Tek 1100 Series 'Scopes - Page 1
Forum section: electronics / testgear

author: lkmurdoch
author_rank: Newbie
timestamp: July 11, 2014, 08:45:54 pm
content: Good day all,I am curious about this series of Tek scopes but could someone enlighten me as to the difference between the following?Tektronix 11301 vs 11301ATektronix 11302 vs. 11302AThere is not a whole lot of info on these that I can find on the web.Thanks in advance,Michael

author: tekfan
author_rank: Frequent Contributor
timestamp: July 11, 2014, 09:47:20 pm
content: The main difference between the 11301 and the 11302 is the micro-channel plate CRT on the 11302 which provides a 100x faster writing speed. This allows you to capture a single pulse at 500ps/div and still be visible in normal room light.The A and non A versions are basically the same with minor improvements such as the readout select button on the 11302A which is missing on the non A version.They are pure analog scopes and have no waveform storage facilities. They do however have quite a comprehensive array of measurement modes for waveforms. The connectors at the back are just for programming the scope to do certain commands.Here's a list of the basic differences:11301:- standard CRT without MCP accelerator and touch screen- 400MHz vertical amplifier bandwidth- slightly larger than normal CRT (1 major division is 1.22cm)- gated internal counter (external counter input goes to 500MHz)- internal measurements (rms, p-p, mean,...) also cursors11301A: (not sure but guessing here)- same specs as non A 11301 version- external counter input has increased bandwidth- added readout mode button11302:- CRT with MCP accelerator and touch screen- 500MHz vertical amp bandwidth- standard size CRT (1 major division is 1cm)-gated internal counter (500MHz bandwidth internal and external)- internal measurments (rms, p-p, mean,...) also cursors11302 A:- same as non A 11302 version- increased external counter input bandwidth to 750MHz- added readout mode buttonI have a Tek 11302A and I can say it's a joy to use. It is however not a scope for everyday use and troubleshooting.It's great for critical measurements or when you just need a lot of bandwidth and channels.The 11k series analog scopes share some custom Tek hybrid ICs with the Tek 2400 series, but a few are only found in the 11k series.For example the Z axis amplifier hybrid is different to the 2400 series and is known to fail. The horizontal deflection amplifier is the same as the 2400 series and is also known to be a weak point.Be sure to also take into account the different plugins available for the 11k series scopes.Here's a post I wrote some time ago describing the various plugins available:https://www.eevblog.com/forum/beginners/getting-a-free-tek-dsa602-what-exactly-is-it/msg294738/#msg294738With an easy modification it is also possible to use the Tek 7000 series plugins. Although without the enhanced accuracy feature and internal diagnostics.

author: echen1024
author_rank: Super Contributor
timestamp: July 12, 2014, 03:33:04 am
content: Note that a MCP only works by destroying itself/

author: edavid
author_rank: Super Contributor
timestamp: July 12, 2014, 04:27:34 am
content: Quote from: echen1024 on July 12, 2014, 03:33:04 amLike everything that emits light.(But seriously, 11302s have the most advanced version of Tek's MCP protection system. I've never heard of one with a burned tube.)

author: tekfan
author_rank: Frequent Contributor
timestamp: July 12, 2014, 11:44:15 am
content: The MCP is amazing. My 11302A has quite a bit of phosphor burn in but if the intensity is cranked to max the CRT will still happily illuminate an entire room. Not bad for a 30 year old scope. The hybrid ICs will probably die long before the CRT will.But seriously if you're after your first analog scope for everyday use I certainly wouldn't recommend it. However if you're after the bandwidth, fast rise time and measurement precision these scopes might be useful to you. If you can get one cheaply with the appropriate plugins and have enough space for it of course.

author: echen1024
author_rank: Super Contributor
timestamp: July 12, 2014, 03:32:40 pm
content: Quote from: tekfan on July 12, 2014, 11:44:15 amReally? I've been hesitant to purchase a 2467 for that reason.