EEVblog #452 - Stanford Research SR430 Teardown - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: April 09, 2013, 10:59:18 pm
content: Inside the Stanford Research SR430 Multi Channel Scaler Photon CounterUnboxing video here:Datasheets:http://www.physics.rutgers.edu/ugrad/389/muon/SR430m.pdfhttp://www.elektronik.ropla.eu/pdf/stock/hit/hd63484.pdfhttp://cds.linear.com/docs/en/datasheet/100737fbs.pdfhttp://www.analog.com/static/imported-files/data_sheets/AD96685_96687.pdfhttp://www.onsemi.com/pub_link/Collateral/MC10H107-D.PDFhttp://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXqzrvy.pdfhttp://www.physics.brocku.ca/~edik/gpib/TMS9914.pdfhttp://www.freescale.com/files/microcontrollers/doc/data_sheet/MC146818.pdfhttp://www.analog.com/static/imported-files/data_sheets/AD586.pdfhttp://en.wikipedia.org/wiki/Emitter-coupled_logic

author: poorchava
author_rank: Super Contributor
timestamp: April 09, 2013, 11:13:57 pm
content: I saw a TEAPO capacitor. One of the most recognized "bad caps" brand

author: free_electron
author_rank: Super Contributor
timestamp: April 10, 2013, 01:07:37 am
content: Reamwood avenue They're still there.. just a few traffic lights away from where i am.

author: Cognito
author_rank: Newbie
timestamp: April 10, 2013, 05:37:40 pm
content: I noticed one thing on the PCB for the CRT. It seems that it uses four brands of electrolytic capacitors, based purely on the color. I don't know if that is usual or not, but why did they decide to do it anyway?Great teardown Dave! I always learn alot

author: bitwelder
author_rank: Super Contributor
timestamp: April 11, 2013, 04:25:13 pm
content: Dave, did you clean/vacuum the boards before shooting the video?They were spectacularly clean for having 20 years of service behind.

author: Scott
author_rank: Newbie
timestamp: April 11, 2013, 09:40:38 pm
content: Digikey carries the BPV10 photodiode and it has a 2.5 nS rise time and only costs $0.86.Thorlabs charges $150US for a DET10A which is a 1 ns rise time Si diode in a nice box with a bias battery. The FDS02 diode from Thorlabs is $74, but has a 47 pS rise time. It's in a nice FC/PC mount so you can screw it onto the end of a fiber optic cable.They charge $42 for a bare 1 nS rise Si diode, so that BPV10 is a great value.Electro-Optics is fun!-Scott

author: CarlG
author_rank: Regular Contributor
timestamp: April 12, 2013, 09:17:15 pm
content: Interesting videoof a long livedinstrument! Surprisingly (at least to me) it's still running at SRS, would you believe it?!!Suggested use from the datasheet:The SR430 is useful in a variety of applications where itis necessary to count events as a function of time: LIDAR,time of flight mass spectroscopy, and fluorescence decaymeasurements are just a few examples.Obvious, isn't itThe -2V is the ECL termination voltage, not mentioned in the video I think.Interestingly, it's 10H ECL series, not 100H, that is temperature compensated. Maybe a price issue, or that 100K was rather new at that time (correct me if I'm wrong). Or maybe 100H wasn't even invented then; I lost track somewhere in the beginning of the 90's. A lot of new ECL logic families seem to have emerged since thenNote also that ECL basically is "constant current" i.e. a device draws the same current in either state as well as during switching. Of course, the decaps are still neededI think that the refdes starting number is defined by the schematic sheet number, e.g. 1000-series on sheet 10. I prefer to number passives along that scheme in multisheet schematics.EDIT: for the interested:Onsemi 10H/10K app note

author: Unknown
author_rank: Unknown
timestamp: June 03, 2013, 08:02:11 am
content: Hi,can someone explain more about the Oscillator Dave is Explaining from Minute 33:25~34:41It has a 25MHz PLETRONICS P1100HC, is rare to see an XO with so many .000000www.pletronics.com/files/index.php/p1100-hc.pdf?TCXO with 1ppm has only .0000anyway...near has a 74HC191 counter...?http://www.datasheetcatalog.com/datasheets_pdf/C/D/7/4/CD74HC191.shtmlbottom has a schmitt trigger working as a Oscillator, MC10H116P.from the resistor ^ the cap to ground looks like a Osc.http://en.wikipedia.org/wiki/Schmitt_trigger#Use_as_an_oscillatorL301 looks like a variable coil.how oscillates at 200MHz_?has 0.5~1.6ns Rise & Fall, pretty decent, but enough for 200MHz_? 300Mhz oscilloscope has 1ns Rise & Fall. could be.goes to the SP4633 /64 prescaler high speed 1Ghz divider... _? that means the Schmitt LC-Osc is generating more than 200MHz_?MC10H125 quad translator for interfacing data and control signals between the MECL section and saturated logic section ofdigital systems.? has a Rise&Fall 0.3~1.2ns. im lost here, could it be just to change the voltages to something the next understands_?the MC10Hc125P goes to the MM74HC4046 PLL... the VCO has 12MHz ?the LF411cn jfet op-amp with a bandwith of 4Mhz ?exept the op-amp most are negative voltages.the op-amp is just a buffer,?LC-Osc.http://en.wikipedia.org/wiki/LC_oscillatorf= 200MHzL=?C=?Why a XO if has an LC_?Logic would be the Schmitt for cleaning up the clock, and dividing for a lower frequency... but the L301 does not fit in the equation.

author: AngeloGomes
author_rank: Newbie
timestamp: January 06, 2021, 07:10:19 pm
content: Hi Guys, I have a SR850 and the circuitry for the CRT is the same.My Sr850 CRT is passing away and I am wondering how to replace it by a LCD display.Can someone give some advice about how to do it?

author: free_electron
author_rank: Super Contributor
timestamp: January 07, 2021, 02:11:04 am
content: these things are simple MDA monitors.