Mismatch between DPO70KSX "all_channel_names_list" and scope front panel

[andrewhof]

Good Afternoon,

I'm working on control scripts for a DPO70KSX using tm_devices, and when I look at 'DPO70KSX.all_channel_names_list', it reports ('CH1','CH2').

On my device, am right now looking at a signal that's being brought in on channel 3.

Can you point me in a direction to ensure channel 3 is addressable via tm_devices?

[nfelt14]

@andrewhof, can you provide the full model number of the device? That will help us figure out why the code seems to be thinking that it only has two channels.

Ideally, could you provide the full output of the *IDN? query?

[andrewhof]

@nfelt14 - thank you for responding!

The identity query response is "TEKTRONIX,DPO75902SX,B322198,CF:91.1CT FV:10.14.1 Build 15".

The python trace is below:

from tm_devices import DeviceManager
from tm_devices.drivers import DPO70KSX

dm = DeviceManager(verbose=True)
2025-04-03 09:43:05.755799 - Opening DeviceManager
scope : DPO70KSX = dm.add_scope(ip_address)
2025-04-03 09:43:29.330080 - Creating Connection to SCOPE 1
2025-04-03 09:43:29.471611 - (SCOPE) Query >> '*IDN?'
2025-04-03 09:43:29.479819 - Response from '*IDN?' >> 'TEKTRONIX,DPO75902SX,B322198,CF:91.1CT FV:10.14.1 Build 15'
scope.all_channel_names_list
('CH1', 'CH2')
scope.commands.ch[3].scale.query()
2025-04-03 09:44:44.185501 - UNCAUGHT EXCEPTION!!!
Traceback (most recent call last):
File "", line 1, in
File "C:\Users\Public\Documents\Programs\post_proc\device_automation\py_test.venv\lib\site-packages\tm_devices\commands\helpers\generic_commands.py", line 59, in missing
dict.setitem(self, key, self.default_factory(key)) # type: ignore[arg-type]
File "C:\Users\Public\Documents\Programs\post_proc\device_automation\py_test.venv\lib\site-packages\tm_devices\commands\dpo70ksx_commands.py", line 926, in
lambda x: Channel(device, f"CH{x}")
File "C:\Users\Public\Documents\Programs\post_proc\device_automation\py_test.venv\lib\site-packages\tm_devices\commands\gen_fk3z56_dpodsamso\ch.py", line 3036, in init
super().init(device, cmd_syntax)
File "C:\Users\Public\Documents\Programs\post_proc\device_automation\py_test.venv\lib\site-packages\tm_devices\commands\helpers\scpi_commands.py", line 273, in init
raise ValueError(msg)
ValueError: channel=3 is not a valid channel, valid channels: {1, 2}

See the logfile at 'C:\Users\Public\Documents\Programs\post_proc\device_automation\py_test\logs\tm_devices_04-03-2025_09-43-05.log' for the complete traceback.

[nfelt14]

And how many total channels does it actually have physically?

[andrewhof]

Three channels. 1 and 3 are standard probe channels, channel 2 is an ATI channel.

For our purposes, I'm aiming to trigger off of channel 1 and collect simultaneous views from channels 1 and 3. Channel 2's large sampling rate minimum isn't really ideal.

[nfelt14]

Ok, I will work with the team here and see how quickly we can get this issue resolved. I will convert this discussion into an Issue, since this is definitely a bug.

[andrewhof]

Thank you for support! Please let me know if you need any additional details to help debug.

[nfelt14]

Closing this in favor of the issue