HP 8530A, Operating And Programming Manual, Page: 68 / 439

Front P anel F eatures
A ctive Entry Area
The active entry area of the display identies the current active function for the selected
channel/parameter , and matches the color of the active channel/parameter to emphasize the
channel/parameter you are controlling. Press 4 ENTRY OFF 5 to clear this area.
Title Area
The title area provides a space to enter up to 50 characters of information about the
measurement. Notice that the location of this area depends on the display mode . An example
of how to create a title is given in this chapter in later paragraphs .
System Messages Area
Prompts , error messages , and procedural advisories appear in the system messages area located
below the Channel 1 identication labels .
If an error that aects the measurement occurs , a message is displayed and a \beep" may signal
you to look at the message .
Note
An Error message remains on the display until:
It is replaced by another system message .
Y ou press a function key such as 4
ST ART
5 or 4
USER PRESET
5 .
Y ou manually clear the message by pressing 4 ENTRY OFF 5 (located above the
knob).
Note that error messages do not disappear automatically . This it is possible for
an error message to remain on the display , even if the error condition no longer
exists .
One-Character Special Display Annotations
Along the left side of the screen, certain one-character labels appear when you select receiver
functions that aect the accuracy or presentation of the measurement trace . These labels are:
* = Measurement Incomplete .
A = A veraging is ON.
C = Calibration is ON.
D = Normalization, Electrical Delay , Phase Oset, Magnitude Oset, or Magnitude Slope ON.
E = External or HP-IB trigger mode is ON.
G = Time Domain Gating ON.
H = Hold mode is ON.
M = Multiple Source ON.
O = P ower has changed more than 24 dB between adjacent data points , and automatic IF
gain control could not fully track the change . This reduces measurement accuracy by a very
small amount. Refer to \IF Gain" near the end of Chapter 17.
S = Smoothing is ON.
These symbols are present if the given condition exists on any displayed channel/parameter .
That is , for dual channel displays , if either channel has smoothing turned on, the \S" is shown.
The measurement incomplete symbol \*" is displayed in several situations . After any
measurement restart, it signies that the rst sweep has not been completed. When this
Front and Rear Panel 3-3