It depends on the dish size. If you look at the San Diego meeting notes in EaglePedia, you'll see that the proposal is a digital S/C trasponder to support 4800 bps with a 2-foot dish and 256 kbps with a 6-foot dish. This assumes a CP feed. Multiply by 1.4 for linear polarization. There is also a proposal for a low-speed mode B digital service that works with small fixed antennas. The 4.8 and 256 kbps services use wideband uplink and downlink signals so the microwave radio will likely be something that plugs into a USB port and does as much as possible in the PC.
73,
John KD6OZH
----- Original Message ----- From: sco@sco-inc.com To: amsat-bb@amsat.org Sent: Friday, September 15, 2006 05:28 UTC Subject: [amsat-bb] S Band UP
I now have 2m, 70cm and 2.4ghz antennas for satellites. The radio is a Ft-847 with receive SSB preamps on V and U bands.
I have a BBQ dish with a SSB 2.4 ghz downconverter. That will work fine with P3E (it did with AO-40). Could I still use the same dish for S Band uplink on Eagle? I would need some form of a upconverter (from 70cm to 2.4 ghz) plus a amp, to make that work?
If I am using the S band for the uplink which band am I using for the downlink? 2m or 70cm?
Les W4SCO
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