Hacking the Rigol DHO800/900 Scope

[kahe40]

he wants to generate functions or waveforms,
they call it FunctionGenerator, ArbWaveformGenerator or AWG.
see friend Mechatrommer here:

https://www.eevblog.com/forum/testgear/rigol-dho804-bode-plot/

[Fungus]

he wants to generate functions or waveforms,

The internal AWG board of the DHO900?

[sonic]

I just got Bluetooth working with the Edimax EW-7611ULB (not V2) Bluetooth/Wifi combo adapter

Now also works with the Edimax EW-7611ULB V2.

[DerekA]

What's lsmod?

It's a Linux command.

https://en.wikipedia.org/wiki/Lsmod

do

Code: [Select]

adb shell lsmod
also

Code: [Select]

adb shell lsusb
to see your usb devices

@Fungus Hi, me again.

So I connected to the scope via ethernet and ran the commands you suggested. This is what I got back (see pic 1). The first "lsusb" command is with the WiFi dongle plugged into the scope. The second run of the command "lsusb" is without the WiFi dongle. So the scope seems to be seeing the dongle in the port OK (Device ID: 0bda:8179). The second photo shows the output with a Hub, dongle and keyboard connected. The keyboard works fine so the USB on the scope is working. The Wifi dongle works fine on my PC so I know that's OK, and I'm pretty sure it's the right version (TP-Link WN725N Ver:3.0). But I still get the same "WIFi disabled" and I'm still unable to switch it on with the switch in Android settings. I've serched the forum to the best of my ability and can't find any similar issue from anyone else.

It appears that the Kenrnal Module rtl8xxxu you mention is missing. So I'm not sure what to do next. Can it be installed? Where do I find it if so and how do I do that.

Cheers...

P.S. Sorry for all the questions but I've only had the scope for 4 days and don't know anything at all about Android.

[Fungus]

So I connected to the scope via ethernet and ran the commands you suggested. This is what I got back (see pic 1). The first "lsusb" command is with the WiFi dongle plugged into the scope.

Did you plug it in before you powered on? I think it only checks for the WiFi dongle at startup.

note: You don't need a keyboard for this, you can open the settings with:

Code: [Select]

adb shell am start com.android.settings

[DerekA]

That was it  . I dont know why the hell I didn't think about that...

All connected and working properly now. Thank you so much for your help.

Appreciations.

D.

[FxDev]

I've just bought DHO804. It came with first version of firmware and it did not have CAN analyzer.
After firmware update, now DHO804 became to make CAN signal analyze.

I didn't hack the scope. Just firmware update. Am I missing something, because normally DHO 804 have not CAN analyze feature. 

[Fungus]

I didn't hack the scope. Just firmware update. Am I missing something, because normally DHO 804 have not CAN analyze feature. 

Normally it's a DHO904 feature. 

What does it show on your "Options" screen?

[RogerG]

Hi,

my DHO804 has the CAN option, too. But my copy has the CAN analyzing function since applying the hacks to enable BW7to10, AUTO and Memory expansion all found in the opts.txt by SCPI command. So it's still a DHO804, the DHO model was not changed.

However, LIN option doesn't appear.

[Fungus]

my DHO804 has the CAN option, too. But my copy has the CAN analyzing function since applying the hacks to enable BW7to10, AUTO and Memory expansion
However, LIN option doesn't appear.

Mine doesn't.

CAN and LIN are the item in the licensing, so something is weird. 

What does your "Options" screen show?

[RogerG]

Hope the pics speak for themself 

[scroeffie]

iam going to buy this scope and maybe hack it if i can do i buy the 200mhz probes or 100mhz ? Rigol DHO802

[shapirus]

iam going to buy this scope and maybe hack it if i can do i buy the 200mhz probes or 100mhz ? Rigol DHO802

just keep the ones that come with the scope, they're good enough.

p.s. get a DHO804 instead.

