DX DXE-RR2X8B, Manual

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Introduction
The DXE-RR2X8B is a dual 8-port switch designed to switch coaxial lines in low to medium-
power RF systems typically used in a Single Operator - Two Radio (SO2R) environment.
The DXE-RR2X8B allows the user to switch inputs from either Main or Secondary radio to two of
the eight output ports using 1 of 8 logic inputs. The logic high required for switching is +12 Vdc at
100 mA. A switching time of less than 15 ms is normal.
The DXE-RR2X8B is intended to be interfaced with a customer supplied logical switching unit.
The logical switching unit used should provide for protection against hot switching and to prevent
attempts at the Main or Secondary from selecting the same output port at the same time. The
DXE-
RR2X8B contains no internal logic or T/R switch sensing for transmit protection.
When selecting the various switch positions, the Main has precedence. This means if the Main selects
output port #3, the Secondary cannot use port #3 at the same time.
Secondary will then be transmitting to an open
Another example would be if the Secondary has selected port 5 and you are transmitting, and the Main
then selects port 5, the Main takes port 5 and Secondary will then be transmitting into an open.
Features
Enclosed relays provide exceptional performance and are moisture resistant. The RR2X8B can be
used to simultaneously select multiple output ports as well as conventional one-of-eight antenna
switching. This allows the
RR2X8B to be used in complex antenna systems as well as traditional
switching arrangements. Ports that are not selected are grounded.
The RR2X8B also uses removable screw terminals for the control cables. The removable plugs
greatly simplify installation by eliminating the need for soldering. Disassembly is not required for
control wiring access.
The RR2X8B also offers the following features:

RF Shielded Weatherproof Housing - unique protection

Excellent Port-to-Port Isolation; greater than 70 dB at 30 MHz, worst case.

Ports not selected are grounded

High-RF tolerant UHF connectors

Enclosed 16-ampere RF relays

Safe 12-volt relay operation

16 MOVs for surge protection on control lines

16 RF bypass capacitors

Includes one DXE-SSVC-2P Stainless Steel V-Clamp for mounting