BASIC OPERATION
6.4
SET
Operation
When one begins using the JRL-2000F or when the exciter frequency has been changed,
the amplifier must be tuned by using the preset matching data which are stored in memory.
This is done by pressing the SET switch on the front panel.
When the SET operation is performed, the JRL-2000F automatically measures the transmit
frequency of the exciter and instantly sets the antenna tuner and selects the proper antenna
according to the the preset data for the operating frequency.
During
SET
operation, the JRL-2000F acts as a dummy load so no interference is caused during
tune-up.
Immediately after turning the power on, the JRL-2000F automatically recalls the settings from
the previous operating session. Therefore it is not required to perform the SET operation if
you are to operate on the same frequency as before.
If the Japan Radio Company JST-135 transceiver is used as the exciter, the SET operation
is not required. The JRL-2000F will read the operating frequency from the JST-135 and set
the matching data automatically.
Important
If the power amplifier is operated without performing the SET operation and without
matching the antenna, one of the
JRL-2000F's protection circuits may be activated
or undesired waves may be emitted.
6.4.1
SET operation procedures
After changing the transmitter frequency, press the switch. The LED on the
switch will light and the preset matching data will be
rea-d from memory. If the forced
transmission signal line (pin
11)
of the JRL-2000F control terminal is connected to
the exciter, the exciter will automatically enter transmission mode.
In CW mode, the JRL-2000F samples the RF signal from the exciter and reads the
matching data from memory according to the transmit frequency of the exciter.
In SSB mode, it is necessary to speak a few words into the microphone in order to
modulate the signal and allow the JRL-2000F to sample the transmit frequency.
If pin
11
is not connected, see the "Supplements" section below.
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