Spectral Measurements:ACP:Results:Measurement Start Channel Property

Short Name: ACP Measurement Start Channel

Property of niBTAnalysis

Returns the start channel used for the adjacent channel power (ACP) measurement. The toolkit computes the start channel based on the device under test (DUT) transmit channel number and the ACP Number of Channels property.

If you set the ACP Offset Channel Position property to InBand, the toolkit measures the number of channels around the DUT transmit channel number and limits the channel power measurements within the Bluetooth band for Basic Rate packets. Valid values for measurement start channel are 0 to 78, inclusive.

If you set the ACP Offset Channel Position property to Centered, the toolkit calculates the measurement start channel using the following formula: (value returned by the ACP Number of Channels property - 1)/2.

For example, if the DUT transmit channel number is 3 and the number of channels is 5, the measurement start channel is 1. The toolkit computes the channel powers for channel numbers 1 to 5, inclusive.

Another example would be if the DUT transmit channel number is 3 and the number of channels is 11, the measurement start channel is 0. The toolkit computes the channel powers for channel numbers 0 to 10, inclusive.

Remarks

The following table lists the characteristics of this property.

Datatype
Permissions	Read Only
High-level VIs	niBT SA ACP Get Measurement Start Channel
Resettable	No