Products > Test Equipment
Siglent SDG1032X Frequency Counter Precision
killingtime:
Hi,
I was looking at a Siglent SDG1032X fot HF use. It has AM &FM modulation types (no SSB sadly) and can be upgraded to 60MHz. It also has a 200MHz frequency counter and a 1mHz resolution.
Excited when I saw the resolution, then I saw the clock ppm on the spec sheet: +/- 25ppm
So that's plus or minus 250Hz at 10MHz /2.5KHz at 100MHz, using a display resolution of 0.001 Hz.
Am I missing something here?
Screenshot of the counter page attached.
Spec:
https://siglentna.com/wp-content/uploads/dlm_uploads/2022/06/SDG1000X_DataSheet_DS0201X_E01I.pdf
I think I saw a tear down of a 1032x and saw pcb space for a tcxo instead of the resonator, but I don't see this as a purchase option on Siglents website.
Anyone done the tcxo mod?
Regards.
colorado.rob:
The SDG1000X has a 10MHz reference input. That's what I use, along with a GPS-DO, on my SDG2000X when precise frequency measurements are required. Those two together make for a very accurate frequency counter.
killingtime:
Yes, 100 USD buys a GPS-DO, and no need to open the case of the DDS generator, but you need open sky for the antenna.
Ignoring the last 6 digits of readout just surprised me. I've heard of mfrs. giving you the extra 1 digit for marketing purposes, but 6 ....
A 0.1PPM TCXO would give 1Hz uncertainty at 10M and 10Hz at 100M. A lot cheaper as well, but with loss of warranty.
Surprised they didn't use a more stable source. They must have used 25 PPM for a reason. Even 0.5 PPM oscillators aren't that expensive now. Many UHF transceivers use 1 / 2 PPM to avoid interference.
Hexley:
You might find this apropos : https://www.eevblog.com/forum/testgear/siglent-sdg1000x-series-clock-adjust/msg4081711/#msg4081711
JehTeh:
I would agree with others who have mentioned using the external reference clock in + GPSDO. On my bench here I have the 2042X, which for reference is within about 0.3-0.5ppm of my GPSDO over a 30 minute window (A BG7 unit+distributor) which normally acts as the reference clock for it).
I actually use it more often than anything else for stuff like quickly tuning RTCs etc. and it works well. The 2042 obviously has a better internal reference than the 1000 series but I think they are fairly similar so with a good external reference I would hope it will work quite well.
Navigation
[0] Message Index
[#] Next page
Go to full version