Cw Operation - Icom IC-735 Instruction Manual

Wiring for a hand key or external electronic keyer.
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Push the CW MODE SELECT SWITCH to operate on CW. The other
controls and switches should be set the same as described for SSB
reception. See page 19 for CW key connections.
6 - 5 - 2 CW OPERATION
(11 CW RECEIVING
1. Push the POWER SWITCH to turn the power ON.
2. Push the CW MODE SWITCH.
3. Set the desired operating frequency.
4. Adjust the AF GAIN CONTROL for a suitable volume.
5. The Passband Tuning system may be used to narrow the receiver
selectivity down to 800Hz with maximum counterclockwise
rotation of the PBT CONTROL, and to 2.3kHz with maximum
clockwise rotation. Additionally, the NOTCH FILTER eliminates
specific interference at discrete frequencies within the passband
of the receiver.
6. If an optional CW narrow filter is installed, push the CW NAR-
ROW SWITCH to select the narrow filter, thereby improving the
receiver selectivity. Selectivity is 500Hz/-6dB with the FL-32A
filter selected, and 250Hz/-6dB with the FL-63A filter. Back-
ground noise is reduced and the signal-to-noise ratio is improved
with the narrow filter, providing more enjoyable listening condi-
tions.
*See page 23 for the optional filter characteristics.
*Receiver audio is muted with neither filter installed.
(2) CW TRANSMITTING
1.
Insert the CW key plug into the KEY JACK on the rear panel of
the IC-735.
2. Place the METER SWITCH in the PO position.
3. Push the XMIT SWITCH to place the transceiver in the transmit
mode.
4. Operate the CW key and note that the meter needle moves in
time with the CW sending. This indicates the CW signal is trans-
mitting.
See next page for automatic keying operation.
5. Adjust the VOX DELAY CONTROL while sending CW so that
the transmit/receive switch does not operate during short pauses.
CW SIDETONE MONITOR
No covers need to be removed to adjust the MONI-
TOR LEVEL CONTROL.
(3)
SEMI/FULL BREAK-IN OPERATION
An 800Hz sidetone oscillator is provided to monitor keying when in
the CW mode. The MONITOR LEVEL CONTROL varies the loud-
ness of the tone. This control is located on the bottom side of the
transceiver. See page 43 for the exact location of the adjustment.
Rotate the MONITOR LEVEL CONTROL clockwise to increase the
loudness of the oscillator tone. The receiver AF GAIN CONTROL
also varies the loudness.
The IC-735 has both semi break-in and full break-in CW capability
when using the VOX function. This means the transmit/receive
switching is performed automatically by the transceiver whenever
the keying starts or stops. The receive to transmit switching time is,
practically speaking, instantaneous whereas the transmit to receive
switching time may be varied by an adjustment to suit an individual's
keying speed.