Carrier Operated Relay quite often called as TR Switch is an RF sensing circuit with a double pole double throw relay that can be used to automatically switch an antenna between a separate receiver and transmitter.

Operation

Upon sensing a carrier it Switches Antenna from Receiver to Power Amplifier output. Once switchover is done with a prominent 0.5/1second delay the Bias out voltage is active through one of the connector. An opto isolated input provision is there just in case you wish to terminate the bias relay off .

At the rf input a pi attenuator provision is there on board in case you wish to reduce the input and take out the output to feed to input of your amplifier. The max. recommended input is 5watt. You may short the PAD with a small JUMPER in case you don’t wish to use the attenuator provision on board.

Ensure you are feeding 12v regulated DC

• Provides automated or manual switching
• Automatic Rf sensing requiring as little as 50mW of RF for switching                                                                            
• Frequency range of 1Mhz to 500Mhz                                                              
• Power handling of up to 1k Watts                                                                                                                             
• 12v regulated dc for operation                                                                                                                                          
• Schematics and connection procedure will be shared with the order

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