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NOISEMODE
= 0
5
500 µs
6
1 ms
7
2 ms
8
5 ms
9
10 ms
10
20 ms
11
50 ms
12
100 ms
13
200 ms
14
500 ms
15
1 s
N/A means that n is an illegal value under these conditions.
The TC. command is only used for reading the time constant, and reports the current
setting in seconds. Hence if a TC 12 command were sent and the noise measurement
mode was turned off, TC would report 12 and TC. would report 1.0E-01, i.e. 0.1 s or
100 ms.
TD
Take data
Initiates data acquisition. Acquisition starts at the current position in the curve buffer
and continues at the rate set by the STR command until the buffer is full. If an
oscillator frequency and/or amplitude sweep has been defined and linked to the curve
buffer using the SWEEP command with a parameter of 9, 10 or 100, then this sweep
will be started as well.
TDC n
Take data continuously
Initiates data acquisition. Acquisition starts at the current position in the curve buffer
and continues at the rate set by the STR command until halted by an HC command or
on receipt of a trigger at the TRIG in connector, in accordance with the following
table:
n
Start condition
0
On command
1
On command
2
On command
Note also that if sent without a parameter the command functions as if TDT 0 had
been sent.
The buffer is circular in the sense that when it has been filled, new data overwrites
earlier points.
TDT n
Take data triggered
Sets the instrument so that data acquisition is initiated on receipt of various trigger
conditions at the TRIG connector on the rear panel. If an oscillator frequency and/or
amplitude sweep has been defined and linked to the curve buffer using the SWEEP
command with a parameter of 9, 10 or 10, then this sweep will be started as well.
There are two basic triggers. The Acquisition trigger is a "per curve" (start) or "per
point" (sample) trigger and can be active on either the rising or falling edge. The
Stop trigger sets the condition by which acquisition finishes. In normal operation this
Appendix F, ALPHABETICAL LISTING OF COMMANDS
NOISEMODE
= 1
500 µs
21
1 ms
22
2 ms
23
5 ms
24
10 ms
25
N/A
26
N/A
27
N/A
28
N/A
29
N/A
30
N/A
Stop condition
On HC command
Ext rising edge
Ext falling edge
NOISEMODE
NOISEMODE
= 0
= 1
100 s
N/A
200 s
N/A
500 s
N/A
1 ks
N/A
2 ks
N/A
5 ks
N/A
10 ks
N/A
20 ks
N/A
50 ks
N/A
100 ks
N/A
F-23
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