EasyManuals Logo

Agilent Technologies 8720ES User Manual

Agilent Technologies 8720ES
479 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #124 background imageLoading...
Page #124 background image
1-110
Making Measurements
Using Test Sequencing
TTL Input Decision Making Five TTL compatible input lines can be used for decision making in test
sequencing. For example, if a test fixture is connected to the parallel port and has a micro switch that needs
to be activated in order to proceed with a measurement, you can construct your test sequence so that it
checks the TTL state of the input line corresponding to the switch. Depending on whether the line is high or
low, you can jump to another sequence. To access these decision making functions, press
. Refer to Figure 1-80 for input bus pin locations.
lets you select the single bit (0 4) that the sequence will be looking
for.
lets you jump to another sequence if the single input bit you selected is in a
high state.
lets you jump to another sequence if the single input bit you selected is in a
low state.
Pin assignments:
pin 1 is the data strobe
pin 16 selects the printer
pin 17 resets the printer
pins 18-25 are ground
Electrical specifications for TTL high:
•volts(H) 2.7 volts (V)
current = 20 microamps (A)
Electrical specifications for TTL low:
•volts(L) 0.4 volts (V)
current = 0.2 milliamps (mA)
Figure 1-80 Parallel Port Input and Output Bus Pin Locations in GPIO Mode
Seq
TTL I/O
PARALL IN BIT NUMBER
PARALL IN IF BIT H
PARALL IN IF BIT L

Table of Contents

Other manuals for Agilent Technologies 8720ES

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Agilent Technologies 8720ES and is the answer not in the manual?

Agilent Technologies 8720ES Specifications

General IconGeneral
BrandAgilent Technologies
Model8720ES
CategoryMeasuring Instruments
LanguageEnglish

Related product manuals