Transmitter Output Power (VHF)
Select band center frequency channel, and select high
power output level.
Key the transmitter and adjust by control commands for
high power from the computer for 50 ± 1 Watts as
indicated on the wattmeter.
Select band center frequency channel, and select low
power output level.
Key the transmitter and adjust by control commands for
low power from the computer for 5 ± 0.1 Watts as
indicated on the wattmeter.
Transmitter Output Power (UHF)
Select band center frequency channel, and select high
power output level.
Key the transmitter and adjust by control commands for
high power from the computer for 40 ± 1 Watts as
indicated on the wattmeter.
Select band center frequency channel, and select low
power output level.
Key the transmitter and adjust by control commands for
low power from the computer for 5 ± 0.1 Watts as
indicated on the wattmeter.
Transmitter Deviation
Microphone Audio Modulation Level
Select band center frequency channel, and adjust the AF
generator for 25mV(-30dBm) output at 1 kHz to the
microphone jack.
Key the transmitter and adjust by control commands for
maximum deviation from the computer for 4.2kHz ±
0.05kHz deviation as indicated on the deviation meter.
CTCSS Modulation Level
Select band center frequency channel, with 151.4 Hz
CTCSS encode, and reduce the AF generator injection to
zero.
Key the transmitter and adjust by control commands for
CTCSS deviation from the computer for 0.7kHz ±
0.05kHz deviation as indicated on the deviation meter.
DCS Modulation Level
Select band center frequency channel, with DCS 023
enabled, reduce the AF generator injection to zero.
Key the transmitter and adjust by control commands for
DCS deviation from the computer for 0.7 kHz ± 0.05 kHz
deviation as indicated on the deviation meter.
Receiver
Set up the test equipment as shown for receiver
alignment, and construct the audio test adapter as
described in the box below.
With the transceiver set to band center frequency
channel, and the RF signal generator tuned to the same
frequency, set the generator for ±3.0kHz deviation (for
25kHz steps) with 1kHz tone modulation, and set the
output level for 1µV at the antenna jack.
Adjust by control commands for tune from the computer
for optimum SINAD, reducing signal generator output
level as necessary for proper meter deflection.
After the previous step, final signal generator level should
be less than 0.25µV for 12dB SINAD.
Squelch Threshold
Select band center frequency channel, and the RF signal
generator turned to the same frequency, set the
generator for ±3.0 kHz deviation with 1kHz tone
modulation, and set the output level for -8dBµ at the
antenna jack.
Adjust the squelch threshold level by control commands
for squelch threshold from the computer so that it just
closes (
BUSY
LED turns off).
