Siglent 1104x-e or 2202x-e?

[Andreax1985]

Another point in favor of 2202x-e seems to be bandwidth flatness, which is as follows:

DC - 60% (BW): ± 1 dB
60% - 100% (BW): + 1 dB/-3 dB

whereas for 1104x-e bw flatness is

DC- 10% (BW): ± 1 dB
10%- 50% (BW): ± 2 dB
50%- 100% (BW): + 2 dB/-3 dB

It seems that, for the 1104x-e, only 10% of  the bandwidth is attenuated less than 1db. Am I correct? Is this important?

[tautech]

Also be aware that Tautech is a Siglent agent (it says so under his name).

And you sound like that's a bad thing ? 

You're being a bit touchy - I just wanted to make Andreaux aware of your allegiance

Really ? I'm sure he's not blind or dumb.

[Gandalf_Sr]

I'm sorry, I'm not allowed to argue with you until you pay.

[Andreax1985]

Ok guys...I perfectly know that tautech is Siglent reseller. I think I knew it from the first days of me lurking on this website:D however I value his opinion as well as other member's. Now please, let's not derail the thread further

[tautech]

Another point in favor of 2202x-e seems to be bandwidth flatness, which is as follows:

DC - 60% (BW): ± 1 dB
60% - 100% (BW): + 1 dB/-3 dB

whereas for 1104x-e bw flatness is

DC- 10% (BW): ± 1 dB
10%- 50% (BW): ± 2 dB
50%- 100% (BW): + 2 dB/-3 dB

It seems that, for the 1104x-e, only 10% of  the bandwidth is attenuated less than 1db. Am I correct? Is this important?

Little.......if you also consider the industry standard amplitude accuracy spec of +3%.

[nctnico]

I wouldn't call 3% industry standard. On the low end oscilloscopes perhaps but on the A brands you'll often find numbers between 1% and 2%. BTW 3% is in the 0.25dB ballpark.

[Performa01]

It seems that, for the 1104x-e, only 10% of  the bandwidth is attenuated less than 1db. Am I correct? Is this important?

Of course bandwidth flatness isn't exactly the same for each individual vertical gain setting - but other than some cheap designs, it's still fairly consistent for the SDS1000X-E series:

1dB bandwidth at least 74MHz for the 100MHz version.
1dB bandwidth at least 192MHz for the 200MHz version.

See attached tables for the exact 1, 3 and 6dB measurements.

[Fungus]

c) Possibility to link it to a signal generator (Siglent brand only, of course) and do frequency sweeps/Bode plots

You really need to get up with the play:

Excuse me for not following every last Siglent thread on here.

c) Possibility to link it to a signal generator and do frequency sweeps/Bode plots

[Andreax1985]

It seems that, for the 1104x-e, only 10% of  the bandwidth is attenuated less than 1db. Am I correct? Is this important?

Of course bandwidth flatness isn't exactly the same for each individual vertical gain setting - but other than some cheap designs, it's still fairly consistent for the SDS1000X-E series:

1dB bandwidth at least 74MHz for the 100MHz version.
1dB bandwidth at least 192MHz for the 200MHz version.

See attached tables for the exact 1, 3 and 6dB measurements.

Hi, I've read with so much interest your review of the 1000xe series! It seems to me that bandwidth in the 200Mhz models is flatter. What do you think of the newest 2000x-e series? Would you suggest me the 2ch, 200Mhz, 2Gsa/s version (2202) over the older 4ch, 100Mhz, 1Gsa/s model (1104)?

[Fungus]

how about the 50ohm input in the 2202x-e? do you see it as a big plus?

In an office where things like BNC 'T' adapters are often "borrowed" by other people? Yes. 

In a home envirmonent? Not so much.

[Performa01]

It seems to me that bandwidth in the 200Mhz models is flatter.

Certainly not. The frontend is identical, there is just one dedicated lowpass filter to limit the bandwidth for the 100MHz model. This is why you see a fairly consistent 3dB bandwidth of 110MHz for the SDS1104X-E, whereas the 200MHz model enjoys the full input bandwidth which is not quite as well controlled but has a decent safety margin instead. That means barely more than 1dB attenuation for the specified bandwidth of 200MHz.

What do you think of the newest 2000x-e series? Would you suggest me the 2ch, 200Mhz, 2Gsa/s version (2202) over the older 4ch, 100Mhz, 1Gsa/s model (1104)?

The "older" model is the identical platform, so the only difference is the higher bandwidth frontend with internal 50 ohms termination and faster ADC with more memory for the SDS2000X-E.

I really cannot suggest anything because only you can answer the question what is more important to you: higher bandwidth or 4 channels?

- An RF engineer will certainly prefer higher bandwidth over four channels.
- "Generation Arduino" on the other hand will get away just fine with 200 or even 100MHz, but will consider four channels handy.
- Audio engineers might not care for any of these and look for a dual channel low bandwidth high resolution DSO instead.

[Andreax1985]

It seems to me that bandwidth in the 200Mhz models is flatter.

Certainly not. The frontend is identical, there is just one dedicated lowpass filter to limit the bandwidth for the 100MHz model. This is why you see a fairly consistent 3dB bandwidth of 110MHz for the SDS1104X-E, whereas the 200MHz model enjoys the full input bandwidth which is not quite as well controlled but has a decent safety margin instead. That means barely more than 1dB attenuation for the specified bandwidth of 200MHz.

What do you think of the newest 2000x-e series? Would you suggest me the 2ch, 200Mhz, 2Gsa/s version (2202) over the older 4ch, 100Mhz, 1Gsa/s model (1104)?

The "older" model is the identical platform, so the only difference is the higher bandwidth frontend with internal 50 ohms termination and faster ADC with more memory for the SDS2000X-E.

I really cannot suggest anything because only you can answer the question what is more important to you: higher bandwidth or 4 channels?

- An RF engineer will certainly prefer higher bandwidth over four channels.
- "Generation Arduino" on the other hand will get away just fine with 200 or even 100MHz, but will consider four channels handy.
- Audio engineers might not care for any of these and look for a dual channel low bandwidth high resolution DSO instead.

All in all I think I'll go for the 1104x-e. And if I'll need 200Mhz bw, I can always hack it to a 1204x-e. As far as I understand, a 2Gsa/s sampling rate is non essential for frequencies up to 200Mhz.