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File /HP_Verification_V5-0.zip uploaded #file-notice

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The following files and folders have been uploaded to the Files area of the [email protected] group.

By: Bruce <bruce@...>

Description:
HP 8510 Performance Verification Software VERSION 5.0 05810-10033
Re: HP 8594E low signal level indicated

 

Thanks to both of you. I will open it up tomorrow and check out the attenuator.



On Sat, Feb 25, 2023, 8:47 PM Bruce <bruce@...> wrote:
You would be looking for transmission loss.? If there is a problem?
with the attenuator, it could present very high attenuation.

Safest way to do this is to set the SA for zero attenuation, connect a?
power meter or another SA to the OUTPUT of the 1st SA attenuator and a?
signal generator to the input of the attenuator.? Then cycle the?
attenuator through its various attenuation settings and record the?
results.

A bit more dangerous method would be to inject a signal AFTER the?
input attenuator (I would start quite low -30 or -40 dBm) and see how?
the SA performs.

If the measured attenuation differs from the actual attenuation?
significantly, you have a problem.

Cheers!

Bruce



Quoting Rik Rasmussen <rikrasmussen@...>:

> Are you talking about the HP 8594E's INPUT attenuator? What would I?
> be looking for?
>
>
>








Re: HP 8594E low signal level indicated

 

You would be looking for transmission loss. If there is a problem with the attenuator, it could present very high attenuation.

Safest way to do this is to set the SA for zero attenuation, connect a power meter or another SA to the OUTPUT of the 1st SA attenuator and a signal generator to the input of the attenuator. Then cycle the attenuator through its various attenuation settings and record the results.

A bit more dangerous method would be to inject a signal AFTER the input attenuator (I would start quite low -30 or -40 dBm) and see how the SA performs.

If the measured attenuation differs from the actual attenuation significantly, you have a problem.

Cheers!

Bruce



Quoting Rik Rasmussen <rikrasmussen@...>:

Are you talking about the HP 8594E's INPUT attenuator? What would I be looking for?
Re: Looking for 8510 verification software (08510-10033)

 

"Bruce" <bruce@...> writes:

So were you able to get it installed and working ?
Hm, we seem to be having a slight disconnect here. Did you send me your
copy of the verification software? When you do I can try to get it up
and running.

Thanks!
Matt
Re: HP 8594E low signal level indicated

 

"Rik Rasmussen" <rikrasmussen@...> writes:

Are you talking about the HP 8594E's INPUT attenuator? What would I be looking for?
If the 8590 series uses the same type of step attenuator as a lot of
other HP instruments (8566, 8663, and lots more), the attenuator pads
have a tendency to get stuck and not switch. This can leave a pad
switched in or out, causing an incorrect signal level at its output. In
your case, a pad might be stuck in.

Fortunately, this is very often reparable. A common cause is bad
o-rings. Another common reason is oxidation on the leaf contacts with
the solenoid plunger. I can go into more detail if you'd like and I
think I have pictures showing the internals of these attenuators.

But, I agree with Bruce that a good step, if you can, is to check the
signal level at the attenuator output. If the attenuation doesn't match
what the 8594E is setting it to, then that's at least one culprit.

Matt
Re: Looking for 8510 verification software (08510-10033)

 

Matt -
So were you able to get it installed and working ?

Cheers!

Bruce

Quoting Matt Huszagh <huszaghmatt@...>:

"Bruce" <bruce@...> writes:

I haVE VERSION 5.0 (works best with HP basic v 7.x) - give me a bit
and I'll zip it up and send it to you.
Wonderful, thanks!

Matt
Re: Looking for 8510 verification software (08510-10033)

 

"Bruce" <bruce@...> writes:

So did you install the verification software?
Not yet. Did you send me a copy of yours? If so, for some reason I
didn't receive it.

If so, do you have a verification kit?
Unfortunately that's the part I'm still missing. Though I'd like to
track one down at some point.

Matt
Re: HP 8594E low signal level indicated

 

If I set the IFR to generate 300 mHz at -20 dBm the HP measures it as about -65 dBm.
Re: HP 8594E low signal level indicated

 

The 300 mHZ -20 dBm CAL OUT signal is measuring as about -65 dBm.
Re: HP 8594E low signal level indicated

 

When I connect the CAL OUT to the input it does appear on the spectrum analyzer but at a much lower level than -20dbm.

If I connect CAL OUT to Input on the HP and press the CAL button a message on the screen says CAL SIGNAL NOT FOUND.

