Agilent Technologies N4962A Podręcznik Użytkownika Pobierz pdf (Strona 28)

System Details and Performance Specifications

Serial BERT 12.5 Gb/s User Guide

Figure 6. N4962A block diagram – PRBS generator

The PRBS output bit stream is amplified by an adjustable gain stage. The

output amplitude ranges from 300 mV pp to 1800 mV pp per output (0.6 V pp to

3.6 V pp differential) in 10 mV pp increments.

The amplified PRBS output signal is available from the single-ended or

differential 2.92 mm K-connector OUT/OUT¯¯¯connectors on the front panel. The

PRBS generator also generates a pattern trigger output, available from Pat

TrigO on the back panel, which changes state after 32 complete PRBS bit

streams have been generated. Pat TrigO has a frequency equal to

(clock_rate) / (32 * bit_pattern_length). Users of Pat TrigO should verify that its

output is a square wave in order to ensure proper pattern triggering.

Table 6. Parameters for N4962A PRBS generator (OUT, OUT¯¯¯)

Data rate

0.5 to 12.5 Gb/s

PRBS patterns 2

– 1, n=7, 10, 15, 23, 31

Mark space density 1/2, 1/4, 1/8

Pattern invert

available for all patterns

Error injection

selectable uniform rate

Error injection rates

1 x10

errors per second, n = 1, 2, 3, 4, 5, 6, 7

Data output amplitude 300 to 1800 mV pp (single-ended)

Data output amplitude resolution 10 mV

Data output jitter 1.1 ps rms typical at 10 Gb/s

Data output rise/fall time (20% to 80%)

18 ps typical, 23 ps maximum

Data output external interface

(May be operated single end without unused output

terminated into 50 Ω.)

TXCKI Clock input frequency range 0.5 to 12.5 GHz

TXCKI Clock input amplitude range 0 to +10 dBm (630 mV pp to 2 V pp)

TXCKI Clock input external interface

AC coupled, 50 Ω nominal, female SMA

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Agilent Technologies N4962A Podręcznik Użytkownika Strona 28