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Chapter 9: Making Coordinated Measurements
Setting Up for Coordinated Measurements
1 Connect one end of a 50 ohm coaxial cable with male BNC connectors to the HP 64700 BNC
receptacle and the other end to the appropriate BNC receptacle on the other measuring instrument.
The BNC connector is capable of driving TTL level signals into a 50 ohm load. (A positive rising edge
is the trigger signal.) It requires a driver that can supply at least 4 mA at 2 volts when used as a receiver.
The BNC connector is configured as an open-emitter structure which allows for multiple drivers to be
connected. It can be used for cross-triggering between multiple HP 64700Bs when no other
cross-measurements are needed. The output of the BNC connector is short-circuit protected and is
protected from TTL level signals when the emulator is powered down.
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