
TC-500 Service Manual
60
Receiver: (Enter the manual adjust mode)
Item
Condition
Measurement
Adjustment
Specifications
/Remarks
Test Instrument Terminal Part
Method
4.Band
Pass Filter
1. RX Center. Turn
to CH13 in manual
adjust mode.
Scanner
ANT.
TP2
TC3
TC4
TC5
Adjust the
waveform to the
top, and the top is
flat, the
bandwidth is
about 20MHz, the
sign of RX central
frequency is at
the middle of the
waveform.
5.sensitivity
1. RX Center. Turn
to CH13 in manual
adjust mode (long
press
MONI
key to
switch N/W).
Radio
Communication
Test Set
-118dBm
MOD:1KHz
DEV:±3kHz
(Wide)
±1.5kHz
(Narrow)
FILER: 0.3-3.4kHz
ANT
Speaker
Jack
Check
SINAD: 12dB
or higher
2. RX Low. Turn to
CH14 in manual
adjust mode (long
press
MONI
key to
switch N/W).
3.RX High. Turn to
CH15 in manual
adjust mode (long
press
MONI
key to
switch N/W).
6.Squelch
1. RX Center. Turn
to CH2 in manual
adjust mode. Adjust
by pressing
PTT
or
MONI
.
Radio Communic
-ation Test Set
SSG output:
-117dBm
ANT
Speaker
Jack
Level 9
Adjust to just
close the squelch.
Adjust squelch
level 9
2.RX Center. Turn
to CH3 in manual
adjust mode. Adjust
by pressing
PTT
or
MONI
.
Radio Communic
-ation Test Set
SSG output:
-125dBm
Level 3
Adjust to just
close the squelch.
Adjust squelch
level 3
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