Standard Horizon MATRIX GX3000S, Service Manual

Page: 14 / 54

14
Alignment
Software Alignment/Confirmation Mode
The “Software Alignment/Confirmation Mode” has been
build in the microprocessor in order to adjust and con-
firm the performance of transceiver.
The purpose is to adjust transceiver simply and to con-
firm the performance of transceiver smoothly.
S
TARTING
S
OFTWARE
A
LIGNMENT
M
ODE
Confirm that the transceiver’s power is turned off.
Short the TEST points (JP1001).
Press and hold the VOL/PWR knob until the radio
turns on while press and holding the [ CALL
(
MENU
)]
and [ DISTRESS
] keys. The LCD
will be as shown in the illustration
at the right.
Squelch Adjustment
Setup the test equipment as shown below.
S
TARTING
S
OFTWARE
C
ONFIRMATION
M
ODE
Confirm that the transceiver’s power is turned off.
Short the TEST points (JP1001).
Press and hold the VOL/PWR knob until the radio
turns on while press and holding the [ DW
(
IC
)] and
[
DISTRESS
] keys. Release the keys,
the LCD will be as shown for one
second in the illustration at the
right.
DSC Encoder Confirmation
Press the [ SCAN
(
MEM
)] key to re-
call the Alignment Item “ 04:
THRESHOLD
.”
Set the RF Signal Generator output to 156.800 MHz,
at a level of –10 dBµV, ±3.0 kHz deviation with a 1
kHz audio tone.
Press the [ DW
(
IC
)] key.
Press the [ ENT
] key to save the new setting.
Press the [ SCAN
(
MEM
)] key to re-
call the Alignment Item “
05: TIGHT
.”
Set the RF Signal Generator output
to 156.800 MHz, at a level of +2 dBµ ±3.0 kHz devia-
tion with a 1 kHz audio tone.
Press the [ DW
(
IC
)] key.
Press the [ ENT
] key to save the new setting.
Press the [ SCAN
(
MEM
)] key to re-
call the Alignment Item “
07: DC
VOLT .”
Set the DC Power Supply to 13.8 V.
Press the [ DW
(
IC
)] key.
Press the [ ENT
] key to save the new setting.
This completes the Software Alignment Mode. To save
all settings and exit, press and hold the [
DISTRESS
] key
for 2 seconds.
Setup the test equipment as shown below.
Set the channel to CH70.
Press the PTT switch, confirm that the first tone de-
viation is 4.2 kHz ±0.3 kHz.
Note : In CH70 while Software Confirmation Mode,
ever time you are in transmit mode, (every time you
press PTT), the following test tone can be outputted:
1st transmission:
Synthetic tone of 1300 Hz and 2100 Hz
2nd transmission: 1300 Hz
3rd transmission: 2100 Hz
4th transmission: No Modulation
5th transmission: Return to 1st transmission
This completes the Software Alignment/Confirmation
Mode. Turn the transceiver’s power off, then disconnect
the Jumper from the TEST points (JP1001).
RF Signal
Generator
ANT
GX3000S
Deviation
Meter
50-ohm
Dummy Load
Sampling
Coupler
ANT
GX3000S