TC-508 Service Manual
77
value, finally
rotate the
Channel
Selector
knob
to save it.
given with
red LED
flashing.
RX
Sensitivity
(Bandpass)
Wid
e
Ban
d
Set
to
CH13
(low
frequency).
Communicati
on test set
SSG:
-119dBm
MOD: 1KHz
DEV: 3.0KHz
Filter: 0.3 -
3KHz
Antenna
connector
Accessor
y Jack
SK1
SK2
Check the
bandpass
waveform,
and use
SK1
and
SK2
to
perform
tuning. After
three-point
tuning is
completed,
rotate the
Channel
Selector
knob to save.
Rotate the
Volume
Control
knob to a
proper
location
until the
output
amplitude
is not
limited.
SINAD:
≥
12dB
Short press
PTT
to
switch among different
frequencies (low,
medium and high).
Appendix 1:
Reference Value for Source Radio
Test Item
Wide Band
Narrow Band
Freq. 1
Freq. 2
Freq. 3
Freq. 1
Freq. 2
Freq. 3
TX Low Power
38
40
39
/
/
/
TX High Power
83
81
83
/
/
/
CDCSS Balance
Dependent on the waveform.
CDCSS Deviation
87
85
87
50
51
52
CTCSS Deviation (67Hz)
119
120
119
75
72
71
CTCSS Deviation (151.4Hz)
121
123
135
73
71
80
CTCSS Deviation (254.1Hz)
133
135
137
79
83
89
TX Low Voltage Threshold
173
173
Max. TX Audio Deviation
126
128
136
58
60
63
SQL Normal Open
39
40
43
31
32
35
SQL Normal Close
53
51
55
46
45
45
RX Low Voltage Threshold
186
186
Bandpass Filter
76
123
173
/
/
/
Note: The value is subject to that of the source radio.
Summary of Contents for TC-508
Page 1: ......
Page 88: ...TC 508 Service Manual 86 Packing Guide ...
Page 89: ......
Page 90: ......
Page 91: ......
Page 92: ......
Page 102: ...8130050800100 ...
