Vx-350 Series Vhf Band Service Manual - Vertex Standard VX-350 Series Service Manual

Alignment
( RX T
3. RX S
ENSITIVITY
This parameter is to align the RX BPF (Band Pass Filter) for Rx sensitivity.
1. Set the transceiver to Low Band Edge frequency.
2. Tune the RF signal generator to the same frequency as the
transceiver's, then set the generator output level to +10 dBu
with ±3.0 kHz deviation @ 1 kHz tone modulation.
3. Press the "START" button to start the alignment.
4. Adjust the best sensitivity.
5. Set the transceiver to Band Center frequency.
6. Adjust the best sensitivity; ultimately, the radio should be
aligned so that the RFsignal generator output level is -6 dBu
EMF or less for 12 dB SINAD.
7. Press "OK" button to finish the RX Sensitivity alignment
and save the data.
( SQL )
4. S
QUELCH
This parameter is to align the SQL (Squelch) Sensitivity.
There are several alignments as follows in the Squelch Sensitivity.
Noise SQL Threshold <Wide> "TH NSQ ( W ) ":
Noise SQL Threshold < Narrow > "TH NSQ ( N ) ": The Alignment for the Noise SQL Threshold level at Narrow.
Noise SQL Tight <Wide> "TI NSQ ( W ) ":
Noise SQL Tight <Narrow> "TI NSQ ( N ) ":
RSSI Tight <Wide> "TI RSSI ( W ) ":
RSSI Tight <Narrow> "TI RSSI ( N ) ":
TX Save RSSI <Wide> "TX SAVE ( W ) ":
TX Save RSSI <Narrow> "TX SAVE ( N ) ":
The procedure for all the alignment is as follows.
1. Set the transceiver to Band Center frequency.
2. Press the "START" button to start the alignment.
3. Set the signal generator (±3.0 kHz deviation @ 1 kHz tone
modulation) according to the level indicated (referring to
the table below).
4. Press the "OK" button after finish the alignment, then the
data will be saved and the alignment is
-12 dBu
TH NSQ ( W )
-12 dBu
TH NSQ ( N )
-3 dBu
TI NSQ ( W )
-3 dBu
TI NSQ ( N )
0 dBu
TI RSSI ( W )
0 dBu
TI RSSI ( N )
+15 dBu
TX SAVE ( W )
+15 dBu
TX SAVE ( N )

VX-350 Series VHF Band Service Manual

)
UNE
The Alignment for the Noise SQL Threshold level at Wide.
The Alignment for the Noise SQL Tight level at Wide.
The Alignment for the Noise SQL Tight level at Narrow.
The Alignment for the RSSI Tight level at Wide.
The Alignment for the RSSI Tight level at Narrow.
The Alignment for the TX Save RSSI level at Wide.
The Alignment for the TX Save RSSI level at Narrow.
accomplished.
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