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8 Channel Power Measurement
FREQ Channel
Example
FREQ:CENT 50 MHz
FREQ:CENT UP changes the center frequency to 150 MHz if you use FREQ:CENT:STEP 100 MHz to
set the center frequency step size to 100 MHz
FREQ:CENT?
Notes
This command sets either the RF or I/Q Center Frequency depending on the selected input.
For RF input it is equivalent to FREQ:RF:CENT
For I/Q input it is equivalent to FREQ:IQ:CENT
Preset and Max values are dependent on Hardware Options (5xx)
If no terminator (e.g. MHz) is sent the terminator Hz is used. If a terminator with unit other than
Frequency is used, an invalid suffix error message is generated.
Dependencies
The Center Frequency can be limited by Start or Stop Freq limits, if the Span is so large that Start or
Stop reach their limit.
Couplings
When operating in “swept span”, any value of the Center Frequency or Span that is within the
frequency range of the analyzer is allowed when the value is being set through the front panel
numeric key pad or the SCPI command. The other parameter is forced to a different value if needed,
to keep the Start and the Stop Frequencies within the analyzer’s frequency range
Preset
Depends on instrument maximum frequency, mode, measurement, and selected input.
"Center Frequency Presets" on page 378
State Saved
Saved in instrument state
Min
Depends on instrument maximum frequency, mode, measurement, and selected input..
"Center Frequency Presets" on page 378
Max
Depends on instrument maximum frequency, mode, measurement, and selected input..
"Center Frequency Presets" on page 378
Default Unit
Hz
Status Bits/OPC
Dependencies
Non-overlapped
Initial S/W Revision
Prior to A.02.00
Center Frequency Presets
The following table provides the Center Frequency Presets for the Spectrum Analyzer mode, and the Max
Freq, for the various frequency options:
Freq Option
CF
after Mode Preset
Stop Freq after
Mode Preset
Max Freq
(can't
tune
378
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 ...