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I've got an 11866A APC-7 calibration kit for a VNA. It's only rated to 2 GHz, but beyond that bit of information, I don't know anything about it. Does anyone have any data on this particular

I guess I am confused. It would appear that the signal has to get through the 60 dB attenuator before it gets to the 80 dB attenuator. Does that mean that when the 0 dB setting is chosen, a 'pad'

Jose, One other thing. There has been a lot of discussion on the list about the 8657B which is very similar to the 8657A at least up through the HET switch. You might want to have a look in the

Joe, The SN of my 3457A is 2703A. It is possible that the main controller, since it appears to be a mix of old resistor values and battery but new battery location, may have been replaced as an

Hello! Well, I have found an important thing I had missed... the generator HAS output at some amplitude settings. I have then done the test on Service Sheet 8, page 8 of the Service Manual, to

Hi all. I have a working HP 8555A Spectrum Analyzer RF section "plug-in" module which I don't have any use. If it would fit your needs, please contact me off-list. Picture of the actual

Steve, That was me. Thanks. BTW, what is the SN of your 3457A? 2749A? I am suspicious that the ERC code reflects the prefix of the serial number. On my board, 2703 appears and my serial number

Forgot to add to my last post - I thought someone asked about Option 700. Option 700 adds CIIL language support. Steve

Joe, Jeff, and all, I took a few minutes to pull the covers off my unit. My main controller is 03457-66511, Rev A. there is also a sticker that says 2749 just aft of the power switch. I believe

Glenn, Thanks for the info but I looked at the website and could find no mention of the LX series. Where did you find it? Joe

Hmm, I also just noticed I was looking at one of the newer revision circuits. The designs look the same however. I also see where NVVCC goes. One could almost supplement this with a thin film solar

Jose, I am not familiar with the specific attenuators you show but I suspect that they are hermetically sealed units, similar to the HET switch. The HET switch appears to be the 5061-4820. The

The large nut tightens down on a collet that clamps the coax. If it is over tightened, it will crush the outer shield and deform it. Maybe even short to the inner conductor? Are any connections loose?

At 04:07 PM 1/1/2013, you wrote Snip Snip some more From the SAFT website: Lithium-manganese dioxide (Li-MnO2) : LX series This is NLA from SAFT, but, you now know the

Hmm, I think your right. The watchdog circuit appears to compare the battery voltage with the power supply voltage to see if the power on sequence has obtained sufficient voltage before applying power

Hi Tom, Thanks for the hint! So, if that is the case, what would you do to fix it?. I mean, is it a good idea to disconnect them to check?. I have no clue of how the mating is made... is there any

Christian, I just checked the firmware on a late version (prefix 3811U) 8970B, standard version (1.6 GHz) and it's Rev 02844. It's possible that this was the last revision of the firmware. Another

Oh, one other thing. I have seen this problem caused by a bad coax connection to one of the modules. They are compression fittings to the outer conductor and if over tightened, damage will

That is the electronic version, no clicks.

Hello Joe, I have uploaded one to: http://jvgavila.com/tmp/hp8657a_att.jpg Thanks! JOSE