Ametek 7280 Instruction Manual page 97

The Auxiliary I/O menu has five controls, which are used to set the voltages
appearing at the DAC1 and DAC2 connectors on the rear panel and configure the
auxiliary ADC trigger mode, four displays to show the voltages at the rear-panel
ADC1 to ADC4 inputs and a key access a further sub-menu.
The five controls operate as follows:
AUX DAC 1 and AUX DAC 2
These two controls set the voltages appearing at the DAC1 and DAC2 connectors on
the rear panel to any value between -10.000 V and +10.000 V in 1 mV increments.
Adjustment is faster using the Keypad or Active Cursor controls - see section 4.1.04.
ADC TRIGGER MODE
This has eleven possible settings, as follows:-
5ms (200Hz)
A conversion is performed on ADC1, ADC2, ADC3 and ADC4 every 5 ms, with
the results being displayed on the right of the screen and being available via the
computer interfaces.
EXTERNAL (Rear Panel)
A conversion is performed on ADC1, ADC2, ADC3 and ADC4 on receipt of a
rising edge at the TTL TRIG connector on the rear panel. The maximum trigger
rate is 200 Hz. The results are displayed on the right of the screen and are
available via the computer interfaces.
BURST ADC1
A burst of conversions at 40 kHz (25 µs/point) is performed on ADC1 only,
either on receipt of the TADC2 computer command or when the Trigger Burst
Mode key is pressed. The results are stored to the curve buffer, with the number
of conversions being set by the curve length control on the Curve Buffer menu -
see section 5.3.22.
Chapter 5, FRONT PANEL OPERATION
Figure 5-32, Auxiliary I/O Menu
5-51