[scroeffie]

i need  1:100 probes for crt work etc wil buy the 804

[FxDev]

This is my option screen.
I don't know how but it's very good to have CAN analyze function 

[TomKatt]

This is my option screen.
I don't know how but it's very good to have CAN analyze function 

Is the CAN function = 'Auto Serial Bus' trigger and analysis?  If so, that is a trial license with a limited number of times you can use it before that function is automatically disabled.

[Fungus]

This is my option screen.
I don't know how but it's very good to have CAN analyze function 

Is the CAN function = 'Auto Serial Bus' trigger and analysis?

Yes. It's interesting that it's available though, I've never seen it on a DHO800 before.

Maybe Rigol is planning something.

If so, that is a trial license with a limited number of times you can use it before that function is automatically disabled.

Yep.

But RogerG has it forever...

[FxDev]

Hi,

my DHO804 has the CAN option, too. But my copy has the CAN analyzing function since applying the hacks to enable BW7to10, AUTO and Memory expansion all found in the opts.txt by SCPI command. So it's still a DHO804, the DHO model was not changed.

However, LIN option doesn't appear.

How did you do the hack?

 

[RogerG]

I did as described in this post:
https://www.eevblog.com/forum/testgear/hacking-the-rigol-dho800900-scope/msg5344076/#msg5344076

Second way - generation of additional options

Auto was the option for can trigger and analysis.

[scroeffie]

found this if some one wants to make one for them selfs

https://github.com/LorenceChen/DHO800_BatteryPack

[bobxyz]

Factory non-hacked CAN decode/triggering on the DHO800 series was added in ~January with the later firmware updates - it wasn't supported originally, but is supported now (firmware v1.02), and is included in the newer datasheet/user manual.  LIN bus is not [yet?] supported.

I'm not sure if the Auto Serial Bus "Limit" in the options refers to a limited number of uses before needing to buy a license or it means that the support is limited (no LIN bus)?

There are issues with a 10x probe and CAN protocol decode - https://www.eevblog.com/forum/testgear/rigol-dho814-capturing-can-frames/msg5406683/#msg5406683

[shapirus]

i need  1:100 probes for crt work etc wil buy the 804

you'll want to check the voltage vs frequency derating curve for the probes you're planning to get.

for basically any passive probes, their max allowed voltage goes down pretty quickly with frequency getting beyond 0.1-1 MHz or so, definitely no HV probing at 100+ MHz.

[TomKatt]

i need  1:100 probes for crt work etc wil buy the 804

you'll want to check the voltage vs frequency derating curve for the probes you're planning to get.

for basically any passive probes, their max allowed voltage goes down pretty quickly with frequency getting beyond 0.1-1 MHz or so, definitely no HV probing at 100+ MHz.

For any work on a crt I'd consider differential probes...  And if you're looking at the really high voltages definitely get a proper HV probe.

[Fungus]

I'm not sure if the Auto Serial Bus "Limit" in the options refers to a limited number of uses before needing to buy a license or it means that the support is limited (no LIN bus)?

It means it's time-limited. It will be disabled after you use the 'scope for a while (40 hours?)

There are issues with a 10x probe and CAN protocol decode

ALL of the serial decoders have a bug where the threshold level isn't multiplied by the probe setting (nb. The attenuation setting, not the physical switch on the probe).

If you don't set the probe to 1x in the vertical menu then you have to multiply your threshold voltage by 10 (the line will be off the top of the screen).

Me? I set it to 1x for serial decoding and the level marker on screen works perfectly.

[TomKatt]

I'm not sure if the Auto Serial Bus "Limit" in the options refers to a limited number of uses before needing to buy a license or it means that the support is limited (no LIN bus)?

It means it's time-limited. It will be disabled after you use the 'scope for a while (40 hours?)

From the User Guide -

The instrument is installed with the trial versions of the options before leaving
factory. The trial time starts from the time when you power on the instrument for
the first time, and the trial time is about 2,160 minutes.

2,160 / 60 = 36 hours running time

I don't have a Rigol scope, but I'd assume there are hacks available that make those options permanent anyway?