Ametek 7230 Instruction Manual page 161

SYNC [n] Synchronous time constant control
n Effect
0 Synchronous time constant disabled
1 Synchronous time constant enabled
TADC [n] Auxiliary analog-to-digital input trigger mode
The value of n sets the trigger modes for the auxiliary ADC inputs according to the
following table:
n Trigger Mode
0 Internal (1 kHz)
1 External - apply trigger to ADC TRIG IN connector
2 Burst ADC1 (5 µs per point, only ADC1 is converted)
3 Burst ADC1 & ADC2
TC [n]
TC. Filter time constant control
The value of n sets the output filter time constant in accordance with the following
table:
NOISEMODE
= 0
n time constant
0 10 µs
1 20 µs
2 50 µs
3 100 µs
4 200 µs
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
Appendix E, ALPHABETICAL LISTING OF COMMANDS
NOISEMODE
= 1
time constant n
N/A 16
N/A 17
N/A 18
N/A 19
N/A 20
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
NOISEMODE NOISEMODE
= 0 = 1
time constant time constant
2 s N/A
5 s N/A
10 s N/A
20 s N/A
50 s N/A
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
E-23