Safety and Preparation for Use
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CG635 Synthesized Clock Generator
Safety and Preparation for Use
Line Voltage
The CG635 operates from a 90 to 132 VAC or 175 to 264 VAC power source having a
line frequency between 47 and 63 Hz. Power consumption is less than 80 VA total. In
standby mode, power is turned off to the main board. However, power is maintained at all
times to any optional timebases installed. Thus, a unit with an optional rubidium or
ovenized quartz oscillator is expected to consume less than 25 VA and 15 VA of power,
respectively, in standby mode.
Power Entry Module
A power entry module, labeled AC POWER on the back panel of the CG635, provides
connection to the power source and to a protective ground.
Power Cord
The CG635 package includes a detachable, three-wire power cord for connection to the
power source and protective ground.
The exposed metal parts of the box are connected to the power ground to protect against
electrical shock. Always use an outlet which has a properly connected protective ground.
Consult with an electrician if necessary.
Grounding
A chassis grounding lug is available on the back panel of the CG635. Connect a heavy
duty ground wire, #12AWG or larger, from the chassis ground lug directly to a facility
earth ground to provide additional protection against electrical shock.
BNC shields are connected to the chassis ground and the AC power source ground via the
power cord. Do not apply any voltage to the shield.
Line Fuse
The line fuse is internal to the instrument and may not be serviced by the user.
Operate Only with Covers in Place
To avoid personal injury, do not remove the product covers or panels. Do not operate the
product without all covers and panels in place.
Serviceable Parts
The CG635 does not include any user serviceable parts inside. Refer service to a
qualified technician.
