Noise Frequency
Bandwidth
Noise frequeney bandwidth sereen (figure 4-81) sets the start and stop frequencies (0
Hz to 10 MHz). Theeomb bandwidth stop frequency must
he
greaterthan 111%
of
the
eomb bandwidth start frequeney,
or
a 0.9:1 start to stop frequeney ratio.
'.A..IIVIL>
FREQUENCY BAND
start:
0..000
Hz
stop: 1.000 MHz
exit done
0
Figure 4-81. Noise Frequency Band
Press F8 "next,"
ta
advance to Signal Definition. Or, press F4, "exit,"
ta
return to the
Standard Waveform.
Signal Definition
Signal Definition (figure 4-82) selects the wavefonn (signal) and programs the
wavefonn frequency.
SIGNAL DEFINITION
• name: sine
o freq: 500. kHz
o exit
nextO
Figure 4-82. Signal
Definition
Select
the waveform (standard
or
arbitrary) by pressing
F2,
rotating
the
knob,
or
pressing the cursor keys. Sin(x)/x, Pulse, Pulse Train, and
aU
noise wavefonns cannot
be
used as waveforms.
Program the waveform frequency by pressing F3. Then use the knob
or
keypad to
program the frequeney between 10 mHz and 10 MHz.
Press F8 "next"
ta
advance to SignallNoise Ratio screen. Or, press F4, "exit," to return
to the Standard Wavefonn.
Signal
Plus
Noise
Ratio
Signal plus noise ratio (figure 4-83) allows you
ta
set the ratio
of
the signal to noise
as
percentage
of
volts peak
ta
peak. Either the noise
or
signal pereentage can be set, but
changing one will affect the other. The sum
of
the signal and noise percentage adds up
to 100%.
NOISE/SIGNAL RATIO
• signal 90 %Vpp
o noise 10 %Vpp
o exit next 0
Figure 4-83. Noise/Signal Ratio
Press F2, "signal," to change the peak
ta
peak
value (programmable between 1% and
99%)
of
the signal using the knob
or
keypad. Increasing the value decreases the noise
value and via versa.
4-58 Front Panel Operation Reference
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