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PN 8500-0150, Rev. A, May 2005 3
Operating Manual
Installation
2 — Installation
Installation
This section describes the unpacking, inspection, installation, and operation of the
Symmetricom 5401 and 5402 Disciplined Rubidium Oscillators.
Unpacking and Inspection
The DRO is packaged in one shipping container. Inspect the unit for visible damage
(scratches, dents, etc.). If the instrument is damaged, immediately notify both Symmetricom
and the responsible carrier. Keep the shipping container and packing material for the carrier's
inspection.
Symmetricom 5401 Installation Procedure
1. Install the unit in the desired location and connect the unit to its power source. Refer to
Chapter 4 for specifications and connector pin assignments.
2. Connect the 1 PPS input to its 1 PPS source and connect the 1 PPS and 10 MHz outputs
to their desired destinations.
Connection to the RS-232 I/O is not necessary for operation, but it is desirable in order to
monitor status or enter new control parameters.
Symmetricom 5401 Initial Operation
Upon completion of the installation:
1. Apply power to the unit and observe that the green POWER LED indicator illuminates.
Note that this unit does NOT contain a power switch.
2. After approximately five minutes, the yellow LOCK LED indicator will illuminate indicating
that the internal Rubidium oscillator has attained lock (resonance). The 10 MHz outputs
are now stable for use. Disciplining of the Rubidium oscillator will begin once a 1 PPS
input is present.
Note: When communicating with either Symmetricom or the responsible carrier
regarding shipping damage, refer to the serial number. This number is located
on the front panel of the 5401 and the rear panel of the 5402.