atomicthumbs
Newbie
Howdy. I've got Unitrunker set up with a pair of RTL-SDR dongles and Trunking Recorder, monitoring San Francisco's Motorola Type II system.
My audio seems plagued with incredibly obnoxious momentary dropouts, as demonstrated in the following recording: https://pinopsida.com/misc/unitrunker.mp3
It also has that odd crackling, which may have begun after I enabled the squelch at an appropriate value on all voice VCOs.
I suspect that the dropouts may be the fault of the dongle retuning while it's receiving, which brings me to my other question: is there any way to pin the center frequency of one receiver to keep it from retuning, or tell its VCOs not to pick up something that would lose the control channel?
With two receivers at 2.5 msps, I ought to be able to record the entire system, but the way things seem to be set up, I can only monitor up to eight channels, and only within one receiver's worth of bandwidth. Adding any voice VCOs on the receiver currently dedicated to the control channel causes it to tune the control channel out of its bandwidth.
The software can tell well enough when a channel is out of range of the receiver, but it doesn't seem to put that information to the good use it could!
My audio seems plagued with incredibly obnoxious momentary dropouts, as demonstrated in the following recording: https://pinopsida.com/misc/unitrunker.mp3
It also has that odd crackling, which may have begun after I enabled the squelch at an appropriate value on all voice VCOs.
I suspect that the dropouts may be the fault of the dongle retuning while it's receiving, which brings me to my other question: is there any way to pin the center frequency of one receiver to keep it from retuning, or tell its VCOs not to pick up something that would lose the control channel?
With two receivers at 2.5 msps, I ought to be able to record the entire system, but the way things seem to be set up, I can only monitor up to eight channels, and only within one receiver's worth of bandwidth. Adding any voice VCOs on the receiver currently dedicated to the control channel causes it to tune the control channel out of its bandwidth.
The software can tell well enough when a channel is out of range of the receiver, but it doesn't seem to put that information to the good use it could!