Reverse frequency sweeping on Rohde&Schwarz ZNB40 via QCoDeS
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 45/100
Research direction
Start with the ZNB driver entry point in qcodes.instrument_drivers.rohde_schwarz.ZNB and read the linked Rohde & Schwarz reverse-sweep FAQ. Inspect how frequency_start and frequency_stop are validated for measurement channels; done means the driver can represent a reverse sweep for a channel without rejecting a lower stop frequency.
Written by the indexing model from the issue text.
Description
Hi,
This is mainly a feature request but it would be nice if the user has the option to define a frequency sweep in the opposite direction for a measurement channel. Currently for instance, if measuring S21 for a DUT, we set
from qcodes.instrument_drivers.rohde_schwarz.ZNB import ZNB
station.add_component(
ZNB(
name="VNA",
address="<ip_address>",
init_s_params=True,
)
)
station.VNA.S21.frequency_start(500e6)
station.VNA.S21.frequency_stop(1000e6)
to perform the measurement. However, QCoDeS gives out an error when setting the attribute frequency_stop to be lesser than frequency_start.
Looking up the manual for the ZNB40 VNA in particular, we find a section on independently defining the port configuration via the K4 option (see this FAQ from R&S). Interestingly enough, atleast on the VNA we have at hand I was unable to find this option via the in-built local GUI of the VNA.
It would be nice if the driver could include this feature.
- Dominant language
- Python
- Stars
- 459
- Forks
- 359
- Avg merge
- 2d 10h
- Merged PRs (30d)
- 79
Getting set up
First steps
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