The QX-6A/QX-600 master station can operate from 115/230 V
ac
(50/60 Hz) or +11 to +20
V
dc
(1.0 A, maximum; 700 mA, nominal). The QX-6A/QX-600 has a built-in interface for
most types of wired intercoms; internal switches are provided to program the interface.
Unless otherwise requested, systems are normally supplied preset for Clear-Com
compatibility. However, they can be easily reset for operation with RTS (or other) systems.
The system includes the capability of “linking” two master stations together to form a “12-
up” system with two audio cables. A master station can also be linked to other audio
equipment. All audio interfaces are via standard two-conductor microphone cables with
three-pin XLR type connectors. A larger number of systems may be tied together through a
wired intercom system. It is also possible to tie together multiple systems without a wired
intercom if proper cable terminations are provided. Consult the Vega factory for more
information.
Two antenna connections are provided on the master station —one for the receive antenna
and one for the transmit antenna. Whip antennas have been included for use with the systems;
however, other types may be used.
Vega offers headsets for use with the QX-6A/QX-600 system. (Consult your Vega dealer or
the Vega factory for more information.) Both the QX-6A/QX-600 master station and the
QTR-2/QTR-600 portables are compatible with standard Clear-Command Beyer DT108
headsets. See Section 6 for additional information on headset compatibility.
The QTR-2/QTR-600 wireless remote is a portable transceiver designed specifically for use
with the QX-6A/QX-600 master station. It provides full-duplex “hands free” communication
between a roving user and the master station.
Two QTR-2 portables can provide direct two-way full-duplex communications without the
use of a master station. If the transmit and receive frequencies are the same, an unlimited
number of QTR-2 portables may be used in direct two-way simplex (push-to-talk)
communications without a master station. This mode of operation does not apply to QTR-600
portable units.
The QTR-2/QTR-600 operates from two 9-volt “transistor radio” batteries. Use only high-
quality batteries. See Section 8 (“Batteries”) for further details.
Vega offers a high-capacity rechargeable-battery option that attaches to the bottom of the QTR-
2/QTR-600 assembly. Properly charged, this battery provides 8-10 hours of operation.
Master Station Configuration
The QX-6A/QX-600 master station can be equipped with receive modules to support up to
six portables and an unlimited number of listen-only PL-2 portables. Your system may be
equipped for fewer portables; this may be verified by examining the serial-
number/frequency-assignment label on the bottom of the unit. The QX-6A/QX-600 consists
of up to six receivers, one transmitter, a receiver multicoupler, a power-supply subassembly,
and the main audio board. The QX-600 also includes a UHF-to-VHF downconverter as part
of the multicoupler subassembly.
The audio board contains the receiver and transmitter interface circuits, the control switching
and logic, the link circuits, and the general-purpose wired-intercom interface. The intercom
interface is programmed by means of five multiposition DIP switches.
Up to six different receive frequencies are used on the master station —one for each
supported portable. A common transmit frequency is provided by the master station for all
portables. Audio from the six receivers, the front-panel headset, the link input (if active), and
incoming intercom voice is summed and applied to the transmitter. In this way, the portables
may hear all system voice signals (including themselves). Similarly, the intercom output is
driven by all audio sources except incoming intercom audio, and the link output is driven by
all audio except “link in”. This arrangement configures the QX-6A/QX-600 and portables as
a “party line” in much the same manner as for wired intercom systems.
Wireless Intercom System
3
