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Forgot to add the Block Diagram.

I have been troubleshooting my Network Analyzer using the E8356A, E8357A , E8358A Service Guide June 2004. This 8357 has an upgraded 700 MHz CPU. After reading and Option 015. My problem is Phase Lock

To anyone with HP 8902A expertise, My HP 8902A is in need of repair and some expert advice would be most helpful. Before going into details, I would like to hear from someone who is willing to assist.

I had given him this info offline. Nice to see you here Philip. -Dave (group owner) -- Dave McGuire, AK4HZ New Kensington, PA

I'm not a group manager, but since you have posted a message, I am pretty sure you have now joined the group. Welcome. You may want to select subscriptions on the left side of the web page, an adjust

I think it's fixed and running beautifully. The other A19 board was functional but significantly different on top and none of the labeling on the plastic cover matched the board, so I decided I should

I tried to do the adjustment procedure for A20, but could not get the YTO frequency above about 2.1 GHz, and likewise with any settings of the SA. Fortunately I have on hand a nearly full parts

Thanks Don. I noticed that when I turn on the device the red LED on the A6A7 (YTX current driver) board lights up for a few seconds, after which it turns off completely and the green LED seems to

The original YTO is indeed shot. I swapped in the one from the other A13, and it now runs and the YTO locks, but on a way wrong frequency. I'm assuming it has slipped a cog in the synthesis, that

Mike, On the BWD instrument these connectors are recessed deep in an insulator where the rotating part of the mating BNC connector is nestled down inside the same insulator. This prevents any ability

"Razvan Popescu via groups.io" <yo8ryr@...> writes:

Maybe for a quick connect/disconnect? - Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 908-902-3831

I swapped out the entire A13 (I think that's the right number) YTO/PLL assembly with one from an old 8566A carcass that I was using for another project. The YTO output was good and strong, but way off

I spent some time looking at my early 478A sensor again this evening and removed the ferrite (that I had added) and also bypassed the 2.7R damper resistor R1 fitted by HP. I then looked at the return

I have never encountered a bad YTO in a 8566, but this might be one. I just got this unit and had some time to check it out, assuming typical small problems. I'll have to bring a scope out to my truck

Beyond conjecture..... BNCs used in the BWD 880 PowerScope. Greg

Hi, Yes, that is correct. The start address formula x*8+9 applies and you can use any address as long as you are following that formula. Practically you can start with your table at address 9. I

Correction: when running service code 56 it is "OPTION COR FAIL".

Hello All, Caesar graciously provided me with the option codes to install option 006 on my 8753C several months back. I have finally located an 85047A for a reasonable price, and I am trying to

Already tons of various and diverse messages that are ultimately just conjectures... Paul, please post a photo of the connector you're talking about. Indeed, we often say that a small drawing is worth