1264
Span
Full Span
Changes the frequency span of the test set to the Preset frequency span of the test set and sets the Frequency entry mode to Center/Span.The span is dependent on the currently selected Input (see the Section “Input/Output”). Pressing this key while in zero span puts the test set back in swept span.Couplings Span affects RBW, sweeptime, FFT & Sweep choice (including FFT Width,
Phase Noise Optimization and ADC Dither auto couplings.)
When operating in “swept span”:
• Any value of the Center Frequency or Span that is within the frequency
range of the test set 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 test set’s frequency range
• When using the knob or the step up/down keys or the UP |DOWN
keywords in SCPI, the value that is being changed i.e. the Center
Frequency or Span, is limited so that the other parameter is not forced to a
new value
• The Span cannot be set to Zero by setting Start Frequency = Stop
Frequency. The value of the last setting is changed to maintain a minimum
value of 10 Hz for the difference between start and stop frequencies.
Preset Depends on test set maximum frequency:
Option 503 (3.6 GHz models): 3.59 GHz
Option 504 (3.8 GHz models): 3.8 GHz
State Saved Saved in State
Min 10 Hz unless entered directly, then 0 Hz is allowed, but nothing between 0 and
10 is ever allowed.
Max Option 503 (3.6 GHz models): 3.7 GHz
Option 504 (3.8 GHz models): 3.9 GHz
If the knob or step keys are being used, depends on the value of the other three
interdependent parameters Center Frequency, Start Frequency, Stop
Frequency
Default Unit Hz
Status Bits/OPC dependencies Overlapped if Signal Track is on (OPC shouldn’t return or clear until the
zooming has completed for the new span)
Initial S/W Revision Prior to A.02.00
Key Path SPAN X Scale
Remote Command [:SENSe]:FREQuency:SPAN:FULL