Section 3. Operation - Kenwood AT-120 Operating Manual

CUTE EL
2
Measuring antenna system SWR
(i) Using an all solid-state transceiver (such as a
TS-120S or TS-120 V)
Before setting -up the antenna coupler, first
determine the antenna system SWR.
a. Set the controls as shown in Figure 5. Set the
BAND switch to the '' THROUGH" position.
b. In the transmit mode, calibrate the meter with
the calibration control.
NOTE: In the event of too high an SWR (over
10:1), check the antenna system for
breaks or a short circuit.
SECTION 3. OPERATION
(ii) Using a tube power amplifier transceiver (such
as a TS-820)
Connect the dummy load to the ANT connector
and adjust the (transceiver or transmitter) final
tuning. Then, replace the dummy load with the
antenna and measure the antenna-system SWR.
NOTE: During antenna measurements, your
transceiver may be operating unde~
heavy loading conditions. w
Your signal may also interfere with
other stations. Complete measurements
as quickly as possible.
Coax.
TS-120 or other
TOT TT
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Ground lead
Figure 6.
BAND R TUNE
1152 35 10 CAL 7 4
Ee ant
THROUGH 28
ANTENNA
Switch out set
CAL ( fp) control
Figure 5. Connection