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C O U P L E D F U N C T I O N
GENERAL DESCRIPTION
This chapter describes the COUPLED FUNCTION group and its use in various measurements. The COUPLED
FUNCTIONS control the receiver characteristics of the spectrum analyzer.
The values of the COUPLED FUNCTION are automatically selected by the analyzer to keep absolute amplitude
and frequency calibration as frequency span and reference level are changed. * The functions are all coupled with
LINE power ON, a m or I";':) FULL SPAN key, or when their individual [1u10) is activated.
For each COUPLED FUNCTION:
Sets the function to the preset value dictated by the analyzer's current state. The function is
AUTO
coupled.
MA UAL
Function value will not change with instrument state. DATA entry changes value. The MAN-
UAL light goes on and stays on until the function is placed in m once again.
I
[
In most cases, the [-1 coupled functions will change values
of the others are manually set. If the amplitude or frequency becomes uncalibrated, "MEAS UNCAL" appears in
the right-hand side of the graticule.
*Center frequency step size does not affect amplitude or frequency calibration.
Chapter 8
Function
I
C O U P L E D F U N C T I O N Ill
L
i
RES
Function
Sweeptime, full scale
Video Bandwidth
Resdution Bandwidth
maintain amplitude calibration when one or more
to
GENERAL DESCRIPTION
OFF
MANUAL
Light
I
ON
I
Center Frequency
Step Size
RF Attenuation
Manual Operation 69
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