Stanford Research Systems SR844, User Manual

Page: 105 / 246

Index of Commands 4-3
SR844 RF Lock-In Amplifier
Display and Output
DDEF(?)ch{,q}
4-15 Set (Query) the CH1 (
ch=1
) display to X (
q=0
), R[V] (
1
), R[dBm] (
2
),
Xn (
3
), AuxIn1 (
4
) or CH2 (
ch=2
) to Y (
q=0
),
θ (
1
)
, Yn[V] (
2
),
Yn[dBm] (
3
), AuxIn2 (
4
).
DRAT(?){i}
4-15
Set (Query) the Ratio Mode to Off (
0
),
÷
AuxIn1 (
1
),
÷
AuxIn2 (
2
).
FPOP(?)ch{,i}
4-15 Set (Query) the CH1/CH2 analog output to Display (
0
) or X/Y (
1
).
DOFF(?)
ch,q{,x}
4-15 Set (Query) the CH1/CH2 Offset for X, R[V], R[dBm] or Y to
x
% full
scale.
AOFF ch,q
4-20 Auto Offset CH1/CH2 for X, R[V], R[dBm] or Y.
DEXP(?)
ch,q{,i}
4-16 Set (Query) the Expand for X, R[V], R[dBm], Xn, Y,
θ
, Yn [V] to
×
1 (
i=0
),
×
10 (
1
),
×
100 (
2
).
Aux Input and Output
AUXI? i
4-17 Query the value of Aux Input
i
(
1
or
2
).
AUXO(?)i{,x}
4-17 Set (Query) the value of Aux Output
i
(
1
or
2
) to
x
Volts.
Setup
OUTX(?){i}
4-18 Set (Query) the Output Interface to RS-232 (
0
) or GPIB (
1
).
OVRM(?){i}
4-18 Set (Query) the GPIB Override Remote mode to Off (
0
) or On (
1
).
KCLK(?){i}
4-18 Set (Query) the Keyclick to Off (
0
) or On (
1
).
ALRM(?){i}
4-18 Set (Query) the Alarms to Off (
0
) or On (
1
).
SSET i
4-18 Save current settings to Buffer
i
(
1
–
9
).
RSET i
4-18 Recall settings from Buffer
i
(
1
–
9
).
KNOB i
4-18 Execute
i
knob adjustments.
KEYP i
4-18 Press key
i
.
Auto Functions
AWRS
4-20 Automatically set Wideband Reserve Mode.
ACRS
4-20 Automatically set Close-In Reserve Mode
AGAN
4-20 Perform AutoGain to set the Sensitivity.
APHS
4-20 Perform AutoPhase to get X=maximum positive and Y=0.
AOFF ch,q
4-20 AutoOffset X, R[V], R[dBm] only.
Scan and Rel
SSTR(?){f}
4-21 Set (Query) the Scan Start Frequency to
f
Hz.
SFIN(?){f}
4-21 Set (Query) the Scan Stop Frequency to
f
Hz.
SSTP(?){i}
4-21 Set (Query) the Scan Number of Points to
2
≤
i
≤
11
.
SMOD(?){i}
4-21 Set (Query) the current Scan Point (
1
≤
i
≤
N
) or Off (
0
).
RSTO i
4-21 Store XY (
1
), or R[dBm]
θ
(
2
) Rel Values.
RRDY? i
4-21 Query Rels Ready XY (
1
) or R[dBm]
θ
(
2
) returns
0
(no) or
1
(yes).
RCLR
4-21 Clear all stored Rel Values and Configurations.
RMOD(?){i}
4-21 Query Rel/Lock on (
1
) or off (
0
).