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Operating and Maintenance Instructions – 16
Table 6: Status LEDs
LED Description
REM Indicates that the GPIB or RS232 interface is in Remote mode. All front-panel
keys except Local are locked out.
LOCK Indicates that the SB switch is in Local Lockout mode. This mode prevents the
Local key from returning the SB switch to Local mode.
ADDR Indicates that the GPIB interface is in talk or listen state
SRQ Indicates that the interrupt logic of the SB switch has generated a service request
interrupt on the GPIB interface
Rear Panel
The back of the switch is shown in Figure 8.
Figure 8: Back of the Switch
External Switch Module Connections
External Switch Module without TTL Input Controls
The setup for a switch without transistor-to-transistor logic (TTL) is shown in Figure 9.