8510C/8530A Surplus units (UK)

Hi,

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I have accumulated quite a bit of 8530A/8510C stuff over the years. the 8530A stuff? I was going to use to experiment with an antenna range. Realistically it's never going to happen, and all the (heavy) boxes are taking up space at home. I'm looking at letting some of it go if anybody here might be interested.

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85101C Display unit (with 3 PAL chips) and the 8530A firmware loaded.?

8530A microwave receiver

8511A Frequency Convertor

8514B S-Parameter test set

Interconnect Cables x2?

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Also got some spares or repair units

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85101C display unit

8510C? Microwave Receiver

8514B S-Parameter test set

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Due to the size and weight I wouldn't be interested in packing and shipping these, so collection only really And ideally looking to offload as job lots rather than individually.? I'm based in the Midlands (UK), I don't mind travelling a little way to meet someone halfway or deliver them.?

Re: E5052A Power On Test (3.3V Bus Supply)

#150587

Hi Jeremy,

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This is a great win. What is your overall impression of the E5052A?

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I have R& FSPN8 and 53100A but I would like something I can try to push to lower phase noise levels. I need below -120dBc/Hz at 1Hz and below -180 far out.

FSPN8 gets there but very slowly as its references are not ultra low noise level class. And it does not allow to use external references like 53100A or 5052A.

53100A is OK but has some spurs I can't get rid of and I also like all-in-one instruments.

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If you were to stick ULN Wenzels or comparable references on 5052A would you reliably get below -120dB @ 1Hz and -180 far out?

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Thanks

Leo

Re: HP Agilent 8753ES VNA repair [Help]

#150586

Here is a more precise TP16 measurement.?

VCXO is Ok at 40.000 MHz

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Re: HP Agilent 8753ES VNA repair [Help]

#150585

Is the test point on the picture correct ??

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Re: HP Agilent 8753ES VNA repair [Help]

#150584

Hi Yves,

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Thank you for the details. I have some more questions.

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"For high band VCO must be 39.84Mz and VCO at 39.996MHz for lowband <16MHz." --> ?TP20 VCO. This part seems to work in my board.?

"Divider: 4kHz for low frequency and 160kHz for high frequency." --> TP6 This part do no seems to work on my board. Is my divider bad here ?

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"VCXO 40 MHz, your SPAN of Spectrum is to wide, use narrow span to see more detail, VCXO but is working." --> OK I will make a more precise measurement?

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"Test VCXO with input generator 10 MHz with a step of 100Hz…measure at TP VCXO, see picture below test VCXO." --> Do you want me to put an external generator on the external BNC connector and measure the voltage on TP VCXO TUNE ?

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"Divider to 160kHZ works but bad frequency." --> TP6. I don't understand why you said it is working. If my 40 MHz is OK why do I have a 909 KHz output instead of 160 KHz output ??

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"For CW 10MHZ, LO2 TP14 will be 10.4MHz…for low frequency it’s OK." --> TP14 this part do no seems to work on my board.
- I have 10.4 MHz for 100 MHZ/SPAN 0 parameter on the VNA.

- I have 10.720 MHz for 10 MHZ/SPAN 0 parameter on the VNA.

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"No DC correction for PLL of VCO…defective phase comparator, integrator or mixer…and 21V is very high voltage."

Yes this part seems to be completely off. I just measure it again this morning.

- A flat -1.5V on VCO TUNE TP

- A flat +21V on VCXO TUNE TP

Agilent MSO6014A Not Booting

#150583

Evening all. I'm new to the group and appreciate all the advice and wisdom on here. I'm now needing some assistance with an Agilent MSO6014A not booting up.

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I bought the 'scope, around year ago, second-hand off eBay. Analogue channels don't work properly (that's for another day), but digital channels work fine (even got the logic analyser pods included in the sale).

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I've been using it in logic analyser mode the past week to debug SPI on an MCU, powering off the 'scope between uses and powering it on the following day with no problems.

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Powered 'scope off yesterday afternoon using the front-panel power button, and later turned it on again and it won't boot.

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The only thing I did differently when powering off this time around, was to save the setup I was using for debugging to the internal (C:\setups) memory. It didn't auto-save a couple of days ago so didn't want to have to set up all the digital channels again if it happened again this time around.

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I've tried doing the emergency restore procedure from USB drive using sys6000.bin (v6.20, from EEVblog forum, unmodified) and sys6000.jzp, lib6000.jzp, lpk6000,jzp, gsp6000.jzp (from Keysight website, all latest versions) but no luck.

