Agilent Technologies 8753ET User Manual page 80

Making Measurements
Measuring Amplifiers
Control of the external switch can be done through the test set interface on the rear panel. Pin 8 on the TEST
SET-I/O INTERCONNECT connector is a TTL 5 volt line that changes from TTL high in the forward
measurement state to TTL low in the reverse measurement state. Refer to Figure 1-81 on page 1-111. Table
1-6 is a complete listing of the connector's pins.
Pin 1 on the external switch must be grounded. It can be grounded to:
• the analyzer's chassis
• the front panel binder post
• the outer shell of the TEST SET-I/O INTERCONNECT connector
• a ground pin on the TEST SET-I/O INTERCONNECT connector (pin 7, 12 or 18). Refer to Figure 1-81.
Pin C (common) on the HP/Agilent 8762B Option T24 must be connected to the test set interface Pin 14
(+22 volt line). Pin 2 on the 8762B Option T24 connects to Pin 8 (TTL 0) on the test set interface.
1-66