EPSILON CLOCK MODEL EC20S
Spectracom
User’s Manual
98
Frequency
OXCO
Rubidium oscillator
10Hz
-120dBc/Hz
-110dBc/Hz
100Hz
-135dBc/Hz
-130dBc/Hz
1kHz
-145dBc/Hz
-140dBc/Hz
10kHz
-150dBc/Hz
-145dBc/Hz
100kHz
-150dBc/Hz
-145dBc/Hz
17.1.4
HOLDOVER MODE
If all the enabled synchronization sources are unavailable, the EC20S transits into the
‘
Holdover
’
mode
in which it maintains the generation of the Time of Day messages and the synchronization output signals
(1PPS, 10MHz).
-
According to EN 300462
–
4
–
1 (§9.2) (Transmission and Multiplexing (TM) - Generic requirements
for synchronization networks).
-
Stability
•
With an OCXO
: < ± 2x10
-10
/day
•
With a Rubidium oscillator
: < ± 5x10
-11
/day
17.1.5
SHORT TERM STABILITY (ALLAN VARIANCE)
Time interval
OXCO
Rubidium oscillator
1 second
1x10
-11
3x10
-11
10 seconds
3x10
-11
1x10
-11
Summary of Contents for Spectracom EC20S
Page 44: ...EPSILON CLOCK MODEL EC20S Spectracom User s Manual 44 13 3 CLOCK STATUS PAGE...
Page 58: ...EPSILON CLOCK MODEL EC20S Spectracom User s Manual 58 13 6 SNMP TRAPS SETUP PAGE...
Page 60: ...EPSILON CLOCK MODEL EC20S Spectracom User s Manual 60 No No trap is generated...
Page 82: ...EPSILON CLOCK MODEL EC20S Spectracom User s Manual 82 13 13 ADMIN PAGE...
