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I don't claim to know much about scaler network analyzers, so what I say might be wrong. I don't see how you can consider a *scaler* network analyzer able to characterise S11 and S22, since both S11

If both DMM meet your needs, then the chance it will work coming from unknowns via eBay, and easier to maintain DIY is your goal, the 3456a. If you need more updated features including amps but are

Hi: The most accurate way of characterizing S11 or S22 is to use a scalar network analyzer with a bridge and precision air line. The cal load is a precision load that's just slightly off from 50.0

The HP3468A can be programmed via the HP-IL -- the proprietary Hewlett Packard Interface Loop -- so it can attach to calculators (HP-41C), printers and storage

Dave, Yes, backing up on floppy will save those calibration constants (and other stuff as well). That way, if you have to replace the processor board, you don't have to recalibrate everything. You

This is a good point too, Thanks. Antonio I8IOV

Yes, that would be my next try, though I have to build some suitable extensions for the probe tips in order not to remove the panel. Merry Christmas, Antonio I8IOV

The cal kit the 8753 is supposed to work with is the 85032B - see the 8753 manual. The 85032B needs the extender, as I

If the RPG works better in one direction it may need a small adjustment of the very small set screws on the side of the RPG near the lamp wires. This can serve to balance or direct the light

Excellent point. I agree. Joe

If your RPG is the same as my 8660B the output is 2 square wave chains which lead and lag depending on the direction of travel. You can put your dual trace scope on the outputs and watch the wave

Just sent it direct. Let me know if you do not receive it. Joe

Is that the same data you are supposed to back up to a floppy? The reason I ask, is that the manuals seem to imply this will make restoring the data much quicker if you have it on a floppy in

I sent a message earlier regarding the resistors, but I didn't see it appear here. If this is

Joe, well, as I have some other HP stuff with RPG's, having such an unit as a spare would be a good thing. I already tried reseating the connector with tiny pliers without removing the panel, but had

The RPG's for the HP equipment I am familiar with use a T-1, 5 V, 60 mA, bulb with wire leads. The most common failure is for the bulb to burn out. For an 'intermittent failure', I would wonder

The RPG (rotating pulse generator, i.e. the encoder) of one of my 3586A's doesn't work well. Clockwise it works well, counterclockwise it is erratic. May it be an issue in the encoder itself? I don't

I don't have any of the 608s. I just remember repairing them when I worked as a calibration technician at Rockwell-Collins, Canada. Merchison

On the 8752/8753/8720 etc., and pretty much all newer VNAs, even what you call "uncalibrated" is actually calibrated at the factory or at the service center when you send the analyzer for calibration.

Was sort of like this http://boxen.math.washington.edu/home/kirkby/85032B/all-parts-of-85032-60012.jpg though for 3.5 mm, not N as in this diagram? My own 3.5 mm kit does not have anything like