HP 1331A X-Y display blanking
Has anyone got a manual for an HP 1331A X-Y display? It's a storage-tube device, and I'm curious to know if there's a way of triggering the erase function remotely rather than having to physically prod the erase button on the front. The rear just has X-Y-Z inputs, and I *think* that X-Y are supposed to be in the order of +/- 1V, while Z is the intensity with 0V being full and around 1V being off. Maybe throwing a negative voltage at Z erases, or something, though. cheers Jules
Re: HP 1331A X-Y display blanking
On 04/29/2017 10:31 AM, Pete Lancashire wrote: I don't but. If there is not a connector on the back, you will need to route the signal to one. Find the erase button and look at the voltages. The "erase" signal will either be grounded to function or will be raise to a voltage level +5 or +12 for example. Once you have that, all you need is a 2 wire connector, a 1/8" audio for example. [GAH, re-send because 'reply' seems to go to the individual poster now instead of back to the list... ugh :/ Sorry Pete, you're getting two copies ] Yeah, I'd thought about doing that, too - but then I wondered if pulling the Z axis negative triggered the erase; that would seem like a neat way of doing it. I suppose that might be functionality I could add myself, too, and would avoid having to modify the external panels in any way - however space inside the case is extremely limited. There are manuals on Ebay but for something this simple it is your call. We need a bitsavers equivalent for test equipment! :-) cheers Jules
Re: HP 1331A X-Y display blanking
I don't but. If there is not a connector on the back, you will need to route the signal to one. Find the erase button and look at the voltages. The "erase" signal will either be grounded to function or will be raise to a voltage level +5 or +12 for example. Once you have that, all you need is a 2 wire connector, a 1/8" audio for example. There are manuals on Ebay but for something this simple it is your call. On Sat, Apr 29, 2017 at 8:13 AM, Jules Richardson via cctalk < cctalk@classiccmp.org> wrote: > > Has anyone got a manual for an HP 1331A X-Y display? It's a storage-tube > device, and I'm curious to know if there's a way of triggering the erase > function remotely rather than having to physically prod the erase button on > the front. > > The rear just has X-Y-Z inputs, and I *think* that X-Y are supposed to be > in the order of +/- 1V, while Z is the intensity with 0V being full and > around 1V being off. Maybe throwing a negative voltage at Z erases, or > something, though. > > cheers > > Jules > > >
