multiple frequencies

  1. C

    DMR and frequencies

    I have a question about programming a system into a radio or scanner. In the table below, it shows 2 frequencies that are the same, under slot 1. Then you see 2 frequencies that are the same under slot 2. I'm not sure I understand this. It's a dmr system. My understanding is that DMR trunked...
  2. K

    switching between two frequency BWs at the transmitter

    Hello people! Trying to transmit (and succeeding) in the ISM BWs at 315 and 433 MHz using a 3.3V radio transmitter IC + PCB trace antenna. Current setup: separate boards for each one of the two ISM BWs; the antenna is adapted by a different set of capacitors to the 315 or 434 MHz BWs...
    • kellogs
    • Thread
    • antennas multiple frequencies pcb design
    • Replies: 0
    • Forum: Electronics
  3. S

    Help with 2 RTLSDR on 1 PC scanning 2 Frequencies

    Hi all, Total noob here looking for some advice on running dual rtlsdr dongles on 1 PC & listening to 2 separate frequencies at once. I will try explain best I can. I was using unitrunker to listen to local police on AP25 Digital but they have just gone encrypted so that's now useless, What I'm...
Top