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I connected to the debug UART using the details in on the EEVblog thread to see what is going on and got the following boot log:

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chkMacAddr(

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? ? ? ? ? ? ? ? ? ? ? ? ? ? VxWorks System Boot

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Copyright 1984-2002 Wind River Systems, Inc.

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CPU: Agilent KOM PPC405, SA27E rev1

Version: VxWorks5.5.1

BSP version: 1.2/0

Creation date: Oct 5 2006, 09:45:26

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Bad checksum stored for boot line in NV ram.

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Calculated 0xfe, stored = 0xff

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Storing checkSum = 0xfe

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Press any key to stop auto-boot...

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auto-booting...

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boot device : tffs;usb

unit number : 0

processor number : 0

host name : boot

file name : sys6000

inet on ethernet (e) : 0.0.0.0

host inet (h) : 0.0.0.0

user (u) : target

ftp password (pw) : target

flags (f) : 0x8

target name (tn) : target

other (o) : emac0

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USBD Initialized.

Searching for USB device .... Could not find USB device.

Error loading file: errno = 0x0.

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Attaching to TFFS... done.

Loading /tffs0/bin/sys6000.bin... 10678464

Starting at 0x10000...

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Instantiating /ram0 as rawFs, device = 0x1

Error in boot line:

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machine check

Exception next instruction address: 0x00397f00

Machine Status Register: 0x00029200

Condition Register: 0x40000044

Bus Error Address Register: 0x22204002

Bus Error Syndrome Register: 0x00000000

Task: 0x1fffd30 "tRootTask"

0x1fffd30 (tRootTask): task 0x1fffd30 has had a failure and has been stopped.

0x1fffd30 (tRootTask): fatal kernel task-level exception!

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I've highlighted the concerning bits in bold.

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Even with the USB inserted, the 'scope detects it and loads sys6000.bin properly, but still fails on Error in boot line: machine check.

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I noticed that the bootargs on my 'scope differed from those in the boot log from another EEVblog forum user's post, so tried changed them to match (host name : bootHost, target name (tn) : a-m6014a-[also tried a-d6014a-]) but still no luck - boot still fails on the machine check.

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Looking at the boot log and NVRAM error, and the fact that the 'scope failed to auto-save setup a couple of days ago, I'm wondering if it's an NVRAM/checksum issue, which is also causing the machine check to fail?

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Is there a procedure to re-init the NVRAM on the MSO6000 series, or any other suggestions as to what to try next?

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Thanks in advance for any advice!

Re: E5052A Power On Test (3.3V Bus Supply)

#150582

Great!? That's the best kind of repair; when you learn something in addition to getting it working again.

Jim Ford

Laguna Hills, California, USA

On Saturday, March 1, 2025 at 05:43:25 AM CST, jmr via groups.io <jmrhzu@...> wrote:

It's all OK now, I took it apart and fixed it :) :) :)

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On the DSP/ADC module A3 the 5V rail is now 4.97V (was 4.70V typical) and the 3V3 rail is now 3.24V (was 2.97V and very drifty).

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I disassembled the main firmware and worked out how it does the power on testing of the power supplies and this gave me the pass/fail limits for all the supplies.?

I was able to trace through the power supply distribution and see where it was losing voltage in a poor connection. A thermal camera helped a lot here. It's now all fixed and fine again!

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I also found out a few things about how it manages the internal 10 MHz reference and how to adjust the high stability 10 MHz OCXO. So that is now calibrated.

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I am so pleased, I thought it was slowly dying on me. There's no way I could afford to send it to Keysight for repair.

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I should be able to fix the other E5052A as well as it has a similar issue with a sagging 5V and a sagging 3V3 supply.

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Re: Manual for HP 466A amplifier

#150581

Scan sent to wb2uaq.?

Incidentally, there should not be DC on the output—100 uf capacitor C18, in series with 39 Ohm resistor R35, connects the emitter of emitter follower Q7 to the output BNC socket. C18 should block the DC seen at Q7 emitter (-9.6VDC); perhaps C18 is shorted.

I've found my 466A to operate just fine on a pair of 9V transistor batteries. I wire battery tabs to the original mercury battery terminals and hold the 9V batteries in place with double-sticky foam tape. The 466A is thus totally isolated from anything other than the source and the load.

Paper original will be sent to Dave McGuire on Monday.

Show quoted text

On Sat, Mar 1, 2025 at 2:42?PM WB2UAQ via <pschuch=[email protected]> wrote:

Thanks David!? ? I replied to Jeremy.? ? ?

