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Agilent N4965A Multi-Channel BERT 12.5G

The Agilent N4965A multi-channel BERT 12.5 Gb/s is a modular, multi-

channel signal integrity test system ideal for characterizing multi-lane

serial data channels. By adding remotely mountable heads, each of its

5 channels can be configured as either a pattern generator, or error

detector to form a bit error rate tester (BERT). Patterns available include

various lengths of hardware generated PRBS, clock patterns, and DC logic

0 and logic 1.

All heads can operate with differential or single ended signal connections.

Output parameters in the generator heads and input parameters in the er-

ror detector heads can be programmed independently, or ganged together

for convenience. Presets for common logic families simplify user set up.

Key features

• Modular architecture supports 1 to 5 pattern generator or error

detector heads

• Pattern generators included integrated two or four tap de-emphasis

• Programmable generator output/detector input parameters

• Transparent jitter pass-through

• Unique swept aggressor channel delay for crosstalk characterization

• BER, bathtub and jitter tolerance testing with N4980A

• Remote control through USB or GPIB

• Compact size

Applications

• Serial data receiver characterization up to 12.5 Gb/s

• Multi-lane device characterization

• Crosstalk characterization

Data rate range 1.0 to 12.5 Gb/s

Clock delay range (All channels) 0 to ±1000 UI

Delay sweep for crosstalk testing (All channels) 0, 1, 2, 4 UI pp

Pattern selection:

Clock ÷ N, where N = 2,4 (Option –P12), ÷ N, where N = 2, 4, 8, 16, 32, 64 (Option -D12)

Data output amplitude range 0.2 to 2.0 V single ended (Option -P12), 0.6 to 1.2 V single ended (Option -D12)

De-emphasis 2-tap: 1 post cursor, Range 0 to –20 dB (Option –P12)

4-tap: 1 pre cursor, 2x post cursor (Option –D12)

Range Pre: 0 to +8dB, post 1: 0 to –10 dB, Post 2: 0 to –8 dB

Data output configuration Differential. May be operated single end with unused output terminated into 50 Ω. AC

Coupled with internal bias tee.

Pattern selection PRBS 2

– 1, n = 7, 10, 15, 23, 31

Data input range 100 mV to 1 V (p-p) single ended

Data delay range ± 1000 UI

Data input configuration Differential. May be operated single end with unused output terminated into 50 Ω. AC

Coupled with internal bias tee

Measurements Accumulated BER, error count, data loss, sync loss. Multi-channel BER, bathtub scan,

jitter tolerance testing (with N4980A software)

Multi-channel BERT controller (requires external clock signal e.g. N4963A clock synthesizer)

N4955A pattern generator remote head specifications

N4956A error detector remote head specifications

Remote head options:

• N4955A-P12 pattern generator with 2-tap de-emphasis 12.5 Gb/s

• N4955A-D12 pattern generator with 4-tap de-emphasis 12.5 Gb/s

• N4956A-E12 error detector 12.5 Gb/s

N4965A controller options

• N4960A-CTR multi-channel BERT controller

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