losangelescop wrote:What are they, what do they each do, what are they used for and are they any good???
MDC1200 basically transmits a brief data packet at the beginning of your transmission, containing the 4-digit number (hex) you give it. It's generally used for unit IDs; as Jim2121 says, dispatchers can tell who's talking. (Some units--not Sabers, though--are able to decode the data itself.)
Some Sabers have an emergency button, which, when pressed, sends a series of data indicating your ID and that you're in an 'emergency' mode. I'd dare say that MDC1200 is almost ubiquitous in public safety use.
MDC600 is just a (much) older version of MDC1200. I'm not aware of
anywhere using it.
I've heard that they also emit tones when you push or release the PTT, kind of like MODAT and Roger Beep. Is that also correct?
What you're probably thinking of is the "sidetone." It's just a beep that comes out of the speaker when it's transmitting the MDC1200 data so that you know not to talk. (If your Saber is secure-capable, or programmed to think it is, you'll get a very short beep on PTT anyway in clear mode.)
Also how good are Secure Capable Saber III's, I have an opportunity to finally buy a couple and wondering about good and bad points on each, and how they compare in TX/RX quality and range with Waris and Jedi radios, using UHF whip antennas?
I've been quite pleased with mine. (Performance-wise, there's no difference between secure-capable and non-, just the ability to house a secure module, which makes the radio a little bigger... They're the same otherwise.) The only 'downside' is that they're an older platform, so they don't have all the fancy bells and whistles that you probably don't need anyway. (Things like Smartnet trunking, Digital ID display, more advanced MDC features...
A couple caveats that may or may not apply to you:
- The UHF Sabers (H44...) came in several bandsplits, and eBay is often flooded with "government split" ones on 403-433 MHz, which is essentially useless. You can't tell which of the bandsplits it's on by the model number, and sellers rarely have any idea... So if you're buying a UHF from a seller who doesn't specialize in Motorola gear, or who's just not trustworthy, UHF Sabers can be a gamble.
- Secure-capable radios that don't have a secure module should have a 'bypass module' in them. If the bypass module is removed, you'll get no audio. (It's just a matter of soldering a wire in place, though, if it comes down to it.) I've never seen a radio sold without some sort of module, but be aware that it could happen.