Vertex VX-2100 series, Service Manual

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VX-2100/-2200 (VHF) Service Manual
13
5. Squelch (SQL)
This parameter is to align the SQL (Squelch) Sensitivity. The “RX VCO Tune Voltage”, “PLL Reference Frequency” and
“RX Sensitivity (RX Tune)” must be done before this alignment is started.
There are several alignments as follows in the Squelch Sensitivity.
Noise SQL Tight <Wide> (TH NSQ W) : The Alignment for the Noise SQL Tight level at Wide (5k/4k).
Noise SQL Threshold <Wide> (TH NSQ W) : The Alignment for the Noise SQL Threshold level at Wide (5k/4k).
RSSI SQL Level 11 <Wide> (RSSI SQL W) : The Alignment for the “level 11“ of the RSSI SQL level at Wide (5k/4k).
RSSI SQL Full Scale <Wide> (S Full Scale W) : The Alignment for the RSSI Full Scale level at Wide (5k/4k).
Noise SQL Tight <Narrow> (TI NSQ N) : The Alignment for the Noise SQL Tight level at Narrow (2.5k).
N oise SQL Threshold < Narrow > (TH NSQ N) : The Alignment for the Noise SQL Threshold level at Narrow (2.5k).
RSSI SQL Level 11 < Narrow > (RSSI SQL N) : The Alignment for the “level 11“ of the RSSI SQL level at Narrow (2.5k).
RSSI SQL Full Scale < Narrow > (S Full Scale N) : The Alignment for the RSSI Full Scale levle at Narrow (2.5k).
The procedure for all the alignment is as follows.
1. Press the “Start” button to start the alignment.
2. Set the signal generator according to the level indi-
cated, then press “OK”.
3. Press the “OK” button after finish the alignment, then
the data will be saved and the alignment is accom-
plished.
4. RX Sensitivity (RX Tune)
This parameter is to align the RX BPF (Band Pass Filter) for Rx sensitivity. It must be done both alignments of the “RX
VCO Tune Voltage” and “PLL Reference Frequency” before this alignment is going to start.
1. Press the “Start” button to start the alignment.
2. Set the Signal Generator according to the indication,
then press “OK”.
3. Repeat the procedure no.2 until the 3point alignment
is finished.
4. It will show the result of 3 points alignment and press
“OK” then the confirmation window will open.
5. Press “OK” to finish the RX Sensitivity alignment and
save the data.
Alignment