Fluke 5520A Operator's Manual page 307

8-36. The MORE OPTIONS Menu
When you select MORE OPTIONS, you open options that give you more control over
the frequency and voltage. To access the MORE OPTIONS menu, press the softkey
under MORE OPTIONS in the LEVSINE menu.
FREQ CHG
jump
f
jump
sweep
Each option in the MORE OPTIONS menu is described below:
•
FREQ CHG Toggles between two settings that control the way the output signal
adjusts to a new frequency. "Jump" is the default setting.
"Jump" causes the output signal to jump immediately to a new frequency setting.
"Sweep" causes the signal to sweep through a series of frequency values, over a
range you set. Use the sweep function to watch the signal gradually change over a
given bandwidth and see the point at which its amplitude changes. Details for using
the sweep function are provided under "Sweeping Through a Frequency Range."
•
RATE Used when FREQ CHANGE is set to "sweep" to select a sweep speed of
100 kHz, 1 MHz, or 10 MHz.
A slower sweep rate lets you watch the frequency change very slowly. After a faster
sweep, you may want to pinpoint a certain frequency with a slower sweep over a
subset of your previous frequency range.
•
RANGE The softkeys toggle between two settings. The first setting ("auto")
changes the range limit automatically in accordance with the voltage level. The
second setting ("locked") freezes the present range limit; subsequent changes in
voltage level are then measured with this range limit.
There are six range limits in LEVSINE mode: 10 mV, 40 mV, 100 mV, 400 mV, 1.3
V, and 5.5 V. When set to "auto" the calibrator uses your voltage setting to
automatically set the range limit that provides the most accurate output.
When set to "locked" the range limit remains fixed and you can decrease the voltage
down to the bottom of the range.
For example, assume the range limit is 40 mV. If you enter 5 mV with "auto"
selected, the calibrator will automatically change the range limit to 10 mV and
output 5 mV from within the 10 mV range. However, if you start with the 40 mV
range "locked" and then enter 5 mV, the calibrator will output 5 mV from within the
40 mV range.
Calibrating the Pulse and Frequency Response on an Oscilloscope
RATE Range
1 MHz auto
f f
1 MHz |------------|
10 MHz auto
100 kHz locked
10 mV
40 mV
100 mV
400 mV
1.3 V
5.5 V
5520A-SC600 Option
= 40 mV MODE
levsine
f f
volt
edge
levsine
marker
wavegen
video
pulse
meas Z
overld
8
8-23