Softkeys Displayed By Pressing The [Bw/Avg] Key - Agilent Technologies 4294A Operating Manual

Key Definitions

Softkeys displayed by pressing the [Bw/Avg] key

Softkeys displayed by pressing the
Table B-32 Measurement bandwidth/averaging (Bw/Average) menu
Key operation: [Bw/Avg]
Softkey
BANDWIDTH [ ] ä Displays Table B-33, "Measurement bandwidth (Bandwidth) configuration
menu," on page 376. In [ ], the currently selected measurement bandwidth is
displayed.
AVERAGING RESTART Resets the sweep-to-sweep averaging function so that the sweep count starts
from ÇP at the next sweep. The sweep count of the sweep-to-sweep averaging is
displayed in the upper left area of the screen.
AVERAGING on OFF For both A and B traces, toggles on and off the averaging (sweep-to-sweep
averaging) function that, based on the sweep data obtained as many times as the
specified count, executes averaging and displays the result. When the averaging
function is on, based on an exponential average of consecutive sweeps weighted
by an averaging factor specified by the user with the AVERAGING FACTOR
key, each data point (vector value) is calculated and the data is displayed. The
numeric value, displayed below "Avg" in the status indication field in the upper
left area of the screen, indicates the number of past sweeps to be used for
averaging the current trace. The number becomes effective when the current
sweep is completed. Immediately after the averaging function is turned on, there
is no past sweep data and so the count starts from 0. If you restart the averaging
with the AVERAGING RESTART key or you change instrument states that
affect measured data, the averaging sweep count is reset to 0. After that, data is
averaged over the available data at that time, and the displayed trace is updated
each time a new sweep is performed until the count reaches the averaging count
specified with the AVERAGING FACTOR key. When the count reaches the
specified averaging count, averaging is performed over the past trace data
measured as many times as the specified averaging factor, including the new
measured data, and the resulting data are displayed. Refer to Equation 5-1 on
page 126 for the algorithm of the sweep-to-sweep averaging.
AVERAGING FACTOR Sets the averaging count for the sweep-to-sweep averaging. Specify an integer
between 1 and 256.
POINT AVG on OFF For both the A and B traces, toggles on and off the averaging (point averaging)
function that executes averaging of the data of the specified count at each
measurement point and displays the result.
POINT AVG FACTOR Sets the averaging count for the point averaging. Specify an integer between 1
and 256. Refer to Equation 5-2 on page 128 for the algorithm of the point
averaging.
Table B-33 Measurement bandwidth (Bandwidth) configuration menu
Key operation: [Bw/Avg] - BAND WIDTH [ ]
[Sweep] - EDIT LIST - EDIT/ADD - more 1/3 - more 2/3 - BAND WIDTH [ ]
Softkey
1 FAST Selects 1 as the measurement bandwidth (during list sweep segment edit, sets the
| measurement bandwidth of the segment to 1). The measurement speed is fastest.
2 Selects 2 as the measurement bandwidth (during list sweep segment edit, sets the
| measurement bandwidth of the segment to 2).
376
[Bw/Avg]
Function
Function
key
GPIB command
(N/A)
AVERREST
AVER {ON|OFF}
AVERFACT <value>
PAVER {ON|OFF}
PAVERFACT <value>
GPIB command
BWFACT 1
BWFACT 2
Appendix B