Agilent Technologies N4962A Podręcznik Użytkownika Pobierz pdf (Strona 19)

N4962A System Overview

Serial BERT 12.5 Gb/s User Guide 19

Controls

Local (button & light)

–

indicates local (vs. remote) control; button selects local

control

Receiver

On (button & light)

– indicates detector state; button toggles & resets BER

Data Pa

th >

PRBS

¯¯¯¯ (button & light) – indicates inversion of PRBS signal; button toggles

Select Path (button & 3 lights)

– data path (disabled, enabled, thru); button

cycles

Adjust

Freq (2 buttons)

– adjust the internal clock frequency up or down (shown on

display)

Ampl (2 buttons)

– adjust the PRBS output amplitude up or down (shown on

display)

ø (2 buttons)

– adjust the detector clock phase up or down (shown on display)

Config State (2 buttons)

– change value of the currently-displayed

configuration state

Display

Scroll (2 buttons & 6 lights)

– select which feature is shown on the display

panel:

• BER – measured BER (# bit errors / total # bits)

• ε time (sec) – elapsed time of BER measurement, in seconds

• Ampl (V) – single-ended PRBS gen

erator output amplitude, in volts per

side

• Freq (GHz) – internal clock frequency, in GHz (10 GHz corresponds to

10 Gb/s)

• Ø – BER clock phase adjustment, in degrees (360-degrees = 1 UI)

• Config State– selects one of the configuration states shown in Table 1.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 87 88

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Agilent Technologies N4962A Podręcznik Użytkownika Strona 19