Hantarex 1v/5v switch?

[scumball]

I read this on the Ultimarc website

"Hantarex (and many other) monitors are specc-ed to accept 1 volt or 5 volts (Hantarex have a switch"

Does anyone know where this switch is on a Hantarex Polo 25"?

Thanks

[grantspain]

i have never seen a switch on a polo,maybe on a mtc 9000

[Kevin Mullins]

From the Polo manual:

VIDEO INPUT SIGNAL
RGB positive going with input impednace of 1k ohm. Sensitivty 1.5 - 4.0 V p.p.

SYNC INPUTS
Horizontal and vertical, positive and negative, composite or seperate with automatic selection. Input impedance 1k ohm. Input level 1.5 - 4.0 V p.p.

[scumball]

So could my Xbox AV adaptor and JPAC be pushing the level up too high if that states 5v and the monitor is 1.5v to 4v.

I am trying to get to the bottom of why my picture using this has 'herringbone' wavy lines throughout yet with a Jamma board and PC with AVGA it is okay.

Any ideas?

[grantspain]

can you post a picture,its possible that signal input is so high that its creating flyback lines otherwise it could be some sort of ground fault

[scumball]

It's hard to get a picture as it's quite slight.  It seems like a ground fault as it is ever so slightly wavy with herringbone effect on whites/bright areas. 

The Xbox only has a two pin power lead so no ground there.  It is meant to be grounded through the JPAC but that doesn't seem to be working.

I thought it may be the monitor frame ground, as my Hantarex UPS250 supply doesn't have a FG connector for the monitor, but if the PC with AVGA looks okay and so does the single Jamma board I have, I guess that rules that out.

Any ideas?  Can I ground an Xbox?  Would powering the Xbox from a different socket make a difference?  (I'm UK based)

[grantspain]

i think its probably the xbox vga convertor,its certainly not a fault with the monitor-perhaps it may be the quality of the signal lead

[scumball]

Not using a VGA convertor - am using an Ultimarc XBox AV adaptor which outputs 15KHz RGB to a D15 connector.

[grantspain]

best to contact ultimarc maybe they know whats going on,but whatever it is its either some sort of ground problem or some sort of interference problem-whenever i have encountered these sort of problems its always been down to ground or the cable itself-maybe the cable needs a shield