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2x1 RF Protection Switch

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The 7703BPX-DC-RF is a 2x1 RF protection switch for a wide range of frequencies. It provides automatic changeover functionality to provide bypass protection of RF signals from 1-2250MHz, and for DC LNB bias.

The 7703BPX-DC-RF has integrated VistaLINK® technology for remote control and monitoring capability via SNMP. This provides the ability to locally or remotely configure and monitor parameters such as module status, selected input, power level and switching threshold.

When used for automatic changeover, the 7703BPX-DC-RF has a MAIN input and a STANDBY input. It will automatically switch to the Standby input when the Main input power is weak or lost. Switch back to the Main input when the signal is re-established, may be configured to happen manually or automatically. The 7703BPX-DC-RF may also be configured to operate manually as a 2:1 switch, which may be controlled locally or remotely via GPI or SNMP.

The 7703BPX-DC-RF/ LB occupies one card slot and can be housed in the 1RU 7801FR frame which holds up to four single or two dual slot modules, the 3RU 7800FR frame which has a 15 slot capacity, the portable 3RU 350FR frame which has a 7 slot capacity, or a standalone enclosure which holds a single module.


  • Wide operating frequency range, 1-2250MHz
  • Intelligent auto switching with input power detection
  • User-definable threshold levels
  • Maintains switch state and RF channel on loss of power to card or frame
  • Supports automatic or manual control via GPI or SNMP
  • Switch state indication via GPO
  • Card edge LEDs indicate active input channels, output channel and power levels below threshold
  • Passes DC LNB bias and 22kHz tone
  • Fully hot-swappable from front of frame
  • Comprehensive signal and card status monitoring via four digit card edge display or remotely through SNMP and VistaLINK®
  • VistaLINK® capability is available with the 3RU 7800FR or 350FR portable frame and a 7800FC/7801FC/7700FC VistaLINK® Frame Controller module in slot 1 of the frame


RF Input/Output

Inputs 2
Outputs 1
Connector 1 BNC per IEC 61169-8 Annex A (F-type and SMA optional)
I/O Impedance 75Ω, 50Ω optional
Frequency Response
1-2250MHz < ±1dB
Insertion Loss
1-2250MHz < 2dB
Return Loss > 7dB
Isolation > 45dB
Input Power Range 0dBm to -50dBm

General Purpose Inputs

Number of Inputs 2
Type Opto-isolated, active low with internal pull-ups to +5V
Connector 2 pins plus ground on 6-pin terminal strip
Signal Level
+5V Pullup Low: -5 to +2.5V DC, High: 3.5 to 10V DC
+12V Pullup Low: -5 to +9.5V DC, High: 10.5 to 15V DC
Max Sink Current 15mA (input shorted to ground)
Max Leakage Current for Input High 200µA

General Purpose Outputs

Number of Outputs 1
Type "Dry Contact" relay contacts - normally open & normally closed contact provided
Connector 3 pins on 6-pin terminal strip


Voltage +12V DC
Power 4 watts


Number of Slots 1

Ordering Information

7703BPX-DC-RF 2x1 RF Protection Switch for L-Band and IF Frequencies, with VistaLINK® Monitoring
7703BPX-DC-RF-B50 2x1 RF Protection Switch for L-Band and IF Frequencies, 50Ω BNC connectors with VistaLINK® Monitoring
7703BPX-DC-RF-S50 2x1 RF Protection Switch for L-Band and IF Frequencies, 50Ω SMA connectors with VistaLINK® Monitoring

Ordering Options

Notes Rear plate must be specified at time of order - eg: [model]+3RU
If 75Ω F-type connector required, order optional +F75
Connector Suffix
+F75 75Ω F-Type
Rear Plate Suffix
+1RU 1RU rear plate for use with 7701FR Multiframe
+SA Standalone Enclosure Rear Plate
+3RU 3RU rear plate for use with 350FR, 7700FR-C, 7800FR or 7801FR Multiframes


350FR Portable Multiframe which holds 7 single slot modules
7700FR-C 3RU Multiframe which holds 15 single slot modules
7800FR 3RU Multiframe which holds 15 single slot modules
7801FR 1RU Multiframe which holds up to 4 single slot or 2 dual slot modules
7701FR 1RU Multiframe which holds 3 single slot modules
S7701FR 7700 Series Standalone Enclosure


7800FC 3RU Multiframe Controller (necessary for 3RU SNMP control)
7801FC 1RU Multiframe Controller (necessary for 1RU SNMP control)