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The model number
The function(s) listed below. Some instruments have multiple functions - for example, the 4195A is a VNA, spectrum analyzer and an impedance analyzer. Therefore the 4195A is listed in multiple categories

Please also check out HPWiki available here:

Accessory kits - various types
AC power analyzers - PA2201A and PA2203A
AC power supplies 6811C, 6812C, 6813C
Airlines
Arbitrary waveform generators M8194A
Amplifiers?493A, 495A?
Attenuators (optical) 8156A, 8157A, 8158B, 81566A, 81576A,?
Attenuators (RF) 8494A
Attenuator set (500 Ω) 350C
Attenuator set (600 Ω) 350D
Attenuator switch driver
Audio analyzers? 8903A, 8903B, 8903E,? ?
Base station test sets
Bit error rate testers (BERTs)
Cables
Capacitance meters U1701A, U1701B, 4272A, 4278A, 4279A
Capacitor Bridge 4270A,
Capacitor standards 16380A, 16380C,?
Carrier noise test setsi
Cesium frequency standards
Clamp ammeters
Close field probes
Crystal Impedance E4915A, E4916A
Data Acquisition Systems (DAQs)
DC power analyzers
DC power supplies 6030A , 6031A , 6032A, 6033A, 6035A, 6131C, 6621A, 6622A, 6623A, 6624A, 6627A, 6255A, 6645A, 6671A, 6672A, 6673A, 6674A, 6675A, 62003A, 62003C, 62003E, 62004A, 62004B, 62004E, 62005A, 62005B, 62005E, 62006A, 62006B, 62006E, 62010A, 62010C, 62010E, 62012A, 62012C, 62012E, 62015A, 62015C, 62015E, 62018A, 62018C, 62018E, 62024A, 62024C, 62024E, 62028A, 62028C, 62028E, 62048A, 62048C, 62048E
Delay lines
Detectors
Device current waveform analyzers
Digital communications analyzers
Directional couplers
Distortion analyzers 330B, 330C, 330D, 331A, 332A, 333A, 334A, 339A, 8903A, 8903B, 8903E,???
Dynamic measurement DC source
Electrometers
Fading simulators
Femto ammeters
Filters
Frequency counters 522B, 5342A 5343A 5352B
Frequency standards?
- Cesium frequency standards 5090A
- Off-air 60 kHz frequency standards
- Off-air 200 kHz frequency standards
- Off-air GPS frequency standards
- Quartz frequency standards 105A, 105B
Function Generators ? 3310A,? 8165A,
GPIB controllers, extenders, cables etc.
GPS frequency standards
Harmonic mixers
High resistance meters 4339B
- High resistance meter fixtures 16008B
HEV EV Grid Emulators and Test Systems
In-circuit test systems
Impedance analyzers 4195A, 4291A, 4291B, 4395A, 4396A, 4396B, 4294A, E4990A, E4991A
Impedance Analyzer Accessories
- Impedance Test Kit 41951A,?
- Test Fixture Adapter 16099A
- Test Fixture 16034G, 16034H, 16047A, 16191A, 16192A, 16193A, 16093B, 16194A, 16452A,
- Test Head 4291B
Impedance / Gain Phase analyzer 4194A
Impedance Meter 4193A,
Isolators
LCR meters? U1701A, U1701B, U1731A,? U1731B, U1731C, U1732A, U1732B, U1732C, U1733C, 4191A , 4192A, 4194A, 4195A, E4196A,? 4216A, 4260A, 4261A, 4262A? 4263A, 4263B, 4271B, 4274A, 4275A, 4276A , 4277A, 4284A, 4285A, 4286A, 4287A, 4291A, 4291B, 4294A, 4332A, 4342A, 4395A, 4396A, 4396B, E4980A and E4980AL
LCR meter calibration devices? 16380A 42030A? 42090A, 42091A and 42100A
LCR meter accessories
- 2-Terminal BNCs.
  - 41900A, 41901A
- 4-Terminal Pair (BNC connectors)
  - Cable extension 16048A, 16048D, 16048E, 16048G, 16048H
  - DC current bias accessories 42841A, 42842A, 42842B, 42842C, 42843A
  - DC voltage bias accessories 16065A, 16065C,
  - Kelvin clips 16089A, 16089B, 16089C,16089E
  - Lead Components 16047A,16047B, 16047D, 16047E
  - Material 16451B, 16452A
  - Probes 42941A
  - SMD 16034E, 16034G, 16034H
  - 2-port 16096A
- 7 mm (APC7)
  - APC-7 Connector Repair Kit 11591A
