Icom IC-718 Basic Manual page 18

4
RECEIVING AND TRANSMITTING
Selecting the IF filter
Choose the appropriate filter for your operating needs.
To use an Optional filter, you need the following steps:
• Set an IF bandpass width by replacing the short-pin
on the main board.
• Select the proper filter in the Initial Set mode.
D Setting the short-pin
1. Remove the transceiver's bottom cover.
2. Remove the short-pin as shown below, and install
it onto the appropriate pins, according to your
desired bandpass width.
Remove and replace the
short-pin to the desired
bandpass width.
Short-pin
53A 250 Hz
(Default)
52A 500 Hz
222 1.8 kHz
96
257 3.3 kHz
3. Replace the bottom cover and the screws to their
original positions.
After installing the short-pin, select the filter in the
Initial Set mode. Otherwise, the set filter will not
function properly.
14
Remove the
9 screws.
2.8 kHz
CAUTION: DISCONNECT the DC power cable
before performing any work inside the transceiver
to prevent an electrical shock or damage to the
transceiver.
D Setting the filter
The optional filter is not selected by default.
To use an Optional filter, set the items in the Initial Set
mode.
Entering the Initial Set mode
1. Turn OFF the transceiver.
2. While holding down [SET], push [PWR].
• Enters the Initial set mode.
3. When the setting has been finished, push [PWR]
to exit the Initial Set mode and turn OFF the
transceiver.
Selecting an Optional filter
1. In the Initial Set mode, push [UP▲] or [▼DN] to
select "FIL."
2. Rotate [MAIN DIAL] to select a desired filter from
no (None,) 52A, 53A, 96, 222, and 257.
Selecting an Expanded filter
1. In the Initial Set mode, push [UP▲] or [▼DN] to
select "EXP FIL."
2. Rotate [MAIN DIAL] to set the Expanded filter ON
or OFF.
L You can use the expanded filter when this item is set
to ON.
L See the filter selection table on the previous page for
details.
• Selecting the Wide or Narrow filter
3. In the Initial Set mode, push [UP▲] or [▼DN] to
select "WIDE" (Wide) or "NARW" (Narrow).
4. Push [MODE] to select an operating mode.
5. Rotate [MAIN DIAL] to select a filter.
• For the Wide filter, "THU" (Through) selects the 6 kHz
standard filter.
• For the Narrow filter in the AM mode, "NOR" (Normal)
selects the 2.4 kHz standard filter.
6. Repeat steps 4 and 5 to select IF filters in other
operating modes, if desired.
L The filter selection is memorized in each operating
mode.
7. When the setting has been finished, push [PWR]
to exit the Initial Set mode and turn OFF the
transceiver.