User Manual

Getting Started Manual
WA-GSM-E-RevA
29
Limiting Bandwidth
You can limit the bandwidth to reduce display noise. When you turn
Bandwidth Limit ON, the Bandwidth Limit value is set to 20 MHz. It also
filters the signal to reduce noise and other unwanted high frequency
components.
Note: The oscilloscope vertical response rolls off slowly above its
bandwidth; or, above 20 MHz when the Bandwidth Limit is set to ON.
Therefore, the FFT spectrum can show valid frequency information higher
than the oscilloscope bandwidth. However, the magnitude information near
or above the bandwidth will not be accurate.
To turn the Bandwidth Limit ON, turn on the
channel by pressing the appropriate channel
button (CH1 or CH2).
Press the BW Limit option button on page 1/2
of the channel menu, then select On.