PT6808 Service Manual
icon displays when select narrow band)
5. HRSSI check
In the tuning mode (press Key A on hand MIC to turn on the radio), press Key B or C to enter
the item you want to adjust, and press Key D to save the data. Press Key 7 to turn on pre-emphasis,
“SVC” displays on the LCD.
Signal source output: -70dBm.
A. Narrow band (N): When the signal is output, press the Encoder Button, and then press Key D to
save the data.
(Numeric key 1, 2, 3 correspond to high, intermediate and low frequency point)
B. Wide band (W): When the signal is output, press the Encoder Button, and then press Key D to
save the data.
(Numeric key 1, 2, 3 correspond to high, intermediate and low frequency point)
Wide/narrow switch—press the “MONI” key on the panel (Display “W” when select wide band, no
icon displays when select narrow band)
The following parameters need to be tested in the test mode:
Rx part
1. Sensitivity:
≤
0.28
μ
V (Wide band),
≤
0.35
μ
V(Narrow band)
High, intermediate, and low frequency point
12dB SINAD
MOD.: 1kHz
DEV.: ±3kHz (Wide band), ±1.5kHz (Narrow band)
2. Distortion: half distortion
≤
5%, Max. Distortion
≤
20%.
8
Ω
speaker, output audio power 2000mW
MOD.: 1KHz
DEV.: ±3kHz (Wide band), ±1.5kHz (Narrow band)
3. Current
a. Static current
≤
400mA
The voice volume adjusts to the smallest. All LED indicators light off. Squelch is off.
b. Audio power is 2000mW, the current is
≤
1000mA.
4. Audio response: +2dB/-6dB
5. Adjacent channel selectivity:
≥
70dB (wideband)/
≥
65dB (narrowband)
6. Intermodulation suppression:
≥
70dB (wideband)/
≥
65dB (narrowband)
7. Parasitic suppression:
≥
70dB
