Keysight E6640A, Measurement Applications User & Programmer Reference

Page: 925 / 2870

9 ACP Measurement
SPAN X Scale
SPAN X Scale
Accesses a menu of functions that enable you set the horizontal scale parameters.
Key Path
Front-panel key
Initial S/W Revision Prior to A.02.00
Span
Changes the frequency range symmetrically about the center frequency.
The default (and minimum) span is calculated using the number of carriers and the carrier width where;
Span = (Upper Carrier Freq + (max offset IBW * (1 + alpha)) / 2) - (Lower Carrier Freq - (max offset IBW * (1 +
alpha)) / 2)
The span is increased by a factor of 1 + Filter Alpha if the RRC Filter in on.
Key Path
SPAN X Scale
Mode SA, WCDMA, C2K, WIMAX OFDMA, TD-SCDMA, 1xEVDO, DVB-T/H, DTMB (CTTB), ISDB-T, CMMB,
LTE, LTETDD
Remote Command [:SENSe]:ACPower:FREQuency:SPAN <freq>
[:SENSe]:ACPower:FREQuency:SPAN?
Example ACP:FREQ:SPAN 25MHz
ACP:FREQ:SPAN?
Notes You must be in the mode that includes ACP measurements to use this command. Use
:INSTrument:SELect to set the mode.
Couplings The span value is clipped when the carrier settings and/or the offset settings are changed. The value
is changed to satisfy following formula:
Span = (Upper Carrier Freq + (max offset IBW * (1 + alpha)) / 2) - (Lower Carrier Freq - (max offset
IBW * (1 + alpha)) / 2)
Preset SA: 8 MHz
WCDMA: 24.6848 MHz
WIMAX OFDMA: 50 MHz
C2K: 4.5 MHz
TD-SCDMA: 8 MHz
1xEVDO: 4.05 MHz
LTE, LTETDD: 25 MHz
State Saved Saved in instrument state.
Min 10 Hz
Max Hardware Dependent:
Option 503 = 3.7 GHz
Option 507 = 7.1 GHz
W-CDMA & HSPA Measurement Applications Reference 925