SRS Labs SR640 Series, Руководство пользователя

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11
COMMAND LIST
The command list of the SR640 is detailed be-
low.
Commands that may be queried have a
question mark ? in parentheses (?) after the four
character command mnemonic.
Commands that
may ONLY be queried have a ? after the mnemon-
ic. Parameters shown in brackets {} should be
omitted if the command is used as a query.
Do
not send () or {} as part of the command. The vari-
able i used in many of the commands indicates
which filter channel the command will operate on.
This variable can only be 1 (for channel 1) or 2 (for
channel 2).
The variable n is an integer variable,
and must be sent as an integer, i.e. no decimal
points or exponents.
The variable x is a real
number and may be expressed in fixed or floating
point format, with or without a decimal point.
FILTER COMMANDS
ACDC(?) i{,n}
The ACDC command sets the input coupling for
channel i to AC (n=0) or DC (n=1).
FLTR (?) i{,n}
If n=1, the FLTR command puts the channel i filter
into the signal path. If n=0, the filter is bypassed.
FR EQ(?) i{,x}
The FREQ command sets the filter cutoff frequen-
cy for channel i to x. Allowed values are 1.0
≤
x
≤
99,900 (Hz).
INVT(?) i{,n}
The INVT command inverts the output signal with
respect to the input (n=1), or leaves it uninverted
(n=0).
LOCL n
The LOCL command sets the local/remote mode
of the instrument.
Allowed values are:
n mode
0 local
1 remote
2 remote with local lockout
OVLD?
The OVLD? command queries the overload status
of the instrument.
The result is returned as a
decimal number (0-15) which represents a 4 bit bi-
nary number. The binary number is coded as fol-
lows:
bit meaning
3 (msb) channel 2 output overload
2 channel 2 input overload
1 channel 1 output overload
0 (lsb) channel 1 input overload
PR EG(?) i{,n}
The PREG command sets the input gain for chan-
nel i to the value specified by n.
Allowed values
of n are:
n Input Gain
0 0 db
1 10 db
2 20 db
3 30 db
4 40 db
5 50 db
6 60 db
PSTG(?) i{,n}
The PSTG command sets the output gain for
channel i to the value specified by n.
Allowed val-
ues of n are:
n Output Gain
0 0 db
1 10 db
2 20 db
SR CE(?) i{,n}
The SRCE command selects the input source for
channel i. The permitted values for n are:
n Input Source
0 A
1 A-B
2 B
STATUS AND INTER FACE COMMANDS
*IDN?
The *IDN? command returns the SR640's identifi-
cation string. The string format is:
Stanford Research Systems,SR640,S/N0001,v
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