Agilent Technologies J-BERT N4903B Uživatelský manuál stáhnout pdf (Strana 5)

Agilent N4916B Applications

Analyze BER and eye

performance of half-rate

clocked devices

The clock multiplier option enables BER

measurements using the forwarded half-

rate clock to be used as sampling clock

for J-BERT N4903B.

Figure 5. Analyzing TJ, eye, or error performance of devices using half‑rate clocks with J‑BERT

N4903B analyzer and external clock generated by the N4916B clock multiplier option

Half-rate clock in

Full-rate

clock out

Full-rate data to

BERT analyzer

N4916B

Device under test

Transmitter (TX)

TX latch

TX PLL

J-BERT N4903B

Control and programming

The N4916B can be controlled via USB

interface from the J-BERT N4903B user

interface or from a stand-alone user inter-

face.Programming examples are provided.

Figure 6. Convenient control of de‑emphasis

parameters via the GUI of J‑BERT N4903B

Figure 7. The N4916B can be controlled from a PC program,

when operating as front‑end for ParBERT 81250A or J‑BERT

N4903A or other pattern generators.

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Agilent Technologies J-BERT N4903B Uživatelský manuál Strana 5