Icom IC-718 - Page 18

14
BASIC MANUAL
4
RECEIVING AND TRANSMITTING
Selecting the IF lter
D Setting the lter
The optional lter is not selected by default.
To use an Optional lter, 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 lter
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 lter
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 lter when this item is set
to ON.
L See the lter selection table on the previous page for
details.
• Selecting the Wide or Narrow lter
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 lter, “THU” (Through) selects the 6 kHz
standard lter.
• For the Narrow lter in the AM mode, “NOR” (Normal)
selects the 2.4 kHz standard lter.
6. Repeat steps 4 and 5 to select IF filters in other
operating modes, if desired.
L The lter 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.
Choose the appropriate lter for your operating needs.
To use an Optional lter, you need the following steps:
• Set an IF bandpass width by replacing the short-pin
on the main board.
• Select the proper lter 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.
53A 250 Hz
(Default)
52A 500 Hz
222 1.8 kHz
96 2.8 kHz
257 3.3 kHz
Short-pin
Remove and replace the
short-pin to the desired
bandpass width.
3. Replace the bottom cover and the screws to their
original positions.
After installing the short-pin, select the lter in the
Initial Set mode. Otherwise, the set lter will not
function properly.
CAUTION: DISCONNECT the DC power cable
before performing any work inside the transceiver
to prevent an electrical shock or damage to the
transceiver.
Remove the
9 screws.