Operation Overview
Model 3585A
3-10
b. Markers:
1 . Tunable Marker:
Positioned with
...
O .
0 ,
or by otherwise changing the
Manual frequency. Used for direct measurement of on-screen responses or for
real-time measurements in the Manual mode.
2. Stationary (Offset) Marker
OffSET
With
0
activated, the stationary marker appears at the point on the CRT
trace that represents the Offset reference frequency.
3 . Sweep Marker:
Displayed, when Sweep Time is
�
1 second, to indicate the position of the fre
quency sweep.
c. Display Line:
OSPL LINE
When the
0
function if activated, a horizontal Display Line appears on the
OSPL L I NE
CRT screen. The Display-Line amplitude can be adjusted with
0
0
to
measure the trace amplitude in "dB" relative to the Reference Level (top
graticule line).
d. Measurement Data:
The Frequency/Amplitude readout, in the top-right corner of the CRT screen,
displays the Marker, Counter, Manual or Offset frequency and amplitude or the
Display-Line amplitude, depending on which MARKER/CONTINUOUS EN
TRY functions are activated.
e. Current values of all pertinent operating parameters.
f. Operating Messages:
1 . Status Messages; e.g. , "CALIBRATING"
2. Entry Requests; e.g., "ENTER REG. NUMBER"
3. Operator Error Messages; e.g., "OUT OF RANGE"
4.
Calibration Error Codes; e.g., "CALIBRATION ERROR 01 "
g. Externally-generated graphics and alphanumerics, remotely entered via the HP-lB.
