User`s guide

1-68
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 1-112. 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.