What you get… This 54520A has been refurbished. I cleaned it up inside and out. New battery! NO Burn CRT! What you see in the pictures is what you get (excluding the test board). One 10441A 500 MHz 10:1 probe with ground lead is included. Study the pictures to glean more about functionality. I have updated the software to Rev 3.2. With this software you can save the screen to a DOS .tif file then print on your PC to get hardcopy. Or use internal firmware HP-IB to print to older HP printers. General Description/Specs… 54520A (high sample rate model)Two channel 500 MHz 1 GSa/s oscilloscope with waveform math, FFT, disk drive, memory bar for deep memory and more. Maximum Sample Rate 1 GSa/s (1 CH on), 500 MSa/s (2 CH on) 500 MHz (equivalent time) Two channels on 250 MHz (Real Time Bandwidth (1CH on) 125 MHz (Real Time Bandwidth (2CH on) Record Length 32,768 pts (real time) maximum 501 pts (repetitive) Resolution 8 bits, 10 bits via HP-IB with averaging In sequential mode you can can capture a sequence of 384 1000 point waveforms. (time lapse capture ... use a pacer?) Sensitivity 1 mV/div to 5 V/div Horizontal Specifications Time Base Range 500 ps/div to 5 s/div Resolution 10 ps Complex trigger See the data sheet http://www.home.agilent.com/upload/cmc_upload/All/EPSG084440.PDF Electronic condition…Excellent… I have reconditioned and calibrated this unit. I replaced the Lithium battery. The Unit passes all self tests and passes calibration. Cosmetic condition… On a scale of 1 to 10 this one is a 9+. See pics of actual unit. Shipping and Handling… I will add shipping to your invoice based on location. I charge only for the actual shipping cost. I ship UPS ground if in the USA. International shipping (some countries are NOT possible) Contact me for shipping cost. If international, I ship USPS express mail. On heavy items I would prefer to ship to you on your DHL account. If not your DHL account, I can ship USPS express mail international but only if the item conforms to size limitations set by your countries’ customs. (Example… Germany has a limit of 108 inches of girth + length). Some countries have the limit at 96 inches. Warranty… Contact me for fair resolution on any problem. Thanks for looking. Feel free to contact me with questions. About Watronics… I am a retired (35Year) HP/Agilent Oscilloscope design engineer. I buy HP/Agilent scopes on EBAY that are in need of repair. If they are listed as; “parts only”, “Condition unknown”, or “as is”, I bid. I then recondition them such that they pass all self-test and pass calibration. I clean them up inside and out, check the batteries, and generally list them as refurbished. 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. Choosing the right scope for your application You need to purchase the right scope for your application. In general the first consideration is bandwidth. If a scope’s bandwidth is specified at 500 MHz, then that means that it will have a flat response over a frequency spectrum from DC to the specified bandwidth limit. Of course it is not flat to the very high limit. The spec’d upper bandwidth limit is the point at which the scope response is at minimum .707 of the actual signal level. Ideally the upper bandwidth roll off is Gaussian at 6 db per octave. 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 in 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 samples taken and the analog trigger event. Data can now be placed in a memory buffer precisely positioned in time. With successive acquisitions, the buffer is eventually filled. High bandwidth can be achieved with relatively 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”. One trigger for one full waveform! 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. I would rate trigger features as the second most important feature. Can you trigger on a narrow pulse or a glitch that is a rarely occurring event? Pattern and glitch trigger are essential if you are doing any serious trouble shooting. Do you really need 4 channels? If not you will pay a premium for something you may never use. The attenuators on the front end are expensive, and yes it is worth it if you need it. Let’s say you are measuring setup and hold on a flip flop. You need to see input, output and clock. That’s three! Of all the scopes I sell, the HP 54501A and the 54503A are optimized to be high bandwidth repetitive scopes. They do have a low single shot bandwidth capability. The 54502, 54504,5,6,54510A/B and 54512B 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 limited slightly to prevent aliasing during digital reconstruction. For example, the 54510A\B have 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. Note in the table that some scopes are BOTH single shot and repetitive. I would also note that the 546XX series has a user interface with lots of knobs on the front panel. This design satisfies the users who like direct control knobs on the front panel and are familiar with the old analog scopes. In the old analog designs, direct access to circuits was necessary to give user control. The newer digital designs allowed designers to escape the mechanical restraints like the mechanical shafts and rotary switches of analog scopes. The 545XX series uses more soft keys and knobs for direct access to most used controls like trigger level. Model Repetitive bandwidth Single Shot Bandwidth Sa/s Chans Adv Trig FFT Sequential single shot** Color 54501A 100 MHz 1 MHz 10 MSa/s 4(2+2) Yes No No 54600B 100 MHz 2 MHz 20 MSa/s 2 No No No 54602B 150MHz 2 MHz 20 MSa/s 4(2+2) No No No 54503A 500 MHz 2 MHz 20 MSa/s 4 Yes No No 54610B 500 Mhz 2 MHz 20 MSa/s 2 No opt No 54502A* 400 MHz 100MHz 400 MSa/s 2 Yes No No 54504A 400 MHz 50 MHz 200MSa/s 2 Yes No No 54615B 500 MHz 250 MHz 1 GSa/s 2 no opt no 54510A 300 MHz 250 MHz 1GSa/s 2 Yes no No 54505B 300 MHz 125 MHz 500 MSa/s 2 Yes Yes Yes 54510B 300 MHz 250 MHz 1 GSa/s 2 Yes Yes Yes 54506B 300 MHz 125MHz 500 MSa/s 4 Yes Yes Yes 54512B 300 MHz 250 MHz 1GSa/s 4 Yes Yes Yes 54520A 500 MHz 250 MHz 1 GSa/s 1 on Yes Yes Yes 54520A “ 125 MHz 500 MSa/s 2 on Yes Yes Yes 54610B 500 MHz 54615B 500 MHz 250 MHz 2 GSa/s 2 on no opt No 54540A 500 MHz 500 MHz 2GSa/s 1 on Yes Yes Yes 54540A “ 250 MHz 1 GsSa/s 2 on Yes Yes Yes 54522C 500MHz 500 MHz 2GSa/s 2 on Yes Yes Yes Yes 54522A 500 MHz 500 MHz 2 GSa/s 2 on Yes Yes Yes 54542A 500 MHz 500 MHz 2 GSa/s 4 on Yes Yes Yes 54542C 500 Mhz 500 MHz 2 GSa./s 4 Yes Yes yes Yes *This is a 6 bit A/D converter. All the others are 8 bits. **Special feature called sequential capture. Also deep memory and memory bar display I was product support engineer on this product before I retired. Any 545XX I sell will be fully 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.
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