11 Occupied Bandwidth Measurement
BW
BW
Accesses a menu of functions that enable you to specify and control the video and resolution bandwidths.
You can also select the type of filter for the measurement.
Key Path
Front-panel key
Initial S/W Revision
Prior to A.02.00
Res BW
Sets the resolution bandwidth for the current measurement. If an unavailable bandwidth is entered with
the numeric keypad, the closest available bandwidth is selected.
Key Path
BW
Mode
SA, WCDMA, C2K, WIMAX OFDMA, TD-SCDMA, 1xEVDO, ISDB-T, CMMB, LTE, LTETDD,
BLUETOOTH, WLAN, MSR
Remote Command
[:SENSe]:OBWidth:BANDwidth[:RESolution] <bandwidth>
[:SENSe]:OBWidth:BANDwidth[:RESolution]?
[:SENSe]:OBWidth:BANDwidth[:RESolution]:AUTO ON|OFF|1|0
[:SENSe]:OBWidth:BANDwidth[:RESolution]:AUTO?
Example
OBW:BAND 250000
OBW:BAND?
OBW:BAND:AUTO OFF
OBW:BAND:AUTO?
Notes
You must be in the Spectrum Analysis mode, W-CDMA mode, cdma2000 mode, TD-SCDMA
mode,ISDB-T mode, CMMB mode, LTE mode, LTE TDD mode,BLUETOOTH mode, WLAN mode,
1xEVDO mode, MSR or WIMAX OFDMA mode to use this command. Use:INSTrument:SELect to set
the mode.
Couplings
Sweep time is coupled to RBW. As the RBW changes, the sweep time (if set to Auto) is changed to
maintain amplitude calibration.
Video bandwidth (VBW) is coupled to RBW. As the resolution bandwidth changes, the video
bandwidth (if set to Auto) changes to maintain the ratio of VBW/RBW (10:1).
When Res BW is set to Auto, the resolution bandwidth is auto-coupled to span. The ratio of
Span/RBW is approximately 106:1 when auto coupled. When Res BW is set to Man, bandwidths are
entered manually, and these bandwidths are used regardless of other analyzer settings.
Preset
SA: Auto
WCDMA: 30 kHz
CDMA2K: 12 kHz
WIMAX OFDMA: 100 kHz
TD-SCDMA: 30 kHz
1xEVDO: 30 kHz
ISDB-T: 10 kHz
1344
W-CDMA & HSPA Measurement Applications Reference
Summary of Contents for E6640A
Page 80: ...Table of Contents lxxx W CDMA HSPA Measurement Applications Reference ...
Page 188: ...3 Programming the Test Set Common Commands 188 W CDMA HSPA Measurement Applications Reference ...
Page 256: ...5 Mode Functions Mode Setup 256 W CDMA HSPA Measurement Applications Reference ...
Page 324: ...6 System Functions System 324 W CDMA HSPA Measurement Applications Reference ...
Page 369: ...8 Channel Power Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 369 ...
Page 389: ...8 Channel Power Measurement Marker W CDMA HSPA Measurement Applications Reference 389 ...
Page 664: ...9 ACP Measurement Auto Couple 664 W CDMA HSPA Measurement Applications Reference ...
Page 669: ...9 ACP Measurement BW W CDMA HSPA Measurement Applications Reference 669 ...
Page 984: ...9 ACP Measurement View Display 984 W CDMA HSPA Measurement Applications Reference ...
Page 1001: ...10 Spectrum Emission Mask Measurement W CDMA HSPA Measurement Applications Reference 1001 ...
Page 1668: ...12 Code Domain Measurement Auto Couple 1668 W CDMA HSPA Measurement Applications Reference ...
Page 2354: ...14 QPSK EVM Measurement 2354 W CDMA HSPA Measurement Applications Reference ...
Page 2364: ...14 QPSK EVM Measurement Auto Couple 2364 W CDMA HSPA Measurement Applications Reference ...