Greggtheham
Member
- Joined
- May 8, 2020
- Messages
- 5
I’m am new to DRM (actually, all amateur digital FM). While trying to get “my head around” a pre-programmed codeplug in my Anytone HT, I tested its xmit RF frequency output on an older handheld RadioShack LCD frequency counter ( good up to a gig) . I found out none of the digital (drm) frequencies (all on 70cm) could be read. Analogue FM was fine. I imagine it has something to do with the gate speed of the counter and how it works with Time Domain. So what special specs does an RF frequency counter need to read digital TDMA (and FDMA) for RF frequency ? Regardless of the TDMA, is the 12.5KHz bandwidth perhaps too narrow for this counter? I am sure having a hard time adjusting to the “FM” digital realm ...note; pushing the counters “ gate speed“ count button while xmitting does result in some non-70cm readings. Note sure if they are mathematically relevant or useful. Tnx es 73