User's Manual

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3.2 Operation Method
Basic Feature
1. Selectable 22 channel and 38 CTCSS
2. VOX function
3. Key Lock
3.2-1. Channel and CTCSS Code selection mode
- Press the function button once in the standby mode to access a channel and
CTCSS selection mode. The flashing channel number appears on the
display. Press the Up or Down button to select the desired channel.
- Press the Power/Shift button to select the CTCSS 2-Digit code position
which flashes. Press the up or down button to select the desired sub-code.
3.2-2. VOX selection mode
- Press the function key in the Scan selection mode to access VOX
selection mode and VOX option appears flashing.
- When VOX function operates, VOX icon appears.
- Press the Power/Shift button in VOX option mode to access the VOX
recovery time selection mode. Select the desired VOX recovery time out of
1,2,3,5 seconds by using the up or down button.
- This features allows the response time characteristics of the VOX function
to be precisely adjusted to suit individual needs.
- When the unit is receiving a signal, VOX function does not operate.
- To turn off VOX feature, enter the VOX selection mode and then select OFF.
.
4. ADJUSTMENT
4-1. Frequency synthesizer
a) After connecting the power meter and dummy load(50 ohm), join the
antenna connector of ATT-655LE with above equipment.
b) Check the voltage between RF BOARD BT POINT & GND in digital volt
meter
c) Then set the low channel of ATT-655LE the lowest frequency.
d) After pressed PTT key of ATT-655LE, check if the lowest frequency of
Tx channel to DC 1.5V in the voltage of test point(VT).
e) After releasing the PTT key of ATT-655LE, check if the highest frequency
of Rx channel is within DC 1.0V in the voltage of test point(VT).