DX Engineering DXE-RR2X8, Руководство пользователя

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Introduction
The DXE-RR2X8 is a dual 8-port switch designed to switch coaxial lines in low to medium-power
RF systems typically used in a Single Operator - 2 Radio (SO2R) environment.
The DXE-RR2X8 allows the user to switch inputs from either Master or Slave 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-RR2X8 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 Master or Slave from selecting the same output port at the same time. The
DXE-
RR2X8 contains no internal logic or T/R switch sensing for transmit protection.
When selecting the various switch positions, the Master has precedence. This means if the Master
selects output port #3, the Slave cannot use port #3 at the same time.
Slave will then be transmitting to an open
Another example would be if the Slave has selected port 5 and you are transmitting, and the Master
then selects port 5, the Master takes port 5 and Slave will then be transmitting into an open.
Features
Enclosed relays provide exceptional performance and are moisture resistant. The RR2X8 can be
used to simultaneously select multiple output ports as well as conventional one-of-eight antenna
switching. This allows the
RR2X8 to be used in complex antenna systems as well as traditional
switching arrangements.
The RR2X8 also uses removable screw terminals for the control
cables. The removable plugs greatly simplifies installation by
eliminating the need for soldering. Disassembly is not required for
control wiring access.
The RR2X8 also offers the following features:
•
Stainless Steel Weatherproof Housing - unique
protection
•
Excellent Port-to-Port Isolation; greater than 70 dB at
30 MHz, worst case.
•
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