The narrow band deadline is now past, or is it?
not all, licensees have now converted to narrow band. Most, not all, conversions have gone fairly well. There are exceptions, in particular with
those that have radios capable of operating in the companded mode. The term companding may be new to
you. For additional information, click here.
getting technical, there are various operating systems used by different
manufacturers. The idea is to compress
and expand transmitted audio to reduce the effect of increased noise and
reduced volume associated with narrow banding of 2-way radio channel bandwidth.
theory, companding is a good thing. In
reality, it NOT such a good thing unless all of your radios are the same brand,
or better yet, the same model. As you will see in the previously referenced
patent information, there are numerous patent holders with Radio Shack being
the originator. You don't think
Motorola, Kenwood, or ICOM is going to pay Radio Shack patent royalties do you?
result is that the companding systems apparently work only on tone squelch
activated channels and only with radios of the individual manufacturer. I haven't found any evidence to support this
theory except to say if you have a mixed brand radio system, it will work
better if you turn the companding option OFF!
far as reduced audio is concerned, make sure that you choose analog portable
radios with the highest audio output available. 500 millwatts (mW) is fine for wide band (25 kHz) channels or for
narrow band (12.5 kHz) or very narrow band (6.25 kHz) DIGITAL channels. 500 millwatts is not recommended for narrow
band ANALOG radio systems. 700 mW's is our
recommended minimum with 1000 mW being the best choice if available.
Audio Processing (DAP) also improves signal quality for analog narrow band
radio systems. Many of the older
repeaters will convert to narrow band, but we recommend replacement with a new
repeater such as the Hytera RD-982AN.
You can trade in your old repeater and get a brand new 50 watt analog
repeater for less than a thousand dollars!
Better yet, you get a five year warranty, and this repeater can be
upgraded to DMR digital when you are ready (DMR is the digital format offered
by Hytera and Motorola).
us a call at 800.489.2611. Tell us what
you have to trade and we'll take it from there! In the meantime, if you are having low audio problems after
narrow banding mixed brand radios, we suggest that you turn the Companding
option OFF!. P.S. That's a picture of the RD-982AN above. It is built to last for a long, long time
and it is fully compatible with the incredible Hytera Smart Dispatch system.
For additional information on narrow banding, on the topics of operation considerations, discussions on upgrading to digital, regulatory (FCC policies, enforcement, etc.) and technical issues, just type in the word narrow banding in the Search Box above the date at the beginning of this posting.
Welcome to our Blog site. Going forward, the following will be our only post for 2017. We've been on the web for a long, long time, but we figured it was time to do something different. You can read all about our 2017 Plan in the post below. In closing, let me share the words of my favorite poet - And they copied, and they copied, but they couldn't copy my mind, so I left them sweating and stealing, a year and a half behind. Rudyard Kipling