MITEQ, Inc. AMF AMPLIFIERS TYPICAL ACCEPTANCE TEST PROCEDURES USING MANUAL METHOD

Transcription

1 DSH NO. PPLICTION NEXT SSY USED ON REVISIONS LTR DESCRIPTION DTE PPROVED INITIL RELESE 3/28/2006 MEron MITEQ, Inc. MF MPLIFIERS TYPICL CCEPTNCE TEST PROCEDURES USING MNUL METHOD LL PGES RE OF ORIGINL ISSUE () EXCEPT S NOTED CONTR. NO. PREP BY CHKD BY PROJ ENGR PPROVL (PROJ) PPROVL (Q) 45D219 NME DTE KJ Bovaird 3/28/2006 KJ Bovaird 03/29/06 MEron 03/29/ Davids Drive, Hauppauge, New York OPERTING PROCEDURE, SPEC CONTROL, MPLIFIERS DEPT 45 SCLE REV SHEET 1 OF 11

2 Table of Contents Page Table of Test 2 List of Equipment 3 Scope 4 Test Conditions 5 Electrical Test 5-10 Marking, Configuration, Envelope Dimensions, and Weight 10 Workmanship Inspection 10 Test Set-Up & Figures CCEPTNCE TEST PROCEDURE FOR: Microwave mplifiers Table of Tests Page VN Calibration Gain Input, Output VSWR Gain Flatness Reverse Isolation Noise Figure Power Management mplitude Tracking (Optional) Phase Tracking (Optional) Phase Linearity (Optional) Harmonics (Optional) Two Tone Third Order Intercept Point (Optional) Two Tone Second Order Intercept Point (Optional) Input Power Limit (Optional) D.C Power Marking, Configuration, Envelope Dimensions and Weight Workmanship Inspection Detector Output (Optional) Saturated Power (Optional) 12 SCLE REV SHEET 2 OF 11

3 The following Test Equipment or equivalents shall be used to perform the testing described within this document. List of Equipment Hewlett-Packard HP8510B Hewlett-Packard HP8970B Hewlett-Packard HP346 Hewlett-Packard HP435B Gigatronics 8563E Hewlett-Packard HP8481H Hewlett-Packard 8563E Beckman 310 Wiltron Hewlett-Packard HP833650L Wiltron 6617B Systron-Donner 6246 Miteq Hewlett-Packard 6216 Hewlett-Packard HP7550 Hewlett-Packard HP Vector Network nalyzer (VN) Noise Figure Meter Noise Source Power Meter Universal Power Meter Power Sensor Spectrum nalyzer System Digital Multi meter (DMM) Vector Network nalyzer (VN). Synthesized CW Sweeper(10MHz-50GHz). Programmable Sweep Generator Frequency Counter Mixer (2-40 GHz) DC Power Supply (0-30 Volts DC) Plotter Variable ttenuator (0-110 Db SCLE REV SHEET 3 OF 11

4 Test Procedures 1.0 Scope The purpose of this TP is to provide instructions to facilitate the typical electrical test of MITEQ mplifiers using manual methods. 2.0 Customer provided specifications or Miteq standard products. 3.0 Test Conditions. -54 C case temperature (or as required) B. +23 C case temperature C. +85 C case temperature (or as required) 4.0 Electrical Tests These tests are performed at room temperature (+23 C) only, but the unit will operate over full specified temperature range. Temperature data is available as an option Calibration of VN (Figure 1) Calibrate HP8510B as indicated in the 8510B Operator's Manual (FULL 2-PORT CL) with the following instrument settings: STRT FREQUENCY: See amplifier electrical specs. STOP FREQUENCY: See amplifier electrical specs. SOURCE : +5 dbm or lower for high gain units PORT 1 TTENUTOR: 30 db PORT 2 TTENUTOR: 10 db Perform Full 2-Port Calibration. Follow the instructions as on the VN screen. Save INSTRUMENT STTE in memory register of VN. (Save also on floppy disk if required). HP 8510 VECTOR NETWORK NLYZER PORT 1 PORT 2 RF TEST CBLE IN DUT RF TEST CBLE +V GND SUPPLY FIGURE 1. GIN, VSWR, ISOLTION TEST SET-UP SCLE REV SHEET 4 OF 11

