Spectracom Corporation
EPSILON CLOCK MODEL EC1S
EPSILON CLOCK User’s Manual
4-1
4
4
4
4
SDH/E1 Option
SDH/E1 Option
SDH/E1 Option
SDH/E1 Option
When installed, this option provides:
•
SDH / E1 synchronization for SSU functionality such as ITU G.811 GPS PRC when
locked on GPS
•
GPS back-up to provide excellent holdover performance.
This option is for the EC1S-SO and EC1S-DO.
4.1
4.1
4.1
4.1
2.048 MHz Output
2.048 MHz Output
2.048 MHz Output
2.048 MHz Output
Connector:
AUX2 SMA Female
Pin Settings
Center contact:
Sine-wave signal
Outer contact:
Ground
Signal characteristics:
- G.703 § 13 / 75
Ω
- MTIE / TDEV: Meets the ITU G.811 recommendations when GPS-locked
4.2
4.2
4.2
4.2
2.048 MHz Input
2.048 MHz Input
2.048 MHz Input
2.048 MHz Input
The EPSILON CLOCK MODEL EC1S can be synchronized with an external input 2.048MHz
when GPS is lost. This yields excellent holdover performance.
Before all switching, the EPSILON CLOCK MODEL EC1S must be locked on GPS at least one
hour to allows a good 1PPS synchronization to the UTC.
After this delay, if an external reference is connected, the EPSILON CLOCK MODEL EC1S
switch automatically on this last as soon as the GPS is lost. The led “locked” is blinking . The
1PPS and frequency drifts are in accordance with the external input 2.048MHz medium term
accuracy.
The 1PPS timing performances are again guaranty respect to UTC, ½ hour after the GPS is
back.