Agilent Technologies 8560E User Manual page 254

Key Function Descriptions
Key Descriptions
The MKR∆ → CHPWR BW softkey can be used to
change the desired channel power bandwidth to the
frequency difference between the two markers that are
currently on the signal. The MKR MEAN → CF is then
used to center this bandwidth on the display.
Front-panel key access:
Not available when a tracking generator is
MKR NOISE ON OFF
active.Turns the marker noise function ON or OFF.
When ON, this function normalizes the equivalent
amplitude of the measured noise to a 1 Hz bandwidth.
To do this, it sets the detector mode to sample and
displays the average of 33 data points (16 data points to
the left of the marker, the marker itself, and 16 data
points to the right of the marker).
This average is corrected for effects of the log amplifier,
bandwidth shape factor, RF detector, and resolution
bandwidth. If two markers are on, MKRNOISE ON
OFF works on the active marker and not on the anchor
marker.
When MKR NOISE ON OFF is ON, the sample detector
mode is initiated. This is the most appropriate detector
mode for making noise measurements. Turning off the
active marker also turns off MKRNOISE ON OFF, and
returns the detector mode to its previous setting.
Front-panel key access:
Gives access to additional functions of an option
MODULE
module, such as the Agilent 85629B test and
adjustment module or the Agilent 85620A mass
memory module, when the module is connected to J3,
OPTION MODULE, on the rear of the spectrum
analyzer. If an option module is not connected when the
MODULE
message appears. For specific information on operating
an option module, refer to the operating manual for
that module.
Front-panel key access:
Selects negative mixer bias for an external mixer. This
NEGATIVE BIAS
value, which can be entered using the data keys, the
step keys, or the knob, appears in the active function
block and is expressed in milliamps. When the bias is
less than 0 mA, a "−" appears on the left edge of the
display.
Front-panel key access:
254
MEAS/USER
MKR
key is pressed, the MODULE NOT FOUND
MODULE
AUX CTRL
Chapter 4