5 4.2.0 Gain Set up as in Figure Insert DUT and apply DC power Press "S21" and record marker 1 values of gain for each frequency For plot data, set parameters as follows: SCLE: 1 db/div REFERENCE POSITION: 0 DIV REFERENCE VLUE: djust such that trace appears in middle of display Confirm whether the gain falls within gain window specification Obtain hard-copy plot or note the measurements on the data sheet in tabular form Repeat for -54 C and +85 C (if required). Plot all traces on same paper. Confirm whether the gains fall within the specified limits Input/Output VSWR Setup as indicated in Figure Recall the calibrated data on VN (which was saved in step 4.1.3) and activate DUT Press "S11" and obtain trace on CRT in VSWR format or return loss format Press "MRKER 1" and set it at the start frequency. Record marker values on data sheet or plot Repeat every required step frequency to upper end of band Press "S22" and repeat for output VSWR. Record the data on data sheet or plot Gain Flatness Use MRKER TO MX and MRKER TO MIN operations from MRKER MENU to locate maximum and minimum points for gain traces. Then use DELT MRKER and divide the reading by 2. This will yield the gain flatness value Reverse Isolation (Figure 1) Set up equipment as shown in Figure Connect DUT to HP8510 network nalyzer Enter part number, serial number, and test title into network analyzer Set scale to 10dB/division Press S12, press to obtain hard copy or record in tabular form Noise Figure (Figure 2) Set up equipment as indicated in Figure 2. Use set up for DIRECT N.F. measurement ( 1800 MHz), and use set up B for MIXER N.F. measurement ( 2 GHz). SCLE REV SHEET 5 OF 11

6 HP 8970B NOISE FIGURE HP 8970B NOISE FIGURE RF IF MIXER BUS NOISE SOURCE +15V GND SUPPLY. DIRECT NOISE FIGURE MESURMENT (TO < 1800 MHz) NOISE SOURCE +15V SUPPLY GND +10DbM PROG SWEEP GEN B. MIXER N.F. MESURMENT (TO > 2GHz) LO FIGURE 2. NOISE FIGURE SETUP Set Sweep Generator to "CWF1" mode (F1 = start frequency). Set power level to +10 dbm Insert the amplifier (DUT) into set-up as shown in Figure ctivate DUT and measure Noise Figure in db. Record on data sheet or Plot Repeat for each required steps to the upper end of the frequency band Measurement of output power at 1dB compression Set-up power measurement as shown in Figure 3. +V SIG GENERTOR f 0 P set 10dB N.O. MP P set (Power set by Operator) Switchable ttenuator P in P out (Output Power of mplifier) FIGURE 3. MESUREMENT SETUP Set frequency of interest to a power level at P set If expected power of the amplifier is P exp Set P set so that P out = P exp - 9dB When switch of switch able attenuator is closed, input power to amplifier Pin is is increased by 10dBm. Close switch now If Pout = Pexp That is output power at 1dB compression. SCLE REV SHEET 6 OF 11

7 4.7.6 If Pout > Pexp Open switch and repeat Set Pout 1dBm higher than before. Continue step & If Pout < Pexp Open switch and repeat Set Pout 1dBm lower than before. Continue step & Repeat step or with 0.5dBm change until step is satisfied that is the output power at 1dB compression point of amplifier mplitude Tracking (optional) For the paired amplifiers, overlay the plots of each amplifier obtained from and confirm whether amplifiers are within specified limits Phase Tracking (Optional) a. Store S21 phase data into DT MEMORY 1. b. Press "/" in math operations menu. c. Remove reference LN and insert other amplifier of pair. d. The trace displayed on the CRT is the maximum phase deviation between the pair (vs. frequency). e. Plot and check against specification limits Phase Linearity (Optional) For Phase linearity measurement. Perform step than press "PHSE" and then "UTO DELY". djust PHSE OFFSET and ELECTRICL DELY such that trace is flat as possible and in middle of display. Set REFERENCE VLUE to 0 degrees. Set SCLE to 5 deg./div. record the data or plot Repeat to obtain plots for each temperature on the same paper (if temperature data is required) Harmonics (Optional) (Figure 4) sample demonstration is performed to check the 3rd harmonic level of the DUT. Set up as indicated in Figure 4. SWEEP GEMERTOR VRIBLE TTENUTOR 20 db PD SPECTRUM NLYZER FIGURE 4. HRMONICS MESUREMENTS SET-UP Set Sweep Generator to "CWF1" mode. djust attenuator and level of Sweep Generator such that the DUT is operating in the linear mode (at least 10dB below 1dB compression point) Now connect DUT output to Spectrum nalyzer. Set input attenuation to auto. Observe the difference in power levels between the fundamental and 2nd harmonic signals. Check the level in dbc against the customer s specs Two Tone 3rd order intercept point (Figure 5) (Optional) For this test, care must be taken that the test system does not create intermod production that may cause DUT to fail. This is accomplished by having sufficient isolation between sources and not over driving the spectrum analyzer. (Check spec. analyzer ZP3 mixer level) SCLE REV SHEET 7 OF 11

