A-4. 2640A/2645A Trigger In (Ti) Specification - Fluke NetDAQ 2640A User Manual

Table A-3. 2640A/2645A DIGITAL I/O Specification (cont)
Specification
Output Voltage - TTL Logical Zero
Output Voltage - TTL Logical One
Output Voltage - Non-TTL Load Zero
Output Voltage - Non-TTL Load One
Trigger In
Table A-4 provides a summary of the Trigger In specifications. The Trigger In
input is located on the ALARM/TRIGGER I/O connector, terminals TI and GND.
Table A-4. 2640A/2645A Trigger In (TI) Specification
Specification
Logical High - Trigger not set
Logical Low - Trigger set
Compatibility
Isolation
Minimum Pulse Width
Maximum Frequency
Repeatability
2640A/2645A Combined Specifications
Characteristic
0.8V maximum for an I out of -1.0 mA (1 LSTTL
load)
3.8V minimum for an I out of 0.05 mA (1 LSTTL
load)
1.8V maximum for an Iout of -20 mA
3.25V maximum for an Iout of -50 mA
Characteristic
Minimum: 2.0V
Maximum: 7.0V
Minimum: -0.6V
Maximum: +0.8V
TTL or Contact Closure
None (dc coupled)
5 µs
Nominal 400 Hz
3 ms
Specifications
A
A-7.
A-5