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My 8510C, with no listed options, has the connector too. It is isolated between a pair of fiberglass washers, and is in the cluster of connectors on the back of the IF/Detector unit. I guess what I am

I've read that HP sized its fans to cool the instrument even when operating at maximum outside air temperature. If that is true, one might get away with less airflow if ambient temps stay closer to

Hello to the group. The old noisy bad bearing fan issue. I agree very hard to find replacements these days. Hard enough that I have started to open the fans up and repair them. I am seriously a

And they seem to be getting worse all the time. What about those new lithium 1.5 volt AA cells? Very long shelf life and I have yet to see one leak. Seems like an ideal choice for memory backup. Peter

Hi Kevin, at my 8510C there's also such an output. Mine looks quite original to me, and my unit was Agilent-cal-sealed, when I got it. Maybe somebody did brake the original BNC (it is fully isolated

I couldn't agree more!?? I've had *terrible* experiences with alkaline cells leaking. Daun

I suggest in the strongest terms, do NOT use alkaline cells in any memory backup scheme. They will leak out their electrolyte long before they run out the necessary power to run the backup scheme. I

Hi 8510 Experts I am piecing together an 8510C System ... the 85102A IF/DETECTOR has a BNC cable hanging out of an added rear panel hole with a label that says "L.O. Phaselock Out"? ... Does anyone

Usually there are three parts in a NVRAM, 1.SRAM 2.DS1210(or DS121x?) 3. 3V battery This means we can make NVRAM by ourself, HM6116+DS1210+two 1.5V AAA batteries=DS1220Y(2Kx8 NVRAM) one 256K

I just ran into a pair of standard NEC D43256 SRAMs in a socket which contains a small board and two small cells in a 1991 vintage Tek 11801 I am restoring to operation from an E5622, dead NVRAM

Would this be a situation where the best option would be to use some CPU cooler fans to direct local airflow to the hot components, allowing quieter fans to do the job in the back frame?

Mouser has several 80x80mm fans of varying depths at 31 to 47 CFM or did I miss read something. Regards, Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701

I have looked high and low for a 80x80 fan that has equal airflow and lower noise specs that the fan already installed in my HP5335A without success. Given the comments by Joe / KN5U that many of the

I hope no one objects to the cross posting, but I have instruments from all three OEMs. I'm getting ready to try to bring up my Tek 11801 when the replacement NVRAM shows up. In the process I'd like

Worked fine. Did not show inline, but as attachment.

Is it not possible to insert even small graphs into these messages? Let's try attaching...

Linear fit yields 22.52 GHz/mA. Note that with this sensitivity, which is well within the 23 +/- 1 mA per GHz spec, that at the low end the output is BELOW the 3.8 GHz cavity oscillator.? This plot

I was referring to its origins, and the platform on which it sees by far the most application. It was developed by Microsoft, for use within Windows, in the mid-1980s. It has long been supported on

The Zynq and Cyclone effort is aimed at hijacking COTS DSOs. I'm skeptical that one can build HW to the same price point. The motivation is I'm fed up with crappy FW. Even at $20K the FW is crap on

There's always the old "external battery trick" using isolation diodes in the +5 supply line to the NVRAM and hiding a larger battery somewhere in the unit.? This is similar to the non-battery backed