I live in an area where remote recievers are used to transmit comms back to a communications center. Several areas that don't have access to T1 or microwave links use motorola handi-talkie links to relay to a site that does. Reception of one of the sites is excellent at my house. My envisioned setup is an older analog scanner setup on the frequency with a pass filter in the audio line to filter out the voting tone. If anybody has information to do this or a link to someones project that has constructed something similar I would appreciate it.
Voting tone filter
- Thread starter Mattsenft
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DaveNF2G
Guest
Radio Shack has (or had) a small DSP box that could be used to notch out the tones. I have used it for that purpose myself in the past.
N4DES
Retired 0598 Czar ÆS Ø
Why listen to the in-bound audio? You will only hear one side of the conversation and as most voter systems work, will unsquelch on marginal signals that will usually be unintelligible due to the noise.
It's much better listening to the out-bound repeated audio so you hear every transmission.
It's much better listening to the out-bound repeated audio so you hear every transmission.
KS4VT said:
That's assuming there IS outbound audio to listen to. It might not be repeated.
Also, if it's simplex you WILL hear the reply from the base station since the receiver doesn't know to not 'listen' for those transmissions.
Joe M.
This system is not repeated. The reciever is located on the top of a mountain at a far better place than I will ever get an antenna. Since the transmitter and recievers are controlled seperately it is possible to hear all sides of the communication.
Al42
Member
Depending on the voting frequency (or range) a simple R/C T-notch filter may be enough.
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