Agilent Technologies N4970A Manual de usuario descargar pdf (Pagina 28)

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Agilent N5980A 3.125 Gb/s Manufacturing Serial BERT

• Standard measurements at rates between 125 Mb/s and 3.125 Gb/s

• Generation of pseudo random bit sequence (PRBS) polynomials and

a K28.5 pattern at low voltage differential signal (LVDS) or emitter

coupled logic (ECL) levels

•

Flexible connections to the device under test via 3.5 mm differential

electrical coax connectors and/or standard optical

• SFP module plug-ins

• Optical and electrical error injection once or at selectable bit error

ratio (BER)

•

Analysis of gated BER with display of the absolute number of errors

and selectability of gate time

• Dramatically simplified transceiver measurements that provide just the

essential tests via the one page graphical user interface (running on

an external Windows XP PC via a USB 2.0 interface)

•

Full programmability of all graphical user interface features from

another software program

The Agilent N5980A 3.125 Gb/s serial BERT is ideal for manual or

automated manufacturing test of electrical and optical devices running

at speeds between 125 Mb/s and 3.125 Gb/s. It addresses all common

standard speeds via selectable bit rates.

Easy-to-use and cost efficient

The software user interface has one standard or one advanced screen to

ensure intuitive use for operators. It makes the instrument easy to use and

easy to learn.

Twice the measurement throughput

By using both the electrical and optical (SFP) interfaces concurrently, you

can double your measurement throughput (electrical in/optical out and

vice versa).

Automation made easy

The remote programmability of the user interface, using SCPI – syntax,

makes it simple to integrate the N5980A into other programs.

PRBS, K28.5 pattern or clock generation and integrated clock

data recovery

The N5980A can generate standard PRBS polynomials, K28.5 (‘Comma’)

characters and different sub-rate clocks (/2 to /20). It can also inject

errors with an adjustable error ratio. The receiver has a clock-data

recovery (CDR) built-in and differential inputs (SMA) for signals from

50 mVpp to 2 Vpp amplitude.

Standard (SFP) optical module plug-in

The instrument has a standard SFP – female connector. This enables all

different kind of user-selectable optical modules e.g for multimode/

single-mode fiber at 850, 1310 and 1550 nm for the test set-up.

Specifications

Data rates

• Fast Ethernet: 125 Mb/s

•

OC-3: 155.52 Mb/s, OC-12: 622.08 Mb/s, OC-48: 2.48832 Gb/s

• OC-48 with FEC: 2.66606 Gb/s

• 1 x FC: 1.0625 Gb/s, 2 x FC: 2.125 Gb/s

• 1 x Gb Ethernet: 1.25 Gb/s

• XAUI: 3.125 Gb/s

• Accuracy: ±50 ppm

Pattern generator

Pattern

• PRBS: 2

– 1, 2

– 1

•

Data pattern: K28.5

• Clock pattern: Data rate divide by n, n = 2, 4, 8, 10, 16, 20

• The pattern can be individually adjusted for pattern generator

electrical out and optical out

Error injection

• Fixed electrical and optical error inject

• Fixed error ratios of 1 error in 10

bits, n = 3, 4, 5, 6, 7, 8, 9

• Single error injection

• Separate error ratios can be adjusted for pattern generator electrical

out and optical out

Pattern generator electrical out

A differential electrical output is provided on the front-panel

Output amplitude

ECL: 850 mVpp typ., single-ended/1700 mVpp typ., differential

LVDS: 400 mVpp typ., single-ended/800 mVpp typ., differential

Jitter: 0.05 UI typ. @ OC-12, 0.08 UI typ. @ GbE, 0.15 UI typ. @ OC-48

Pattern generator optical out

• A standard SFP housing is provided

• Minimum number of insertion/deinsertion cycles: 200

Error detector

• A differential electrical input is provided on the front-panel

• Data rate is the same as pattern generator

•

Pattern: PRBS: 2

–1, 2

–1

•

Data input: Differential AC coupled

• Max. input amplitude: 1 Vpp, single-ended, 2 Vpp, differential

•

Clock data recovery: Internal CDR

• Impedance: 100 Ω nominal, Sensitivity: < 50 mV

• Synchronization: Automatically on level, polarity, phase, bit and

pattern

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 39 40

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