Apr 7, 2024 · If you're looking at getting a digital scanner, it can be difficult to tell what system support you need, especially making the decision between an SDS with its simulcast support or an older …

Apr 4, 2024 · Currently, we are in the process of transitioning to the P25 standard. Our focus has turned toward understanding the implications of Continuous Four Frequency Modulation (C4FM) and Linear …

Dec 16, 2008 · I've read that LSM uses CQPSK modulation; that it uses a pulse-shaping filter that is slightly different than the "standard"; that C4FM is used for the uplinks, LSM is used on the downlinks …

Jan 2, 2025 · I have been monitoring a P25 Phase II LSM 700MHZ system for a few years now with a Airspy R2 with no issues. The system is in the range of 769-774 MHZ. Recently a new cell tower was …

Nov 22, 2013 · Does anyone know how to determine if a simulcast P25 system is LSM CQPSK or another type? There is a video showing the new BCD436HP scanner performing pretty well receiving …

Dec 3, 2023 · The trace on the right is definitely CQPSK (or LSM) and that trace is similar to what I would be looking for on the Anritsu. The main difference being that my displayed trace (s) would …

Jul 15, 2017 · I've resolved (at least improved a lot) simulcast issues with my BCD536HP on a local P25 phase II system. Items modified: Threshold changed from AUTO 8 to MANUAL 7 ATT (Attenuation) …

Apr 10, 2019 · Everyone's results are going to be different based upon location, location, location. scanmanmi: The only way to know if you will experience LSM Distortion in to try it out precisely …

Oct 29, 2021 · Simulcast Distortion secondary to LSM is tricky business. When you have multiple towers that are close together simultaneously broadcasting the same thing your radio is calling for you get …

Oct 18, 2013 · If the system is simulcasted, then the linear repeaters employ CQPSK modulation, which Motorola calls "LSM" (Linear Simulcast Modulation). Only the fixed network equipment, i.e. the GTR …