Rigol DHO814 HDMI output - Page 1
Forum section: electronics / testgear

author: Tubeoman
author_rank: Newbie
timestamp: March 06, 2024, 10:33:19 pm
content: I recently purchased a Rigol DHO814 oscilloscope and tried to connect my HP Z24i as an external monitor. The cable is a HDMI -> DVI for the input on the monitor (no HDMI input on this monitor).The Rigol scope will not switch on its HDMI output unless I unplug and replug the cable and then everything is fine, but this will eventually ware out the HDMI connector. It would be much better if there is some menu entry by which I can enable the HDMI output, but I cannot find this menu point - maybe you can.The DVI connector has a full house of pins and is of high quality.Do you have any suggestions - thanks.

author: danno_cj
author_rank: Contributor
timestamp: March 07, 2024, 10:49:09 am
content: I see two possible solutions: extension cable or HDMI splitter.

author: Tubeoman
author_rank: Newbie
timestamp: March 07, 2024, 11:49:32 am
content: Just to let you know, it seems that the HP Z24i monitor does not communicate properly with the Rigol DHO814 scope on when to switch on the monitor display.I connected an older Lenovo ThinkVison monitor using the exact same HDMI to DVI cable and this monitor automatically recognizes the signaling and starts as it is supposed to.I don't know whether it is the Rigol or the HP Z24i that has the problem, but it works now with the Lenovo monitor!

author: luma
author_rank: Regular Contributor
timestamp: March 07, 2024, 11:56:31 am
content: I wonder if a cheap EDID emulator might resolve the problem, eghttps://www.amazon.com/dp/B0BR7N9CBSNo idea if that specific one is any good, just a random result to demonstrate. It does somewhat align with your description of the problem, you might not be getting EDID from your monitor.

author: billydelectronics
author_rank: Newbie
timestamp: July 14, 2025, 12:00:40 am
content: Sorry for the thread revival, but it helped me get my new DHO804 working swimmingly with my new Dell 4k monitor. I have the Rigol HDMI going to HDMI input on my monitor and then I have a Logitech MX Master 3s dongle on the USB port of the Rigol. The mouse part worked immediately, but the video wasn't making it to the external monitor. I got it to work intermittently about 1/20 tries, but it wasn't consistent.Luma's and danno_cj's suggestions about HDMI splitters and EDID reminded me that I had an old HDMI switcher from 10+ years ago that I just couldn't bring myself to discard. It is an Orei UHDS-104 and it has built in EDID functionality. I connected Rigol HDMI to switch input and then HDMI out 1 to the input of the monitor. It worked immediately and it works consistently. I can turn off the Rigol, the monitor, change to DP to use my PC, change back and forth. It works, I tell you! Combine that with the Logitech mouse that can control the Rigol or my PC (and a third bluetooth device if I want to get crazy). They do sell EDID passthru adapters on the 'zon like luma found, but the reviews weren't entirely positive. I may get a couple just to see (I don't need a 4 port HDMI switch that requires power--but I'll keep it as a fallback. I also saw a splitter by Anker on the 'zon that looks promising from the reviews. It has 2 ports, but no external power requirement. At $16 it's worth a shot. Item model number: A83H1.Thanks for the help!