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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:
This 54502A comes ready to use one P6100 100 MHz 10:1 passive probe and a power cord. The Scope has passed all the self tests and is fully calibrated. On a scale of 1 to 10 cosmetically, I would give it 9. I have reconditioned this unit. The fan is quiet. It looks good. Look closely at the pictures to glean some of the functionality.
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.
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)
I have reconditioned and calibrated this unit. The Unit passes all self tests and passes calibration.
1. The 50 Ohm input can be blown open by careless users (1Meg ohm input works fine. This is not an obvious failure)
2. The FET DC restore path can be blown out. (only passes AC signals. You may not see this failure on HF signals.)
I was product support engineer on this product before I retired. Any 545xxA I sell will be fully reconditioned and tested for all these 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.
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.
The bottom line on bandwidth If you are trouble 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 logic circuits, the complex trigger features will be very important.
** 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 Excellent. Passes all selftest. Calibrated. I cleaned it up inside and out.
