| (3) First and
Second IF Adjustment |
| |
| Set the MODE switch
to the LSB/CW the ATT switch to the DX position, and rotate the ATT control
fully counterclockwise. Connect a signal generator to the antenna jack,
J1, and set its frequency to 8.01 MHz. Tune
the receiver to 8.01 MHz, set the signal generator output to a level sufficient
to obtain deflection of the S meter, and adjust T1004 - T1008 and
T1011 - T1014 for a maximum S-meter reading. |
| |
| (4) S Meter
Sensitivity and Full Scale Adjustment |
| |
| a. |
Preset the controls, switches,
and dial frequency as in step 3. Set the signal generator output level to 8 dB
(ref: 0 dB = 1mV). Adjust VR1002 so that the S meter just begins to move off the
left hand peg on its scale. |
| |
| b. |
Set the signal generator output
level to 90 dB. Adjust VR1004 for a full
scale reading on the S meter. |
|
|
| (5) NB
Adjustment |
| |
| a. |
Connect a VTVM to the source of
Q1037 and a signal generator to antenna jack
J1. Set the signal generator output level to
20 dB, output frequency to 8.01 MHz, and adjust T1015 - T1017 for a
minimum reading on the VTVM. |
| |
| b. |
Connect a noise generator to
antenna jack J1, and press the NB switch.
Adjust VR1001 for a minimum noise level from
the speaker. |
| |
| (6) Trap
Adjustment |
| |
| Connect a signal
generator to antenna jack J1, and set its
frequency to the first IF frequency, 48.055 MHz. Set the signal generator
output level to a level sufficient to obtain deflection on the S meter, then
T1002 for a minimum reading on the S
meter. |
|
