Product ManualManual

The 7702BPX-LB L band 2 x 1 protection switches provide automatic changeover functionality to provide bypass protection for RF signals from 950MHz to 2250MHz.

When used for automatic changeover, the 7702BPXA-LB 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 7702BPX-LB may also be configured to operate manually as a 2:1 switch, which may be controlled locally or remotely via GPI.

The 7702BPX-LB occupy 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.

  • Intelligent auto switching with input power detection
  • Maintains switch state and RF channel on loss of power to card or frame
  • Supports automatic or manual control via GPI
  • Switch state indication via GPO
  • Card edge LEDs indicate active input channels, output channel and power levels below threshold
  • Fully hot swappable from front of frame
  • Wide operating frequency range, 950MHz - 2250MHz
  • Comprehensive signal and card status monitoring via four digit card edge display

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RF Input/Output
Number of Inputs2
Number of Outputs1
ConnectorBNC per IEC 61169-8 Annex A (F-Type and SMA optional)
I/O Impedance75Ω
Frequency Response
950MHz to 2250MHz< ±1.5dB
Insertion Loss
950MHz-1450MHz< 4dB
950MHz-2250MHz< 5dB
Return Loss> 10dB
Isolation> 45dB
Input Power Range0dBm to -50dBm
General Purpose Input
Number of Inputs2
TypeOpto-isolated, active low with internal pull-ups to +5V
Connector2 pins plus ground on 6 pin terminal strip
Signal Level
+5V PullupLow: -5V to +2.5V DC, High: 3.5V to 10V DC
+12V PullupLow: -5V to +9.5V DC, High: 10.5V to 15V DC
Maximum Sink Current15mA (input shorted to ground)
Maximum Leakage Current
for Input High
General Purpose Output
Number of Outputs1
Type"Dry Contact" relay contacts - normally open & normally closed contact provided
Connector3 pins on 6 pin terminal strip
Voltage+12V DC
Power4 Watts
Number of Slots1

Ordering Information

7702BPX-LB2 x 1 RF Protection Switch for L-Band Frequencies
Ordering Options
Notes75Ω I/O Impedance ships standard
Rear plate and fiber connector must be specified at time of order - eg: [model]+SC+3RU
Connector Suffix
+F7575Ω F-Type
Rear Plate Suffix
+1RU1RU rear plate for use with 7701FR Multiframe
+SAStandalone Enclosure Rear Plate
+3RU3RU rear plate for use with 350FR, 7700FR-C or 7800FR Multiframes
350FRPortable Multiframe which holds 7 single slot modules
7700FR-C3RU Multiframe which holds 15 single slot modules
7800FR3RU Multiframe which holds 15 single slot modules
7701FR1RU Multiframe which holds 3 single slot modules
S7701FR7700 Series Standalone Enclosure