I own a Tx/Rx Radio Direction-Finding (RDF) set for a sport called falconry, basically, locating & recovering a pet falcon after flight.
The Tx tag is at 218.025MHz from Marshall Radio Telemetry :
The Rx is a 10-channel receiver, TRX-10S, from Wildlife Materials Inc. :
I believe all systems for wildlife tracking from different manufacturers are compatible and speak the same modulation language.
Now, I want to know the modulation technique used by the Tx tag, I have my beloved Rigol DSA815-TG spectrum analyzer, but the problem is that, as with all RDF beacons, the signals they transmit are intermittent. They have the famous "Tet...Tet...Tet..." beep fashion... so I can't see the spectral content for an adequate amount of time -- and that is only when I'm able to pick it up (some times the spectrum analyzer misses it...)
My -clear- questions are :
- What is the modulation technique used in those wildlife tracking beacons?
- Whether I knew a straight answer to (1.) or not, what is a reasonable setup with my Rigol to see the signal?
Tx Link : Marshal Radio RT Standard
Rx Link : TRX-10S