HP 8590 E-Series User Manual page 249

All E-Series and L-Series spectrum analyzers except HP 85901; with
MK COUNT
ON OFF
turns on the marker counter when ON is underlined. If no marker is active
before MK COUNT ON OFF is pressed, a marker is activated at center screen.
Press MK COUNT ON OFF (so that OFF is underlined), to turn the marker
counter off. Press CNT RES AUTO MAN to change the marker counter
resolution to an uncoupled value.
An (*) may appear in the upper right of the display along with the message
Marker Count. The ratio of the resolution bandwidth to span must be
greater than 0.01 for the marker count function to work properly. Reduce
Span appears on screen if the bandwidth to span ratio is less than 0.01. If
Option 130, narrow resolution bandwidth, is not installed, the marker count
function is limited to resolution bandwidths 2300 Hz. Widen RES BW indicates
that the resolution bandwidth must be increased. The function will count the
largest signal is a 300 Hz bandwidth even if a narrower bandwidth setting is
used.
Front-Panel Key Access: [MKR]
reads out the average noise level, referenced to a 1 Hz noise power bandwidth,
MK NOISE
at the marker position. If no marker is present, a marker appears at the center
ON OFF
of the screen. The root-mean-square noise level, normalized to a 1 Hz noise
power bandwidth, is read out. The sample detector is activated.
Front-Panel Key Access: (jjj
stops the spectrum analyzer sweep at the marker position for the duration of
MK PAUSE
the dwell time. The dwell time can be set from 2 milliseconds to 100 seconds.
ON OFF
Front-Panel Key Access: ljZGG?%]
selects the marker readout to be displayed in signal frequency, sweep time, the
MK READ
inverse of the sweep time, or
F T I P
When the instrument is in zero span the frequency type readout cannot
selected.
Front-Panel Key Access: m
provides a list of the four available markers which is updated at the end of
MK TABLE
each sweep or when a marker is used. The marker data can be displayed in
ON OFF
different formats. It can be in absolute or delta frequency and amplitude
formats. There is also a delta display line format, which can be accessed using
the TABLE ADL NRM softkey.
The marker table is not saved with the m and Cm] keys.
Front-Panel Key Access: (jj]
MK TRACE
assigns a marker to a trace. Pressing MK TRACE AUTO ABC will activate a
AUTO ABC
marker on trace A if there are no markers turned on. If a marker is currently
active, press MK TRACE AUTO ABC until A, B, or C are underlined. The active
marker will be moved to the selected trace.
Selecting the AUTO mode will move the marker to the trace that is
automatically selected. The selection order is to first look for a trace in the
clear-write mode, in the order of trace A, then trace B, then trace C. If no
traces are currently being written, it will select a trace in the view-store mode,
again in the order of trace A, B, then C.
Front-Panel Key Access: m
7-56 Key Descriptions
the
period which is the inverse of the frequency.
be