HYT TC-580 Service Manual page 12

1. To enter the Manual Tune mode
Hold down PTT and SK1 for 2 seconds while powering on the radio. Then the LCD displays
"Tuning Mode", indicating that the Manual Tune mode has been entered. At this time, release the
keys.
2. To switch the tuning item
After the tuning mode is entered, switch the tuning item using UP or DN key. The LCD displays the
tuning item accordingly. The LED solidly glows red for the TX group items and glows green for the
RX group items.
3. To adjust the value
At a certain frequency, short press SK1 to increase the value in the step of 1; hold down the key to
increase the value continuously in steps of 1.
At a certain frequency, short press SK2 to decrease the value in the step of 1; hold down the key to
decrease the value continuously in steps of 1.
4. To save the value
After the value is set, press UP or DN to switch the frequency, or press OK to save the value.
5. To enter the selected item
Use UP or DN key to choose your desired tuning items, and press OK to enter the item.
6. To return to the previous menu
Short press C to return to the previous menu; and long press C to return to the first level menu.
7. Measures on special items
TX group items: Including the VOX Level 1-5 and TX Low Voltage Threshold. These tuning items
Rx Group Items: Including the SQL On 1, SQL On 5, SQL On 9, SQL Off 1, SQL Off 5, SQL Off 9
are related to AD sampling. Short press SK1 or SK2 after entering the above
items, to activate AD sampling (including calculation) once. Press UP or DN to
switch the frequency and press OK to save the current AD sampling value. If
neither of SK1 or SK2 is pressed, the tuning value will not be updated, and AD
sampling will not be activated.
and Rx Low Voltage Threshold. These tuning items are related to AD sampling.
Short press SK1 or SK2 after entering the above items, to activate AD sampling
(including calculation) once. Press UP or DN to switch the frequency and press
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TC-580 Service Manual