HYT TC-700P, Service Manual

Page: 69 / 100

TC-700P Service Manual
69
(2) Receiver Tuning
No. Items
(second
group)
Condition Test
Instrument
Method Purpose
1 RX
Sensitivity
Enter tuning mode,
select channel 1 for the
second group and make
5-point tunings of Wide
band.
PTT: increase
SK1: decrease
When level is
tuned to -119dBm,
SINAD ≥ 12dB.
2 AK2346 RX
Volume
Enter tuning mode,
select channel 2 for the
second group and make
1-point tunings of Wide
band.
PTT: increase
SK1: decrease
When the volume
is maximized, the
DC level is
adjusted to 1.6
W±0.2W
(20ohms),
single-path DC
input level is
adjusted to
2.8V±0.2V;
while dual-path
DC input level is
adjusted to
5.6V±0.2V.
3 Sql 3 Level
Open
Enter tuning mode,
select channel 3 for the
second group and make
5-point tunings of Wide
band, 1-point tunings of
Medium band and
5-point tunings of
Narrow band.
Communicatio
n Test Set
RX TEST
HPF: 300Hz
LPF: 3KHz
PTT: save When the level is
adjusted to
-122dBm, press
PTT to save the
current value.