11.8.15 ESI - Telecom Synchronisation References
Enhanced Synchronisation Inputs
Reference Inputs:
PPS and variable frequencies unframed, 1 kHz - 20 MHz
2,048 Mbit/s / 1,544 Mbit/s - E1/T1 framed
Input 1
1PPS (BNC female connector)
TTL, pulse duration
≥
5
µ
s, active high
Input 2
1 kHz - 20 MHz (BNC female connector)
sine (400 mV
pp
- 5 V
pp
) or TTL
Input 3
1 kHz - 20 MHz (RJ-45)
400 mV
pp
- 5 V
pp
into 120
Ω
, TTL
Input 4
E1 or T1 framed G.703 (RJ-45)
max. attenuation -12 dB (referred to the signal level)
into 120
Ω
Power Requirements:
5 V, +-5%, 250 mA
Status Indicators
LED St:
ESI status
LED In:
Status of the backplane’s reference signals
LED A
Status of the input signals (1 & 2) at the board
LED B:
Status of the input signals (1 & 2) at the board
Operation conditions:
Initialisation:
LED St
blue until configuration is done
LED In
off until configuration is done
LED A
off until configuration is done
LED B
off until configuration is done
expiration LEDs:
ALL LEDs
0,5 sec. red
→
0,5 sec. yellow
→
0,5 sec. green
→
0,5 sec. off
Normal Operation:
LED St
green
LED In
green
LED A
green, if PPS and Frequency
flashing green, if only Frequency
flashing yellow, if only PPS
off, if no signal
LED B
green, if Clock and Framed available
flashing green, if only Clock available
flashing yellow, if only Framed available
off, if no signal
ESI
A
B
1
2
3
4
90
Date: 27th May 2021
IMS - LANTIME M4000
