Ametek 7280 Instruction Manual page 211

amplitude) commands.
SYNC [n] Synchronous time constant control
n Effect
0 Synchronous time constant disabled
1 Synchronous time constant enabled
TADC [n] Auxiliary ADC trigger mode control
The value of n sets the trigger mode of two of the auxiliary ADC inputs according to
the following table:
n Trigger mode
0 Asynchronous (5 ms intervals)
1 External ADC1 and ADC 2 (rear panel TRIG input)
2 Burst mode, 25 µs/point, triggered by command (ADC1 only)
3 Burst mode, 56 µs/point, triggered by command (ADC1 and ADC2)
4 Burst mode, variable rate, triggered by command (ADC1 only)
5 Burst mode, variable rate, triggered by command (ADC1 and ADC2)
6 Burst mode, 25 µs/point, External trigger with < 1.25 ms trigger indeterminacy
(rear panel TRIG input) (ADC1 only)
7 Burst mode, 56 µs/point, External trigger < 1.25 ms trigger indeterminacy (rear
panel TRIG input) (ADC1 and ADC2)
8 Burst mode, variable rate, External trigger < 1.25 ms trigger indeterminacy (rear
panel TRIG input) (ADC1 only)
9 Burst mode, variable rate, External trigger < 1.25 ms trigger indeterminacy (rear
panel TRIG input) (ADC1 and ADC2)
10 Burst mode, 25 µs/point, External trigger with < 25 µs trigger indeterminacy
(rear panel TRIG input) (ADC1 only)
11 Burst mode, 56 µs/point, External trigger with < 25 µs trigger indeterminacy(rear
panel TRIG input) (ADC1 and ADC2)
12 Burst mode, variable rate, External trigger with < 25 µs trigger
indeterminacy(rear panel TRIG input) (ADC1 only)
13 Burst mode, variable rate, External trigger with < 25 µs trigger
indeterminacy(rear panel TRIG input) (ADC1 and ADC2)
In the burst modes, data is stored in the curve buffer. Use the LEN command to set
the number of points required. Note that it may be necessary to enter CBD 256 before
setting the length, if the curve buffer has previously been used for more than one data
type. The data is read out from the buffer using DC[.] 8 for ADC1 and DC[.] 9 for
ADC2. If the length is set to more than 16384 and a burst mode which stores both
ADC1 and ADC2 is specified then the curve length will automatically be reduced to
16384 points. Note also that setting the TADC parameter to any value other than 0 or
1 affects the CBD parameter, as follows:
TADC parameter
0
1
2
3
4
5
Appendix F, ALPHABETICAL LISTING OF COMMANDS
Effect on CBD parameter
none
none
automatically set to 256
automatically set to 768
automatically set to 256
automatically set to 768
F-19