HYT TC-268 Service Manual page 60

Adjust the receiver section: (enter manual mode)
Item Condition
1:CH:RX center
turn to channel 4
in manual mode
2. CH: RX LOW
4.Band-pass
turn to channel 5
filter
in manual mode
3.CH:RX HIGH
turn to channel 6
in manual mode
1. CH:RX center
Turn to channel 13
in manual mode
Dev : Wide
2. CH: RX center
Turn to channel 14
5.Sensitivity
in manual mode
(Wide)
Dev : Wide
3. CH: RX center
Turn to channel 15
in manual mode
Dev : Wide
1. CH: RX center
Turn to channel 13
in manual mode
Dev : narrow
2. CH: RX center
6.Sensitivity Turn to channel 14
(Narrow) in manual mode
Dev : narrow
3. CH: RX center
Turn to channel 15
in manual mode
dev : narrow
1.CH: RX center
Turn to channel 7
in manual mode
7.Squelch
2.CH:RX center
Turn to channel 8
in manual mode
Measurement
Termina
Test equip
l
TC201
TC202
(TC-368)
TC203
(TC-368)
PTT(up)
Spectrum ANT .
ONI
analyzer TP2
(down)
PTT(up)
MONI
(down)
Synthetical
test
SSG
output :
ANT
-118dBm
SP
MOD:1kHz
DEV:±3kHz
FILER:
0.3-3.4kHz
Synthetical
test
SSG
output :
ANT
-116dBm
SP
MOD:1kHz
DEV:±1.5kHz
FILER:
0.3-3.4kHz
Synthetical
test
SSG
output :
-117dBm ANT
SP
Synthetical
test
SSG
output :
-125dBm
58
TC-268/368 Service Manual
Adjustment
parts Method
Adjust the undee to the top, the
bandwidth is about 10MHz, the
sign of central frequency is in
the middle of the undee
Adjust the undee to the top to
receive
Low frequency , the sign is on
the left of the top of the undee
Adjust the undee to the top to
receive
High frequency , the sign is on
the right of the top of the undee
check
check
Level 9
Adjust to close the squelch.
PTT(up)
MONI
(down)
Level 3
Adjust to close the squelch.
Specific
ations/R
emarks
SINAD:
12dB or
higher
SINAD:
12dB or
higher
The
squelch
must be
closed
The
squelch
must be
closed