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11 Occupied Bandwidth Measurement
FREQ Channel
When Restore Input/Output Defaults is performed, the mixer presets to the 11970A, whose Start
and Stop frequencies are 26.5 and 40 GHz respectively. The center of these two frequencies is
33.25 GHz.
Therefore, after a Restore Input/Output Defaults, if you go into External Mixing and do a Mode Preset
while in the Spectrum Analyzer Mode, the resulting Center Freq is 33.25 GHz.
State Saved
Saved in instrument state.
Min
The minimum frequency in the currently selected mixer band + 5 Hz
Max
The maximum frequency in the currently selected mixer band – 5 Hz
If the knob or step keys are being used, also depends on the value of the other three interdependent
parameters Span, Start Frequency and Stop Frequency
Initial S/W Revision
A.08.01
I/Q Center Freq
SCPI command for specifying the I/Q Center Frequency. This command will set the Center Frequency to be
used when the I/Q input is selected, even if the I/Q input is not the input which is selected at the time the
command is sent. Note that the Center Freq function in the Frequency menu on the front panel always
applies to the currently selected input.
Scope
Meas Global
Remote Command
[:SENSe]:FREQuency:IQ:CENTer <freq>
[:SENSe]:FREQuency:IQ:CENTer?
Example
FREQ:IQ:CENT: 30 MHz
Notes
This command is the same in all modes, but the parameter is Measurement Global. So the value is
independent in each mode and common across all the measurements in the mode.
Preset
0 Hz
State Saved
Saved in instrument state.
Min
–40.049995 MHz
Max
40.049995 MHz
Initial S/W Revision
Prior to A.02.00
CF Step
Changes the step size for the center frequency and start and stop frequency functions. Once a step size
has been selected and the center frequency function is active, the step keys (and the UP|DOWN
parameters for Center Frequency from remote commands) change the center frequency by the step-size
value. The step size function is useful for finding harmonics and sidebands beyond the current frequency
span of the analyzer.
Note that the start and stop frequencies also step by the CF Step value.
1356
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 ...