HP 8712C, User Manual, Page: 376 / 559

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Front/Rear Panel
Display
1
The data ? status notation in the upper left corner of the display screen indicates that the analyzer source or
receiver parameters have changed since the last complete sweep.
2
The active measurement channel indicator is designated by a solid triangle The active measurement channel’s
data trace and other parameter data is indicated by being brighter than the inactive measurement channel’s data.
3
The measurement channel parameters for both channels always appear at the top of the display in this area.
The
type
of measurement for each measurement channel is displayed here. If a measurement channel is turned off,
the display says “Off’ hare.
6 This is the display format that is selected using the key.
6 This is the that is selected using the key, in units appropriate to the current measurement.
7 This is the reference level. This value is the reference line in Cartesian formats or the outer circle in polar formats.
The reference level is selected using the key.
A appears hare when a user-defined calibration is in If the frequency span has been narrowed, the
notation becomes to indicate that interpolated error correction is
9
The message area is where you will receive messages from the analyzer from time to time. Most messages appear
only for a few moments before disappearing.
10
This area indicates whether the scale is absolute or relative
11
The sweep indicator appears here in the lower left corner of the display when the analyzer is sweeping at a rate
of lass than 1.5 s. At sweeptimes above 1.5 the sweep indicator moves
the screen with the data trace.
12
The reference level for the active measurement channel is indicated by a small triangle adjacent to the graticule
on the left.
13
and date area.
14
Active entry area: used to enter or adjust values for operating parameters.
16
Marker annotation area.
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I
1 6 When averaging is turned on, the average indicator appears hare.
1 If a uncalibrated) appears here
at any
time, your will
not
accurate measurements and needs servicing. See Table
in Chapter 10 far a list of Hewlett-Packard sales and service
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