LeCroy 9300C Series, Operator'S Manual

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5 –3
Coupling
Coupling Menus
Press for access to selection of:
Ø
Coupling and grounding of each input channel
Ø
ECL or TTL gain, offset and coupling preset for the
channel shown
Ø
Bandwidth limiter for all channels
Ø
Probe attenuation of each input channel.
Coupling
Used to select the input channel’s coupling. If an overload is
detected, the instrument will automatically set the channel to the
grounded state: the menu can then be reset to the desired coupling.
V/div Offset
When NORMAL is highlighted, pressing the corresponding menu
button sets the offset, Volts/div, and input coupling to display ECL
signals. Press the button a second time and the settings for TTL
signals are given. And a third time returns the settings to those used
at the last manual setup of the channel.
Global BWL
To turn the bandwidth limit “ OFF ” or “ ON ”. The bandwidth can be
reduced from 500 MHz or 1 GHz, to either 200 MHz or 25 MHz, or
30 MHz (–3dB), depending on the model (
see Appendix A).
Bandwidth limiting can be useful in reducing signal and system
noise or preventing high-frequency aliasing, reducing — for
example — any high-frequency signals that may cause aliasing in
single-shot applications.
Note:
This command is global and affects all input channels.
Probe Atten
Sets the probe attenuation factor related to the input channel ( see
following for probe details ).