT FUTURE USE JP Q B JP0 WIRE ) R 00K JP R.K R 00K R 00K D: A V R 00K DFE-DCV K - 0 DFE-DCV Q R 00K Q0 R 00K R 00K SJ Q SJ F/F SJ0 Q R 00K SJ JP SJ Q R 00K V R0 0K Q MONITOR Q Q SJ F COR F SPARE PTT F RXD TXD 0 RX_INPUT TX_MOD_INPUT LOCATED ON ANALOG PAGE 0 CON RJ-0 SEE DOCUMENT 0-INTFCABLE FOR WIRE COLOR DESIGNATIONS C D

12 Ne tr_ NetC_ NetR _ A B C D _TO VDC V C.u R 0K R. V C.u - LM U: GUARD_HOLD_TONE HLG_DET TP0 Q B LO-Z JUMP & HI-Z JUMP & S R0 L R Q B R 00K R K LO-Z HI-Z JUMPER JP BASE STATION TX_MOD_INPUT SEE MCU PAGE C0.00u R.K R L BASE STATION RX_INPUT SEE MCU PAGE R R C 0p C.u R K R TP TP TP RP at center VIN C0 0p F 00 ma Resettable Fuse C 0u C.u R K RP - U0: LM TZ VOLTS ANALOG REFERENCE C.u R 00K V C.u R M PWM_VOICE C.u C.u C.00u RX INPUT LEVEL RP 00K FUNCTION_TONE C 0p C0.u TP Q B R 0K R 0K C.u R0.K C 00p - U: LM R VIN R K D N00 R 0K R K GND DTMF_DECODER_ R.K GUARD/HOLD TONE DETECTION TP Approx V Middle High Lvl Guard TX OUTPUT LEVEL TX_OUTPUT_ENABLE_DISABLE V R0 K R K C.u R 00K C.00u TP R C.0u C.u VOUT U MIC0A KC LOPASS SHORT SJ OR DE-EMPHASIS OPEN SJ R VOICE_STORE C 00p C.u R K R K - U: LM LM - U0: R M SCR_TX_IN R 0K SCR_TX_OUT - U: 0 LMC0 R.K Q C.u R RX AMP JUMPER NO SJ R M R0 0K TP TP R0 0K C.u R 0K TP R R K C.u R K SJ C.u FUNCTION TONE DETECTION D: A D: A D SB C.u D SD V R K R K V approx. 00mvp-p TP C.u R R0.K C C.u C.u R C 000p NPO - U: LMC0 TP Approx Low Lvl Guard TP High Lvl Guard Approx R0 TP R0 R 0K R K R 0K LM - U0: TP R K C 0p R 00K R 00K D: A D: A C.0u LM0 - U: 0 R.K R - U: LMC0 R0 0K R C u R 0K GUARD/HOLD TONE BANDPASS FILTER (00) LM0 - U: R 0K% R.K C 000p NPO C 0p R 0K% R 0K% V COMPANDOR C RECT_IN VCC u ATK_CAP REC_CAP U: G_OUT SA G_IN THD_TRIM TRK_TRIM R 0K TTC- ONLY C u R K R 00K R.K R C0 00p RP R0 0K% C u 000 TO 00 HZ. C V.u LM0 - U: RP K GND R0 0K V C0.u - U: LM V C.u - U: LMC0 TX NOTCH BANDPASS TUNING 000 TO 00 HZ. R 0K% R R R R 0K 0K% R.K (00) (00) (MULTITURN) Approx Vpp@-0dbm LowLvl Guard C 0u TP R 0K R.K RP0 K GUARD/HOLD TONE NOTCH NULL R C.u R0 SCR_RX_IN C.0u (0) R K LM0 - U: R C p - U0: 0 LM R R 0K R 0K% R 0K% R 0K% R 0K% approx. 