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2-6 Connections Model 2520 User’s Manual
Triax DETECTOR connectors
The electrical configuration of each triax DETECTOR connector is shown in Figure 2-3 .
Connector terminals are designated as follows:
• Center conductor of the connector (and triax cable): current input. This terminal
connects to one terminal of the photodiode being used as a detector.
• Inner ring of the connector and inner cable shield: voltage bias source. This termi-
nal connects to the other photodiode terminal.
• Outer ring of connector (shell) and outer cable shield: chassis ground.
Figure 2-3
DETECTOR connector terminals
CURRENT OUTPUT and VOLTAGE SENSE connectors
CURRENT OUTPUT and VOLTAGE SENSE are BNC jacks used for making connec-
tions to the laser diode under test. CURRENT OUTPUT HI and LO provide current
source connections to the DUT, while VOLTAGE SENSE HI and LO sense the voltage
across the DUT. Note that the center pin of each connector is signal, while the outer shell
is chassis ground.
Interlock connections
The Model 2520 has two interlock circuits, a remote interlock and a key interlock.
NOTE
Both interlocks must be enabled to operate. Otherwise the source outputs will
not turn on.
Remote interlock connections
A remote interlock switch should be wired to pins 1 and 9 of the REMOTE INTERLOCK
connector, as shown in
Figure 2-4 . (Connections can also be made between pins 1 and 5).
The switch must be configured to close contacts (enabled) to operate. See Section 9 for
more information.
Voltage
Bias
Output
Detector
Current
Input
Chassis
Ground