ASTRO CAI and VSLEP in Same Radio???

Son of Trido · Post by **Son of Trido** » Fri Oct 26, 2001 6:29 am

Can a Saber or XTS3000 be capable of both the APCO25 CAI and VLSEP modulation types?

Reason I ask - the UHF conventional ASTRO Saber II I have allows both modulation types to be selected in RSS.

Most of my interest is in APCO25 CAI, although a local utility uses VSLEP.

Thanks
Son of Trido

junkyardnut · Post by **junkyardnut** » Fri Oct 26, 2001 12:34 pm

You cannot have IMBE(APCO25) and VSELP vocoding in the same radio. The selection is RSS is to choose the vocoding method, but you need to have the correct firmware in the radio to do IMBE or VSELP. I've tried turning on IMBE in a VSELP radio (or the other way around?) and the radio would reset on PTT.

Son of Trido · Post by **Son of Trido** » Sun Oct 28, 2001 11:52 am

Junkyard Nut

Thanks for the info - one question, this applies both to TX and RX???

Thanks
Son of Trido

Elroy Jetson · Post by **Elroy Jetson** » Sun Oct 28, 2001 2:20 pm

No. The firmware in the radio can ONLY support one or the other, VSELP or IMBE. No mixing and matching in the same radio.

Funny things happen if you try to insert VSELP codeplug into an IMBE radio. Or vice versa. It doesn't work right.

Elroy

junkyardnut · Post by **junkyardnut** » Sun Oct 28, 2001 3:03 pm

Yeah, funny things do happen. Actually you've got to have a pretty good sence of humor to consider it funny.

Neither Rx nor Tx work in mixed IMBE/VSELP.