Search found 2 matches

by Rijndael
Tue Oct 02, 2007 11:48 pm
Forum: Astro DStar and other digital voice formats
Topic: Please Edumacate me...
Replies: 60
Views: 79837

Reference Wowbagger’s and other comments the key issue with nonlinear modulation methods is adjacent channel power. While OFDM sounds cool it poos all over the adjacent channels even with a decent class linear amp. Remember that we’re talking land mobile here, that’s neg 60 dB in the adjacent channe...
by Rijndael
Tue Oct 02, 2007 10:51 pm
Forum: Astro DStar and other digital voice formats
Topic: Please Edumacate me...
Replies: 60
Views: 79837

Actually you can get close to 5,000 bps in APCO packet data in IVD. Even peer to peer with a pair of XTS5000 radios you’ll see close to that. If you location enable the ‘5K the GPS data can be polled via the IVD during voice and carried in the approx 88bps overhead. But it is more normal to poll the...