Gixy,
Thanks for the info. I'll have to try both channels ouputting the built-in square wave to see if I still have the phase difference.
Edit: I just compared both channels, outputting the built-in square wave at 25 MHz. There is a 5 degree phase difference.
I needed a square wave at 30 MHz, but the SDG2000X only goes up to 25 MHz. So, I created the attached waveform. Using DDS ARB mode, if I key in 3 MHz, I get 30 MHz. This works up to 120 MHz, but by the time you get to 50 MHz, it looks like a sine wave. Above 50 MHz, the amplitude isn't consistent.
Have you enabled channel coupling for phase and made sure the phase difference is set to zero?
AFAIK they can only do ~8-10ns raise time. So, indeed, it can't do square waves above 25MHz, unfortunately.
Concerning amplitude, I don't remember having any issues. Do you have good coax connections with proper termination?
try esc, then ":wq" (notice colon)
Again, this can help https://www.cs.colostate.edu/helpdocs/vi.html
Then don't hit esc, just type ":wq". If you show me which instructions you follow I can try to figure what's wrong. Should be something very trivial.
Guide for Dummies
1. Plug in ethernet cable and turn on unit
2. Press Utility -> Page 1/2 -> Interface -> LAN Setup -> DHCP ON
3. On you computer telnet (Windows use Putty, OS X and Linux can just use telnet on the CLI) to the IP Address that's displayed. (If you need to manually specify the port it's 23)
4. mount -o remount,rw ubi2_0 /usr/bin/siglent/firmdata0
5. cp /usr/bin/siglent/firmdata0/NSP_system_info.xml /usr/bin/siglent/firmdata0/NSP_system_info.xml.orig
6. vi /usr/bin/siglent/firmdata0/NSP_system_info.xml
7. Use the down arrow to navigate to the line which has '<license><bandwidth_update_license>xxxx</bandwidth_update_license></license>'
8. Press dd to delete the line. Press ESC. Type :wq then hit enter (write quit)
9. Turn unit off and on again
Guide for Dummies
1. Plug in ethernet cable and turn on unit
2. Press Utility -> Page 1/2 -> Interface -> LAN Setup -> DHCP ON
3. On you computer telnet (Windows use Putty, OS X and Linux can just use telnet on the CLI) to the IP Address that's displayed. (If you need to manually specify the port it's 23)
4. mount -o remount,rw ubi2_0 /usr/bin/siglent/firmdata0
5. cp /usr/bin/siglent/firmdata0/NSP_system_info.xml /usr/bin/siglent/firmdata0/NSP_system_info.xml.orig
6. vi /usr/bin/siglent/firmdata0/NSP_system_info.xml
7. Use the down arrow to navigate to the line which has '<license><bandwidth_update_license>xxxx</bandwidth_update_license></license>'
8. Press dd to delete the line. Press ESC. Type :wq then hit enter (write quit)
9. Turn unit off and on again
# telnet 192.168.1.26
Trying 192.168.1.26...
Connected to 192.168.1.26.
Escape character is '^]'.
===============================================
|SIGLENT SDG project
===============================================
(none) login:
telnet> open
(to) 192.168.1.26 5024
Trying 192.168.1.26...
Connected to 192.168.1.26.
Escape character is '^]'.
Welcome to the SCPI instrument 'Siglent SDG2042X'
>>
edit: I found a working downgrade, got full bandwidth after telneting in and removing the line, then did an upgrade to latest firmware revision - works well
Hum, with original 23R7 you can't login with Telnet. Use the janeviki version with which you can login with username admin and a password very simple to guess for members here...
Hum, with original 23R7 you can't login with Telnet. Use the janeviki version with which you can login with username admin and a password very simple to guess for members here...
Gixy - I tried to look around the site but can't find easily what you meant by "janeviki version" - could you please give a link/reference to that?
Thanks,