VX-1210
Alignment
4
Transmitter Alignment
TX IF Coils Alignment
r
Remove the coaxial plug from J1004 on the MAIN Unit, then connect the RF millivoltmeter and
50
Ω
resistor to J1004.
r
Connect the AF Generator to pin 4 of the MIC jack.
r
Select the
“
TX IF
”
channel (10.25000 MHz, USB).
r
Inject a signal from the AF Generator to 1500 Hz, then adjust the AF Generator output level so
that the RF millivoltmeter reading is approximately 0 dBm.
r
Key the transmitter (connect pin 5 of the MIC jack to GND), adjust T1010, T1018, T1019,
T1020, and T1022 on the MAIN Unit in succession several times for maximum indication on the
RF millivoltmeter.
r
Disconnect the RF millivoltmeter, and replace the plug into J1004.
MIC Gain Alignment
r
Connect the AF millivoltmeter to TP1003 on the MAIN Unit.
r
Connect the AF Generator to pin 4 of the MIC jack.
r
Select the
“
TX IF
”
channel (10.25000 MHz, USB).
r
Inject a signal from the AF Generator to 1500 Hz, then adjust the AF Generator output level for
8 mV.
r
Key the transmitter (connect pin 5 of the MIC jack to GND), adjust VR1001 on the MAIN Unit
for 30 mV
±
3 mV on the RF millivoltmeter.
Carrier Balance Pre-Alignment
r
Remove the coaxial plug from J1004 on the MAIN Unit, then connect the RF millivoltmeter and
50
Ω
resistor to J1004.
r
Select the
“
TX IF
”
channel (10.25000 MHz, USB).
r
Key the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, adjust
TC1002 and VR1003 on the MAIN Unit for minimum indication on the RF millivoltmeter.
r
Disconnect the RF millivoltmeter, and replace the plug into J1004.
Driver Section Idling Current Alignment
r
Remove the Short-plug from J3505 on the PA Unit, then connect the DC Ammeter to J3505 (pin
1:
“–”
lead, pin 2:
“
+
”
lead).
r
Select the
“
TX IF
”
channel (10.25000 MHz, USB).
r
Key the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, adjust
VR3501 on the PA Unit for 50 mA
±
5 mA on the DC Ammeter.
r
Disconnect the DC Ammeter, and replace the Short-plug into J3505.
Final Section Idling Current Alignment
r
Remove the Solder jumper from JP3501 on the PA Unit, and connect the DC Ammeter to J3506
(pin 1:
“–”
lead, pin 2:
“
+
”
lead) on the PA Unit.
r
Select the
“
TX IF
”
channel (10.25000 MHz, USB).
r
Key the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, adjust
VR3502 on the PA Unit for 100 mA
±
10 mA on the DC Ammeter.
r
Disconnect the DC Ammeter, and connect JP3501 by solder jumper.
CM Coupler Balance
r
Connect the 50
Ω
Dummy Load and Inline Wattmeter to the ANT jack, then connect the AF
Generator to pin 4 of the MIC jack, and adjust the AF Generator to 1500 Hz.
r
Connect the DC voltmeter to pin 3 of JP3003 (
“
+
”
lead,
“–”
lead: GND) on the CNTL Unit.
r
Select the
“
CM BAL
”
channel (29.9000 MHz, USB).
r
Key the transmitter (connect pin 5 of the MIC jack to GND), then adjust the AF Generator
