Signal Path:Advanced:LO Injection Side Property
- Updated2024-05-08
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Signal Path:Advanced:LO Injection Side Property
Short Name: LO Injection Side
Property of niRFSA
Specifies the LO injection side.
PXIe-5601/5663/5663E—For frequencies below 517.5 MHz or above 6.4125 GHz, the LO injection side is fixed and NI-RFSA returns an error if you specify the incorrect value. If you do not configure this property, NI-RFSA selects the default LO injection side based on the downconverter center frequency. Reset this property to return to automatic behavior.
PXIe-5603/5665 (3.6 GHz)/5667 (3.6 GHz)—Setting this property to Low Side is not supported for this device.
PXIe-5605/5665 (14 GHz)/5667 (7 GHz)—Setting this property to Low Side is supported for this device for frequencies greater than 4 GHz, but this configuration is not calibrated, and device specifications are not guaranteed.
PXIe-5606/5668—Setting this property to Low Side is supported for some frequencies in high band, varying by final IF frequency. This configuration is not calibrated and device specifications are not guaranteed.
Default Values:
PXIe-5601 (external digitizer mode), PXIe-5663/5663E (frequencies < 3.0 GHz)—High Side
PXIe-5601 (external digitizer mode), PXIe-5663/5663E (frequencies ≥ 3.0 GHz)—Low Side
PXIe-5603/5605/5606 (external digitizer mode), PXIe-5665/5667/5668—High Side
Supported Devices: PXIe-5601/5603/5605/5606 (external digitizer mode), PXIe-5663/5663E/5665/5667/5668
| High Side (1300) |
Configures the LO signal that the NI-RFSA device generates at a frequency higher than the RF signal. This LO frequency is given by the formula fLO = fRF + fIF . |
| Low Side (1301) |
Configures the LO signal that the NI-RFSA device generates at a frequency lower than the RF signal. This LO frequency is given by the formula fLO = fRF – fIF . |
Remarks
The following table lists the characteristics of this property.
| Datatype |  |
| Permissions | Read/Write |
| High-level VIs | N/A |
| Channel-based | No |
| Resettable | Yes |