Operation 4–2
4.1.2 Fuse Holder
The AC Power inlet includes a Fuse Holder drawer which holds two fuses, as both Live and
Neutral lines are fused for protection. The drawer can be opened using a finger once the power
cord has been removed from the inlet.
The correct fuse for this instrument is a 20 x 5mm 1.6A ‘T’ Type HRC
Please read section 1.2 before connecting the AC power.
4.1.3 Rear Panel Control Connections
Label Type Use Reference
DC BIAS INPUT Two 4mm sockets
To allow an external
DC power supply to
be connected to the
DUT.
Sections 4.1.4 and
4.4.8
RS-232 SOCKET 9-way D-type (female) For remote operation. Sections 4.1.9 and 5
USB USB socket Type A
Not used. For future
expansion.
Not applicable
LAN 8P8C (RJ45)
Not used. For future
expansion.
Not applicable
TRIGGER IN BNC
Duplicates action of
front panel trigger
key.
Section 4.1.7
GPIB Standard GPIB For remote operation. Sections 4.1.8 and 5
HANDLER 25-way D-type (male) Bin Handler (option)
Section 4.1.10 and
4.4.23
4.1.4 DC Bias Input
The rear panel DC BIAS INPUT terminals allow an external DC power supply to be connected
to the DUT. See section 4.4.8, paying special attention to the warning in that section.
4.1.5 USB
Not used. For future expansion.
4.1.6 LAN
Not used. For future expansion.
4.1.7 Trigger In
The TRIGGER IN BNC socket duplicates the action of the front panel trigger key. The input
is TTL compatible and when logic low is equivalent to operating the front panel trigger key.
This input is level sensitive and fully debounced, and includes a pull up resistor to enable
shorted contacts such as relays or footswitches to be used.
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