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> 54502A 400MHZ 400 msa/s 2 chan digital oscilloscope
54502A 400MHZ 400 msa/s 2 chan digital oscilloscope
General Description/Specs What you get:
The HP 54502A Digital Oscilloscope is a general purpose two channel random repetitive and real-time sampling scope with 400 MHz repetitive bandwidth and 400 MSa/s sampler. Real Time bandwidth is 100 MHz. The channels have 1mV to 5V/div sensitivity in a 1-2-5 sequence. Inputs are 50 ohm or 1Meg. The time base provides sweep speed range of 200 psec to 5 S/div in 1-2-5 sequence. I have added a tutorial about scopes at the end of this description.
Performance Characteristics of the 54502A Read all the specs at http://cp.literature.agilent.com/litweb/pdf/54502-90907.pdf The service manual
1. Autoscale to automatically find and display signals
2. 16 automatic pulse parameter measurements
3. Easy waveform storage into memory.
4. Full programmability over HP-IB
5. Hardcopy to external HP-IB printers Via HP-IB and internal firmware.
6. Capture events negative in time from the trigger event
7. Complex trigger (Edge, 3 Ch pattern, state, Delay or TV)
Electronic condition Excellent
I have reconditioned and calibrated this unit. The Unit passes all self tests and passes calibration. I was product support engineer on this product before I retired. Any 545xxA I sell will be fully reconditioned and tested for all possible failures. It will also be fully calibrated. I do not have an ISO traceable cal lab, but any unit I sell will pass calibration at an ISO lab. If you have problems, please contact me for fair resolution. I have parts to support this product.
Choosing the right scope for your application
You need to purchase the right scope for your application. In general the first consideration is bandwidth, but bandwidth is not that simple. You need to be aware of the bandwidth in both the Single Shot / Real Time mode as well as the Repetitive mode.
Repetitive mode In the repetitive mode the waveform is constructed by triggering and acquiring data on successive repeating events. If the particular signal of interest is repetitive like a system clock, then a very accurate waveform can be constructed from repeated acquisitions. Data is randomly captured into a circular buffer through an A/D converter. Then a fine interpolator is used to precisely (40 psec or better) measure the time between the last sample taken and the analog trigger event. Data can now be placed in a memory buffer precisely positioned in time relative to trigger. With successive acquisitions, the buffer is eventually filled. High bandwidth can be achieved with relatively slow less expensive A/D converters.
Real Time / Single Shot mode In this mode, the entire waveform must be captured on a single trigger. Naturally this requires a very high performance FAST A/D converter. The fine interpolator is still used to place data precisely relative to the analog trigger event.
The bottom line on bandwidth If you are trouble shooting and looking for a rare glitch that might cause an error in your system, you need to think about Real Time / Single Shot bandwidth . On the other hand if you are designing a clock distribution system and are looking at repetitive clocks, then repetitive bandwidth will work fine for you.
Bandwidth, Sample rate, channel count, memory depth, and trigger features must all be considered. If you are trouble shooting logic circuits, the complex trigger features will be very important.
Of the scopes I sell, the HP 54501A and the 54503A are optimized to be high bandwidth repetitive scopes. They do have a low bandwidth single shot capability.
The 54502, 54504, and the 54510A/B are the Single Shot scopes designed for Single Shot work. They could easily have 500 MHz repetitive bandwidth like the 54503A but their analog bandwidth has been dinged slightly to prevent aliasing during digital reconstruction. The 54510A has a 1 GSa/s A/D converter so the sample interval is 1 nsec. We like 4 samples per period for reconstruction so a 250 MHz signal (4 nsec period) would be sampled 4 times by a 1 GSa/s A/D.
This is a 6 bit A/D converter. All the others are 8 bits.
**Special feature called sequential capture.
The 54720A/D is a very high performance separate family of scopes see my write up on this line of scopes
Electronic condition excelent
Cosmetic condition Nice solid chassis some minor stains. Display has NO burn in. Nice clean display.
Warranty Contact me for fair resolution on any problem.
Thanks for looking. Feel free to contact me with questions.
Of course not all units can be repaired. I disassemble these units for parts. Agilent has classified many of these units as obsolete and parts are not available from Agilent. I have accumulated many of the obsolete parts and many are listed in my store watronics92 I will run the auto self cal on any unit I sell, but I do not have an ISO certified lab. Any unit I sell will pass calibration at an ISO calibration lab.
