Fluke CombiScope PM3370B User Manual page 161

FUNCTION REFERENCE
Key sequence:
ON
TRIG VIEW
AC/DC/GND
AC/DC
INPUT IMPEDANCE (200 MHZ MODELS ONLY)
Description:
For high-frequency measurements the input impedance can be switched from
1 M to 50 . Input impedance is automatically adapted to the type of probe.
Manual switching is done with the toggle key 50 in the VERT MENU menu.
The 50 input is not available for the EXT TRIG.
The input is protected in the 1 M as well as the 50
- 1 M : protected for signals up to 400V.
- 50 : protected for peak voltages up to 50V or up to 5V rms.
For details, refer to the Reference Manual.
Key sequence:
Toggle key to switch a channel on/off.
Toggle key to switch the display of the External Trigger
signal on/off.
Toggle key for vertical input coupling of the input
channels.
Toggle key for vertical input coupling of the External
Trigger input.
Toggle key to switch 50
..
Toggle key to switch 50
setting:
input impedance of CH1.
input impedance of CH..
5 - 41