LO:LO Injection Side Property

RFmx TD-SCDMA 19.1 Help

Edition Date: October 2019

Part Number: 375493H-01

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RFmx TD-SCDMA 19.1 Help
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Short Name: LO Injection Side

Property of RFmxInstr

Specifies the LO injection side.

PXIe-5663/5663E For frequencies below 517.5 MHz or above 6.4125 GHz, the LO injection side is fixed, and the RFmx driver returns an error if you specify an incorrect value. If you do not configure this property, the RFmx driver selects the default LO injection side based on the downconverter center frequency. Reset this property to return to automatic behavior.
PXIe-5665 (3.6 GHz) Setting this property to Low Side is not supported for this device.
PXIe-5665 (14 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-5668 Setting this property to Low Side is supported for some frequencies in high band, varying by the final IF frequency. This configuration is not calibrated and device specifications are not guaranteed.

Default value:

  • PXIe-5663/5663E (frequencies < 3.0 GHz): High Side
  • PXIe-5663/5663E (frequencies >= 3.0 GHz): Low Side
  • PXIe-5665/5668: High Side

Supported devices: PXIe-5663/5663E/5665/5668

High Side (0)

Configures the LO signal that the device generates at a frequency higher than the RF signal. This LO frequency is given by the following formula: fLO = fRF + fIF

Low Side (1)

Configures the LO signal that the device generates at a frequency lower than the RF signal. This LO frequency is given by the following formula: fLO = fRF – fIF

Remarks

The following table lists the characteristics of this property.

Datatype /images/reference/en-XX/help/375493H-01/ci32.gif
PermissionsRead/Write
High-level VIs N/A
ResettableYes

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