Stanford Research Systems SIM918, Руководство по эксплуатации и обслуживанию, Страница: 44 / 68

3 – 12 Remote Operation
Power Line Cycle Frequency FPLC(?) { j }
Set (query) the power-line rejection frequency
{
to j
=
( 50 , 60 )
}
, in Hz.
The FPLC value is retained in non-volatile memory, and is not mod-
ified by a power-on reset.
FPLC 60
Example:
Gain
GAIN(?)
{
m
}
Set (query) the preamplifier gain { to m } .
Value Gain, V
/
A
0
2
.
0 × 10
4
1 1
.
000 × 10
6
2
1
.
000 × 10
7
3
1
.
00 × 10
8
A special case m
=
0
connects the input terminal to the output of the
transimpedance stage through R
F
=
20 k
Ω
. This state is indicated
by all GAIN LEDs switched o
ff
. With BIAS GND , the configuration
reproduces the input o
ff
set voltage at the output of the instrument.
This voltage may be measured with READ?
3
.
The configuration m
=
0 is volatile, and is reset to m
=
1 upon
power-on.
GAIN?
Example:
2
Input INPT(?) { z }
Set (query) the preamplifier input connection { to z
=
(
OPEN 0
,
CLOSE 1 )
}
.
INPT CLOSE
Example:
Bias BIAS(?) { z }
Set (query) the preamplifier bias connection
{
to z
=
( GND 0 , ON 1 )
}
.
BIAS?
Example:
ON
SIM918 Precision Current Preamplifier