150GTL ALIGNMENT REVISION: 1.0 BURKE
Page:4 print date: 2/14/06
3.0 RECEIVER ALIGNMENT
Connect an AC VTVM with 8 ohm load across speaker coil.
Adjust volume control to obtain a suitable indication.
Set generator output low enough to prevent AGC limiting.
Preset controls as follows, unless otherwise noted:
RF Gain maximum, Squelch minimum, NB/ANL off.
STEP PRESET TO CONNECTIONS ADJUST PROCEDURE
1 RX mode, AM
28.000MHz
Output of signal generator to
antenna connector.
Freq. = 28.000MHz, 1KHz 30%
modulation, RF output 1µV
T710
Adjust for maximum signal on
VTVM
2 Same as step 1,
squelch to
maximum
Output of signal generator to
antenna connector.
Freq. = 28.000MHz, 1KHz 30%
modulation, RF output 1500µV
RV2 SQUELCH RANGE
Adjust just until squelch opens
3 Same as step 1
Output of signal generator to
antenna connector.
Freq. = 28.000MHz, NO
modulation, RF output 100µV
RV15 SIGNAL METER
Adjust for a reading of S-9 on the
analog meter of the radio
4
RX mode, AM,
28.000MHz,
NB/ANL switch
set to NB/ANL
Output of signal generator and
noise pulse generator to antenna
connector.
Freq. = 28.000MHz, 1KHz 30%
modulation, RF output 1µV.
Oscilloscope to collector of Q6
T701 NOISE BLANKER
Adjust for maximum amplitude
on oscilloscope
5 RX mode, FM,
28.000MHz
Output of signal generator to
antenna connector.
Freq. = 28.000MHz, 2.5KHz
deviation, RF output 1µV
T702 Adjust for maximum signal on
VTVM
4.0 TRANSMITTER ALIGNMENT
Maintain a 50 ohm 25 watt dummy load on the antenna connector for the following steps.
Preset controls as follows, unless otherwise noted:
RF Power set to HI, Mic Gain to minimum.
STEP PRESET TO CONNECTIONS ADJUST PROCEDURE
1 TX mode, AM,
29.700MHz RF wattmeter to antenna
connector
T718, T719,
T720, T721,
T722, T723 Adjust for maximum RF output
2 Same as step 1 Same as step 1 L21 RF POWER - HI
Adjust for 13-17 watts on all
bands
3 Same as step 1,
Power switch to LO Same as step 1 RV9 RF POWER - LO
Adjust for 4 watts
