Measuring Swr; Dspot Measurement - Icom IC-705 Advanced Manual

9. OTHER FUNCTIONS

Measuring SWR

The transceiver has a high-performance SWR
meter. This meter displays a stable measurement
in real time, even if the transmit output power
varies frequently.
There are 2 ways to measure SWR. One way
is a spot measurement, and the other is a plot
measurement.
LWhen you measure the SWR of an antenna itself,
turn OFF any connected antenna tuner.

DSpot measurement

1. Turn OFF any connected antenna tuner.
LPerform this step if an antenna tuner is
connected, and you want to measure the SWR
of the antenna itself.
2. Set the desired frequency band and a
frequency in the portion of the band that you
use the most.
3. Select the RTTY mode.
4. Set the RF power to more than 5 W.
5. Touch the TX meter several times until the
SWR meter is displayed.
"SWR" is displayed.
NOTE: Before transmitting, monitor the
operating frequency to make sure you will not
cause interference to other stations on the same
frequency.
6. Hold down [PTT] to transmit, and then read
the SWR on the meter.
The best match is within this range.
(1.5 or less)
LIf the SWR meter indicates 1.5 or less, the
antenna is matched.
LIf the SWR is a high value, adjust your antenna.
7. Release [PTT] to stop transmitting.
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