I was able to pick up some new old stock CRT Units for the 8590E series SAs recently.
So far I have installed 3 of these; in an 8594E, 8591E and 8590L.
The CRT Units seems to be brand new, sealed from Omnivision.
Everything works and I have made the CRT adjustments per Omnivision's instruction sheet.
There is a minor issue that I would like to ask if anyone else has seen.
The CRTs display some evenly spaced bright dots usually aligned over the grid pattern.
This occurs only when the intensity is turned way down. It's strange that of the 3 CRTs I have used so far all three exhibit this.
The old ones did not do this (they had excessive burn on the CRT).
To try one more experiment I took a new CRT tube off a unit that was showing the dots and put the CRT tube into one of the old units.
In other words I put a new tube into the old electronics module and installed this into an SA.
This unit does not exhibit the dots. Even thought it now has a new CRT Tube and old electronics.
It's either something wrong with all the electronics in the new CRT Units or I'm missing some adjustment.
Any comments would be appreciated.
--Victor
So far I have installed 3 of these; in an 8594E, 8591E and 8590L.
The CRT Units seems to be brand new, sealed from Omnivision.
Everything works and I have made the CRT adjustments per Omnivision's instruction sheet.
There is a minor issue that I would like to ask if anyone else has seen.
The CRTs display some evenly spaced bright dots usually aligned over the grid pattern.
This occurs only when the intensity is turned way down. It's strange that of the 3 CRTs I have used so far all three exhibit this.
The old ones did not do this (they had excessive burn on the CRT).
To try one more experiment I took a new CRT tube off a unit that was showing the dots and put the CRT tube into one of the old units.
In other words I put a new tube into the old electronics module and installed this into an SA.
This unit does not exhibit the dots. Even thought it now has a new CRT Tube and old electronics.
It's either something wrong with all the electronics in the new CRT Units or I'm missing some adjustment.
Any comments would be appreciated.
--Victor
I have make the same change off CRT's into HP8591E ,HP8591C and i have no problem's.Just change and power up and all works OK.
Nice to tell you have change the tube into the old electronics, because i have a HP8591A with a different syn rate as the HP8591E/C ,so i think i cant change the tube into the old electronic .
Greeting
Dirk
see message from Mike M
"""""The instruments that you have do not all have the same horizontal sync rates, and they used different monitors.
The 8591C has the same sync rate as the 8591E, which is 15.75 kHz, while the 8591As have a sync rate of 19.2 kHz. So you will need different monitors for each...
The OmniVision monitors you mention are the 15.75 kHz variety and were previously sold by Agilent as part of the 08590-60377 assembly for display replacement.
Best regards,
Mike
Mike M
Agilent Technologies[/b][/i]"""""