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Chapter 4: Connecting the Emulator to a Target System
Plugging The Emulator Into A Target System
Verifying Operation Of The Emulator In Your
Target System
When connecting an emulator into a new target system, the step-by-step approach
described in the remainder of this chapter will help you get your system running
most quickly. This is a logical procedure that starts out with the most simple
requirements and moves toward compete functionality, allowing for verification of
installation at each step in the process. This not only helps debug problems if they
arise, but builds confidence that the emulator is functioning correctly in your target
system.
To begin, run the performance verification procedure described on page 103.
This procedure uses the built-in terminal interface. Once your target system is
operating with the emulator, you should begin using one of the graphical user
interfaces.
Additional equipment
Some additional equipment may be required to make measurements of MC6833x
signals. It will help to have an oscilloscope and high speed timing analyzer to use
during these procedures. A 250-MHz timing analyzer may be fast enough, but if
you can obtain a faster timing analyzer, faster is better. The oscilloscope should
have a single-shot bandwidth greater than 500 MHz. You may also need to cross
trigger these instruments from the emulator. If there are no trigger inputs to the
timing analyzer, you can probably use a timing channel. The BNC trigger output
of the HP 64700 emulation card cage provides a rising edge TTL signal.
Probing
When making measurements, remember that signals need to be probed at the right
place for the measurement being made. The emulator specifications are referenced
to the target socket connector on the probe. This is where measurements should be
made to verify compliance with the specifications. When probing setup and hold
times to circuits in the target system, make the appropriate measurements at the
circuits. This will keep connection accessories from impacting the true
measurements. Always use ground leads to get the most accurate measurements
possible. The wide trace that runs along the perimeter of the emulator probe
(around the target connector) is a good ground that is easy to connect to when
probing the target connector.
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