Category Archives: Analogic

AD584JH chinese voltage reference board

I bought some time ago a cheap AD584JH voltage reference board from the usual online auction site. It is a couple of weeks that the board is powered on and measured by my HP3456A while the temperature of the room … Continue reading

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Solartron 7150 added to the stack

Now the trio of my 5.5 digits or better DMMs is working and logging which means I am out of IEEE 488 cables which means I ordered two more as there is a lot of my equipment that is really asking … Continue reading

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HP 3456A & HP 3457A

I am not dead yet, just very tired. This photo is just to show that something is happening on the DMM side of things. As soon as possible, I want to write about linux-gpib, DMM and logging. A.C.

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Anritsu MS610A repair (faulty 6dB pad)

This repair is my first foray into the almost-microwave realm. So, what was wrong with this SA? I bought it unresponsive to the front keyboard commands. After cleaning the contacts the unit started to be responsive, but the pushbuttons were … Continue reading

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Illness and Happy Easter

I have been rather unwell for the past couple of weeks. I’ve had a fever, cough, fatigue… the works. So no updates in this blog and nothing got done outside this blog. Now I am a bit better but I … Continue reading

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Modding an HP 3488A

I happened to acquire two HP 3488A. They are called Switch/Control unit. That means that each of them can accept up to five different boards that do interesting things. There is a multiplexer, a matrix switch, a digital input/ouput board … Continue reading

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GPIB, voltmeters and voltage references

A new post is long overdue so here it is. As now I am an happy owner of a nice National Instruments GPIB PCI card, barely enough GPIB cables (you never have enough cables and that’s a sad truth), a … Continue reading

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HP3456A: strange behaviour (solved)

The 1000V, 100V, 10V and 1V DCV ranges didn’t work right. The Ohms ranges didn’t work either. The self test didn’t pass (error #4). After reading the service manual I was expecting some problem in the Input Amplifier (a open, … Continue reading

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HP 3470: something is wrong again (bad readings) part 1

Another multi-part post starts now. I already wrote about this measurement system here. That time the problem was the mainframe display module while this time I am rather sure the problem is the plug-on  function module: I checked with a second HP 3470 that found … Continue reading

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Repair: HP 5328A part 3

Let’s keep this series going. In the last episode, our suspect was A2U1 which is HP part number 1826-0065. That’s the way the IC is marked and that is also what is written in the service manual. But I am … Continue reading

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