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| How much should I pay for a Agilent 1683AD Logic Analyzer ? |
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| gslick:
The best deal is always when the logic analyzer comes with all of the necessary standard accessories. The second best deal if you are patient and can wait for them to show up on eBay is to buy a complete accessory set: 16550-68702, 16555-68702, 16715-68702. In the past those could sometimes be found for less than $100 on eBay. Maybe not anymore. One of those sealed as new sets will contain the following (the 16550 version contains 6 instead of 4): Probe Tip Assembly, Qty 4 01650-61608 Grabbers, Qty 4 packages (20 grabbers per package) 5090-4356, or 5090-4833 Extra Probe Leads, Qty 1 package 5959-9333 Extra Probe Grounds, Qty 4 packages 5959-9334 Probe Cable and Pod Labels, Qty 1 01650-94310, or 01650-94312 The new part number for the 01650-61608 is the E5383A / E5383B https://www.keysight.com/us/en/product/E5383B/single-ended-flying-leads-with-40-pin-cable-connector.html |
| electronic_guy:
Thank you all for your suggestions. I looked at the auction you have suggested when it was active and it seemed a bit risky to buy something that doesn’t show anything on the display. By the look of the seller’s other items for sell, it cannot be the case that he didn’t know anything to even turn ON and show the display. He has many other test equipment that were photographed with display ON. I’ve had my fare share of as-is and for parts drama. Not worth the risk I think. Otherwise it seems like a really good deal. I wonder what was wrong with it. I ended up buying a working agilent 1683AD for just 200 USD. Since my interest is mostly in RF, it’s better I don’t spend a lot on a logic analyzer. My sole intention is to learn how to use a professional logic analyzer and test some FPGA designs. Since FPGAs come handy in RF field also now that RF subsystems are integrated inside I think it’s time for me to get to know a logic analyzer. The self tests on the unit I bought are all passed. Still got to test it though. If you have any ideas on testing it to detect if it has any hardware or software fault, please let me know. Waiting for some grabbers to start testing it. ;D |
| gslick:
If it is fully functional, an Agilent 1683AD for $200 seems like a fairly reasonable price. That's not much above what an older 1673G with similar acquisition specs might sell at. I'm not sure why, but the 168xA / 168xAD series seem to have rather high asking prices on eBay compared to older 167xG series or newer 168xxA series self-contained portable logic analyzers. Sometimes run this search on eBay and the asking prices seem a bit crazy: "agilent (1680ad, 1681ad, 1682ad, 1683ad, 1690ad, 1691ad, 1692ad, 1693ad)" The AD models are more desirable than the A models due to the 4x sample memory depth. The 168xA / 168xAD series and the 169xA / 169xAD series use identical logic acquisition modules. The acquisition modules interface to the controlling PC through a 1394 port. In the case of the 169xA / 169xAD series the controlling PC is an external PC with a 1394 card. In the case of the 168xA / 168xAD series the controlling PC is integrated into the analyzer with a standard PIII motherboard and PCI 1394 card internally cabled to the acquisition module. One thing about these series is that for some reason the 1394 ports seems like they can die. Maybe the 1394 phy chip fails. I have seen several 169xA / 169xAD series listings on eBay where the photos show a 1394 cable being routed to one of the internal 1394 ports instead of the front panel 1394 port. If the 1394 port fails, then the logic analyzer application obviously can't connect to the logic analyzer at all. If the logic analyzer application connects to the analyzer and all of the self test pass, that is a pretty could sign that it is fully functional. The only other thing that can go wrong that might not be detected by the self tests is the failure of any channels in the front end logic level comparators, for example from exceeding the maximum voltage input levels, or static discharges. You need to feed some sort of input signal (for example a TTL level oscillator clock signal) into each input channel and check for activity instead of stuck low or high levels. |
| gslick:
If you see a photo that looks like this on eBay, it usually a good indication that the front panel 1394 port of the 169xA / 169xAD series logic analyzer has failed. The 1394 cable is supposed to plug into the 1394 port on the far right of the front panel instead of being routed into the chassis and plugged into one of the internal 1394 ports. If one of the 1394 ports fails, it might not be long before other ports might also fail. |
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