Appendix E, ALPHABETICAL LISTING OF COMMANDS
E-9
Bit Decimal value Output and range
0 1 X Output (±10000 FS)
1 2 Y Output (±10000 FS)
2 4 Magnitude Output (0 to +10000 FS)
3 8 Phase (±18000 = ±180°)
4 16 Sensitivity setting (1 to 27) + IMODE (0, 1, 2, 3 =
0, 32, 64, 128)
5 32 Noise (0 to +10000 FS)
6 64 Ratio (±10000 FS)
7 128 Log ratio (-3000 to +2000)
8 256 ADC1 (±10000 = ±10.0 V)
9 512 ADC2 (±10000 = ±10.0 V)
10 1024 ADC3 (±10000 = ±10.0 V)
11 2048 ADC4 (±10000 = ±10.0 V)
12 4096 DAC1 (±10000 = ±10.0 V)
13 8192 DAC2 (±10000 = ±10.0 V)
14 16384 EVENT variable (0 to 32767)
15 32768 Reference frequency (millihertz)
Dual modes only:-
Bit Decimal value Output and range
17 131072 X
2
Output (±10000 FS)
18 262144 Y
2
Output (±10000 FS)
19 524288 Magnitude2 Output (0 to +10000 FS)
20 1048576 Phase
2
Output (±18000 = ±180°)
21 2097152 Sensitivity
2
setting (1 to 27) + IMODE
(0, 1, 2 = 0, 32, 64)
The values of the selected curves at the same sample point are transferred as a group
in the order of the above table, separated by the chosen delimiter character and
terminated with the selected terminator. This continues until all the points have been
transferred.
NOTE: When transferring the Frequency curve, which is saved when bit 15 in the
CBD parameter is asserted, the instrument automatically reads the data for each
stored point in both frequency curves (i.e. the lower and upper 16 bits) and sends it
as a single data point.
DD [n] Define delimiter control
The value of n, which can be set to 13 or from 32 to 125, determines the ASCII value
of the character sent by the lock-in amplifier to separate two numeric values in a
two-value response, such as that generated by the MP (magnitude and phase)
command.
DEFEQU [n
1
n
2
n
3
n
4
n
5
n
6
] Define user equation
The DEFEQU command is used to define the user equations, which take the
following form:
Equation =
(A B) C
D
Parameter n
1
is used to specify the equation to be modified, and is either 1 for
Equation 1 or 2 for Equation 2.
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