0mvpp@c ( JP SCR_RX_OUT SECONDARY_RX_LINE_EN_DE SJ C.0u R0 C.0u - U: LM0 R 0K% R R 00K R R0 K R K R C.u C.u C.u (0) DTMF_DECODER_ 0mvpp@-0dbm Low Lvl Guard Q0 R R R0 0K% R0 0K R.K R R.K GUARD_FUNCTION JP C.u R RX NOTCH BANDPASS TUNING 000 TO 00 HZ. R.K R 0K% - U: LM0 R 0K% R RP RP K R 0K% C.0u VCC C -.u U: LM0 RECT_IN ATK_CAP REC_CAP U: G_OUT SA G_IN THD_TRIM 0 GND R 0K R C 00p R 0K% TRK_TRIM R 0K R 0K% R (00) (00) R0 K V C.0u NPO - 0 U: LM0 R C u V DUPLEX_PARALLEL_CROSSOVER C 0u (MULTITURN) C.u ANTIVOX PWM_VOICE MOBILE PRIORITY COMPANDOR TELCO PTT VOX (00) R0 C0.00u - U: LM R 00K R R TP TP RP 00K Q R.M C00 R.M R K TP LM - U: C.u C u PWM_ PWM_VOICE_ C.0u C0 R0 LM - U: 0 R JP WIRE ) R00.K R0 00K R0 K C u C.u C0.u C u R 0K R 0K R 0K R 0K DUPLEX CROSSOVER LEVEL R.M R 0K R.M R0 M R00 K R C0 u R approx..vpp@c TP C - U: LM TELCO_FEEDBACK_DISABLE C.u R0 0K R 0K R 0K C.u R C 0p C0 u R0 0K AUDIO MIXER C.u Q Y RP M C RP M Q Y TELCO_RECV_MUTE R R K R 00K R.K GUARD/HOLD TONE NOTCH/ BANDPASS FILTER R RP 0K R U: - LM TP0 Low Lvl Guard - RP at center R 0K C.u R 0K R 00K R0 C.0u Q0 LM - U: RX LINE LEVEL R K RX_LINE_ENABLE_DISABLE R K Q TX AMP KC LOWPASS C0 p R0 0K R K TP TX_IN_ENABLE_DISABLE R K C.0u R0 00K C.u C0.u C.u R0 00K R 0K - 0 U: LM R K R0 00K C0.u R K TP C 0p RP 0K Q0 GUARD_FUNCTION R0 C LM - K.u U: 0 R R0 Q RX LINE AMP R 00K LM0 - U0: LM0 - U0: RP 0K V R 00K R 00K C0.u RING HOOK C0.u 00 Hz HIGHPASS R0 K C p U0: LM0 VDD SHUTDOWN BYPASS GND GND TAB XMIT(-) RI OFFHK RCV RP 0K C 0u VCC U CH OPTION C XMIT() C.u C.u Transmitting to Remotes at -0 db TP should be approx 0mvp-p. GND 0 R C00 u C0.u C 0u JP V TIP RING R C 0u R TP R ) JP0 R0 T TU0RC P S P S R T OPTION J WIRE RX/TX WIRE RX ONLY TELEMETRY_PTT TELEMETRY RADIO MODULATION MICROWAVE (M LEAD) CJS C0.00u C.00u L C.00u C TZ.00u P000 OPTION J C.00u L TZ P00 OPTION C L L C.00u L 00 ma Resettable Fuse RX LINE LEVEL R TTC- POTS OPTION L TELEMETRY RADIO RECV AUDIO OPTIONAL WIRE TX ONLY TZ P00 OPTION C TZ P00 OPTION C F 00 ma Resettable Fuse OPTION C F TZ P000 TZ P000 TZ P000 Q TTC- TELEMETRY RADIO OPTION DATE: DW BY: GPC TELEMETRY RADIO OPTIONAL F 00 ma Resettable Fuse OPTION C F 00 ma Resettable Fuse TZ P000 OPTION J TZ0 P000 OPTION J MIDIA ELECTRO ICS, I C. DESIG : JP JP JP REV: F F 00mA Resettable Fuse OPTION J 00 ma Resettable Fuse OPTION J APPR C.00u KV C.00u KV C0.00u KV C.00u KV C.00u KV C.00u KV R0 VTE- SCHEMATIC R0 = NOT INSTALLED COPYRIGHT 00 VIN PAD SPARE POTS RJ- CON BLK J EARTH CHASSIS GROUND RED GRN YEL CON TTC OPTION G TTC OPTION H VOICE SCRAMBLER SCR_PTT_IN SCR_TX_OUT SCR_TX_IN JP SCR_COR 0 JP SCR_MODE_IN SCR_OFF_HOOK SCR_MODE_OUT SCR_RX_OUT SCR_RX_IN REV F D SHEET 0 0 A CON RJ-0 ihs0f_vte of 0 DOCUME T AME PROJECT UMBER B C D

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