VX-261 VHF FM Transceiver Service Manual
10
Alignment
1. PLL Reference Frequency (Frequency)
This parameter align the reference frequency for PLL.
1. Press the “Frequency” button to open the “Frequency Align-
ment” window.
2. Click the “PTT” button to transmit the radio on the center fre-
quency channel.
3. Set the value to get the desired frequency according to the
following ways:
Dragging the slide bar
Clicking the arrow buttons
Pressing the left/right arrow key of the computer’s key-
board
Entering the value (“000” - “255”) in the “Data” box from
the computer’s keyboard
4. After getting the desired frequency, click the “PTT” button to
stop transmitting.
5. Click the “OK” button to finish the frequency alignment and
save the data.
2. RX Sensitivity (RX Tune)
This parameter align the RX BPF (Band Pass Filter) for Receive (RX) sensitivity.
The PLL Reference Frequency (Frequency) alignment must be done before this alignment is performed.
1. Press the “RX Tune” button to open the “RX Sensitivity
Alignment” window will appear.
2. Click the slide bar of the desired channel. The radio switches
to the selected channel.
3. Set the RF Signal Generator according to the indication at the
top of the screen (Setting Your SG as followings).
4. Set the value to get the best RX sensitivity (Highest RSSI
value) according to the following ways:
Dragging the slide bar
Clicking the arrow buttons
Pressing the left/right arrow key of the computer’s key-
board
Entering the value (“000” - “255”) in the “Data” box from
the computer’s keyboard
5. Click the “OK” button to finish the RX Sensitivity alignment
and save the data.
You may select the alignment type from the “Radio” button lo-
cated at the button of the screen (
ADJ Type
), as needed.
Basic
:
“Low Edge / Band Center/ High Edge” and select the
channel for alignment (Default).
Single
: Alignment value changes only on the selected channel.
All Freq
: Alignment value changes on all channels.
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