Teledyne LeCroy WaveAce - Manual (Page 35)

WaveAce Series
35 WA-GSM-E RevB
1. Choose an input coupling mode. Turn on the desired channel by
pressing the appropriate channel button - CH1 or CH2 (or CH3 or 4
on 4 channel models).
2. Now, press the Coupling option button on page 1/2 of the channel
menu, and then select a coupling mode from the menu.
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.