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HP 8920A_ B CRT VIDEO OUTPUT
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Richie Thompson
开云体育Is there a converter of some sort to allow me to use a more common video monitor like my Panasonic TR990c on my HP8920B? Below are examples from the manual of monitors to use. ? CRT VIDEO OUTPUT A multi-sync monitor must be used to match the video sync rate of 19.2 kHz. Examples of this type of monitor include - Mitsubishi Diamond Scan, NEC 3D, Leading Edge CMC-141M, and Sony CPD-1302. ? Thanks, Rick T |
开云体育Rick
-
?
With
the proliferation of computers over the last 20 years, I suspect we've reached a
point where no type of?CRT monitor is more prevalent?than the now
garden variety "multi-sync" computer monitors similar to?those given in
your example.? The 19.2kHz requirement is met by almost any PC and MAC
computer monitor manufactured today.? Depending on your location, you can
probably pick up an appropriate used 14"=15" monitor for a price ranging from
$25 to free.
?
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Greg
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Richie Thompson
开云体育What about interfacing them. Monitors today have 15 pin connectors while the 8920 have BNC? Rick T ? -----Original Message-----
From: Greg Werstiuk [mailto:greg_werstiuk@...] Sent: Sunday, August 08, 2004 2:04 AM To: hp_agilent_equipment@... Subject: RE: [hp_agilent_equipment] HP 8920A_ B CRT VIDEO OUTPUT ? Rick - ? With the proliferation of computers over the last 20 years, I suspect we've reached a point where no type of?CRT monitor is more prevalent?than the now garden variety "multi-sync" computer monitors similar to?those given in your example.? The 19.2kHz requirement is met by almost any PC and MAC computer monitor manufactured today.? Depending on your location, you can probably pick up an appropriate used 14"=15" monitor for a price ranging from $25 to free. ? - Greg
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demianm_1
Unfortunately the lowest sync frequency supported today is 30 KHz in
new monitors. (I just checked the Viewsonic and NEC sites to confirm this.) I ran into this a few years ago when trying to connect a large CRT to an HP 8752C for a trade show. I found a montor then with some hunting through some surplus stores. The lower frequency will be the hard part. You may be able to find a discarded workstation monitor from the mid 80's like I did. Possibly you can modifiy a montor to work but that is very uncharted territory. You can buy BNC to VGA cables online. -Demian --- In hp_agilent_equipment@..., "Greg Werstiuk" <greg_werstiuk@m...> wrote: Rick -suspect we've reached a point where no type of CRT monitor is more prevalentthan the now garden variety "multi-sync" computer monitors similar to thosegiven in your example. The 19.2kHz requirement is met by almost any PC and MACcomputer monitor manufactured today. Depending on your location, you canprobably pick up an appropriate used 14"=15" monitor for a price rangingfrom $25 to free. |
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Good point. I haven't shopped for a new monitor for a couple of years and
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hadn't noticed the change in the minimum supported frequency. Plenty of decent used older multi-sync products readily available on the used market which can do the job. - Greg -----Original Message-----
From: demianm_1 [mailto:demianm@...] Sent: Sunday, August 08, 2004 7:53 AM To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] Re: HP 8920A_ B CRT VIDEO OUTPUT Unfortunately the lowest sync frequency supported today is 30 KHz in new monitors. (I just checked the Viewsonic and NEC sites to confirm this.) I ran into this a few years ago when trying to connect a large CRT to an HP 8752C for a trade show. I found a montor then with some hunting through some surplus stores. The lower frequency will be the hard part. You may be able to find a discarded workstation monitor from the mid 80's like I did. Possibly you can modifiy a montor to work but that is very uncharted territory. You can buy BNC to VGA cables online. -Demian --- In hp_agilent_equipment@..., "Greg Werstiuk" <greg_werstiuk@m...> wrote: Rick -suspect we've reached a point where no type of CRT monitor is more prevalentthan the now garden variety "multi-sync" computer monitors similar to thosegiven in your example. The 19.2kHz requirement is met by almost any PC and MACcomputer monitor manufactured today. Depending on your location, you canprobably pick up an appropriate used 14"=15" monitor for a price rangingfrom $25 to free. Yahoo! Groups Links |
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Dave Haupt
Hmmm....
