Products > Test Equipment
Agilent 54835A scope (4 channel 1GHz / 4Gs/s) repair & uphack
Converter:
--- Quote from: johnwb80 on March 07, 2019, 11:18:39 pm ---To goto 54846A (2.25GHz / 8Gs/s) mode. I didn't see that setup for the resistors anywhere.
--- End quote ---
I recommend you look at page 7 of this thread.
The trigger does not work stably at a frequency of more than 1.2 GHz, even if you expand the bandwidth of its inputs to 2.2 GHz.
It makes much more sense to try to upgrade the drivers to allow the installation of Win2K or WinXP here.
johnwb80:
sounds good thanks. I have the 54845A. I've put more memory in it and was looking for other mods. Probably will do the cpu swap I noticed on the 1st page, max the memory out, find quiet fans, Find a ide ssd hd for it probably at some point. It has the contractor for the attenuator have exceeded their expected life time notice but all 4 channels seem good so far. has anyone on here swapped out the contactors on the attenuator boards for this scope?
Converter:
I have only these photos. Unfortunately, there is no marking.
I see 3 different relays there.
analogRF:
--- Quote from: Converter on March 08, 2019, 03:20:04 am ---I have only these photos. Unfortunately, there is no marking.
I see 3 different relays there.
--- End quote ---
so the attenuator contact counter keeps the record for which of these relays?
K2 to K4 or the white plastic relay?
johnwb80:
I found it on one of the schematics. They're something like $60-80/ea and there's one for each ch that needs to be replaced. (from what I've read)
Looks like the contactor is the one for selecting input resistance (50 Ω or 1 MΩ) the other 2 are selectable attenuators. I'll probably swap out all 3 components with contacts on all 4 channels. I think k2 and k6 are the ones it's counting. They look similar to the Series A150 ultraminiature Attenuator Relays. Has anyone seen a part number on any of the 6 metal can relays?
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