Icom IC-475H Instruction Manual page 35

7-11 MICROPHONE UP/DOWN
OPERATION :
UP/DOWN
ON-OFF
SWITCH
(1) Frequency control
(2) Memory channel selection
7-12 SWR READING OPERATION
TX- METER
RF SET SWR
TX- METER
RF SET SWR
(8)
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This up/down function is useful for changing the operating fre-
quency when
using the VFO mode or when using the MEMORY
CHANNEL mode.
Microphone UP/DOWN ON-OFF SWITCHES:
eOFF: The [UP] SWITCH and [DN] (down) SWITCHES on the
microphone are disabled to eliminate the chance of
accidental frequency or memory channel changes.
eON: The [UP] or [DN] SWITCH can be used to change operat-
ing frequencies.
1) Each push of the [UP] or [DN] SWITCH on the supplied micro-
phone changes the operating frequency one increment up or
down, respectively.
2) Holding either switch down changes the operating frequency
continuously in the same manner as the TUNING CONTROL.
1) When using the MEMORY CHANNEL mode, the memory
channel may be changed with the microphone up/down switches.
2) The memory. channel or the displayed memory channel number
change continuously if the microphone switches are held down.
The 1С-475Н has a built-in SWR meter to check antenna matching
as an aid to avoiding problems caused by high SWR.
1) Set the METER SWITCH on the front panel to the [S*RF]
position.
2) Set the [TX-METER] SWITCH on the rear panel to the [SET]
position.
3) Select РМ mode.
4) Rotate the [MIC GAIN] CONTROL fully CCW.
5) Push the [XMIT] SWITCH to the TRANSMIT (IN) position.
7) Set the [TX-METER] SWITCH to "SWR". Read the SWR from
the SWR scale.
8) If the SWR is less than 1.5, the matching condition between the
1С-475Н and your аптеппа is good.
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