Agilent Technologies E4991A Service Manual page 350

Messages
No fixed delta marker
SYST:ERR? command has been sent by GPIB. When the equipment finds no occurrence
of an error, a message is returned as error number 0.
94 No fixed delta marker
Because the reference marker is not set to fixed  mode, the sent command has been
ignored. For example, when the fixed  mode is not set, the CALC{1-5}:MARK:REF:Y
command has been attempted in order to set the reference marker to the designated
measurement values.
First use the CALC{1-5}:MARK:REF command to display the reference marker. Next, use
the CALC{1-5}:MARK:REF:TYPE command to change the setting to fixed  mode.
90 No marker delta - parameter not set
This occurs when the reference marker's  mode is Off and the CALC{1-5}:MARK:SET
command or CALC{1-5}:MARK:FUNC:DOM:SPAN command has been attempted in
order to set the  value to span value within the sweep range or within the partial search
range.
First use the CALC{1-5}:MARK:REF command to display the reference marker. Next, use
the CALC{1-5}:MARK:REF:TYPE command to set the  Mode or Fixed  Mode to On.
114 No memory trace displayed
Due to the fact that memory trace is not displayed, a command that has been sent was
ignored. For example, when the memory trace is not displayed, the
DISP:TRAC{1-5}:Y:FOR command is attempted in order to set the scale setting subject as
the data trace.
First use the CALC{1-5}:MATH:FUNC command to display the memory trace.
30 No Valid Memory Trace
This occurs when there are no data stored in the Memory Trace and the
CALC{1-5}:MATH:FUNC command has been attempted in order to display the Memory
Trace.
Before displaying the Memory Trace, use the CALC{1-5}:MATH:MEM command to store
the data into the Memory Trace.
140 Not allowed for the current trigger source
An invalid command for the presently selected trigger source has been sent. For example,
when the trigger source is set to internal trigger (
been attempted in order to set the trigger event mode (detecting point for triggering) at each
measurement point (
internal trigger is not set as the trigger source.
After setting the trigger source to
Event Mode.
14 Not allowed in power sweep
An invalid command has been sent to the oscillator level sweep while it is in progress. For
example, during the oscillator level sweep, the SWE:TYPE command has been attempted
in order to set the sweep type to log sweep. This operation is invalid during the oscillator
level sweep.
Confirm that the command is valid for the oscillator level sweep.
70 Not allowed in this measurement mode
350
) or at each (
On Point On Segment
,
Manual External
), the TRIG:EVEN command has
Internal
). This operation is valid only when
or , change the Trigger
GPIB Bus
Appendix E