Transmitter Alignment - Galaxy DX 959 Service Manual

4.1.2 TRANSMITTER ALIGNMENT

ITEM U.U.T. SETTING
BIAS Current Set radio to CH 19 USB TX mode. MOD off.
Connect current meter to TP7 (+) and TP9 (-)
Connect current meter to TP7 (+) and TP8 (-)
SSB TX Power Set radio to CH 19, USB TX mode.
Connect "short PCB" to TP7 and TP9.
Connect RF power meter to antenna jack.
AF signal 30 mV, 1 KHz to microphone.
SSB ALC Set radio to CH 19, USB TX mode.
AF signal 30mV, 1KHz to microphone.
SSB Carrier Mic Gain off, CH19 USB TX mode.
Balance Connect scope to antenna connector.
SSB APC Set radio to CH 19, USB mode.
MOD off. Connect Voltmeter to TP7.
AM TX Power Set radio to CH 19 AM TX mode.
No MOD.
RF Power Set radio to CH 19 AM TX mode. Mod off.
Meter
AM Set radio to CH 19 TX mode.
Modulation Audio signal 30 mV, 1 KHz to microphone
Set Mic Gain fully clockwise.
Frequency Set radio to CH 19 RX mode. Set clarifier to
Counter Adjust 12 o'clock position. Set display to "ON". Set
dimmer control fully clockwise.
ADJUST
POINT
VR12
VR10
L40, L42,
L43, L44
L40, L42
VR13
VR6
VR17
VR14
VR9
VR16
VC1 on
frequency
counter.
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MEASUREMENT
50 mA
100 mA
MAX =12W
Spurious emission
Min.
Balance Power
Between CH1 and
CH40.
11.5 W
Spurious Emission
to minimum.
DC12.5V
3.8W
Adjust RF Power
meter to "4" on
PWR scale.
90%
Display should be
27.185