Hi Manuel, If you use an antenna switch to switch away from the ensemble RX before transmitting (similar to the old days, or if you have a RF sense T/R relay),Message 1 of 2 , May 6View SourceHi Manuel,
If you use an antenna switch to switch away from the ensemble RX before transmitting (similar to the old days, or if you have a RF sense T/R relay), then you can disable RX on the ensemble by disabling the QSD enable line. This will stop the receiver from receiving... muting the receiver.
Odds are very good that your transceiver has a PTT relay output, designed to drive a linear amplifier. You could build a small circuit to drive an opto-isolator via that relay. Ping me offline if you aren't sure how to accomplish this and need help.
The QSD enable line is only for muting the receiver, it won't protect the receiver from your transmitter. But you already know that. I don't know how fragile the Ensemble is, I've read where people will use those little lightning-protection circuits in series with their receiver to protect it from stray RF, especially if they're using dual antennas.
-73 Adam W7QI
On 5/6/2013 8:18 AM, manuel wrote:
I would like to use an SDR ENSABLE receiver with my transceiver TS-850 , no as panoramic receiver but take only the TX section from my transceiver, so I can prevent the annoying intermodulation disturb that the RX tranceiver produced. To do this I need an antenna switch, but how I can disable the ENSABLE RX when my transceiver is key down (PTT).
There is a method to put the sdr receiver in a mute state? Or disable the RX state ?