HYT TC-618, Service Manual

Page: 82 / 110

TC-618/626 Service Manual
81
Communication
Test Set
SSG: -123dBm
MOD: 1KHz
DEV: 1.5KHz
Filter:
0.3~3KHz
Squelch
level(1):
-123±1dB
Communication
Test Set
SSG: -120dBm
MOD: 1KHz
DEV: 1.5KHz
Filter:
0.3~3KHz
Squelch
level(5):
-120±1dB
Squelch
Off
Narrow
Bandwidth
Long press
PTT on the
above
channels to
enter the
narrow
bandwidth.
Press SK1 or
SK2 to enable
this function,
and short
press
PTT to
switch
between
frequencies.
Communication
Test Set
SSG: -115dBm
MOD: 1KHz
DEV: 1.5KHz
Filter:
0.3~3KHz
Antenna
Earpiece
Jack
SK1
SK2
Adjust the
SSG output
signal to
squelch
level. Rotate
the
Channel
Selector
Knob to
save the
value after
five-point
adjustment.
Squelch
level(9):
-115±1dB
RX Low
Voltage
Threshold
Digital
Voltmeter
Power
Supply
Port
Power
Supply
Adjust the
output
voltage and
check the
emergency
level (red
LED flashes
and alert
tone
sounds).
≤ 6.50V
Appendix 1: Reference Value for TC-618/626 Source Radio
Wide Bandwidth Narrow Bandwidth
Test Item Freq.
1
Freq.
2
Freq.
3
Freq.
4
Freq.
5
Freq.
1
Freq.
2
Freq.
3
Freq.
4
Freq
.5
Preset Tx Power 446
Tx Low Power 742 714 692 676 672
Tx High Power 1111 1076 1055 1047 1072
CDCSS Deviation 66 67 67 67 69 38 38 39 40 39
CTCSS Deviation
(67Hz)
121 125 128 131 135 69 72 72 75 77
CTCSS Deviation
(151.8Hz)
121 124 126 128 131 68 70 72 73 75
CTCSS Deviation
(254.1Hz)
133 135 137 140 143 75 77 78 78 81
VOX Level 1 55
VOX Level 2 45
VOX Level 3 25
VOX Level 4 19
VOX Level 5 15