Transmitter Deviation - Vertex Standard VX-6000L Alignment Manual

Transmitter Deviation

Microphone Audio Modulation Level
･ ･ ･ ･ Select band center frequency channel, and adjust the AF generator for 25 mV(-30 dBm)
output at 1 KHz to the microphone jack.
･ ･ ･ ･ Key the transmitter and adjust by control commands for maximum deviation from the
computer for 4.2 KHz ±0.1 KHz 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 0.7 KHz ±0.05 KHz 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 ±3.0 KHz deviation with 1 KHz tone
modulation, and set the output level for 1 µV 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 0.25 µV 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 1 KHz tone modulation, and set
the output level for -8 dBµ 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).
5
FCC ID: K66VX-6000L
Alignment
Vertex Standard Co., Ltd.