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I remember designing with PALs, GALs, and CPLDs back in the 80's.? Great for reducing the number of SSI TTL chips on a board, but they were power-hogs, if I recall correctly. I did the programming

I print schematics on a D sized plotter. The schematics from Artek manuals are always excellent quality and print clearly without dropouts or fuzzed lines, even when enlarged. Well worth the very

Thanks George, That's what I was hoping to hear. -- Regards Lou VK3ALB

All of the manuals I’ve purchased from Artek are much better than your example. George

True, a shift register may be all you can get.? Making a counter can be more difficult because you may not have access to the preset lines on the flipflops. I skipped from the 22V10 directly to

The terms are used interchangeably all over the industry, just like the chips. Yup. Which means you know what you're talking about. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

16V8 etc were GAL, not PAL, devices. Erasable, and more flexible architecturally than PAL devices. Used them when I did my first hardware design (professionally I mean). Shows my age I suppose :-/

Hi, Has anyone purchased HP8568B manuals from Artek and if so are the circuits better image quality than the attached example? [image: image.png] Regards Lou VK3ALB

No. The very earliest PALs, like PAL16L8 etc, are combinatorial. But shortly thereafter, 16R8 (etc), the 'R' meaning "Registered", appeared. These are sequential logic devices that store state and

Points that way. Harvey

Looking at the 8340 manual it states that PIN4/10/11/17 are used and corresponding to control bits 3/1/0/2 on the testset , I was looking at the 8516 manual and it shows 4 wires from the rear panel

To start with, the 8516 test set does not use a serial communications scheme. The cable is most likely a parallel cable. Why it was specified as RS-232 is strange, unless the thought was that those

That’s what I thought so the use of a PAL would point towards the control interface indeed being a parallel interface and not serial Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986>

PALs are combinational logic, such as (using address lines)? A4 and A3 and not A2 and A1 and not A0. To decode serial data, you need flip-flops, some storage to convert serial to parallel and then

Thanks for looking. If I should not find the right one in the next few weeks, maybe one with a different print from Your keyboard fits? Best regards Peter

The 8566B is not a standard Beast. The power supply voltages are specified to a much higher accuracy than most instruments you would encounter, and for a reason. For example, the +22V rail is

I know it is labeled RS232 but unfortunately that does not mean a regular RS232 Cable can be used , I looked through the service manual for the 8340B and it indicates the pin numbers on the rear panel

You might a standard RS232 cable. It's labeled " CABLE ASSEMBLY, RS232" in the 8516A S-Parameter Test Set Operating and Service Manual. -George

-- HP8558B Versus HP182T Sweep Fail. Good year 2022 without the accursed bug. Well there everyone In April 2019 my HP8558B decided to let it do the sweep Fig0 , I found that only with external sweep

Hello Peter, Unfortunately , It is not a 8662A keyboard that I have Best regards eric F1GHB http://ecomatrf.free.fr/