A plain mobile FM rig probably will NOT work for 9k6... you need unprocessed (no de-emphasis) discriminator output to your sound card for receive, and direct (no pre-emphasis) FM modulation for TX. Any pre-emphasis/de-emphasis cuts off the high audio frequencies necessary for 9k6, as will the hysteresis of any isolation transformers in your interface.
The 910H, and any other "9600-ready" rig with a data jack that provides those 2 connections directly to your soundcard, will work.
73, George, KA3HSW
----- Original Message ----- From: "Curt Nixon" cptcurt@flash.net To: "Alan" ve4yz@mts.net Cc: "'AMSAT-BB'" amsat-bb@amsat.org Sent: Friday, December 12, 2008 8:07 PM Subject: [amsat-bb] Re: ISS 9K6 with ICOM 910
Hi Alan:
Yep..I do alot of digital site recording of classical music using off-board A/D boxes. I can tell you that, even great laptops have really BAD sound handling ability. The stock AC97 system can be very noisy and I'm sure that would play havoc with 9K6. An option for getting the sound card to work is to let 2 computers talk to one another via their sound cards. I did this early on learning the 1200 baud system and it at least verifies most of the system without using up prime "pass" time.
You at least have the data ports on your radio--mine are just plain old mobil FM rigs so they might never work.
Thanks
Curt