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[Paparazzi-devel] Uplink not working, downlink OK

From: Uttam Chandrashekhar
Subject: [Paparazzi-devel] Uplink not working, downlink OK
Date: Mon, 19 Jul 2010 05:41:09 +0530 (IST)

Hi guys,

Been having a peculiar problem. Setup consists of 2 868 Radiotronix modems. The downlink works fine, but uplink refuses to work! The antenna on the plane is a simple monopole antenna ( has worked great in the past on this modem ), and the ground setup is a patch antenna. The funny thing is that it almost looks like a range issue. On the ground, with the plane nearby, uplink works, I can move waypoints etc, but even 200mt's above, in the air, uplink refuses to work! I tried decreasing the number of downlink messages, but that did not help. I've never had problems with these modems in the past. Anyone know whats happening?

All inputs appreciated!


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