SOURce<Ch>:POWer[:LEVel]

SOURce<Ch>:POWer...

This subsystem controls the power of the internal signal source and provides output port settings.

Command tree: SOURce<Ch>POWer

:CORRection(source power calibration commands)

[:LEVel|

[:IMMediate]

:PERManent

Note: The SOURce<Ch>:POWer... subsystem comprises port-specific and general settings. Port-specific settings are valid for the port specified by the numeric suffix <Pt> (...:POWER<Pt>:...). General settings are valid for all test ports of the analyzer; the port suffix is ignored. Refer to the description of the individual commands for more information.

SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate][:AMPlitude] <numeric_value>

Defines the power of the internal signal source (channel power). The setting is valid for all sweep types except power sweep.

Use SOURce<Ch>:POWer<Pt>:STARt and SOURce<Ch>:POWer<Pt>:STOP to define the sweep range for a power sweep.

<Ch>	Channel number.
<Pt>	Test port number of the analyzer. This suffix is ignored because the selected channel power applies to all source ports used in the active channel. It is possible though to define a port-specific slope factor for the source power (SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate]:SLOPe). Moreover, it is possible to define a port-specific power offset (SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate]:OFFSet).
<numeric_value>	Internal source power.
Range [def. unit]	–40 dBm to +10 dBm. The exact range depends on the analyzer model; refer to the data sheet [dBm]. UP and DOWN increment/decrement the source power in 0.1-dB steps.
*RST value	0 dBm
SCPI, Command Types	Confirmed, command or query
Example:	FUNC "XFR:POW:RAT B1, A2" Activate a frequency sweep and select the ratio B1/A2 as measured parameter for channel and trace no. 1. SOUR:POW -6 Set the internal source power for channel 1 to -6 dBm. `SOUR:POW2:SLOP 10` Set the power slope factor for the wave transmitted at port 2 to 10 dB/GHz. The internal source power and the waves at the other test ports are not affected.

SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate]:OFFSet
<numeric_value>, ONLY | CPADd

Defines a port-specific source power or a power offset relative to the channel power (SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate][:AMPlitude]). An additional Cal Power Offset can be defined via SOURce<Ch>:POWer<Pt>:CORRection:LEVel:OFFSet.

<Ch>	Channel number.
<Pt>	Test port number of the analyzer.
<numeric_value>	Port-specific power offset.
Range [def. unit]	–300 dB to +300 dB [dB]. UP and DOWN increment/decrement the phase in 1-dB steps.
*RST value	0 dB
Offset parameters	ONLY – only the port-specific power is used; the channel power is ignored. CPADd – the port-specific power is added as an offset to the channel power.
*RST value	CPADd
SCPI, Command Types	Confirmed (with additional device-specific character data parameters), command or query
Example:	*RST; SOUR:POW -6 Reset the instrument, activating a frequency sweep and set the internal source power (channel power) for the default channel 1 to -6 dBm. SOUR:POW1:OFFS 6, ONLY; SOUR:POW2:OFFS 6, CPAD Replace the source power at port 1 by +6 dBm, the source power at port 2 by 0 dBm. The powers at the remaining ports (if available) are not affected.

SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate]:SLOPe <numeric_value>

Defines a linear factor to modify the internal source power at port <Pt> as a function of the stimulus frequency. The value can be set for frequency sweeps only.

<Ch>	Channel number.
<Pt>	Test port number of the analyzer.
<numeric_value>	Port-specific slope factor.
Range [def. unit]	–40 dB/GHz to +40 dB/GHz. The resulting power range over the entire frequency sweep must be within the power range of the analyzer; refer to the data sheet [dBm]. UP and DOWN increment/decrement the source power in 0.1-dB/GHz steps.
*RST value	0 dB/GHz
SCPI, Command Types	Device-specific, command or query
Example:	See SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate][:AMPlitude]

SOURce<Ch>:POWer<Pt>:PERManent[:STATe] <Boolean>

Defines whether the source power is permanently on.

<Ch>	Channel number.
<Pt>	Test port number of the analyzer.
<Boolean>	ON - Power at port <Pt> is permanently on OFF - Power is only on for the partial measurements that require the port as a drive port.
*RST value	OFF
SCPI, Command Types	Device-specific, command or query
Example:	SOUR:POW2:STAT ON Switch the RF power at port no. 2 on. SOUR:POW2:PERM ON Activate a permanent signal source.

SOURce<Ch>:POWer<Pt>:STARt <numeric_value>

Defines the start power for a power sweep which is equal to the left edge of a Cartesian diagram. A power sweep must be active ([SENSe<Ch>:]SWEep:TYPE POWer) before this command can be used.

<Ch>	Channel number.
<Pt>	Test port number of the analyzer. This suffix is ignored because the selected power sweep range applies to all source ports used in the active channel.
<numeric_value>	Start power of the sweep.
Range [def. unit]	–40 dBm to +9.99 dBm. The exact range depends on the analyzer model; refer to the data sheet [dBm]. UP and DOWN increment/decrement the source power in 1-dB steps.
*RST value	–25 dBm
SCPI, Command Types	Confirmed, command or query
Example:	SWE:TYPE POW Activate a power sweep. SOUR:POW:STAR -6; STOP 10 Select a power sweep range between –6 dBm and +10 dBm.

Note: If the start power entered is greater than the current stop power (SOURce<Ch>:POWer<Pt>:STOP), the stop power is set to the start power plus the minimum power span of 0.01 dB.

SOURce<Ch>:POWer<Pt>:STATe <Boolean>

Turns the RF source power at a specified test port on or off.

<Ch>	Channel number.
<Pt>	Test port number of the analyzer.
<Boolean>	ON \| OFF - Turns the internal source power at the specified test port no. <Pt> on or off.
*RST value	ON
SCPI, Command Types	Device-specific, command or query
Example:	*RST; SOUR:POW -6 Set the internal source power for channel 1 and all test ports to -6 dBm. SOUR:POW2:STAT? Query whether the source power at test port 2 is on. The analyzer returns a 1.

SOURce<Ch>:POWer<Pt>:STOP <numeric_value>

Defines the stop power for a power sweep which is equal to the right edge of a Cartesian diagram. A power sweep must be active ([SENSe<Ch>:]SWEep:TYPE POWer) before this command can be used.

<Ch>	Channel number.
<Pt>	Test port number of the analyzer. This suffix is ignored because the selected power sweep range applies to all source ports used in the active channel.
<numeric_value>	Stop power of the sweep.
Range [def. unit]	–39.99 dBm to +10 dBm. The exact range depends on the analyzer model; refer to the data sheet [dBm]. UP and DOWN increment/decrement the source power in 1-dB steps.
*RST value	0 dBm
SCPI, Command Types	Confirmed, command or query
Example:	SWE:TYPE POW Activate a power sweep. SOUR:POW:STAR -6; STOP 10 Select a power sweep range between –6 dBm and +10 dBm.

Note: If the stop power entered is greater than the current start power (SOURce<Ch>:POWer<Pt>:STARt), the start power is set to the stop power minus the minimum power span of 0.01 dB.