To Specify The Threshold Voltage - HP 64767 User Manual

To specify the threshold voltage

1 Enter the modify configuration command.
2 Answer "yes" to the "Modify external analyzer configuration?" question.
3 Answer "yes" to the "Should emulation control the external bits?" question.
4 Answer the "Threshold voltage for bits 0-7 and J clock?" question.
5 Answer the "Threshold voltage for bits 8-15 and K clock?" question.
The external analyzer probe signals are divided into two groups: the lower byte
(channels 0 through 7 and the J clock), and the upper byte (channels 8 through 15
and the K clock). You can specify a threshold voltage for each of these groups.
The default threshold voltages are specified as TTL which translates to 1.40 volts.
Voltages may be in the range from -6.40 volts to 6.35 volts (with a 0.05V
resolution). You may also specify CMOS (which translates to 2.5 volts), or ECL
(which translates to -1.3 volts).
Chapter 9: Using the External State Analyzer
Configuring the External Analyzer
275