Ranger_AR-3300_3500_adjust.pdf

AR-3300 & AR-3500 Alignment Procedures SYNTHESIZER 1. - Set radio to 29.9000 Mhz. FM mode. 2. - Connect DVM to TP-1 and adjust T-13 for 3.8 VDC. 3. - Set the radio to 28.0000 Mhz. ( Clarifier Center ) 4. - Connect Scope to TP-2. Adjust T-12 for Max in AM mode. 5. - Connect Scope to cathode of D-77. Adjust T-11 for Max in AM mode. NOTE : Step 2 of SSB Transmitter Alignment should be done at this time as it effects 10.695 Mhz. Oscillator adjustment. Please note that radios with the optional 2.6 Khz. SSB filter use different offset frequency adjustments. The filter can be identified by the markings on the top. ( 10M2.6D is the 2.6 filter ). 6. - Connect frequency counter to TP-3 ( High impedence probe ). 4.2 Khz. 2.6 Khz. A. - Adjust T-16 for 10.6925 - or - 10.6935 in USB mode. B. - Adjust T-17 for 10.6975 - or - 10.6965 in LSB mode. C. - Adjust T-15 for 10.6943 - or - 10.6943 in CW mode. D. - Adjust T-14 for 10.6950 - or - 10.6950 in AM TX mode. 7. - Connect frequency counter to TP-2. 4.2 Khz. 2.6 Khz. A. - Adjust VR-3 for 17.3050 - or - 17.3050 in FM mode. B. - Adjust VR-1 for 17.3075 - or - 17.3065 in USB mode. C. - Adjust VR-2 for 17.3025 - or - 17.3035 in LSB mode. 8. - Adjust T-14 for output freq. of 28.0000 Mhz. FM mode. RECEIVER IF ( 10.695 Mhz.) 1. - Set radio in AM mode. Apply a 10.6950 Mhz. ( AM modulated at 60% ) signal from signal generator through a 10 to 1 probe to the emitter of Q-2. ( Output of Signal Generator should be just enough to produce output at speaker, about 12 db. Sinad.) 2. - Adjust T-4, T-5, T-8, T-9, and T-10 for Max AF output. NOTE : Any excessive Signal Generator output will activate AGC and cause a false alignment. 3. - Set radio to CW mode, Signal generator to 0% modulation. Adjust T-6 & T-7 for max audio output. NOISE BLANKER 1. - Connect a noise generator ( Sencore NL 204 or equivalent ) in series with signal generator output. Connect Scope to TP-4. Set signal generator for 20 uV. output. Adjust T-400 & T-401 for Max peaks. HIGH FREQUENCY 1. - Set radio to 28.0000 Mhz. on AM mode. 2. - Apply a 28.0000 Mhz. ( AM modulated at 60% ) signal to antenna. 3. - Adjust T-1, T-2 & T-3 for max AF output ( output of Signal Generator should be about 12 db Sinad. IF NOISE 1. - Set radio to LSB mode and disconnect any input to antenna terminal. 2. - Adjust R-39 ( IF GAIN ) for an AF output of 0.2 VRMS with AF GAIN at MAX S METER 1. - Set radio to 28.0000 Mhz. on FM mode 2. - Apply a 28.0000 Mhz. signal to antenna at 50 uV. 3. - Adjust VR-7 so that four LED bars are lit. 4. - Set radio to USB mode. 5. - Adjust VR-9 so that four LED bars are lit. FM QUADRATURE 1. - Set the radio to FM mode. Inject a 28.0000 FM deviation at 5 Khz, 1 Khz tone signal from signal generator to antenna. Connect scope to junction of R-123 & C-96. 2. - Adjust T-18 for Max sin wave with minimum distortion. TRANSMITTER - SSB MODE 1. - Set radio to 28.0000 Mhz. on SSB mode. 2. - Set MIKE GAIN to minium and adjust VR-9 & VR-10 ( Balanced Modulator) for minimum RF output These controls should be balanced for even output on LSB & USB. IF ADJUSTMENT IS REQUIRED AT THIS STEP THEN REPEAT STEP 6 OF PLL-VCO ALIGNMENT. 3. - Set MIKE GAIN to Minimum, MODE to LSB TX. Connect DVM to ferrite bead side of R- 198 and ground. Adjust VR-14 for 0.68 VDC (Driver Bias.) Move DVM to ferrite bead side of R-190 Adjust VR-12 for 0.68 VDC ( Final Amp Bias.) Move DVM to ferrite bead side of R-194 Adjust VR-13 for 0.68 VDC ( Final Amp Bias.) NOTE : After VR-12, VR-13 are adjusted, Re-Adjust VR-14 for best swing. 100 WATT BIAS ADJUSTMENT Remove Red power lead of amplifier at main power jack. Insert AMP Meter in series with removed red wire and positive pin of power jack. Adjust VR-101 for 150 Milliamperes. 4. - Set Mike Gain to max and apply 1,000 Hz. tone to microphone. Adjust VR-15 for Max RF output. 5. - Adjust T-22, T-21, T-20 & T-19 for Max RF output 6. - Balance RF output between lowest & highest freq. with L-6, L-7 & L-9 7. - Readjust VR-15 (ALC) so that output power just starts to drop ( about 2 watts.) AM MODE 1. - Set radio to 28.0000 Mhz. AM mode, Mic gain Max. 2. - Adjust VR-6, ( AM POWER ) for 7 Watts output power ( 30 Watts for 100 Watt Model ) 3. - Apply 1,000 Hz. tone to microphone and Adjust VR-17 (AMC) for 95 % FM MODE 1. - Set radio to 28.0000 Mhz. FM mode, Mic gain Max. 2. - Apply 1,000 Hz. tone to microphone and Adjust VR-4 ( FM DEV ) for a maximum deviation of 5 Khz. RF OUTPUT METER 1. - Set radio to 28.0000 Mhz. FM mode. 2. - Adjust VR-11 so that two LED bars are lit with 7 Watt output power.