TP660 Service Manual
Squelch
level9 on
1. Enter the computer modulation mode.
2. Set the channel as current test frequency.
3. Enter the modulation mode ”SQL9 on”, click start and switch to
the next frequency when the number is stable.
4. Adjust frequency 1
、
3
、
5
、
7
、
9
、
one by turns.
Input -115dBm to
turn it on,-120dm
to turn it off
Squelch
level9 off
1. Enter the computer modulation mode.
2. Set the channel as current test frequency.
3. Enter the modulation mode ” SQL9 off ”
, click start and switch to the next frequency when the number is
stable.
.4. Adjust frequency 1
、
3
、
5
、
7
、
9
、
one by turns.
Squelch
level1 on
1. Enter the computer modulation mode.
2. Set the channel as current test frequency.
3. Enter the modulation mode ”SQL1 on ”, click start and switch
to the next frequency when the number is stable.
4. Adjust frequency 1
、
3
、
5
、
7
、
9
、
one by turns.
Input -115dBm
and turn
on,-120dm and
turn off
Squelch
level1 off
1. Enter the computer modulation mode.
2. Set the channel as current test frequency.
3. Enter the modulation mode ” SQL1 off ”
”, click start and switch to the next frequency when the number is
stable.
4. Adjust frequency 1
、
3
、
5
、
7
、
9
、
one by turns.
Rx
Distortion
Observe SNR form value.
＜
3% (4 bars)
Rx SNR
Observe SNR form value.
CTCSS/CDC
SS Decoding
Decoded
successfully and
no interrupter
BER Test
1.Set the output of 3920 as -118dBm.
2.Enter bit error rate test item; click start and observe bit error
rate.
EER≤5%
7. Technical Functions and Index
General Specification
Frequency Range
UHF1: 400-470MHz VHF
：
136-174MHz
Channel Capacity
1000
Channel Spacing
12.5kHz/25kHz
Weight
280 kg
（
with battery and antenna
）
Page 22 of 65
Summary of Contents for TP660
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