Operation; Powering Up; Indicator Leds - Symmetricom 8040C User Manual

Operation

Powering Up

Connecting the power cord from the 8040C/8040CLN to the AC or DC source provides power
to the unit. For the DC version, on the power cord apply:
+24VDC on the red wire.
Ground or return on the black wire.
The POWER LED illuminates immediately thereafter. The LOCK LED illuminates within
five minutes, indicating that the 8040C's frequency accuracy is within +/-5E-8 of absolute
frequency. Removing the power cord from the IEC receptacle on the rear panel turns the
power off.

Indicator LEDs

CAUTION: Do not use the Symmetricom 8040C as a reference source until the LOCK
indicator is turned on.
The three LED indicators on the front panel provide a cursory view of the
8040C/8040CLN operating status.
POWER is lit when AC or DC power is applied to the unit.
LOCK is lit when the unit's Rubidium oscillator reaches operating temperature and its
frequency output is within specifications.
1 PPS SYNC is lit when a valid external 1 PPS signal is applied to 1 PPS IN.
Figure 2: Symmetricom 8040C/8040CLN Front Panel
Figure 3: Symmetricom 8040C/8040CLN Rear Panel
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Rev. C, 07/12/2011