Products > Test Equipment
Agilent E7495 linux root account
PA0PBZ:
--- Quote from: technogeeky on March 04, 2017, 02:18:31 pm ---Yes indeed. I really hope to get this one day, so perhaps someone here has come across it. I guess I could ask Keysight for it, but I doubt that will get very far.
--- End quote ---
If I remember correctly the software it is supposed to work with specific TM equipment (think sig gen, rf meter and such), and as long as you don't have those it will be of no use at all
technogeeky:
--- Quote from: PA0PBZ on March 04, 2017, 02:54:34 pm ---
--- Quote from: technogeeky on March 04, 2017, 02:18:31 pm ---Yes indeed. I really hope to get this one day, so perhaps someone here has come across it. I guess I could ask Keysight for it, but I doubt that will get very far.
--- End quote ---
If I remember correctly the software it is supposed to work with specific TM equipment (think sig gen, rf meter and such), and as long as you don't have those it will be of no use at all
--- End quote ---
Oh. I thought this unit sort of contained most of the hardware it needed to test itself. I also figured they left space in the UI for those buttons, so maybe it was on the machine. Ah well. It's still an incredible buy at $300 shipped (and now) fixed.
technogeeky:
In searching around for possible calibration software information (both on the unit and in general), I have so far only found this document which describes TME or Test Management Environment.
This is the aforementioned piece of software which runs on a computer (apparently with some IO libraries and a GPIB card of some sort).
It seems you can download the latest version though it needs a license key. It seems there are very old calibration applications (C.xx.xx), old calibration applications (D.xx.xx) and newer ones (E.xx.xx).
The are two new facts that I think this document brings to light, however. One concerns Agilent internal numbering for these devices:
* The N1996A CSA is internally known as N7813A
* The E7495x BST is internally known as N7816A
However, the reason I know this is new information is the same reason I also know this is not useful information: a search for N7816A reveals nothing except the above PDF.
Secondly, it seems like a very small subset of devices are labeled (internal Agilent only) which presumably means only Agilent themselves can run that cal application. These include:
* Our E7495x units.
* An ACQ/SW unit 34970A.
* All of the Dragonfly-based Digital Receivers (E640xx, E745xx, E747xx).
I guessed that this is because all of these units incorporate 'Dragonfly' units (the E7495s appear to), but the 34970A seems to be an exception to this. I won't speculate further.
In any case, I wonder if we could appeal to Keysight to release the software and licenses for this, since it's long since unsupported; and they won't even do CALs for these devices anymore.
technogeeky:
If anyone cares to test, I had a theory that perhaps turning off some levels of logging/debugging might help. It turns out that there is no straightforward way to stop the debugging processes, but you can disable any logging.
Simply edit this file with the following changes:
/flash/linux/etc/rc.d/init.d/egGui
--- Code: ----DLogger.level=2
--- End code ---
to:
--- Code: ----DLogger.level=0
--- End code ---
Unfortunately I can't find a good thing to test this with. But the UI does seem a bit snappier. I wonder what other options are there for -Dxxx.
Also, I played around with the files in /flash/egServer/Dragonfly/Recievers, like E7495A and CPXSRC. You can indeed change things here and sometimes see the effects (e.g. you can change E7495A to have Freq Range be 3000e6, and it makes it possible to enter that value). However, some of these changes will have no effect for other reasons (here, I assume it's because there is actually a filter which sharply cuts off at ~ 2.7GHz).
However however, I could not find a way to try and make the signal generator make higher or lower frequency signals.
Did anyone actually try porting things from the N1996 over to ElGato? The only things I'd really be interested in are FM/AM demodulation and audio playing, and Harmonics viewing.
kirill_ka:
--- Quote from: technogeeky on March 06, 2017, 08:21:07 am ---Did anyone actually try porting things from the N1996 over to ElGato? The only things I'd really be interested in are FM/AM demodulation and audio playing, and Harmonics viewing.
--- End quote ---
N1996A spectrum analyser code doesn't work with E7495 for some reason. It attempts to work, but DSP code seems to hang somewhere. See my post above. If you can find different versions of N1996A firmware, we might have a better luck.
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