Tektronix P7625, Quick Start User Manual

Page: 53 / 88

Basic Operation
Connecting to a Circuit Board
TriMode adapters are necessary to complete the connection between the P7600 Series probes and your circuit. The adapters are
available as optional accessories and provide several connection options. You can use coaxial adapters with SMP or 2.92 mm
connectors, or the P76TA adapter, which allows you to use P7500 Series solder tips such as the P75PST Performance Solder Tip.
All of the adapters and tips provide the signal and ground connections necessary to take full TriMode measurements with one
setup. All of the adapters secure to the probe head with a 2 mm hex screw. (See page 5,
Connect the Adapters .)
Coaxial Adapters
Three coaxial adapters are available for the probe and are described on the following pages. All of the adapters mate to the
P7600 Series probe head through a multi-pin connector that transfers the adapter information to the oscilloscope for automatic
identi
fi cation. The connector also provides a 50 ohm signal path for each of the probe inputs. The A and B inputs on the adapters
carry the circuit ground connections through the outer shield on the coaxial cables and connectors.
Precautions when connecting to the circuit.
To achieve the best performance and service life of the probe and adapters,
observe the best practices below when you make connections:
Wear the antistatic wrist strap that is supplied with the probe and work at an antistatic-approved workstation.
Use two wrenches to tighten the coaxial connectors; one to prevent the cable from twisting, and another to tighten the cable
connector to the adapter or circuit connection.
When you tighten cable connectors that are close to each other (as on the P76CA-292 adapter), be careful not to strike
adjacent connectors with the wrench.
To preserve the adapter cables and maintain the highest signal fi delity, never kink the wires or put undue stress on them.
Support the adapter/probe head by taping it to your circuit or providing a means to prevent strain on the circuit connection.
P7600 Series TriMode Probes Quick Start User Manual 39