N8511

Equipped with an optical channel selector (up to 16 channels) for wide-area measurements

Suitable for rack mounting with optical fiber connector in rear panel

Delivers high repeatability, allowing users to obtain stable data when taking repeated measurements

Boasts a wide dynamic range to produce stable measurement results in a short time

Operates without mechanical movement, providing the high reliability necessary for long-term measurement accuracy

Large internal memory enables high-speed data processing

Simultaneously measures up to 100,000 data points

Measurement function	Strain distance distribution Brillouin scattering spectrum Brillouin scattering loss distribution
Setting distance range	1, 2, 5, 10, 20, 40, 80 km
Refractive index setting range	1.00000 to 1.99999 (0.00001 steps)
Reading resolution	0.05, 0.10, 0.20, 0.50, 1.00 m
Number of measurement points	Up to 100,000 points
Measurement frequency range	10 to 12 GHz
Measurement frequency step	1, 2, 5, 10, 20, 50 MHz
Average setting count	2^10 to 2^24
Pulse width	10, 20, 50, 100, 200 ns
Strain measurement unit	με, %
Schedule measurement function	Start time reservation, interval method, and automatically switching of optical channels
Optical channel selector	8 or 16 channel (selected when placing an order)

Measurement wavelength	1.55 μm band
Strain measurement range *1)	100 με to 15000 με
Strain measurement repeatability *2)	< ±100 με
Strain measurement linearity *3)	±4×10-3
Pulse width	10 ns	20 ns	50 ns	100 ns	200 ns
Dynamic range *4)	3.5 dB	7.5 dB	11.5 dB	14.5 dB	16.5 dB
Distance measurement accuracy	± (5.0 × 10^(-5) × Measurement distance(m) + 0.2m + 2 × Reading resolution(m))

	*1)	For SMF: 1.3 μm-band zero-dispersion optical fiber (Complying with ITU-T G.652)
	*2)	Standard deviation (2σ) of 10 continuous measured strain values at a predetermined distance under the following conditions at fixed optical channel: Average count; 2^14, Measurement frequency step; 5MHz, and SMF (Complying with ITU-T G.652).
	*3)	Strain measurement linearity (Characteristic fluctuation is excluded.) under the following conditions: Average count; 2^14, measurement frequency step; 5MHz, and SMF (Complying with ITU-T G.652)
	*4)	Optical fiber loss that satisfies the strain measurement repeatability of <±100με under the following conditions: Average count; 2^14, measurement frequency step; 5 MHz, and SMF (Complying with ITU-T G.652)

Connector for measurement	SC/Angled PC
Laser class	Class 1 (IEC 60825-1:2001)

Rear panel of 16-channel type

AC Power Supply Input *5)	100 VAC - 120 VAC, 50 Hz/60 Hz 220 VAC - 240 VAC, 50 Hz/60 Hz (Automatically switches the input voltage between 100 and 220 VAC systems.)
Power consumption *6)	200 VA or less
External dimensions *6)	Approximately 430mm (W) × 266mm (H) × 500 (D) mm (Protrusions are excluded.)
Mass *6)	27 kg or less
Operating environment *5)	Temperature range: +10 to +40ºC Relative humidity: 85% or less (no condensation)
Storage environment *5)	Temperature range: 0 to +50ºC Relative humidity: 85% or less (no condensation)

	*5)	Specifications for the N8511 only. When used with a PC, the specifications relevant to that PC apply.
	*6)	Excluding PC.

Item	N8511 main unit and N8511 control software
Personal computer (PC) *7)	OS: Windows XP Professional SP2/SP3 Processor: Pentium4 1.5GHz or equivalent (Pentium 4 2.8GHz or more is recommended) Memory: 768 MB (1 GB or more is recommended.) Hard disk: At least 10 MB free hard disk space on the installation drive (50 GB or more is recommended for data storage area.) Display: 1024 × 768 pixel or more/True Color Disk drive: CD-ROM drive Other: Pointing device and Ethernet port *8)
StarFabric board *7)	Our specified interface board
StarFabric connection cable *7)	Two STP cables with CAT5E or more (5 m or less each)

	*7)	Not included. To be provided by user.
	*8)	Used to interface with another PC for LAN environment control.