Kenwood AT-130 manual Interconnection

Measuringantenna system SWR

(i)Using an all solid-state transceiver (such as a TS-130s or TS-130V)

Before setting up the antenna coupler, first determine the antenna system SWR.

a.Set the controls as shown in Figure3-2.Set the BAND switch to the "THROUGH" position.

b.In the transmit mode, calibrate the meter with the calibration control.

c.Depress the CALISWR switch to the SWR (1) position and read SWR. If the SWR is lower than 1.5: 1 the antenna system impedance

is sufficiently matched for practical use. If above 1.5: 1, tune the system.

NOTE: In the event of too high an SWR (over

10:I),check the antenna system for breaks or a short circuit.

(ii)Using a tube power amplifier transceiver (such as a TS-820)

Connect the transceiver (or transmitter) and dummy load (or antenna) through the AT-130as shown in Figure 3-3. Before adjusting the antenna coupler, you should first know the antenna sys- tem SWR.

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-systemSWR.

NOTE: During antenna measurements, your transceiver may be operating under heavy loading conditions.

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Your signal may also interfere with other stations. Use the least amount of power possible, and complete measure- ments as quickly as possible.

Coax.

T

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Ground lead

Figure 3-1. Interconnection

I:

BAND R TUNE

CAL

PULL LAMP @ ANTENNA

k

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Switch out set

CAL ( control

Figure 3-2. Switch Settings

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