JRC JRL-2000F - 5.3 Remote Control Unit (NCH-365)

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(2)TUNE

When the TUNE switch

pressed, the LED of the TUNE switch lights up.

lf an exciter other than JST-135 is used, proceed to the step of "Operation of fre-

quency measurement". The state of relays is preset according to the measured fre-

quency without the steps of read-out of the

rt:~emory

and selection of the antenna:--

When the JST-135D exciter is used, the procedures described above are omitted.

Then the JRL-2000F returns to receive state and

of the antenna switch unit is

switched. The JRL-2000F returns again to transmit state and changes SELBK signal

to Low Ievei. The LOAD signal of the impedance detected by the impedance detector

of the CFG-111 matehing circuit

checked and the relay state is changed

one bit.

Then TUNE signal of the impedance phase is checked and the relay state

changed

again by one bit. Again the LOAD signal is checked and the relay state is changed

one bit. The state where the LOAD and

TUNEsignalsare

reversed is searched for

repeating these procedures. lf the SWR value of the impedance detector circuit is less

than 1.1, the automatic tuning

thought to be completed. During automatic tuning, the

7-segment LED

shown

in Fig.10 and the sound of when relays are switching

heard. Also during automatic tuning, the divided Signallevel is checked at times and

"Po" is displayed when the inputpower is too small and "A6" when it is too !arge, as is

the

samein

the SET operation, and automatic tuning is stopped temporarily. When the

automatic tuning

completed, the data is written to EEPROM. The 7-segment LED on

the front panel is shown as in Fig.11 for an instant, and then the frequency

dis-

played. lf the automatic tuning has failed, "A7'' is displayed.

Fig.10

Fig.11

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