NIRFSA_ATTR_LO_FREQUENCY
- Updated2025-02-03
- 1 minute(s) read
NIRFSA_ATTR_LO_FREQUENCY
Specific Attribute
| Data type |
Access | High Level Functions |
|---|---|---|
| ViReal64 | R/W | None |
Description
Specifies the LO signal frequency for the configured center frequency.
If you are using the NI RF vector signal analyzer with an external LO, use this attribute to specify the LO frequency that the external LO source passes into the LO IN or LO1 IN connector on the RF downconverter front panel. If you are using an external LO, reading the value of this attribute after configuring the rest of the parameters returns the LO frequency needed by the device.
Set this attribute to the actual LO frequency because NI-RFSA corrects for any difference between expected and actual LO frequencies.
To use this attribute for the PXIe-5830/5831/5832, you must use the channelName parameter of the niRFSA_SetAttributeViReal64 function to specify the name of the channel you are configuring. You can configure the LO1 and LO2 channels by using lo1 or lo2 as the channel string, or set the channel string to lo1,lo2 to configure both channels. For all other devices, the the only valid value for the channel string is "" (empty string).
Default Values:
PXIe-5694: 215 MHz
All other devices: 0
Supported Devices: PXIe-5601/5603/5605/5606 (external digitizer mode), PXIe-5644/5645/5646, PXIe-5663/5663E/5665/5667/5668, PXIe-5694, PXIe-5830/5831/5832/5840/5841/5842
Related Topics
PXIe-5830 Frequency and Bandwidth Configuration