HYT TC-508, Service Manual

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TC-508 Service Manual
6
The LED solidly glows green during RX group tuning (CH10 to CH13).
The LED goes out upon invalid items (CH14 to CH16).
4. To switch between wide and narrow band
Under a certain tuning item, long press the
PTT
key (the LED flashes orange to indicate valid press) to
switch between wide and narrow bands. After the band is selected, the first frequency of the current
band is the frequency for tuning by default.
5. To switch the frequency
Under a certain band, short press the
PTT
key (the LED flashes green to indicate valid press) to switch
the frequency orderly .
6. To tune the value
Under a certain band, short press the
SK1
key to increase the value in step of 1, or hold down this key to
increase the value continuously in steps of 1. The value will remain unchanged once it reaches the
allowed maximum value.
Short press the
SK2
key to decrease the value in step of 1, or hold down this key to decrease the value
continuously in steps of 1. The value will remain unchanged once it reaches the allowed minimum value.
7. About several special items
TX group: CH8 represents TX Low Voltage Threshold, which is related to AD sampling. Press the
SK1
or
SK2
key after entering the above item, to activate AD sampling (including calculation) once.
Rotate the
Channel Selector
knob to save the current AD sampling value.
RX group:CH10 to CH12 represent SQL Normal Open, SQL Normal Close and RX Low Voltage
Threshold respectively, which are related to AD sampling. Press the
SK1
or
SK2
key after
entering the above items, to activate AD sampling (including calculation) once. Rotate the
Channel Selector
knob to save the current AD sampling value.
8. About the Key-press
Short press: key-press time shorter than 1 second;
Long press: key-press time longer than 1 second.