  - Binding post 16093A, 16093B
  - DC voltage bias accessory 16200B,
  - Lead components 16092A
  - Material 16453A, 16454A
  - SMD? 16192A, 16194A, 16196A, 16196B, 16196C, 16196D, 16197A, 16198A
LCZ meters? 4276A, 4277A,
Lightwave clock / data receivers
Lightwave converter
Lightwave component analyzer
Lightwave measurement system mainframes
Lightwave polarization analyzers 8509B
Logic analyzers
Nemo wireless network solutions.
Noise and interference test set
Noise figure analyzers
Noise sources 346A, 346B. 346C ,
Matching pads (50 ohm to 75 ohm or similar)
Materials test equipment
Microwave repeaters
Microwave downconverters 70427A
Microwave / THz sources
Milliammeter 428B
Milliohm meter
Mobile communications DC source
Modular instruments
- AXIe
- Data acquisition (DAQ)
- USB
- PXIe
Modulation analyzers
Multimeters 427A, 970A
Optical attenuators
Optical heads
Optical sources
Optical spectrum analyzers
Oscilloscopes 120A, 120AR, 120B, 122A, 130A, 130B, 130BR, 130C, 140A, 140B, 141A, 150A, 150AR, 160B, 180A, 180AR, 180CD, 181A, 181AR, 181T, 181TR, 182C, 182T, 183A, 183B, 184A, 184B, 185A, 185B, 1200A, 1200B, 1220A, 1221A, 1703A, 1707A, 1707B, 1710A, 1710B, 1715A, 1722A, 1725A, 1726A, 1740A, 1741A, 1742A, 1743A, 1744A, 1746A, 1980A, 1980B, 5403A, 6000A, 6000L, 16533A, 16534A, 54100A, 5410B, 54100C, 5100D, 54111D, 54120A, 54120B, 54200A, 54501A, 54502A, 54503A, 54504A, 54520A, 54520C, 54540A, 54540C, 54542A, 54542C, 54600B, 54601A, 54601B, 54602B, 54603B,? 54645A, 54654N, 54710A, 54720A, 54750A, 54825N, E1428,?
Oven controlled crystal oscillators (OCXOs)
Pattern generators
PCM terminal test set
Phase noise measurement
Pico ammeters
Printers 2225
Plotters 7470A, 7475A?
Probes
Protocol analyzers and exercisers.
Power booster test sets
Power meters 431A, 431B, 431C, 432A, 435A, 435B, 437B, 438A
Power splitters
Power supplies
Pulse generators
Q-meters 4342A?
- Q-meter calibration inductors 16470A
Reflection transmission test set
Return loss module (optical)
Relays / switches / switch matrices (optical)
Relays / switches / switch matrices (RF)
Resistor standards 42030A?and 42100A
S-parameter test sets
Scalar network analyzers
SCSI bus preprocessor interface E2324A
Selective level meters 3746A
Semiconductors
Semiconductor parameter analyzers 4145A, 4155B, 4156B,
Signal analyzers
Signal generators / sweep generators / signal sources / oscillators 200CD, 201B, 209A, 204D,? 608A,? 8165A
Software
Source measure units
Spectrum analyzers 4195A,???
Switch control units
SWR meter 415E?
Time interval? counters
Time mark generator 226A
Timing and data state modules
Torque wrenches
Transmitter testers
Trigger modules
Ultrasound transducers
Universal bridge? 4260A, 4265A, 4265B?
Vacuum tube voltmeter 410C
Vector Impedance Meter 4193A, 4800A, 4815A
Vector Network Analyzers (VNAs) 4195A,? 8510A, 8510B, 8510C, 8753A, 8753B, 8753C, 8753D, 8753E, 8753ES, 8752ET, 8719A, 8719B, 8719C, 8719D, 8720A, 8720B, 8720C, 8720D, 8720ES, 8722A, 8722B, 8722C, 8722D, 8722ES,
Vector Network Analyzers (VNA) calibration kits 85032B, 85032E, 85033C, 85033D, 85033E, 85050B, 85050C, 85050D, 85052B, 85052C, 85052D, 85054A, 85054B, 85054D, 85056A
Vector Network Analyzer (VNA) verification kits
Vector Signal Analyzer 89650S, 89600S
Vector voltmeters 8405A, 8508A,
VXI mainframes 70000B, 70000C
Waveform and function generators
Waveguide to waveguide and waveguide to coaxial transitions.
Wireless 58 OTA chambers
Wireless channel emulators
Wireless network emulators
Wireless communication test sets

