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switches the power from this jack to the input of the Reference 600+’s DC-DC converter. All protection
circuitry, including the in-rush current limiter, are located after this switch.
Normally, the DC power is connected before the Power switch is turned ON. However, no damage occurs
if this switch is already in the ON position when the
Power In cable is connected, or the AC power input
is connected to the external power supply.
Chassis Ground
The rear panel Chassis Ground is intended for one
use only. When the Reference 600+ is used with
cells isolated from earth ground, connecting the
chassis ground to earth ground may lower the noise
measured in the system. Note that the chassis of the
Reference 600+ is connected to Floating Ground.
See Chapter 1Error! Reference source not found.
for safety information concerning this connection.
Either a banana plug or the stripped end of a wire
can be connected to the Chassis Ground binding
post. The other end of the wire is then connected to
earth ground.
A black banana-plug to banana-plug lead has been
provided with your Reference 600+. You may find it
useful when making this earth ground connection.
USB Port
The USB port on the rear panel of the Reference
600+ is a Type B connector as defined in Revision
1.1 and 2.0 of the USB Specification. Use a
standard, shielded, Type A/B cable to connect this
port to a computer’s USB port or a USB hub
(preferably an externally powered hub). The two
ends of a Type A/B cable are different. The more-
rectangular end plugs into the computer and the
more-square end plugs into the Reference 600.
A suitable USB cable was included with your
Reference 600+ shipment. If this cable is lost, you
can replace it with a cable from your local computer
retailer.
The Reference 600+ is a High Speed USB 2.0 peripheral, able to transfer data at 480 Mbits/second. If it is
plugged into a computer port incapable of High Speed operation it will downgrade to USB 1.1 full-speed
operation (12 Mbits/second), causing slower data-transfer.
The Reference 600+ USB port is compatible with Revision 1.1 and 2.0 of the USB specification. It
supports the Windows
®
Plug-n-Play mechanism, including dynamic connect/reconnect.
The front panel USB LED should be green whenever a valid computer to Reference 600+ connection has
been made, and both the computer and Reference 600+ are fully powered.
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