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Front-Panel Key Reference
BW/Avg
Key Access:
Softkey that sets the intermediate frequency bandwidth (ResBW) of
200 Hz
200 Hz. This bandwidth is used when performing electromagnetic
interference (EMI) measurements in CISPR Band A (9 kHz-150 kHz).
Key Access:
Changes the analyzer post-detection filter from 1 Hz to 3 MHz in a 1, 3,
Video BW
10 sequence using the knob, step keys, or the numeric keypad. If an
Auto Man
unavailable bandwidth is entered using the numeric keypad, the closest
available bandwidth in the 1, 3, 10 sequence is used. Video Bandwidth
settings are available from 1 Hz to 3 MHz for Resolution Bandwidth
settings less than or equal to 300 Hz and from 30 Hz to 3 MHz for
Resolution Bandwidth settings greater than or equal to 1 kHz.
As the video bandwidth is decreased, the sweep time is increased to
maintain amplitude calibration. A "#" mark appears next to VBW on
the bottom of the analyzer display when it is not coupled. To couple the
video bandwidth, press
Key Access:
Initiates a digital averaging routine that averages the trace points in a
Average
number of successive sweeps resulting in trace "smoothing". The
On Off
number of sweeps (average number) can be selected. Increasing the
average number will further smooth the trace. The type of averaging
used is selected by pressing
The average is restarted when any of the following occurs:
• a new average number is entered.
• any measurement related parameter (e.g., Center Frequency) is
•
•
When in Single Sweep, the specified number of averages is taken, then
the sweep stops. When in continuous sweep, the specified number of
averages is taken, then the averaging continues with each new sweep
averaged in with a weight of
by multiplying it by
To turn off averaging, press
only be entered using the numeric keypad, not the knob or step keys.
Key Access:
Accesses the functions to automatically or manually choose from one of
Avg Type
the following averaging scales: Video or Power (RMS).
Auto Man
74
BW/Avg
BW/Avg
BW/Avg
changed.
is pressed.
Restart
is pressed.
Single Sweep
Average Number
BW/Avg
(or press
Video BW (Auto)
BW/Avg, Avg Type
1
and the old average reduced
---------------------------------------- -
Average Number
1
–
---------------------------------------- -
Average Number
. The number of sweeps can
Average (Off)
).
Auto All
.
.
Chapter 2
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