CHECK OUT THE WIKI The purpose of the wiki is mainly to allow you to find information on instruments, either from either
- 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 ¦¸) 350C
- Attenuator set (600 ¦¸) 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?
- 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 / 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.
- 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)
- 2-Terminal BNCs.
- 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
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Re: HP34702A Ohms converter issues
Greg, I have some 1855-0412s on hand. If you'd like one, please send me a PM. Joel Setton
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Joel Setton
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#94346
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Re: HP34702A Ohms converter issues
Greg,? ? ? ? ? ? This meter was designed before electronic calibration where gain and offset constant are stored in memory to correct for circuit imperfections.? ?The first DMM Hp produced
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[email protected]
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#94345
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Re: VNA advice wanted
I bought three APC7 cal kits with them in, but I have seen the extractors on eBay. I guess the biggest problem is that 99.9¨G of people would not know what one is, so its anyone's guess how they
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#94344
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Re: HP34702A Ohms converter issues
Seconded...reading every word of this thread with great interest! -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Dave McGuire
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#94343
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Re: HP34702A Ohms converter issues
Just looked, according to my inventory I have one 1855-0412 in stock, I¡¯ll have to check on Friday Regards, Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada,
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Stephen Hanselman
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#94342
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Re: HP34702A Ohms converter issues
Can you give me the HP part numbers you need? It is possible we have them in stock, but if HP bought them I have a copy of the ¡°purchased parts¡± database and it generally lists most of the specs
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Stephen Hanselman
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#94341
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Re: HP34702A Ohms converter issues
I finally looked at the manual and was surprised as I haven¡¯t seen one of these for almost 40 years, ahhh the memories. Having said that if you have an issue in the primary power supply in the
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Stephen Hanselman
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#94340
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Re: HP34702A Ohms converter issues
From observations that different parts for Q11 seem to change the behavior, I'd say the JFET type is the issue. Also, the 2N3904s standing in for Q13 and Q14, with no effect, reinforces Q11 as the
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Ed Breya
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#94339
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Re: HP34702A Ohms converter issues
Good morning Greg, The pinch-off voltage of Q11 is critical. SInce its source sits at approximately -4.8V (which is equal to -6.2 plus the summed Vbe's of Q14 and Q13), its gate will be at
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Joel Setton
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#94338
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Re: HP34702A Ohms converter issues
Greg,? I made an error in reading the schematic and now rewriting my comment.? Most of the comment is correct as written.? The change is in the operation of the 10 Meg range and the voltage at the
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[email protected]
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#94337
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Re: HP34702A Ohms converter issues
I have not read the previous comments other than Greg's original post and will read them during a break to see what you have done.? But first read my analysis of the circuit and let me know if that
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[email protected]
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#94336
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Re: HP34702A Ohms converter issues
FN2960 sounds like and old Fairchild part number, They used a ceramic body with a drop of epoxy, or molded plastic cases. They used their trademark, a styleized 'F' as part of the part number. Michael
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Michael A. Terrell
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#94335
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Re: HP34702A Ohms converter issues
George, Thanks so much for chiming in!? As an engineer, my fellows and I had the utmost respect for what HP's designers were able to accomplish and getting info straight from the source is a rare
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gregdunn@...
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#94332
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Re: HP34702A Ohms converter issues
The NTE part has max value for Vgs(off) of -10V. NSN 5961-00-615-7002 shows part numbers including FN2960 and 1855-0412. It has '3.0 maximum gate to source voltage' which I assume is the same
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Orin Eman
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#94331
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Re: Unleveled E4436B
Hi Tim, Nice. Interesting that it is that accurate at 4GHz after the conversion. I have more than several of these generators and I think they are great. I noticed on mine that if you do a hard reset
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Tom B
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#94330
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Re: HP34702A Ohms converter issues
That's weird - I thought I saw another response to this thread but when I refreshed the page, it disappeared!? :-(
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gregdunn@...
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#94328
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Re: HP34702A Ohms converter issues
I put a pair of 2N3904 in for Q13-14 - no change unfortunately.? :-( Yes, it's hard to figure out what Q11 needs to be - HP lists 'FN2960' as an equivalent but that doesn't come back with a match for
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gregdunn@...
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#94327
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Re: HP34702A Ohms converter issues
I was just looking back at the schematic and OP - I see that you reported Q11 was bad and replaced, but not with the same type. This could be the problem, since JFETs all work more or less the same,
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Ed Breya
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#94325
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Re: HP34702A Ohms converter issues
If U2 is railed negative, then Q11 should cut off. Are the parts in sockets? If so, try pulling Q13, which should drop the gain and the current to a very low value. If there's no effect, then try Q14.
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Ed Breya
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#94324
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Prologix has updated the EZGPIB file and is working on the C++ example.
The title says it all. You will find many examples in the folder when you download it. Just click on EZGPIB.exe to run. Investigate the?DF6JB Plotter as well. No affiliation, I just like this
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peter bunge
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#94323
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