WX Satellite inferference

I don't know what type of equipment you're using but if you've moved 100km and you still have it, I'd say that the interference is coming from your own equipment or something else that you're carrying around with you.

By saying that it seems to come from a drum type facsimile transmitter, I'd assume that the interference is sporadic (happens only from time to time).

I had a device come into the shop once that was also suffering from interference. Since the interference was still there after the customer delivered it to the shop (his house was about 30 miles away), I didn't think it was coming from anything other than the device itself. It turned out that I was correct.

On the main board, there was a circuit inside a shielded box. The box was losing its ground connection at the slightest movement. Fixing the ground fixed the problem with the interference.

That I have long since eliminated, I have two receivers which I can run from batteries and record the output on to a tape for future print out with all the power in the house switced of.

The problem is still there!

It is there most all the time but it is too weak to resolve any details and can only be seen when the satellite is low in the sky (less than 5°)

We're talking about a satellite tv receiver right?

You're tracking a satellite as it moves across the sky so it's not geosynchronous then. Could it be because you've got a second satellite that sits behind (or in front) of the target satellite when it's 5° or so above the horizon?

If this is the case, I don't know what you can do about it.

Then again, a vertical bar means that the difference frequency is close to the tv's horizontal scanning frequency. Or it may be that the second satellite is broadcasting a signal at around 15kHz or thereabouts.