Write / Read

About Source Power Cal

Description

Sets or returns a power level offset from the VNA test port power. This can be a gain or loss value (in dB) to account for components you connect between the source and the reference plane of your measurement. For example, specify 10 dB to account for a 10 dB amplifier at the input of your DUT.

Cal power is the sum of the test port power setting and this offset value. Following the calibration, the VNA power readouts are adjusted to the cal power.

This property performs the same function as the power offset argument on SetCalInfoEx Method, except that this property can read the offset value.

VB Syntax

chan.SourcePowerCalPowerOffset (sourcePort) = value

Variable

(Type) - Description

chan

(object) -  A Channel object

sourcePort

(long integer) - The source port for which to set this power offset value.

value

(double) - Gain or loss value in dB. Choose a value between -200 and 200.

Return Type

Double

Default

0 dB

Examples

chan.SourcePowerCalPowerOffset(1) = 10 'Write
offset = chan.SourcePowerCalPowerOffset(2) 'Read

C++ Syntax

HRESULT get_SourcePowerCalPowerOffset(long sourcePort, double *pVal);

HRESULT put_SourcePowerCalPowerOffset(long sourcePort, double newVal);

Interface

IChannel4