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Appendix F, ALPHABETICAL LISTING OF COMMANDS
RSADDR [n]
RT[.]
SEN [n]
SEN.
SLOPE [n]
F-20
Set/read RS232 address
The value of n sets the RS232 address in the range 0 to 15. This is relevant only
when using more than one instrument connected via the RS232 "daisy-chain"
method. Each instrument must be set to a unique address.
Ratio output
In integer mode the RT command reports a number equivalent to 1000×X/ADC1
where X is the value that would be returned by the X command and ADC1 is the
value that would be returned by the ADC1 command.
In floating point mode the RT. command reports a number equivalent to X/ADC1.
Full-scale sensitivity control
The value of n sets the full-scale sensitivity according to the following table,
depending on the setting of the IMODE control:
n
full-scale sensitivity
IMODE=0
3
10 nV
4
20 nV
5
50 nV
6
100 nV
7
200 nV
8
500 nV
9
1 µV
10
2 µV
11
5 µV
12
10 µV
13
20 µV
14
50 µV
15
100 µV
16
200 µV
17
500 µV
18
1 mV
19
2 mV
20
5 mV
21
10 mV
22
20 mV
23
50 mV
24
100 mV
25
200 mV
26
500 mV
27
1 V
Floating point mode can only be used for reading the sensitivity, which is reported in
volts or amps. For example, if IMODE = 0 and the sensitivity is 1 mV the command
SEN would report 18 and the command SEN. would report +1.0E-03. If IMODE was
changed to 1, SEN would still report 18 but SEN. would report +1.0E-09
Output low-pass filter slope (roll-off) control
When the fast analog output mode and Noise Measurement mode are turned off
(FASTMODE 0 and NOISEMODE 0), the selection is according to the following
IMODE=1
IMODE=2
10 fA
n/a
20 fA
n/a
50 fA
n/a
100 fA
n/a
200 fA
n/a
500 fA
n/a
1 pA
10 fA
2 pA
20 fA
5 pA
50 fA
10 pA
100 fA
20 pA
200 fA
50 pA
500 fA
100 pA
1 pA
200 pA
2 pA
500 pA
5 pA
1 nA
10 pA
2 nA
20 pA
5 nA
50 pA
10 nA
100 pA
20 nA
200 pA
50 nA
500 pA
100 nA
1 nA
200 nA
2 nA
500 nA
5 nA
1 µA
10 nA
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