Operation Manual

7-8
7
FUNCTIONS FOR RECEIVE
• When selecting “1.2 k” Roofing filter
• In the Filter calibration mode
(Automatic adjustment)
Blinks
 IF filter selection (Continued)
D
1.2 kHz Filter calibration
This transceiver has the 1.2 kHz Optimum Roofing
Filter operating at 64 MHz. The characteristic of this
Roofing Filter may slightly vary, depending on the op-
erating environment or after long usage. You can ad-
just it in the Filter calibration mode.
You can automatically or manually adjust the filter.
Automatic adjustment
q Hold down [FILTER] for 1 second.
• The Filter screen is displayed.
w Select the desired mode.
e Push [ROOFING](F) several times to select ‘1.2k.’
• ‘15k,’ ‘6k,’ ‘3k,’ and ‘1.2k’ are selectable.
r Push [ADJ](F).
• Enters the Filter calibration mode.
t Hold down [CAL](F) for 1 second to start the auto-
matic adjustment.
• “CAL” blinks.
• When the adjustment is successful, two beeps sound.
• If the adjustment fails, an error beep sounds.
y Push [ADJ](F).
• Exits the Filter calibration mode.
Manual adjustment
q Hold down [FILTER] for 1 second.
• The Filter screen is displayed.
w Select the desired mode.
e Push [ROOFING](F) several times to select ‘1.2k.’
• ‘15k,’ ‘6k,’ ‘3k,’ and ‘1.2k’ are selectable.
r Push [ADJ](F).
• Enters the Filter calibration mode.
t Rotate [MAIN DIAL] to adjust.
• The adjustable values are between 0% and 100%.
(±1100 Hz of the set value in 5 Hz steps)
• Adjust the appropriate value so that you can easily hear
a desired signal and undesired signals are reduced.
y Push [ADJ](F).
• Exits the Filter calibration mode.
• In the Filter calibration mode
(Manual adjustment)