Sequoia / Tahoe Series User Manual California Instruments
M447352-01 REV-A 57
Connector Type
Leader High-density, 37-socket, receptacle (female) Subminiature-D.
Follower High-density, 37-socket, receptacle (female) Subminiature-D.
Table 3-12. External Leader/Follower System Interface Connector Type
Function Characteristics
Leader Interface
Control signal interface on Leader unit (or other Follower units if more
than two units comprise the multi-phase / parallel-group) going to
Follower unit for multi-chassis parallel operation;
Follower Interface
Control signal interface on Follower unit coming from Leader unit (or
other Follower units if more than two units comprise the multi-phase /
parallel-group) for multi-chassis parallel operation;
Table 3-13. External Leader/Follower System Interface Characteristics
3.8.2 BNC Connectors
The functions of each BNC connector is called out on the rear panel decal. Table 3-14 shows the
connections from left to right when standing at the rear of the Sequoia/Tahoe cabinet.
BNC Description
1 Trigger Output (TTL output) ; Refer to Table 3-15
2 Trigger IN (TTL input) ; Refer to Table 3-15
3 Clock (TTL output on Leader / TTL input on Auxiliary); Refer to Table 3-15
4 Lock (TTL output on Leader / TTL input on Auxiliary); Refer to Table 3-15
Table 3-14: BNC Connectors
Trigger Output
Signal output with dual function: user selectable as either function trigger or list
trigger;
function trigger provides a pulse for any programmable change in output voltage
or frequency; list trigger provides a pulse if programmed as part of list transients;
pulse logic level, user-selectable as active-high or active-low; pulse duration, 400
µs;
rear panel BNC connector; safety isolation SELV-rated, referenced to chassis.
Trigger Input
Signal input for external trigger for execution of programmed value;
logic level, TTL-compatible;
Signal return common to signals, Trigger input, Synchronization Clock and
Remote Inhibit;
safety isolation SELV-rated.
LKM (Option)
Signal outputs for Leader Clock and Logic signals used in synchronizing two or
more AC sources;
logic level, TTL-compatible;
rear panel BNC connectors for each signal;
safety isolation SELV-rated, referenced to chassis.
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