If I connect the CAL OUT to my tinySA Ultra it is indicated as -22.8 dbm. So, the CAL OUT signal appears to be OK. But the input to the HP seems to be attenuated.
Re: HP 8594E low signal level indicated

 

Are you talking about the HP 8594E's INPUT attenuator? What would I be looking for?
Re: HP 8594E low signal level indicated

 

It has a calibration sticker dated in 2015.
Re: Looking for 8510 verification software (08510-10033)

 

Matt -
So did you install the verification software? If so, do you have a verification kit?

Cheers!

Bruce

Quoting Matt Huszagh <huszaghmatt@...>:

"Bruce" <bruce@...> writes:

I haVE VERSION 5.0 (works best with HP basic v 7.x) - give me a bit
and I'll zip it up and send it to you.
Wonderful, thanks!

Matt
Re: HP 8594E low signal level indicated

 

Have you checked the output attenuator? If not, take a look at the INPUT to the attenuator.

Cheers!

Bruce

Quoting Ozan <ozan_g@...>:

On Sat, Feb 25, 2023 at 03:15 PM, Rik Rasmussen wrote:


If I set my IFR 1200S for an output level of for example -20 dbm and
connect it to my tinySA, i show a level very close to what the IFR is set
for. If I connect it to my HP 8594E I get a signal level much lower, about
-86 dbm. I have attenuation set at 0 on the HP. I recently acquired this
HP and it seems to work OK except for this. Is there a setting that I am
overlooking, or does this indicate an issue?
If you connect 300MHz -20dBm output from CAL OUT of SA to the input, does SA show ~ -20dBm @ 300MHz? If you set your IFR to 300MHz, -20dBm what does SA show?

Ozan
Re: HP 8594E low signal level indicated

 

On Sat, Feb 25, 2023 at 03:15 PM, Rik Rasmussen wrote:
If I set my IFR 1200S for an output level of for example -20 dbm and connect it to my tinySA, i show a level very close to what the IFR is set for. If I connect it to my HP 8594E I get a signal level much lower, about -86 dbm. I have attenuation set at 0 on the HP. I recently acquired this HP and it seems to work OK except for this. Is there a setting that I am overlooking, or does this indicate an issue?
If you connect 300MHz -20dBm output from CAL OUT of SA to the input, does SA show ~ -20dBm @ 300MHz? If you set your IFR to 300MHz, -20dBm what does SA show?

Ozan
Re: HP transistor equivalent for 1854-0247?

 

"Also the HP stock numbers sometimes got shortened to fit on the smaller parts.

1854-0247 for example might have 4-247 printed on it. It's a 2N3866 with better quality control. "

Ken S


At 11:36 AM 2/25/2023, you wrote:

It an HP8586A.

thanks


Tony

HP 8594E low signal level indicated

 

If I set my IFR 1200S for an output level of for example -20 dbm and connect it to my tinySA, i show a level very close to what the IFR is set for. If I connect it to my HP 8594E I get a signal level much lower, about -86 dbm. I have attenuation set at 0 on the HP. I recently acquired this HP and it seems to work OK except for this. Is there a setting that I am overlooking, or does this indicate an issue?
Re: HP8510 push-buttons

 

Every spring I have removed, or replaced, was covered with a film
of hardened grease. Add a little oil, or alcohol, or other grease
solvent, and it goes away and the action becomes smooth.
The trouble with *that* is that the springs in the keyboards I've taken apart (before I realized I didn't have to) didn't have any noticeable grease on them at all.

The first instrument I fixed with ISP was about 20 years ago. It is
still as smooth as the day I cleaned it with ISP.
That's good to hear, as I still worry a little that the alcohol is removing something that is keeping the springs from rusting. I haven't seen any obvious corrosion or oxidation on those springs either, and would prefer them to stay that way.

-- john, KE5FX
Re: Tracking Generator Board 5062-8282 CLIP

 

What instrument is your TG a part of..?

I put out a similar request a few years back for the 5086-7905 tracking generator, used in the 8593E SpecAn.

Nothing turned up, and my assembly was listed as 'Return to Depot for service'. So, probability is low in finding something, unless a depot service alumni might have a hardcopy in hand.

My particular problem was the ALC loop 'unflatness' that varied with the vernier attenuator level. As attenuation increased to 10dB or so, a 5dB hole would show up around 300 MHz. Flat within 1 dB over full span with minimal vernier attenuation. Don't know if this is a detector problem, or attenuator problem, and need to 'unwrap' the ALC circuitry to figure that out.

So, we are both in need of someone with service experience on these modules to show us the way...

If I get in there again in the future I think I will pull the PCB and photograph both sides for community reverse engineering.

_Dave KC6UPS
Re: HP transistor equivalent for 1854-0247?

 



Clay

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