Quantar Migration to TDMA
Posted: Fri Aug 15, 2003 5:55 pm
O.K., for you Super Quantar Experts:
Do you knnow if the current Quantar is upgradable to handle the next phase of APCO?
Today's Quantar is capable of meeting the current APCO P25 standard that requires 2 talk paths of FDMA per 25 kHz channel. The next phase of APCO dictates 4 talk paths of TDMA per 25 kHz.
Please don't shoot the Messenger---I'm not saying the next APCO phase standard is good/bad---just stating the facts, maam! The next phase has been set in concrete for some time, so there's no turning back. I think the next APCO phase is expected to take effect in the next several years, give or take.
I understand that the UHSO option on the Quantar will be a necessity for supporting the 6.25 kHz bandwidth TDMA scheme, but what about the rest of the repeater's guts?
What about the DIU3000? (A good guess says that it dies with the end of the current FDMA phase, since I believe that APCO calls for 100% digital at that time---You know: What's analog?) I think Motorola's current S6 infrastructure already is 100% digital, with no such animal as a DIU3000, so I can't imagine the next phase having any use for DIU's and any sort of analog ancillary gear.
I won't even ask about the ASTRO P & M radios' abilities to be upgraded to the next APCO phase, especially since that question doesn't belong under infrastructure.
Larry
Do you knnow if the current Quantar is upgradable to handle the next phase of APCO?
Today's Quantar is capable of meeting the current APCO P25 standard that requires 2 talk paths of FDMA per 25 kHz channel. The next phase of APCO dictates 4 talk paths of TDMA per 25 kHz.
Please don't shoot the Messenger---I'm not saying the next APCO phase standard is good/bad---just stating the facts, maam! The next phase has been set in concrete for some time, so there's no turning back. I think the next APCO phase is expected to take effect in the next several years, give or take.
I understand that the UHSO option on the Quantar will be a necessity for supporting the 6.25 kHz bandwidth TDMA scheme, but what about the rest of the repeater's guts?
What about the DIU3000? (A good guess says that it dies with the end of the current FDMA phase, since I believe that APCO calls for 100% digital at that time---You know: What's analog?) I think Motorola's current S6 infrastructure already is 100% digital, with no such animal as a DIU3000, so I can't imagine the next phase having any use for DIU's and any sort of analog ancillary gear.
I won't even ask about the ASTRO P & M radios' abilities to be upgraded to the next APCO phase, especially since that question doesn't belong under infrastructure.
Larry