Icom IC-730 Maintenance Manual page 6

In the transmit mode the meter has two functions which are
selected by the Meter Switch (18). They are as follows:
Po; Indicates the relative output power. SWR can be measured
by placing the switch located inside the top cover to the SWR
position.
ALC; I n this position the meter functions when the RF output
reaches a certain level.
18. METER SWITCH
Selects meter function in the transmit mode.
19. TRANSMIT INDICATOR
Illuminates when the transceiver is in the transmit mode.
20. FREOUENCY DISPLAY
The frequency of the IC-730 is displayed on a luminescent
display tube. Since the 1MHz and 1KHz decimal points are
displayed, the frequency can easily be read. The frequencies
indicated are the carrier frequencies of each mode in AM, USB,
LSB and CW.
Remember, if you turn the RIT SWITCH ON to change the
receive frequency and rotate the RIT CONTR OL knob, the
frequency displayed will not change.
21. NORMAL/SPLIT (TRANSCEIVE/SPLIT) SWITCH Selects
the relationship of the two VFO's. In the NORM (out) position,
one VFO is for both transmit and receive. In the SPT (in)
position, one VFO is for transmit and the other is for receive.
22. VFO SWITCH
You can select either of the built-in two VFO's with this switch. It
also selects the relationship of the two V FO's with the
NORMAL/SPLIT switch. The switch performs the following
operations according to its position.
A. (NORMAL) Selects the "A" V FO for both transmit and
receive.
A. (SPLIT) Selects "A" V FO for receive and "B" V FO
for transmit.
B. (NORMAL) Selects the "B" VFO in both transmit
and
receive.
B. (SPLIT) Selects "B" VFO for receive and "A"
VFO for transmit.
23. TUNING RATE SWITCHES
The small vernier marks on the tuning knob are
changed to correspond to 10Hz, 1OOHz or.1K Hz steps
which is selected by pushing the switch either 10Hz,
100Hz or 1K Hz.
24. DI AL LOCK SWITCH
After the I C-730 is set to a certain frequency for rag
chewing, mobile 'Operation, etc., push the DIAL LOCK
switch the VFO is electronically locked at the displayed
frequency, thus inactivating he operation of the tuning
knob. To change frequency, the dial lock must first be
disengaged by pushing and releasing the D I AL LOCK
switch again.
25. R IT SWITCH
Switches the R IT circuit ON and OF F.
26. R IT CONTROL
Shifts the receive frequency ±800Hz either side of the
transmit frequency. When the RIT is ON, the RIT INDICATOR is
illuminated. Rotating the control to the (+) side raises the
receive frequency, and rotating to the (-) side lowers the
receive frequency. The f requency shift by tuning the RIT
Control is not indicated on the frequency display.
27. R IT INDICATOR
Illuminates when RIT is turned ON.
28. BAND SWITCH
The BAND SWITCH is an 11 position rotary switch used for
selecting one of the 5 00KHz segments. The selectable bands
are 3.5KHz, 7MHz, 10MHz, 14MHz, 18MHz, 21MHz, 24MHz
and 28MHz. (28MHz band is separated to four 500KHz
segments.)
29. PASS-BAND SHI FT (TUNING) CONTROL
Allows continuous shifting of the pass-band from upper or
lower side i n SSB and ON. This will reduce interference by
a nearby signal. When the optional crystal filter F L-30 is
installed, this control allows continuous tuning of the pass-
band selectivity by moving the filter up to 800Hz from the
upper or lower side in SSB and CW. Not only improves
selectivity, but also can improve the audio tone. Normal
position is in the center position and is 2.4K Hz wide in SSB.
30. SPEECH PROCESSOR SWITCH
Switches the speech processor circuit ON and OFF. This
circuit enables greater talk power and better results in DX
operation.
31. SWR SWITCH
When measuring SWR, calibration SET and SWR reading
f unctions are selected with this switch. When reading SWR
make sure the METER switch on the front panel is in the RF
position.
32. SWR SET CONTROL
This control calibrates the meter needle to the SWR SET
position when you want to determine the value of SWR.
The METER switch must be in the RF position and the set
must be transmitting a carrier.
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