Re: HP 8660B/86602B developed output stability problem, getting-started suggestion(s) request

#150580

Back on this after a short break.

I'm experiencing what Gary Appel described a few posts back. The SL1 VCO module on an extender (per prior photo) can be adjusted (two potentiometers, one controlling detector voltage into the VCO, other controlling pretune DAC into the VCO) to lock across it's working range (the output of the 20-30 MHz signal at 11707A output), however, once back in position (no extender), the wandering problem returns. The reactive parts (varactor, trimmer cap and solenoid inductor) are "up close and personal" and possibly affected by proximity to the enclosure walls.

One observation (admittedly with the VCO module on it's extender) is that the VCO control voltage (coming out of SL1 phase detector, which goes to the SL1 VCO) seems to be working within a range of about -3.2 volts (below which the PLL never locks) and -1.2 volts (above which the PLL never locks. Not sure if this is a problem in the phase detector or perhaps the VCO is far off it's normal range due to (absence of) enclosure effects.

The adjustments section (5-33) begins with "set frequency to 5.55 MHz and adjust (two potentiometers on the VCO) for 0 volts at the test point (VCO control voltage) - this was not possible in any setting of the two potentiometers on the VCO module. Although I could find settings (of the two VCO module potentiometers) that would maintain lock across the 20-30 MHz range (11707A output port reflecting the composite low-frequency synthesizers), this was done with the A19 VCO board on an extender. When lock fails, the phase detector digital logic waveform (a duty cycle which gets smoothed into a continuous tuning voltage) ends up at 0% or 100% duty cycle. All of this provides a nice "moving parts" view of a PLL, but is indicative of a component-level problem probably on the phase detector or VCO module.

Advice received at this point will guide my next attempt (boards back in their shielded enclosures and test points accessed from the motherboard rather than equivalent points on the two boards themselves (the advice re measuring an enclosed test point is appreciated!)

Re: HP Agilent 8753ES VNA repair [Help]

#150579

开云体育

Sorry for delay,

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For high band VCO must be 39.84Mz and VCO at 39.996MHz for lowband <16MHz.

Divider: 4kHz for low frequency and 160kHz for high frequency.

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VCXO 40 MHz, your SPAN of Spectrum is to wide, use narrow span to see more detail, VCXO but is working.

Test VCXO with input generator 10 MHz with a step of 100Hz…measure at TP VCXO, see picture below test VCXO.

Divider to 160kHZ works but bad frequency.

For CW 10MHZ, LO2 TP14 will be 10.4MHz…for low frequency it’s OK.

No DC correction for PLL of VCO…defective phase comparator, integrator or mixer…and 21V is very high voltage.

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Re: HP 3403C True RMS Voltmeter display fault

#150578

On March 1, 2025 4:43:06 PM "AArnaud via groups.io" <a.cabiyaud@...> wrote:
According to the manual they're actually both electrolytics.
Thanks for you kind word!  Can you post a picture of these capacitors?

               -Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

Re: HP 8660B/86602B developed output stability problem, getting-started suggestion(s) request

#150577

When I worked on the 8660's and plugins more than 25 years ago, I had short lengths of bus wires with smaller gauge wire soldered to them and then they covered with heat shrink.? This allowed connections to be made with the boards inserted and with their covers secured.? ?With the lighter gauge wire soldered along side the heavier gauge wire, this created a shoulder that kept these probes from falling inside.? ?All I can remember was using a scope to adjust to adjust a waveform for symmetry as the frequency was stepped.? ?

Re: HP Agilent 8753ES VNA repair [Help]

#150576

My VCO frequency is wrong is should be 39.840 MHz. 39.840 MHz divide by 40 is 996 KHz.

I have a VCO frequency of 39.100 MHz. Divide by 40 : 977 KHz. -> The 2sd LO frequency I have. ?

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Can I manualy tune this VCO or does it depend of another part of the circuit ? It this problem related with the LO2 TP14 signal ?

Re: Manual for HP 466A amplifier

#150575

Thanks David!? ? I replied to Jeremy.? ? ?

Re: Manual for HP 466A amplifier

#150574

Thanks Jeremy!? ?A scanned copy of the schematic diagram would be much appreciated.? ?

My email is wb2uaq@.... ? ?

Maybe I can scan in something for you from my collection of manuals if you are looking for something that isn't readily available.? ? I don't have a listing of what I have.? ? ?My largest set of manuals covers the HP141T and the spectrum analyzer plugins.? ?Might be pretty complete as it came out of HP's repair center in Rockaway, NJ that was shut down when the service centers were consolidated out to CA.

Best regards,

Pete? ?