Cw Narrow Filter - Icom IC-910H Instruction Manual

I FL-132/FL-133
The IC-910H has a CW narrow mode to provide bet-
ter S/N (Signal-to-Noise), or to reject interference. To
operate the CW narrow mode, an optional CW narrow
filter is necessary.
NOTE: For CW narrow mode during satellite opera-
tion, the FL-133 (for SUB band filter) is necessary
since the SUB band circuit is used for receiving, al-
though the MAIN band display shows receive fre-
quency.
FILTER
at –6 dB
Built-in filter 2.3 kHz
FL-132/133 500 Hz
q Remove the bottom cover as shown in the diagram
on p. 71.
• Remove the UX-910 if you have installed it. (p. 73)
w Disconnect the connection cable connectors from
J501 and J1051 on the MAIN unit.
e Remove the 2 clips.
WARNING!
BE CAREFUL not to pinch your finger with the
clip.
r Remove the 6 screws from the MAIN unit, then lift
up the MAIN unit.

CW NARROW FILTER

Passband width
at –60 dB
4.2 kHz
1.34 kHz
From The N3UJJ.COM Document Library From The N3UJJ.COM Document Library
OPTION INSTALLATIONS
PLL unit
MAIN unit
t Install FL-132 or FL-133 to the specified position on
the MAIN unit.
FL-132
(MAIN)
FL-133
(SUB)
y Solder then cut the leads, keeping 2–3 mm (
the leads from the bottom of the MAIN unit.
u Return the MAIN unit and clips to their original posi-
tions.
i Re-connect the connection cable connector to J501
and J1051 on the MAIN unit.
o Return the bottom cover to the original position.
11
J501
J1051
Clips
") of
1 ⁄
8
75