Tektronix 372, User Manual, Page: 338 / 364

Appendix B: Specifications
Appendices
AĆ50
TTL I/F
When the TTL I/F test is executed in the ROUTINE level, a menu with the
[INPUT] soft button and 5 [OUTPUT:X] soft buttons (X from 0 to 4) as shown
in Figure AĆ15 appears.
The [INPUT] soft button corresponds to the input line represented by the IN
BIT 0 of the TTL I/F port. By touching this soft button, status of the input line
is checked and the result is displayed right below the soft button. Give a
signal to the IN BIT 0 of the TTL I/F port and touch the [INPUT] soft button to
check for proper display of the line status.
The [OUTPUT:0], [OUTPUT:1], [OUTPUT:2], [OUTPUT:3], and [OUTPUT:4]
soft buttons correspond to the output lines represented by the OUT BIT 0 to
4 of the TTL I/F port. By touching this soft button, the readout displayed right
below the soft button changes between 0 and 1. The status of the output
line of the TTL I/F port changes accordingly. Touch each soft button and
check that a correct signal is output to the corresponding line.
By pressing the [STOP] button on the front panel, the TTL I/F menu disapĆ
pears and the Diagnostic menu is displayed again.
Figure AĆ15:ăTTL I/F Menu