Re: HP Agilent 8753ES VNA repair [Help]

#150585

Is the test point on the picture correct ??

Re: HP Agilent 8753ES VNA repair [Help]

#150584

Hi Yves,

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

"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 ?

"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?

"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 ?

"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 ??

"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.

"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.

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).

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.

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

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.

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.

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:

chkMacAddr(

?

?

?

?

?

?

?

?

?

?

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

?

?

Copyright 1984-2002 Wind River Systems, Inc.

?

?

?

?

?

CPU: Agilent KOM PPC405, SA27E rev1

Version: VxWorks5.5.1

BSP version: 1.2/0

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

?

?

Bad checksum stored for boot line in NV ram.

?

Calculated 0xfe, stored = 0xff

?

Storing checkSum = 0xfe

?

?

?

Press any key to stop auto-boot...

?1

auto-booting...

?

?

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

?

USBD Initialized.

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

Error loading file: errno = 0x0.

?

Attaching to TFFS... done.

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

Starting at 0x10000...

?

Instantiating /ram0 as rawFs, device = 0x1

Error in boot line:

?

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!

?

I've highlighted the concerning bits in bold.

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

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.

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?

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

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 :) :) :)

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).

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!

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.

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.

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.

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,

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.

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.

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. ?

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? ?

Re: HP Agilent 8753ES VNA repair [Help]

#150573

VNA parameters used ?:?

- Frequency center 100 MHz

- SPAN zero mode?

TP20 (VCO):

RF signal is at 39.100 MHz, -1.3 dBm instead of 39.840 on your board for frequency >16 MHz seems KO ?

RF signal is at 39.280 MHz, -1.3 dBm ?for frequency <16 MHz?

TP16 (VCXO):?

RF signal is at 40.000 MHz, - 5 dBm. Seems OK

TP6:

No signal at 160 KHz but a square signal at 909 Khz. Look KO ?

TP14 (LO2)

RF signal at 10.000 MHz, -8 dBm. Look KO ?

VCO TUNE TP (with frequency start 15 MHz, stop 16 MHz):

Signal is flat and stay at +21V ?Look KO ?

Same result on VCXO TUNE TP (flat signal)

Re: HP 3403C True RMS Voltmeter display fault

#150572

Hey Dave,

According to the manual they're actually both electrolytics.

Thanks for you kind word!

Arnaud.

Re: HP Agilent 8753ES VNA repair [Help]

#150571

OK, great, thank you.?

I will compare my your measurement on my A12 board.?

Re: Manual for HP 466A amplifier

#150569

Artek manuals also have a pdf available for the 466A 00466-90002 ;?

David

Re: HP Agilent 8753ES VNA repair [Help]

#150568

开云体育

Test for CW 100 MHz.

Re: HP Agilent 8753ES VNA repair [Help]

#150567

开云体育

There are some TP to verify on A12 board.

Test for high frequency only for now.? CW FREQ >16MHz

De?: [email protected] <[email protected]> De la part de MattSNE via groups.io
贰苍惫辞测é?: 1 mars 2025 12:58
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] HP Agilent 8753ES VNA repair [Help]

I tried to apply a 10 MHz external reference 1VPP and the problem is the same.?