Probe Field; Coupling Field; Preset Field - HP 1660CS-Series User Manual

The Scope Channel Menu

Probe field

Probe field
You use the Probe field to set the probe attenuation factor for the input
channel currently displayed in the Input field.
Probe attenuation factor
The probe attenuation factor can be set from 1:1 to 1000:1 in increments of
one. When you select a probe attenuation factor, the actual sensitivity at the
input does not change. The voltage values shown on the display (V/div,
offset, trigger level) are automatically adjusted to reflect the attenuation
factor. The marker and automatic measurement voltage values change when
a Run is initiated and the next acquisition is displayed.

Coupling field

You use the Coupling field to set the input impedance for the channel
currently displayed in the Input field.
Coupling field selections
When you select the Coupling field, a pop-up appears that shows the input
impedance values available. The selectable values are 1MΩ / DC, 1MΩ / AC,
and 50Ω / DC.
The maximum input voltage for the 50Ω / DC Coupling field selection is
C A U T I O N
5 Vrms.

Preset field

When you select the Preset field, a pop-up appears, offerring choices of TTL,
ECL, and User. The Preset field automatically sets offset, V/div, and trigger
level values to properly display TTL and ECL logic levels. Trigger level is in
the Trigger menu and can be changed only when edge trigger is the selected
trigger mode.
7-75