Agilent DSO1014A scope - increasing bandwidth from 100MHz to 200MHz - Page 1
Forum section: electronics / general

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: April 16, 2011, 03:33:42 am
content: Hi,I have Agilent DSO1014A 4 channel 100MHz scope. Here is how I have increased the bandwidth from 100MHz to 200MHz. The scope uses BW crippling method similar toRigol DS1052.I have pulled up the cathode side of the diode to a level that stops the current flowing through it. The 20MHz BW limit still works fine.The wire link on the IC looks dodgy but it is due to the camera looking at it slightly at angle. It's sitting right on top of the pin.Pulse rise time improved but it's a bit misleading - look how the pulse shape and amplitude have improved. Slew rate increased dramatically.CheersLeobefore: 100MHz BWafter: 200MHz BW

author: saturation
author_rank: Super Contributor
timestamp: April 16, 2011, 12:57:55 pm
content: Nice work! Is the hack finally just the jumper shown by the blue wire? Is there Rigol engineering in this model? It looks like Rigol's bigger brother.

author: flolic
author_rank: Frequent Contributor
timestamp: April 16, 2011, 01:58:20 pm
content: Quote from: saturation on April 16, 2011, 12:57:55 pmBy the look at that erased IC labels, I think yes

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: April 16, 2011, 07:16:35 pm
content: Yes, it is a rebadged Rigol.The hack adds a 3kOhm pull-up resistor marked by the arrow. I have update the picture.There are lots of +5V points closer to the point of interest but it looks like analogue and digital +5V circuits are separated so I have used digital +5V to be consistent with the rest of the control schematic.CheersLeo

author: drieg
author_rank: Regular Contributor
timestamp: April 16, 2011, 07:38:15 pm
content: Agilent DSO1004A = Rigol DS1064BAgilent DSO1014A = Rigol DS1104BAgilent DSO1024A = Rigol DS1204B...and both can be "improved" in a pure software way

author: saturation
author_rank: Super Contributor
timestamp: April 16, 2011, 08:19:24 pm
content: Awesome! Sorry for being lazy in checking it out, yet another scope brought up to new highs by clever EEs!

author: eurisko
author_rank: Newbie
timestamp: January 12, 2012, 12:15:32 pm
content: I am sorry to bump such an old topic.But i am little confused with the Rigol 1000B series.Right now in Europe they are oferring the Rigol DS1074B(70 Mhz) is it the same scope than the Rigol DS1064B(60 Mhz) US?Is any of them upgradable to 100 MHZ?Does anyone here on the forum owns one of this models?Right now at 799€ (DS1074B) with taxes i think it's a great value for a 4 channel scope. what do you guys think?

author: rf-loop
author_rank: Super Contributor
timestamp: January 12, 2012, 02:46:28 pm
content: Memory16 kpts (2 channels)8 kpts (4 channels)This is really bad. Really bad today.also 320x240 pixel monitor.is it really today? Yes it can use but after one time looking 7 or 8" 800x480 or 800x600... there is no road to back.

author: Unknown
author_rank: Unknown
timestamp: January 12, 2012, 03:49:06 pm
content: Quote from: rf-loop on January 12, 2012, 02:46:28 pmI agree that memory depth is quite limited compared to the current two channel scopes. Since you clearly believe that the only low-end scopes worth buying these days are made by Owon, which four channel Owon scope would you recommend instead? What other affordable four channel scopes with 1M+ memory and better than QVGA resolution are currently available?

author: rf-loop
author_rank: Super Contributor
timestamp: January 12, 2012, 04:40:34 pm
content: Quote from: alm on January 12, 2012, 03:49:06 pmExactly no. I only tell that this memory is tiny and display is littlebit small size but more bad it have also very low resolution.In this price if really need 4 channel, maybe can live with this display and memory. This price is nice.But it need realize that sampling speed go slow very fast with this kind of memory with lower horizontal speeds so that there do not then come disappoint in real life. (example with aliasing)If want more there need jump markable higher price.If have this posibility in budget, then there is selectable many very good candidates.One example is this: HMO724(as I say, one example. There are many and this example may be not best. Also what is ok depends lot of what is really need)