HP ESA-L1500A, Руководство пользователя и калибровки

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Chapter 4 113
Front-Panel Key Reference
Trace
Operations
accesses the following
Operations
menu keys:
A
↔
B
exchanges the contents of the trace A register with the
trace B register and puts trace A in view mode. Key
Access:
Trace
,
Operations
B - DL
→
B
subtracts the display line from trace B and places the
result in trace B. The B - DL
→
B function is a math
operation. Key Access:
Trace
,
Operations
B
↔
C
exchanges the contents of trace B with trace C and puts
trace B in view mode. Key Access:
Trace, Operations
A
→
C
copies trace A into trace C. Key Access:
Trace
,
Operations
B
→
C
copies trace B into trace C. Key Access:
Trace
,
Operations
Normalize
accesses the following
Normalize
menu keys:
Normalize On Off
copies trace A into trace B, subtracts trace B from
trace A and adds the result to the normalized reference
level. The result is displayed in trace A. The trace data
is normalized with respect to the normalized reference
level, even if the value of the normalized reference level
is changed. This function remains in effect on all
subsequent sweeps until it is turned off. A minus sign
(-) appears between the trace A status and the trace B
status in the display annotation while the function is
active. To turn off the normalize function, press
Normalize On Off
so that Off is underlined.
CAUTION
When using normalization, the mode of traces B and C should not be
changed.
CAUTION
Trace A should be in clear write mode prior to setting normalize to on.
The normalize function is most useful for applying
correction data to a trace while making a stimulus
response measurement with a tracking generator. For
example, connect the cables and a thru line, in place of
the device to be measured, between a tracking
generator and the spectrum analyzer input. Notice that
the frequency response is not perfectly flat, showing the
response of the cables, as well as the flatness of both
the tracking generator and the spectrum analyzer.
Turn
Normalize On
. Notice that the displayed trace is
now flat, or normalized. The position of the normalized
trace can now be moved to a different position on the
display by changing the normalized reference position.
This may be useful if the device to be tested has