This is MR-1 and this is a test transmission.

7 seconds sound clip from the The Angry Red Planet movie soundboard.

You can hear this line at 00:46:26 in the Blu-ray version of the movie.

Quote context

[...]

- Well, we have four days left to find out.

- Isn't your Earth contact a little late?

- Yeah, it is. Over an hour late.

- Try your equipment.

- It's not equipment failure. I get nothin' but dead air.

- Keep your line open and try transmitting.

- This is MR-1 and this is a test transmission.

- It's no use. Our signal keeps bouncing back at us. I can't get through.

- There must be some kind of ionized layer in the Martian atmosphere, keeping those radio waves from going through.

- Yeah, and keeping Earth's reports from reaching us.

- I never heard of anything that'd stop the frequencies I'm using.

- Well, you're hearing about it now.

- Keep taping our reports, Sammy.

[...]