Standard Horizon Matrix GX3000E, Service Manual

Page: 12 / 66

12
Alignment
Reference Frequency Adjustment

Setup the test equipment as shown below.

Set the channel to CH16.

Adjust TC1001 so that the DC voltmeter reading is
1.5 V ± 0.1 V.

Set the channel to CH16.

With the PTT switch pressed, adjust TC1002 so that
the DC voltmeter reading is 3.0 V ± 0.1 V.

Release the PTT switch.
Transmit Power Adjustment

Setup the test equipment as shown below.

Set the channel to CH16.

Use the [
H/L
(
NAV
)] key to set the transceiver to
“LOW” power.

With the PTT switch pressed, adjust
TC1003
so that
the Frequency Counter reading is 156.800 MHz ± 100
Hz.

Release the PTT switch.
Receiver VCV Adjustment

Setup the test equipment as shown below.
Transmitter VCV Adjustment

Setup the test equipment as shown below.

Set the channel to CH16.

Use the [
H/L
(
NAV
)] key to set the transceiver to “HI”
power.

With the PTT switch pressed, adjust
VR1001
so that
RF output power is 24 W ± 0.3 W.

Release the PTT switch, then set the transceiver to
“LOW” power by the [
H/L
(
NAV
)] key.

With the PTT switch pressed, adjust
VR1002
so that
RF output power is 0.8 W ±0.1 W.

Release the PTT switch.
RF UNIT A
LIGNMENT
P
OINT
L
1006
L
1007
L
1008
L
1001
TP
1004
VR
1001
VR
1003
VR
1002
VR
1004
TP
1005
JP
1001
TP
1009
TC
1003
L
1003
L
1004
L
1005
TC
1001
TP
1008
TC
1002
GX3000S/E
Frequency
Counter
50-ohm
Dummy Load
Sampling
Coupler
ANT
DC Voltmeter
TP1005
GX3000S/E
50-ohm
Dummy Load
ANT
DC Voltmeter
TP1008
GX3000S/E
50-ohm
Dummy Load
ANT
Inline
Wattmeter
GX3000S/E
L
1002