20
9
MAIN-
AND
SUB-RX
O
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
MAIN und
SUB.
Both knobs have a
push
function:
Pushing
MAIN will turn off PT-8000A speaker, pushing
SUB will turn off
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
.
Fig. 23
Settings of the
RX which is the
active
one
Settings of the RX
which is
in the
background
Fig. 24
Summary of Contents for PT-8000A
Page 1: ...HF VHF Transceiver PT 8000A Operating Manual Version 2 00 33...
Page 80: ...Blank Page...
Page 106: ...A2 16 Blank Page...
Page 108: ...A3 2 Blank Page...
Page 121: ...PT 8000A Appendix A5 v2 00 33 A5 11 Intentional Blank Page...
Page 122: ......
