Input And Filters Menu; Input And Filters; Line Notch Filters - Stanford Research Systems SR850 User Manual

Input and Filters

Source
A A-B
I
Current Gain
1M 100M
Grounding
Float Ground
Coupling
AC DC
Line Notches
Out Line
Both 2xLine
Source
Current Gain

INPUT AND FILTERS MENU

The Input and Filters menu sets the input signal source and configura-
tion. The input notch filters are also selected in this menu. See the
SR850 Basics section for a discussion of the different input configura-
tions and the signal filters.
INPUT
FILTERS
The Input Source key selects the front end signal input configuration. The
input amplifier can be either a single-ended (A) or differential (A-B) volt-
age or a current (I).
The voltage inputs have a 10 M , 25 pF input impedance. Their connec-
tor shields are isolated from the chassis by either 10
10 k (Float). Do not apply more than 50 V to either input. The shields
should never exceed 1 V.
The current input uses the A connector. The input is 1 k
ground. The largest allowable DC current before overload is 10 µA (1 M
gain) or 100 nA (100 M gain). No current larger than 10 mA should ever
be applied to this input.
This key selects the current gain when using the current input as the
signal source. This menu box is only available if the current input is
selected above.
5-7
Source
A A-B I
Current Gain
Grounding
Coupling

Line Notch Filters

(Ground) or
to a virtual