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20
9
MAIN-
SUB-RX O
AND
Fig. 23
Settings of the
RX which is the
active one
PERATIONS
The PT-8000A incorporates a transmitter and two independent receivers
(MAIN-RX and SUB-RX). Both receivers are permanently operating. Even if a
receiver is in the background i.e. not fully accessible through all main controls
the receiver is operating with its last settings when it has been the active one.
Using MAIN- and SUB-RX allows duplex operation mode.
Each of the two RX provides again two VFO: VFO A and VFO B. The active
VFO is called selected VFO, the other is called VFO in standby (s. P. 40).
Two controls are doubled, hence for these functions MAIN-/SUB-RX are
always accessible regardless of their status active or stand-by:
1. The selected VFO of the active RX (usually MAIN-RX) is always accessible
through MAIN tuning knob. The selected VFO of the RX working in the
background (usually SUB RX) is always accessible through SUB VFO knob.
2. The volume of MAIN- and SUB-RX is permanently adjustable through the
respective controls
Both knobs have a push function:
Pushing
MAIN will turn off PT-8000A speaker, pushing
HN-8000 speaker. (see also Page 53).
The push button MAIN/SUB (located in the cluster MODE) toggles between
the two RX changing their status active or background.
After power on the PT-8000A the MAIN-RX is the active one (corresponding
SUB-RX is working in the background).
LED MAIN-RX and LED SUB-RX indicate which RX is the active one and so
which is accessible through all knobs and buttons on the front panel.
In the upper left corner the display shows the label of the active one
(MAIN
or SUB).
Frequency, mode, filter bandwidths and S-meters are displayed for MAIN
and SUB respectively (see Figure 24).
Activation of noise reduction (NR), noise blanker (NB), DSP Filter, DSP-
Notch, IF-Notch, preamplifier, preselector and the squelch marker are
displayed for the active RX exclusively.
MAIN und
SUB.
SUB will turn off
Settings of the RX
which is in the
background
Fig. 24
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