Tuning In The Mode - HYT POWER446 Service Manual

(2) Tuning in the mode (Note: Make sure that the antenna or load is connected before tuning.)
Item
Set to CH4 and
hold down PTT to
enable
function at low
frequency.
High
Short press PTT
to
frequencies
(refer to the table
TX of Tuning Items).
Power
Set to CH2 and
hold down PTT to
enable
function at low
frequency.
Low
Short press PTT
to
frequencies
(refer to the table
of Tuning Items).
Set to CH5 and
hold down PTT to
enable
CDCSS function at low
Waveform frequency. Short
press
switch
frequencies.
Set to CH5 and
hold down PTT to
enable this
CDCSS function at low
Deviation frequency. Short
press PTT to
switch
frequencies.
Measurement
Condition
Test
Instrument
this
switch
Communicatio
n Test Set
Ammeter
this
switch
this
to
PTT
Communicatio
n Test Set
BPF:
<20Hz~300Hz
POWER446 Service Manual
Tuning
Test
Part
Point
Antenna SK1
Connector SK2
VR260
Antenna
VR601
SK1
SK2
37
Specifications
/Remarks
Method
Press SK1 or 4-4.3W
SK2 to tune I≤1.4A
the output
power, and
rotate the
Channel
Selector knob
to save it.
Press SK1 or 0.5W±0.1W
SK2 to tune I≤0.8A
the output
power, and
rotate the
Channel
Selector knob
to save it.
Tune VR260
with ceramic
tuning tool and
make the
waveform
similar to
square
waveform.
Enter the
Tuning Mode if
necessary, and
press SK1 or
350~600Hz(38
SK2 to make
slight tuning 0~420Hz is
untilthe recommended)
CDCSS
deviation
meets the
requirements.