Just look at Moon bounce communication, which as close as you’ll get to interplanetary distance long path communication at present, that demonstrates why technically that pure digital modes and interception of super weak and phase and Doppler shifting signals are very much something that favours digital over analog over pure digital. So yes, analog can and will survive until totally superceded in all aspects and circumstances and we’re way feet deep into toddler steps as far as navigation of that ideal goes. Most resistant LEP (long earth path) modes are digital encapsulated in an analog transmission mode. Aside from certain immunities they can entail, certain uses (notably critical MGM usage) depends on analogue because SSB, RTTY (and other FSK modes) and CW still functions better in being resolvable by human and machine under extremes which render pure digital modes unresolvable - under such conditions, about the only pure digital modes which survive such conditions (at a ridiculously and and diabolically low transfer rate, but with solid error correction will eventually complete the send) are packet modes, pure FSK RTTY (SVCF type) TOR and CW. There will always be need for some analog radio and equipment. In that particular configuration, it was very interesting to see that the digital audio became so garbled and unrecognizable at the same point the tone squelch circuit on the radio just squelched the radio entirely. At that same point there was just clean audio on the digital side. At the 12 dB SINAD point there was noise, the occasional pop, and voice. I found that the 12 dB SINAD point was higher (in terms of signal level) of the point which the radio hit 5% BER for P25 operation. The radio was still setup exactly as it was the last time I loaned it out to a small PD…mixed mode, narrowband, conventional operation. Last week I had a chance to sit down with my R2670 service monitor and a Motorola APX1500 I had laying around and really do a good audio test.
R2670 service monitor free#
Some (such as myself) have been spoiled by the noise free audio of digital and simply can’t stand the analog noise.
![r2670 service monitor r2670 service monitor](https://i.ytimg.com/vi/0DJimKTf3t0/maxresdefault.jpg)
Analog offers higher fidelity audio if we are talking about being constrained to a 12.5 kHz channel but as it degrades it gets noisier and noisier.
![r2670 service monitor r2670 service monitor](https://i.ebayimg.com/images/g/4UsAAOSwW6hfpWeb/s-l300.jpg)
Digital offers better audio as the signals get weaker especially since most users can handle bit error here and there as they approach the proverbial cliff. Professionally I refused to touch any radio with tubes or channel elements…fun times.ĭigital and analog both have their places.