PA-863 Rev. A / 8-02
8101-4TRX 4-Pin Transistor Test Fixture
User’s Guide
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
(440) 248-0400
Fax: (440) 248-6168
www.keithley.com
Overview
WARNING
The procedures contained in this User’s Guide are intended for use by qualified service
personnel only. Do not perform these procedures unless qualified to do so. Failure to rec-
ognize and observe normal safety precautions could result in personal injury or death.
The 8101-4TRX test fixture is a metal case with four female triaxial connectors (SMU1–4) and a latch on the outside
(see
Figure 1
). Inside the test fixture is one 4-pin device holder (transistor socket). The inner conductor of each triax connector
is wired to the closest pin on the 4-pin device holder (see Specifications at the end of this document). The inner shield of the
triax connectors are “no connects.” The triax connectors’ outer shield is connected to the test fixture’s metal case.
Figure 1
Test fixture
SMU1
SMU2
SMU4
Lid
SMU3
Latch
Transistor socket
