AKELA OpenVNA
|
|
AKELA OpenVNA
|
Higher-level object-oriented library for interfacing with one or more Akela VNAs. More...
Public Member Functions | |
| def | __init__ |
| Connect and initialize a remote VNA. More... | |
| def | set_config |
| Configure a connected VNA with specified hoprate, attenuation and (optional) linear sweep parameters. More... | |
| def | start |
| Proxy for RAW_VNA::start() | |
| def | stop |
| Proxy for RAW_VNA::stop() | |
| def | measure_uncal |
| Routine to measure uncalibrated I-Q using an configured VNA task. More... | |
| def | measure_cal |
| Measure S-Parameters using the internal calibration mechanism from the DLL. | |
| def | save_dll_cal_auto |
| def | load_dll_cal_auto |
| def | save_dll_cal |
| Save the generated cal from the internal DLL calibration mechanism to a local file. More... | |
| def | load_dll_cal |
| Load a calibration data-set from a save file. More... | |
Higher-level object-oriented library for interfacing with one or more Akela VNAs.
This class serves as a wrapper for vnalibrary.py, which directly wraps the C++ code in vnadll. Functionally, everything here can be implemented using only vnalibrary.py.
Nevertheless, these routines are valuable as they abstract away some of the lower-level details of dealing with the hardware.
Note that this inherits from VNA.vnalibrary.RAW_VNA, so you can (and actually have to, for normal use) call RAW_VNA methods on it directly, without needing to manage two VNA instances.
| def __init__ | ( | self, | |
| device_ip, | |||
| device_ip_port, | |||
vna_no = None, |
|||
loglevel = logging.INFO |
|||
| ) |
Connect and initialize a remote VNA.
Sets up logging, creates a task instance to control the VNA, establishes connection with VNA on specified IP:port, initializes VNA and downloads hw details, queries task state, and emits some info to the logging interface at the DEBUG level.
| device_ip | (str) IP address of VNA hardware |
| device_ip_port | (int) IP port-number for connection. Typically 1024+ |
| vna_no | (int/str) Number/String inserted into logger path for the relevant VNA. The resultant logging path will be: Main.VNA-API-%s, where %s is the value of vna_no. If not specified, this will default to the ASCII IP for the VNA. |
| loglevel | (logging level) Set the log-level for the DLL interface. Defaults to logging.INFO if not specified. |
| def load_dll_cal | ( | self, | |
| filepath, | |||
checkip = True, |
|||
checkserial = True |
|||
| ) |
Load a calibration data-set from a save file.
| filepath | (string) Local filesystem path to where the saved calibration is located. |
| checkserial | (bool) Validate that the serial number from the calibration matches the serial number from the VNA. |
| checkip | (bool) Validate that the IP of the connected VNA is the same as the IP from the calibration. |
| def measure_uncal | ( | self, | |
verbosity = 0 |
|||
| ) |
Routine to measure uncalibrated I-Q using an configured VNA task.
| def save_dll_cal | ( | self, | |
| filepath | |||
| ) |
Save the generated cal from the internal DLL calibration mechanism to a local file.
| filepath | (string) Local filesystem path where the cal data will be saved. Note that if the file exists, it will be overwritten! |
VNA_Exception_Bad_Cal if there is no calibration to save.
| def set_config | ( | self, | |
| hoprate, | |||
| attenuation, | |||
freq = None |
|||
| ) |
Configure a connected VNA with specified hoprate, attenuation and (optional) linear sweep parameters.
| hoprate | (vna.HOP_x) frequency hop-rate from HopRateSettings-Py |
| attenuation | (vna.ATTEN_x) Set the tx attenuator to x db. Values from AttenuationSettings-Py |
| freq | (optional) three-tuple of frequencies used to generate a linear sweep of frequency points. Structure is (start_freq, stop_freq, num_points), where start_freq and stop_freq are frequency numbers in megahertz, and num_points is a simple integer. The sweep will be modified by utilFixLinearSweepLimits to fit the requested parameters to the allowable frequencies on actual hardware |
1.8.6 
