I have just installed a new repeater running 15.11 on Debian Jessie on an RPi. No initial probems detected until I tinker with deemphasis in [Rx1]. WIth DEEMPHASIS=1 the ctcss is decoded succesfully ...

I chose to look at the frequencies in the low range of CTCSS tones (67 to 100Hz) because these are the closest together, with a minimum tone spacing of 2.5Hz between tones 2 (71.9kHz) and 3 (74.4kHz), ...

Short-range-radio co-existence is now possible using CTCSS carrier generation with a 256-B sine-wave lookup table. To allow multiple users to share one carrier frequency, many handheld transceivers ...

One frustration that is often experienced when mixing the same type of radio from different manufacturers is trying to match the CTCSS tones and DCS codes between them. Are there standard CTCSS tones ...