Jump to content
Sign in to follow this  

4CIF image quality

Recommended Posts

I have problem with image quality. Camera is D-Max DCC-521FH TDN 1/3'' Sony Super HAD CCD. Recorder is Samsung SRD 1670DC. With short 1m cable connecting camera and monitor image looks good. When connected through instrastructure of 100m RG6 there is color cast, unexpected dots. Should I assume low quality cable or camera?







Share this post

Link to post
Share on other sites

The actual description for the cable is: YWDXpek 75 1.0 / 4.8

Resistance of inner conductor: 23.7 Ohm / km

The outer conductor resistance: 17.5 Ohm / km

Capacitance: 57 nF / km, Impedance: 75 ± 3 Ohm,

The inner conductor: copper single wire

Insulation: foamed PE

Outer conductor: braid of tinned copper wires and tape AL / PET / AL

Braid coverage factor: 40%

Share this post

Link to post
Share on other sites

I'm guessing that those two shots of the boom gates are taken through a glass window - if so then 1st mistake. 2nd mistake (as Tom points out) is to be using RG6. I'll start up the broken record ---- RG6 is designed for high frequency RF signal transportation (digital TV etc) and the shielding is optimised for frequencies above 50Mhz. Little consideration is given to shielding of interference below 50Mhz as it is well outside the TV bands but unfortunately falls partly inside the CCTV baseband range of 5.5Mhz.

RG6 can and sometimes does work ok but you wont know til you try it and if it doesnt work your only option is to pull it out and replace it. Best to use the right cable in the first place.


Braid coverage 40% dear oh dear

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this