Receiver Alignment - Galaxy DX 959 Service Manual

4.1.3 RECEIVER ALIGNMENT

ITEM U.U.T. SETTING
AM Sensitivity Set radio to CH 19 AM RX MODE.
Clarifier setting in 12 o'clock.
RF Gain fully clockwise, SQ fully counter
clockwise.
VOL control at 2 o'clock.
Connect RF SG to antenna jack
Set frequency to 27.185 MHz, MOD 30%.
Set radio to CH 40 AM mode.
RF SG setting 27.405 MHz.
Set radio to CH 1 AM mode.
RF SG setting 26.965 MHz.
USB Sensitivity Set radio to CH 19 USB mode.
VOL control fully clockwise.
RF SG setting 27.186 MHz @ 0.5 uV
Set MOD to off
LSB Sensitivity Set radio to CH 19 LSB mode.
VOL control fully clockwise.
RF SG setting 27.184 MHz @ 0.5 uV
MOD to off
NB Adjust Set radio to CH 19 AM mode
RF SG setting 27.205 MHz,
MOD 30%, 100 uV, NB/ANL switch on
Connect Voltmeter to TP1
AM Squelch Set radio to CH 19 AM mode
SQ control at fully clockwise.
RF SG setting 10 mV, MOD 30%
SSB Squelch Set radio to CH 19 USB mode.
SQ control fully clockwise.
RF SG setting 10 mV
AM S/RF Meter Set radio to CH 19 AM mode.
AM S-Meter Meter switch at S/RF position.
RF SG setting 27.185 MHz,
MOD 30%, 100 uV
SSB S- Meter Set radio to CH 19 USB mode.
S/RF switch at S/RF position.
RF SG to 27.186 Mhz. @100 uV, MOD off
ADJUST
POINT
L2, L3, L5,
L6, L7, L8,
L9, L10
L6, L7
L11, L12
L11, L12
L1
VR4
Slowly
VR3
Slowly
VR1
VR2
- 16 -
MEASUREMENT
Audio output > 2V
S/N 10 dB
For balance
between CH1 and
CH40.
Audio output > 2V
S/N 10 dB
Audio output > 2V
S/N 10 dB
DC voltage to max.
(>2.0V)
Adjust very slowly
until squelch just
closes.
Adjust very slowly
until squelch just
closes.
Meter needle to S9
on the S scale.
Meter needle to S9
on the S scale.