SRS Labs SR510 - Manual (Page 22)

18
n Status
0 Local: all front panel keys are operative
1 Remote: front panel keys are not
operative. The display up key returns the
status to local.
2 Lock-out: front panel keys are not
operative. No key returns the status to
local. Another I command is needed to
return to local.
When using the GPIB interface, the REN, LLO,
and GTL commands are not implemented. The I
command is used by both interfaces to set the
remote-local status.
J {n1,n2,n3,n4}
The J command sets the RS232 end-of-record
characters sent by the SR510 to those specified
by the ASCII codes n1-n4. If no argument is
included, the end-of-record sequence returns to
the default (a carriage return), otherwise, up to
four characters may be specified. The end-of-
record required by the SR510 when receiving
commands is not affected.
K n
The K command simulates a front panel key
press. The effect is exactly the same as pressing
the selected key once. The parameter n is
required.
n Key
1 Post Time Constant Up
2 Post Time Constant Down
3 Pre Time Constant Up
4 Pre Time Constant Down
5 Offset Up
6 Offset Down
7 Zero Phase (Simultaneous 90¡ Up and
Down)
8 Line Notch Filter
9 Bandpass Filter
10 Line X 2 Notch Filter
11 Relative (Auto Offset)
12 Offset (On/Off)
13 Expand
14 Local (Display Up when REMOTE)
15 Reference Trigger Mode
16 Reference Mode (f/2f)
17 Degrees Up
18 Degrees Down
19 Quad Up
20 Quad Down
21 Select Display (f/phase)
22 Sensitivity Up
23 Sensitivity Down
24 Dyn Res Up
25 Dyn Res Down
26 Display Up
27 Display Down
L m {,n}
The L command sets and reads the status of the
line notch filters. If m is "1", then the 1X line
notch is selected, if m is "2", the 2X line notch is
selected. The parameter m is required. If n is "1",
the L command sets the selected filter in. If n is
"0", the selected filter is taken out. If n is absent,
the status of the selected filter is returned.
M {n}
If n is "1", the M command sets the reference
mode to 2f. If n is "0", the reference mode is set
to f. If n is absent, the reference mode is returned.
N {m}
If m is "1", the N command sets the ENBW to 10
Hz. If m is "0", the ENBW is set to 1 Hz. If m is
absent, the ENBW setting is returned.
O {n} {,v}
If n is "1", the O command turns the offset on. If n
is "0", the offset is turned off. If n is absent, the
offset status (on or off) is returned. (The value of
the offset is read using the S and Q commands.)
If n is included, then v may also be sent. v is the
offset value up to plus or minus full scale in units
of volts. For example, to offset half of full scale on
the 100
µ
V sensitivity, v should be "50.0E-6" or an
equivalent value. However, if the sensitivity is
then changed to 200
µ
V, the offset is now half of
the new full scale or 100
µ
V. When the sensitivity
is changed, the offset is retained as a constant
fraction of full scale rather than as a voltage
referred to the input. The expand function will, on
the other hand, preserve the value of the offset as
an input referred voltage. Once a value of v is
sent, the offset may be turned off and on without
losing the offset value by using the O command
without the v parameter. Note that if the auto
offset is on, an "O 1" command will turn the auto
offset off and turn the manual offset on without
changing the actual offset value.
P {v}
If v is absent, the P command returns the phase
setting from -180 to +180 degrees. When v is
included, the phase is set to the value of v up to
±999 degrees.