Certainly, the specs for new monitors don't go as low in frequency as older monitors. However, I recently brought up a very ancient PC that only delivered 320 X 240, and required that super-low frequency, and a one-year old Optiquest monitor displayed it just fine. There is one more technical item facing us with the older equipment. The old "unix" standard for video output used three connectors. RGB stood for Red, Green and Blue. Where are the sync signals? Both vertical and horizontal sync signals are on the green signal. The PC standard is for horizontal and vertical sync to be separate signals. Therefore, a standard VGA interface uses five signals, while an old unix type VGA interface used three, with both syncs combined with the green signal. I've never met a multi-sync monitor that would not automatically handle sync-on-green, so this may be of minor importance, or none at all. And finally, there were two standard video drive levels - 0.7Volts peak and 1 volt peak. Again, I think most monitors would handle either, and you possibly had to make a selection from the on-screen menu. In all cases, the interface impedance is 75 ohms per signal, at least if the interface is younger than the first 640 X 480 VGA systems. I tend to agree that a trip to a used computer place, to find a 14-15 inch monitor that'a about ten years old, is a good place to find a monitor that's more likely to work. Or, if you want to get one that's sure to work, find an HP A4033A or A4331A on ebay - they sell for less than $100, in fact shipping will be more because they're 19" 70 pound Sony Trinitrons. They are old unix monitors, and have BNC inputs. The A4033A also has a VGA connector input, so you can use it with either cable type. 73, Dave W8NF Date: Sun, 08 Aug 2004 14:53:14 -0000 From: "demianm_1" <demianm@...> Subject: Re: HP 8920A_ B CRT VIDEO OUTPUT Unfortunately the lowest sync frequency supported today is 30 KHz in new monitors. (I just checked the Viewsonic and NEC sites to confirm this.) I ran into this a few years ago when trying to connect a large CRT to an HP 8752C for a trade show. I found a montor then with some hunting through some surplus stores. The lower frequency will be the hard part. You may be able to find a discarded workstation monitor from the mid 80's like I did. Possibly you can modifiy a montor to work but that is very uncharted territory. You can buy BNC to VGA cables online. -Demian --- In hp_agilent_equipment@..., "Greg Werstiuk" <greg_werstiuk@m...> wrote: Rick -years, I suspect we've reached a point where no type of CRT monitor is moreprevalent than the now garden variety "multi-sync" computer monitorssimilar to those given in your example. The 19.2kHz requirement is met by almostany PC and MAC computer monitor manufactured today. Depending on yourlocation, you can probably pick up an appropriate used 14"=15" monitor for aprice ranging from $25 to free. __________________________________ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. |
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It seems most of the monitors sold today have Horizontal frequency specs
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which start at 30kHz. Probably wouldn't function well if at all at 19.2kHz. Some other sync options exist(ed) as well but it's been too many years since I product managed monitors and I don't remember the mix. In addition most of the of the monitors use with engineering/CAD computer systems, typically running Unix, were fixed frequency models. Remember the run of surplus, fairly inexpensive 19-21" monitors available maybe 10 years or so ago? To use with a PC required the purchase of special video cards. - Greg -----Original Message-----
From: Dave Haupt [mailto:emailw8nf@...] Sent: Monday, August 09, 2004 7:02 PM To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] Re: HP 8920A_ B CRT VIDEO OUTPUT Hmmm.... Certainly, the specs for new monitors don't go as low in frequency as older monitors. However, I recently brought up a very ancient PC that only delivered 320 X 240, and required that super-low frequency, and a one-year old Optiquest monitor displayed it just fine. There is one more technical item facing us with the older equipment. The old "unix" standard for video output used three connectors. RGB stood for Red, Green and Blue. Where are the sync signals? Both vertical and horizontal sync signals are on the green signal. The PC standard is for horizontal and vertical sync to be separate signals. Therefore, a standard VGA interface uses five signals, while an old unix type VGA interface used three, with both syncs combined with the green signal. I've never met a multi-sync monitor that would not automatically handle sync-on-green, so this may be of minor importance, or none at all. And finally, there were two standard video drive levels - 0.7Volts peak and 1 volt peak. Again, I think most monitors would handle either, and you possibly had to make a selection from the on-screen menu. In all cases, the interface impedance is 75 ohms per signal, at least if the interface is younger than the first 640 X 480 VGA systems. I tend to agree that a trip to a used computer place, to find a 14-15 inch monitor that'a about ten years old, is a good place to find a monitor that's more likely to work. Or, if you want to get one that's sure to work, find an HP A4033A or A4331A on ebay - they sell for less than $100, in fact shipping will be more because they're 19" 70 pound Sony Trinitrons. They are old unix monitors, and have BNC inputs. The A4033A also has a VGA connector input, so you can use it with either cable type. 73, Dave W8NF Date: Sun, 08 Aug 2004 14:53:14 -0000 From: "demianm_1" <demianm@...> Subject: Re: HP 8920A_ B CRT VIDEO OUTPUT Unfortunately the lowest sync frequency supported today is 30 KHz in new monitors. (I just checked the Viewsonic and NEC sites to confirm this.) I ran into this a few years ago when trying to connect a large CRT to an HP 8752C for a trade show. I found a montor then with some hunting through some surplus stores. The lower frequency will be the hard part. You may be able to find a discarded workstation monitor from the mid 80's like I did. Possibly you can modifiy a montor to work but that is very uncharted territory. You can buy BNC to VGA cables online. -Demian --- In hp_agilent_equipment@..., "Greg Werstiuk" <greg_werstiuk@m...> wrote: Rick -years, I suspect we've reached a point where no type of CRT monitor is moreprevalent than the now garden variety "multi-sync" computer monitorssimilar to those given in your example. The 19.2kHz requirement is met by almostany PC and MAC computer monitor manufactured today. Depending on yourlocation, you can probably pick up an appropriate used 14"=15" monitor for aprice ranging from $25 to free. __________________________________ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. Yahoo! Groups Links |
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