RF Driver AUgnment (PTBM058)
1 ) Set the Channel selector to 60 with the Band selector set to
Mid.
2) Feed 2,400 Hz 10 mV audio to unit.
3} Adjust T6, L11, L12 and L13 for maximum output on RF Wattmeter.
4) Remove testing audio.
5) Adjust RV4 and RV5 for minimum carrier leakage on scope.
Two-Tone AUgnment (Refer to nextpage diagram)
1) Feed 500 Hz and 2,400 Hz audio tones to the mic circuit simultaneously. Use tw o audio signal
generator sets.
2) Adjust both testing audio levels by means of attenuators on the generators, so that the scope
présents wave figure like shown as 'A ' of diagram next page.
3) Adjust RV11 to obtain 12W PEP power output.
AM /FM RF Power AUgnment
1) Set Mode switch to AM, TX mode, channel 60.
2) Set RF Power switch to 0.5W.
3) Adjust RV9 to 0.5W on Wattmeter.
4) Set RF Power switçh to 4W.
5) Adjust RV8 to 4W on Wattmeter.
AM Modulation AUgnment
1) Apply 2,400 Hz 7 mV audio to the unit microphone input.
2) Adjust RV12 for modulation depth of 80%.
3) Increase audio level to 70 mV.
4) Check modulation depth increases to 90%.
FM Modulation AUgnment
1) Set the Mode switch to
FM
position.
2) Apply 2,400 Hz 10 mV audio to modulation circuit. Use dummy mic plug.
3) Connect déviation meter to antenna output on the unit.
4) Adjust RV3 (PTOS006) to obtain 1.5 kHz déviation.
RF Power Meter AUgnment
1) Set the unit to
AM
mode.
2) Comparing the external RF power meter and the one built-in the unit, adjust RV3 (PTBM059)
for equal indication on the unit power meter.
Transmitting Frequency Check
Verify that the frequency counter indicates channel frequencies tabulated in the
Frequency Table
with tolérance within ±800 Hz.
Receiver
Alignment
Connect testing equipment as shown:
EXT
AN T
SP
Receive Mode
13
