- 16 -
ITEM U.U.T.
SETTING
ADJUST
POINT
MEASUREMENT
AM Sensitivity
Set radio to CH 19 AM RX MODE.
Clarifier setting at 12 o’clock.
RF Gain fully clockwise,
SQ fully counter clockwise.
VOL control at 2 o’clock.
Connect RF SG to antenna jack
Output Frequency 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.
L2, L3, L5,
L6, L7, L8,
L9, L10
L6, L7
Audio output > 2V
S/N 10 dB
For Balance
between CH 1 and
CH 40
USB Sensitivity
Set radio to CH 19 USB mode.
VOL control fully clockwise.
RF SG setting to 27.186 MHz @ 0.5 uV
MOD to off
L11, L12
Audio output > 2V
S/N 10 dB
LSB Sensitivity
Set radio to CH 19 LSB mode.
VOL control fully clockwise.
RF SG setting to 27.184 MHz @ 0.5 uV
MOD to off
L11, L12
Audio output > 2V
S/N 10 dB
NB Adjust
Set radio to CH 19 AM mode
RF SG setting 27.205 MHz @ 100 uV
MOD 30%, NB/ANL switch on.
Connect Voltmeter to TP1
L1
DC voltage to max.
(>2.0V)
AM Squelch
Set radio to CH 19 AM mode
SQ control at fully clockwise.
RF SG setting 10 mV, MOD 30%
VR4
Slowly
Adjust very slowly
until squelch just
closes
SSB Squelch
Set radio to CH 19 USB mode.
SQ control fully clockwise.
RF SG setting 10 mV
VR3
Slowly
Adjust very slowly
until squelch just
closes
AM S/RF Meter
AM S-Meter
Set radio to CH 19 AM mode.
Meter switch at S/RF position.
RF SG setting to 27.185 MHz @ 100 uV
MOD 30%,
VR1
Meter needle to S9
on the S scale
SSB S-Meter
Set radio to CH 19 USB mode.
S/RF switch at S/RF position.
RF SG setting 27.186 Mhz, MOD off 100 uV
VR2 Meter
needle
to
S9
on the S scale
Figure 4-1 Transmitter test setup
Summary of Contents for DX 949
Page 1: ......
Page 13: ...12 DX 949 CIRCUIT DIAGRAM...
Page 14: ...13 CHAPTER 4...
Page 18: ...17 Figure 4 2 Receiver test setup...
Page 19: ...18 Figure 4 3 Main PCB Adjustment Locations CHAPTER 5...
Page 23: ...22...
Page 29: ...28 DX 949 MAIN PCB REMARK SOLDER SIDE WHITE...
Page 33: ...32...
Page 34: ...33 AT0949040A...
Page 35: ...34...
