2. Preparatory Measurement
WRS broadcast and WRS L1 synchronisation
PPS alignment (Scope)
WRS fabric time delay in different L1 ports (6,7,9)

3. Measured in advance = 24540 ps (consistent with length 500±1 cm)
SC (patch A)
WRS Broadcast
Port 18
WR Calibrator Optical Box
DC (patch D)
WRS L1
Port 6
Port 7
Port 9
DC (patch C)
SC (patch B)
SFP
KM3NeT WR reference calibrator
All fiber patches (A,B,C,D) have equal length and, thus equal time delay
Measured in advance = ps (consistent with length 500±1 cm)
The WR Calibrator Optical box has measured time delays
SC line = ps
DC line =11251 ps
Bidirectional line =

4. Results of the preparatory Measurement
WRL1 PORT 6 and SFP ch21H on Calibrator CLB

5. Results of the preparatory Measurement
WRL1 PORT 7 and SFP ch21H on Calibrator CLB

6. Results of the preparatory Measurement
WRL1 PORT 9 and SFP ch21H on Calibrator CLB
Average refers to SFP ch21H only

7. ARCA Shore Station Optical asymmetry measurement
Compliant to requests of TDR v2 till May 2016

8. Measurement of Shore Station DC Path
SC (shore station fiber)
Optical Rack
WRS Broadcast
Port 18
MEOC FC/APC connector
SC (patch B +
FC/APC to LC fiber 1m)
WR Calibrator Optical Box
5 dB
DC (patch D)
SC (patch A)
5 dB
WRS L1
SFP
Port 6
Port 7
Port 9
KM3NeT WR reference calibrator
Measurement of Shore Station DC Path

9. Results of the asymmetry (SC path) Measurement
WRL1 PORT 7 and SFP ch52C on Calibrator CLB (ARCA-DU001)

10. Results of the asymmetry (SC path) Measurement
WRL1 PORT 6 and SFP ch51C on Calibrator CLB(ARCA-DU002)
(Average) difference of only 270 ps among the two ports

11. Measurement of Shore Station DC Path
SC (patch A)
Optical Rack
WRS Broadcast
Port 18
MEOC FC/APC connector
SC (shore station)
DC (patch B +
FC/APC to LC fiber 1m)
WR Calibrator Optical Box
DC (patch D)
20 dB
5 dB
WRS L1
SFP
Port 6
Port 7
Port 9
KM3NeT WR reference calibrator
Measurement of Shore Station DC Path

12. Results of the asymmetry (DC path) Measurement
WRL1 PORT 7 and SFP ch52C on Calibrator CLB (ARCA-DU001)

13. Results of the asymmetry (DC path) Measurement
WRL1 PORT 6 and SFP ch51C on Calibrator CLB(ARCA-DU002)
(Average) difference of ps among the two ports (ARCA DU001 delay is larger)

14. ARCA Shore Station RTT Cable measurement
New request on May 2015 (TDR v3) Measure RTT_cable of DU Test Station and ARCA Shore Station
indirect way to recover RTT_Cable

16. SFP SC (shore station fiber) Optical Rack WRS Broadcast
Port 18
MEOC FC/APC connector
SC (shore station fiber)
patch B +
FC/APC to LC fiber 1m
(SC and DC)
WR Calibrator Optical Box
patch D(DC)
patch A (SC)
WRS L1
SFP
Port 6
Port 7
Port 9
KM3NeT WR reference calibrator

17. Results of the Shore Station RTT Cable Measurement
WRL1 PORT 7 and SFP ch52C on Calibrator CLB(ARCA-DU002)