5-3
VX-4000 VHF Low-band Service Manual
Alignment
Transmitter Output Power
The following transmitter parameters can be ad-
justed from the computer by utilizing the Alignment
Software. Refer to the onboard help of the Align-
ment Software Manual for details.
r
Select the band center frequency channel, and se-
lect the “high” power output level.
Key the transmitter and adjust (by control com-
mands from the computer) for a power output of
70 Watts (± 1 W) as indicated on the wattmeter.
r
Stay on the band center frequency channel, and
select the “low” power output level.
Key the transmitter and adjust (by control com-
mands from the computer) for a power level of
30 Watts (± 0.5 W) as indicated on the wattmeter.
Transmitter Deviation
The following modulation parameters can be ad-
justed from the computer by utilizing the Alignment
Software. Refer to the onboard help of the Align-
ment Software Manual for details.
Microphone Audio Modulation Level
r
Select the band center frequency channel, and ad-
just the AF generator for 50mV (–30dBm) output
at 1 kHz, as applied to the microphone jack.
r
Key the transmitter and adjust (by control com-
mands from the computer) for maximum devia-
tion of ±4.2 kHz (± 0.1 kHz) as indicated on the
deviation meter.
TP1007
L1021
L1022 TC1001
Summary of Contents for VX-4000L
Page 13: ...1 12 VX 4000 VHF Low band Service Manual Note ...
Page 17: ...VX 4000 VHF Low band Service Manual 3 2 Block Diagram ...
Page 18: ...VX 4000 VHF Low band Service Manual 3 3 Block Diagram ...
Page 19: ...VX 4000 VHF Low band Service Manual 3 4 Interconnection Diagram ...
Page 30: ...VX 4000 VHF Low band Service Manual 6A 5 MAIN Unit Lot 8 Circuit Diagram ...
Page 31: ...VX 4000 VHF Low band Service Manual 6A 6 MAIN Unit Lot 8 ...
Page 55: ...VX 4000 VHF Low band Service Manual MAIN Unit Note ...
Page 57: ...VX 4000 VHF Low band Service Manual 6B 2 DISPLAY Unit Note ...
Page 65: ...6B 10 VX 4000 VHF Low band Service Manual DISPLAY Unit Note ...
Page 67: ...VX 4000 VHF Low band Service Manual 6C 2 KEY Unit Note ...
Page 69: ...6C 4 VX 4000 VHF Low band Service Manual KEY Unit Note ...