Jump to content

Recommended Posts

Has anybody got an idea where the interference in the center of that video snapshot might originate from?

I'm amazed by the almost digital look of the bright/dim changes and the very sharp vertical boundary of the interference.

At app. 120 black/white changes per line, the frequency would be: 625 (PAL) x 25 fps x 120 = 1.875 MHz

given the vertical span of 1/10 of 576 visible lines the duration is 625/(576/10) x 1/25 = 3,5ms interference duration.

1.875MHz for 3.5ms, does that ring any bells?

The setup: test inside residential building,

distance 8 yards, one wall in between, signal quite strong

200mW, f=980MHz e.g. not inside Austrian 900MHz cell phone band (890-960)

Link to post
Share on other sites

It is external interference of some kind. Could be anything: something located near or far from the flying location, or something you bring with you to the field.

Also, don't ignore any RF sources that are not on your exact frequency. Strong RF that has a frequency that is vastly different from your Rx's RF channel can still affect your system.

BTW, when it comes to recognizing noise issues, a high quality video recording is much more useful than a still photo.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...