TECHNICAL SUPPORT
Alignment ProceduresTexas Ranger TR-696F
PLL Alignment - Transmitter Alignment - Receiver Alignment
Equipment required for Alignment procedure:
• DC Power Supply ( 13.8 Vdc, 20A )
• RF Wattmetter ( 25~60 MHz, 100W )
• Digital voltmeter or Multimeter.
• Automatic Modulation Meter.
• Audio Signal Generator
• Digital voltmeter or Multimeter.
• Frequency Counter - 100 MHz
• RF Signal Generator - 100 MHz
• Automatic Distortion Meter
• Oscilloscope (50 MHz), with X10 probe
• SINAD Meter
• 50 W dummy load
To view proper test equipment setup for both the receiver and transmitter portion of the alignment procedures, please see this drawing - Test Setup. After viewing, press "back" to return to this page.
To view Main PCB Adjustment Location of adjustment points, please see this drawing - TR-696F Main PCB. After viewing, press "back" to return to this page.
The following steps are required to re-align the TR-696F.
Caution: Alignment should only be attempted by personnel trained in RF product testing and alignment.
PLL Synthesizer Alignment:
1. VCO Voltage:
Disconnect the "short PCB" from TP7, TP8, and TP9. Set radio to CH 1 AM RX mode, set the Clarifier setting to 12 o'clock, connect a voltmeter to TP2.
Adjust L14 for 2.5 Vdc ± 0.1.
Connect ocilloscope to TP2
Adjust L15 for maximum output.
Set radio to CH 1 AM RX mode, connect frequency counter to Pin 7 of IC3.
Adjust VC1 to 10.2400 MHz ± 20Hz.
2. AM Frequency:
Set radio to CH 1 AM RX mode, connect frequency counter to TP3.
Adjust L20 to 16.27000 MHz ± 20Hz.
3. USB Frequency:
Set radio to CH 1 USB RX mode, connect frequency counter to TP3.
Adjust L21 to 16.27250 MHz ± 20Hz.
4. LSB Frequency:
Set radio to CH 1 LSB RX mode, connect frequency counter to TP3.
Adjust L22 to 16.2675 MHz ± 20Hz.
5. TX Frequency:
Set radio to CH 1 AM TX mode, connect frequency counter to TP3.
Adjust VR8 to 17.5500 MHz ± 20Hz.
6. AM OSC:
Set radio CH 1 AM TX mode, connect frequency counter to TP5.
Adjust L23 to 10.69500 MHz ± 20Hz.
7. USB OSC:
Set radio CH 1 USB TX mode, short Q34 E & C, connect frequency counter to TP5.
Adjust L24 to 10.69750 MHz ± 20Hz.
6. LSB OSC:
Set radio to CH 1 LSB TX mode, connect frequency counter to TP5.
Adjust L25 to 10.69750 MHz ± 20Hz.
This completes the PLL alignment procedure.
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Transmitter Alignment:
1. BIAS Current:
Set radio to CH 19 USB TX mode, modulation off. Connect multimeter to TP7 (+) and TP9 (-).
Adjust VR12 for 10mA.
Adjust VR10 for 50mA.
2. SSB TX Power:
Set radio to CH 19 USB TX mode, connect the "short PCB" to TP7 and TP9, connect RF power meter to antenna jack, AF signal 30 mV, 1 KHz to microphone, set mic gain to fully clockwise.
Adjust L40, L42 for maximum of 12 watts output
Adjust L43, L44 for minimum spurious emission.
Set radio to CH 1 USB TX mode
Adjust VR13 for 11.5 watts output.
Set radio to CH 40 USB TX mode
Balance with CH 40 for a maximum of 12 watts output.
Set radio to CH 19 USB TX mode, MOD off, connect voltmeter to TP7.
Adjust VR17 for 12.5VDC
3. AM TX Power:
Set radio to CH 19 AM TX mode, no modulation.
Adjust VR14 for 3.8W.
4. AM Modulation:
Set radio to CH 19 AM TX mode, audio signal 30 mV, 1 KHz to microphone.
Adjust VR16 for 90%.
This completes the Transmitter stage of the alignment procedure.
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Receiver Alignment:
1. AM Sensitivity:
Set radio to CH 19 AM RX mode, clarifier setting at 12 o'clock, RF gain fully clockwise, SQ at minimum, VOL control at 2 o'clock, connect RF SG to antenna jack, ( Frequency 27.185 MHz, Mod 30% )
Adjust L2, 3, 5, 6, 7, 8, 9, 10 for Audio Output > 2V S/N 10db.
Set radio to CH 40 AM RX mode, RF SG setting to 27.405 MHZ.
Adjust L2, 3, 5, 6, 7, 8, 9, 10 for Audio Output > 2V S/N 10db.
Set radio to CH 1 AM RX mode, RF SG setting to 28.245 MHZ.
Adjust L2, 3, 5, 6, 7, 8, 9, 10 for Audio Output > 2V S/N 10db.
2. USB Sensitivity:
Set radio to CH 19 USB RX mode, set VOL control fully clockwise, RF SG setting 27.186 MHz mod 0.5µV,
Adjust L11, L12 for audio output > 2V, S/N 10db.
3. LSB Sensitivity:
Set radio to CH 19 LSB RX mode, set VOL control fully clockwise, RF SG setting 27.184 MHz mod 0.5µV.
Adjust L11, L12 for audio output > 2V, S/N 10db.
4. NB Adjust:
Set radio to CH 19 AM RX mode, RF SG setting 27.205 MHz, Mod 30%, 100 µV, NB-ANL/OFF switch to NB/ANL position, connect voltmeter to TP1.
Adjust L1 for DC Voltage to max ( > 2.0V ).
6. AM Squelch:
Set radio to CH 19 AM RX mode, SQ control fully clockwise, RF SG setting 1 mV, mod 30%
Adjust VR4 very slowly until squelch just opens.
7. SSB Squelch:
Set radio to CH 19 USB RX mode, SQ control fully clockwise, RF SG setting 1 mV.
Adjust VR3 very slowly until squelch just opens.
8. AM S/RF Meter:
Set radio to CH 19 AM RX mode, meter switch to S/RF position, RF SG setting 27.185 MHz 100 µV, mod 30%.
Adjust VR1 so that meter needle goes to S9 on the S scale.
9. SSB S/RF Meter:
Set radio to CH 19 USB RX mode, meter switch to S/RF position, RF SG setting 27.186 MHz mod 30%, 100 µV.
Adjust VR2 so that meter needle goes to S9 on the S scale.
This completes the Receiver stage of the alignment procedure.
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