Hooking DishNetwork receiver to amp=speaker noise?

I tried to send the audio outputs of my Dish Network receiver to an input on my integrated amp and it causes some low level speaker noise even when I don't use that input. The same happens if I hook the TV output to the preamp.
Normally things are dead silent with my CD players.

So I gave up on this idea (don't want to contaminate my good equipment which is for music first).

Any idea of the cause of this or any solution?
Maybe a ground loop?
If your TV has audio out you can try using those. I have Direct and have used both the TV out and the receiver out to a pre; can't even remember which I am using now. Direct from receiver is theoretically better but can't remember much of a difference.
OK, I found a pretty good solution. I bought a little powered switching box that takes 2 RCA inputs and has 4 RCA outputs (not a cheap one, about $80 from a company called RF Link), sent the Dish audio output into the box, and the output to my amp, and there is dead silence now with the Dish box connected.

But with the TV itself run into the box, there was still a bit of noise, so I didn't connect the TV.
But I'm happy now.
Likely a ground loop as stated by Kdbrink above. There are several solutions, but the easiest is the addition of a ground loop isolation box (like the Mondial Magic). They run about $80. Happy Listening.
Another vote for a ground loop issue. I have had my (various) Dish receivers hooked to my stereo for years and have never had any issues you speak of.

I have also used the digital out on the back of my Dish receiver and ran it to my DAC. The sound was a touch better, but nothing spectacular; I was using it for the satellite radio stations and they are compressed.
Are you using the antenna input on the Dish box?
If you are what is it?
I once used the antenna input for basic cable so when dish went out I still had channels I could watch.
I had to also install a Mondial Magic because of the hum when cable was connected.
If you have an optical input available, try that.

Optical won't complete the ground so no 'loop'.

Now, on the Dish receiver, go to the menu and 'system setup' than 'audio setup'.
Get rid of the night volume leveling and set output to PCM only.
I have had this same experience when directly connecting the audio out (L&R) from an aging 301 receiver. The condition was not appairent at first but presented itself after years of operation. After a little trial and error I found that it was an internal ground loop due to aging components in the Dish Receiver. The telling tell was that hum was present even if the Dish receiver was completely disconnected from everything. The moment I plugged in the interconnect cables from the intergrated amp into the Dish receiver, the hum was back.

I solved the problem by going to a new Dish 211k receiver with an optical output. As Brianmgrarcom said, the sound is better/acceptable, but not spectacular.
I had the same problem - cable box RCAs or TV RCAs into my integrated amp caused a hum. Much more apparent on the input I used, but still present regardless of the input I used.

The cause was/is different ground points being used for the cable wire and my system (aka ground loop?).

I got a Jensen Cable TV RF Isolator. Zero noise now. Costed about $60.

Googling it, I just saw on the website that it says "This unit will not work with satellite systems."

I'd imagine their are ones available for satellite systems. Also as has been mentioned, use an optical connection if you can. This is the driving force behind optical, as there's no electrical signal being passed.