Keysight E6640A, Measurement Applications User & Programmer Reference

Page: 2724 / 2870

15 Power Control Measurement
Source
RF Power Range
RF Output Port Frequency Range Min Output Power Max Output Power
High Power RF Out 10 MHz ≤ f ≤ 6 GHz –150 dBm 20 dBm
RFIO 1 & RFIO 2 10 MHz ≤ f ≤
6
GHz –150 dBm 0 dBm
GPS (Note2)
10 MHz ≤ f ≤
6
GHz
–150 dBm 0 dBm
Note: This is the UI power range, it’s larger than actual spec.
Note2: GPS port is on the multiport adapter, or E6607C which has embedded MPA.
Set Reference Power
This key allows you to set the power reference. Pressing this key turns the power reference state to ON,
sets the reference power value to the current RF output power, maintains this power at the RF output, and
sets the displayed power to 0.00 dB. All subsequent RF power values entered under
Source>Amplitude>RF Power are interpreted as being relative to this reference power.
When you use a power reference, the signal generator outputs an RF power that is set relative to the
reference power by the value entered under Source>Amplitude>RF Power as follows:
Output power = reference power − entered power
Where:
reference power equals the original RF Power entered under Source>Amplitude>RF Power and set as the
reference power
entered power equals a new value entered under Source>Amplitude>Amptd Offset
In addition, the displayed power value is the same as a new value entered under Source>Amplitude>RF
Power.
If Power Ref is set to ON with a reference value set, entering a value under Source>Amplitude>RF Power
and pressing Set Reference Power will add that value to the existing Power Ref value.
If you wish to change the reference power value to a new value entered under Source>Amplitude>RF
Power, first you must set Power Ref to OFF and then press Set Reference Power.
Key Path
Source, Amplitude
Dependencies This key is unavailable, and is grayed out when the "List Sequencer" on page 2801 is turned ON.
Initial S/W Revision A.05.00
Power Ref
This key allows you to toggle the state of the power reference.
When you use a power reference, the signal generator outputs an RF power that is set relative to the
reference power by the value entered under Source>Amplitude>RF Power as follows:
Output power = reference power + entered power
2724 W-CDMA & HSPA Measurement Applications Reference