The Ku-band Network Nara Institute of Science and Technology AI3 Nara NOC Team UMEDA Toshiyuki

The state of Nara NOC s Aug 15-16, All equipment to the new room s Cold Dry and Clean room s All router and modem have few troubles s The new cables are introduced. s The receiving signal power is higher than before

The measurement of the receiving signal power s The signal power from ITB, AIT and NAIST (9/1 - 9/30) s From NAIST is a return signal power s We measured the network unavailable time. s The C/N of the receiving power is under 6dB

The receive signal power s ITB s 761min is under 6dB(C/N) s 98.24% is available s AIT s 250min is under 6dB(C/N) s 99.41% is available

The receive signal power (2) s NAIST s 54.5min is under 6dB(C/N) s 99.87% is available

The signal power chart

The problems s ITB s The receiving signal power is variable s AIT s The receiving signal power is very variable s The receiving signal power is a little low

How to solve the problems s Please ask Mr. Mizuno

s 1 1:13: :00:00 (406.5min) s 1 12:41: :48:00 (7min) s 1 13:05: :12:00 (6.5min) s 20 9:43: :39:30 (56.5min) s 20 17:14: :40:00 (26.5min) s 20 19:27: :28:00 (0.5min) s 22 15:27: :35:30 (8min) s : : 17: : 1min30sec s : : 06: : 30sec s : : : : 57min30sec s : : 16: : 5min s : : : : 163min30sec s : : 19: : 21min30sec