Took apart my Tektronix DPO4034 - Page 1
Forum section: electronics / general

author: allanw
author_rank: Frequent Contributor
timestamp: November 20, 2010, 02:18:50 am
content: a

author: GeoffS
author_rank: Unknown
timestamp: November 20, 2010, 05:07:58 am
content: And the important question - did it still works when you put it back together?

author: Unknown
author_rank: Unknown
timestamp: November 20, 2010, 02:21:49 pm
content: Thanks for the pics. Maybe the moisture sealant is to keep leakage low, so it lasts longer on the lithium cell?

author: saturation
author_rank: Super Contributor
timestamp: November 20, 2010, 02:51:33 pm
content: Awesome, and brave! of you. Thanks for sharing.

author: allanw
author_rank: Frequent Contributor
timestamp: November 20, 2010, 03:37:39 pm
content: b

author: Unknown
author_rank: Unknown
timestamp: November 20, 2010, 03:48:47 pm
content: Quote from: allanw on November 20, 2010, 03:37:39 pmIt sounds plausible that they're the ADC's, and in that case, it's quite likely that it's custom silicon. No manufacturer uses off-the-shelf ADC's, except in the very low end. This is part of what makes the faster scopes so expensive.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: November 20, 2010, 04:14:37 pm
content: Quote from: allanw on November 20, 2010, 03:37:39 pmI think these may be connectors for a high-speed logic analyser connection and/or MICTOR connectors - they appear to be grouped in differential pairs.As regards the moisture sealant, this will be to avoid leakage due to board contamination on the RTC crystal's high impedance connections.On the same subject, here are a couple of pics indide my Agilent MSO6034A :

author: saturation
author_rank: Super Contributor
timestamp: November 20, 2010, 06:28:38 pm
content: Wow. For comparison, compare those boards to the Rigol 1052E, the integration and parts density of your scopes are intense.From Dave's photos:

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 20, 2010, 07:01:00 pm
content: whats the zigzag traces on mike's scope/pic? there are 2 big on the middle right (1st pic), middle left on the 2nd pic? looks funny.ps: 3 last pics in the 1st post are broken. or isit just me?

author: jahonen
author_rank: Super Contributor
timestamp: November 20, 2010, 07:06:26 pm
content: Quote from: mikeselectricstuff on November 20, 2010, 04:14:37 pmGreat, now I don't have to open mine. I like those high-speed length matched differential pairsKind of amazing how both the Tek DPO4000 and Agilent MSO6000 have similar large lithium battery.shafri: The zigzag is for length matching, to equalize the propagation delays on the PCB. A common high-speed technique.Regards,Janne

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 20, 2010, 07:34:55 pm
content: hmm ok thanx. the heatsinks tell the story, not the usual rigol thing.

author: scopeman
author_rank: Frequent Contributor
timestamp: November 20, 2010, 10:34:31 pm
content: Quote from: alm on November 20, 2010, 02:21:49 pmThe moisture sealant area is to keep moisture and humidity from affecting the RTC and crystal for the time of day clock. Even a pF or so can change the frequency of the oscillator or cause it to stop.Scopeman

author: tinhead
author_rank: Super Contributor
timestamp: November 21, 2010, 08:53:26 am
content: Quote from: allanw on November 20, 2010, 03:37:39 pmmy theory : probably only "bank memory" chips, for 5GSs you will need second one "big" custom BGA soldered between these two Tek custom chip (without heatsink), so in principle two 2.5GSs ADCs,each with 10M sample memory but together still "only" 10M memory but 5GSs.