O Set; Overload - Stanford Research Systems SIM983 Operation And Service Manual

1 – 4
resetting gain
1.2.3 Offset
resetting o set

1.2.4 Overload

If one of [gain ] is pressed and held, the gain is continuously ad-
justed. The rate of the adjustment increases as the button is held. If
the absolute value of the gain is being lowered, the rate of the adjust-
ment changes as G crosses 1.00, and possibly again as G crosses 0.10.
If both [gain ] and [gain ] buttons are pressed at the same time, the
absolute value of the gain is reset to 1.00. This action does not change
the polarity.
Pressing one of [gain ] and [polarity] at the same time has a special
meaning. This press initiates autocalibration (Section 2.2).
The input-referred voltage o set V
between 10 00 V and
the second line of displays on the front panel of the amplifier.
To increase or decrease the o set, press the button [o set ]
or the button [o set ]. Unlike the gain, the "up" and "down"
buttons adjust the o set, not its absolute value.
example, pressing [o set
V 5 48 V If [o set ] is pressed when V
ofs
press has no e ect. If [o set ] is pressed when V
press has no e ect.
Between the values 2 00 V
with 0 001 V resolution; the position of the decimal point on the front-
panel displays is shifted to the left. Although the resolution is 0.01 V
for V 2 00 V the accuracy of the o set is still 1 mV
ofs
Thus, for example, setting V
0 001 0 001) ( 5 480
If one of [o set ] is pressed and held, the o set is continuously
adjusted. The rate of the adjustment increases as the button is held.
If the value crosses the threshold V
appropriately.
If both [o set ] and [o set ] buttons are pressed at the same time, the
o set is reset to 0.000 V.
There are two overload indicators, one OVLD LED in the IN-
PUT block and one OVLD LED in the OUTPUT block of the front
panel. The overload signal can also be asserted on the STATUS pin.
See Section 3.5.
can be set to a value
ofs
10 00 V Its value, in volts, is shown on
] when V
ofs
V 2 00 V the o set is selected
ofs
5 48 V produces V
ofs
0 002) V
2 00 V the rate changes
ofs
SIM983 Scaling Amplifier
Getting Started
Thus, for
5 49 V makes
10 00 V the
ofs
10 00 V the
ofs
0 02%
( 5 480
ofs