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).
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