LO:Tuning Speed

Makes tradeoffs between tuning speed and phase noise.

For PXIe-5830/5831/5832, if you want to configure or read on LO1 or LO2 channel, use "lo1" or "lo2" as part of the selector string. You do not need to use a selector string or use "lo1, lo2" as part of the selector string if you want to configure this property for both channels. You can also use RFmxInstr Build LO String utility function to create the LO String. For all other devices, lo channel string is not allowed.

You do not need to use a selector string if you want to configure this property for all signal instances. Specify the signal name in the selector string if you want to configure or read on that signal instance. Refer to the Selector string topic for information about the string syntax.

Default value: Normal for PXIe-5663/5663E/5665/5668, Medium for PXIe-5644/5645/5646 and PXIe-5830/5831/5832/5840/5841/5842

Supported devices: PXIe-5644/5645/5646, PXIe-5663/5663E/5665/5668, PXIe-5830/5831/5832/5840/5841/5842

Remarks

The following table lists the characteristics of this property.

Short Name	Tuning Speed
Data type
Permissions	Read/Write
High-level VIs	N/A
Resettable	Yes

Normal	0	PXIe-5665/5668: Adjusts the YIG main coil on the LO for an underdamped response. PXIe-5663/5663E/5644/5645/5646: Specifies that the RF downconverter module uses a narrow loop bandwidth.
Medium	1	Specifies that the RF downconverter module uses a medium loop bandwidth. This value is not supported on PXIe-5663/5663E/5665/5668 devices.
Fast	2	PXIe-5665/5668: Adjusts the YIG main coil on the LO for an overdamped response. Setting this property to Fast allows the frequency to settle significantly faster for some frequency transitions at the expense of increased phase noise. PXIe-5663/5663E/5644/5645/5646: Specifies that the RF downconverter module uses a wide loop bandwidth.