Keysight E6640A, Measurement Applications User & Programmer Reference

Page: 975 / 2870

9 ACP Measurement
View/Display
This is the power in the reference carrier. The power is calculated by integrating across the bandwidth
declared by the Carrier Integ Bw parameter for that carrier. The integration bandwidth is shown as part of
the result. This is the value of the Carrier Integ Bw for that carrier unless the RRC Filter is on, then the
integration bandwidth used is the displayed value, which is (1 + alpha)/T where T = 1/(Carrier Integ Bw).
Carrier Power
This is the power in all the currently defined carriers. If the carrier has carrier power present, the power will
be absolute. If the carrier is defined as not having power present, the power will be relative to the
reference carrier. The power is calculated by integrating across the bandwidth declared by the Carrier
Integ Bw parameter. The integration bandwidth is shown as part of the result. This is the value of the
Carrier Integ Bw for the carrier unless the RRC Filter is on, then the integration bandwidth used is the
displayed value, which is (1 + alpha)/T where T = 1/(Carrier Integ Bw).
As there are potentially more results than can be easily viewed on the display, a scrollable list is used to
display all results. The Carrier Results menu key is used to index the carrier amplitude results. This key isle
grayed out unless the measurement is in single mode (as in continual measurement mode). The display is
continuously updating and will not need to be accessed. The currently selected Carrier Result is displayed
on the last line of the carrier power result list unless:
•
The selected Carrier Result is 4 or less in normal multi carrier power results view. In this case the first 4
carrier power results will be displayed.
•
The selected Carrier Result is 9 or greater in normal multi carrier power results view. In this case the last
4 carrier power results will be displayed.
•
The zoom mode is selected. In this case all carrier power ranges can be displayed.
Offset Relative Power
This is the power in the offsets relative to the reference carrier. The power is calculated by integrating
across the bandwidth declared by the Offset Integ Bw parameter. The offset integration bandwidth is
shown as part of the result. This is the value on the Offset Integ Bw menu key unless the RRC Filter is on,
then the integration bandwidth used is the displayed value, which is (1 + alpha)/T where T = 1/(Offset Integ
Bw).
Offset Absolute Power
This is the absolute power in the offsets. The power is calculated by integrating across the bandwidth
declared by the Offset Integ Bw parameter. The offset integration bandwidth is shown as part of the result.
This is the value on the Offset Integ Bw menu key unless the RRC Filter is on, then the integration
bandwidth used is the displayed value, which is (1 + alpha)/T where T = 1/(Offset Integ Bw).
Inside Adjacent Channel Power (DTMB (CTTB) and CMMB only)
This result is only valid for DTMB (CTTB) transmitterand CMMB transmitter. It contains two parts: Relative
Power and Absolute Power. The power is calculated by integrating across the bandwidth (Integ Bw) at the
frequency Offset A.
Inside Absolute Power = MAX (PLower Offset A, PUpper Offset A);
Inside Relative Power = Inside Absolute Power – Carrier Power;
Outside Adjacent Channel Absolute Power (DTMB (CTTB) and CMMB only)
This result is only valid for DTMB (CTTB) transmitter and CMMB transmitter. It contains two parts: Relative
Power and Absolute Power. The power is the Root-Mean-Square of the power calculated by integrating
across the bandwidth (Integ Bw) at frequency Offset B, C and D.
W-CDMA & HSPA Measurement Applications Reference 975