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38
11.4 VFO Main Tuning Knob
VFO menu (detail)
Fig. 46
Example
1st pushing STEP
2nd pushing STEP
3rd pushing STEP
and SUB VFO Tuning Knob
(active RX)
Primary means of tuning the active RX (MAIN- or SUB-RX) is the VFO Main
Tuning Knob. With a full rotation it generates 512 steps, so that depending on
the chosen tuning increments 512 Hz, 5.12 kHz, 51.2 kHz or 512 kHz can be
run through.
The SUB VFO Tuning Knob generates 256 steps with a full rotation, so that
depending on the chosen tuning increments 256 Hz, 2.56 kHz, 25.6 kHz or
256 kHz can be run through.
General frequency coverage of both RX is 9 kHz to 30 MHz, 50 to 54 MHz,
69.9 MHz to 70.7 MHz and 110 MHz to 148 MHz. Due to the frequency
scheme of the PT-8000A the ranges between them are blanked out.
Transmit operation is only possible on the allocated amateur radio bands of
that IARU region in which one the TRX will operate after delivery (see Page 28 /
Table 13 and 14).
In case the transmit boundaries are to be modified (commercial application;
signal generator operation; new amateur radio frequencies) please contact
Hilberling GmbH for further information about a software update.
The tuning increments of the VFO are adjustable through STEP selection, which
is allocated to the VFO softkey menu.
If the VFO menu is not displayed, push button VFO A/B (see Page 40).
Softkey STEP
(towards fine tuning) decreases the tuning increments by
power of 10. Additional digits appear at the VFO frequency readout.
Softkey STEP
(towards coarse tuning) increases the tuning increments by
power of 10. Lesser digits appear at the VFO frequency readout.
Selectable increments are 1 Hz / 10 Hz / 100 Hz / 1 kHz.
Digits below the selected tuning width are set to 0 and will be displayed in dark
grey.
Displayed VFO Frequency
1.234.567
1.234.560
1.234.500
1.234.000
(RX in the Background)
Transceiver Frequency
1,234.567 kHz
1,234.560 kHz
1,234.500 kHz
1,234.000 kHz
Tuning Increments
1 Hz
10 Hz
100 Hz
1 kHz
Tab. 16
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