8 5.2.1 Setup equipment as shown in Figure 5. DUT has output power at least +10dBm. PROG SWEEP GEN. VRIBLE TTENUTOR +25dBm MP DETECTOR SPECTRUM NLYZER S +25dBm SUPPLY FIGURE 5. MESUREMENT SET-UP FOR TWO TONE INTERCEPT POINTS Set frequency of source 1 to f1 GHz and source 2 to (f ) GHz (10MHz apart). On Spectrum nalyzer set CF to f1 +5 MHz span to 50 MHz djust power of source 2 to read -20dBm on the power meter Connect source 2 to analyzer and adjust reference level on spectrum analyzer so that signal peaks at top of the grid. This establishes a reference point of -20dBm at top of the spectrum analyzer screen Connect DUT in setup with a 20 db attenuation at the output of DUT. (See figure 5). Turn on bias voltage to the DUT djust power level of source 1 and 2 (one at a time keeping the other RF OFF) so that two fundamental signals peak at top of the grid. (mplifier output level is now at 0 dbm.) Measure delta between fundamental signal and intermodulation product The formula to calculate output IP3 is ((Fund-IM3)/2 )+ Output level) Record IP3 on data sheet. Repeat steps to for other required frequencies Two Tone 2nd order intercept Point (IP2) (Figure 4) (Optional) Setup equipment as shown in Figure Set the source 1 and source 2 to create the required SPUR frequency Perform to step Measure delta between fundamental signal and IM The formula to calculate output IP2 is (Fund-IM2 + Output level) Record IP2 on data sheet Repeat steps for other required frequencies Input Power Limit (Optional) (Figure 6) Set up as in Figure 5. The input power handling capability can be demonstrated on any DUT as follows: SCLE REV SHEET 8 OF 11

9 PD 3 db SOURCE 1 RF PD 10 db SOURCE RF PD 1 10 db COMBINER PD 3 db FOR CLIBRTION PURPOSES ONLY PD 20 db SPECTRUM NLYZER TT Level: 10dB Ref Level: -20dB RBW: uto VBW: uto Span: 50MHz C f =f 1 +5MHz FIGURE 6. INPUT HNDLING djust the sweep generator CW frequency and power level with the variable attenuator until +25 dbm is read on the power meter, at the output of the medium power test amplifier Insert DUT in set-up and apply power. Do not connect detector at output of DUT at this time. Place a 50Ω termination there instead. Leave amplifier in this operation mode for 5 minutes fter 5 minutes have elapsed, repeat paragraphs and record data. The two sets of data should compare favorably if the DUT still working properly and limiter is working D.C. Power Measure current being drawn by DUT using digital multi meter with power supply at specified bias voltage. Record the current Marking, Configuration, Envelope Dimensions and Weight Dimensions of all deliverable units shall be as specified in the applicable product specification or quotes provided to customer Units will be laser marked Weight of the units T.B.D Workmanship Inspection Internal visual inspection shall be as per MITEQ procedure number (MITEQ Series 883 Screening), and procedure number (commercial) The external visual inspection shall be as per MITEQ procedure number (MITEQ Series 883 Screening), and procedure number (commercial). Which will verify materials, design, construction, physical dimensions, finish, marking, and workmanship Detector output measurement. (Figure 7.) (Optional) SCLE REV SHEET 9 OF 11

10 +V SWEEP GEMERTOR UUT DET DIGITL MULTI FIGURE 7. DETECTOR PUT MESUREMENT SET-UP Setup equipment as indicated in Figure Set sweep generator frequency to CW and the start frequency djust the input power to the UUT as per requirement Monitor the voltage output at the digital multi meter Make a note of this output voltage Vs frequency Repeat this step up to the stop frequency and note the detector output voltage Repeat step to for different input level as per customer s requirement fter completion of the test use this data to make a plot. Excel program is preferred. For example, see plot below. Power DBm Det. Out mv Det. Votage in mv Det. Out Vs Power Out Det. Out 0 Power in dbm -43 TO -30 dbm SCLE REV SHEET 10 OF 11

11 5.9.0 Saturated Power measurement (Optional) Setup the equipment as per figure 8. +V SIG GENERTOR IN MP Frequency + (Power set by Operator) P set GROUND Saturated (Output Power of mplifier) FIGURE 8. STURTED MESUREMENT SET-UP Set the CW frequency of interest in and monitor the power out on the power meter Increase the input power to the UUT until the out power is constant/saturation When output power can not increase any more, this is the saturated power Repeat the step to for other frequency steps This measurement can be achieved by using utomatic Test Equipment SCLE REV SHEET 11 OF 11