User guide

N O T E
The two additional error indicators "Symb Lock" and "8b10b Error"will only appear
if you select the error ratio as 8B/10B Symbol Comparison from the Error Detector
- Error Ratio's window. For more details, see “Symbol Lock Indicator” on page
192 and “8b10b Error Indicator” on page 192.
For troubleshooting information, see “Setup Problems - Concepts” on page 469.
The LEDs on these indicators turns green if:
• any of Jitter, ISI, or SSC is enabled
• the outputs are enabled (yellow if output protection is active on any of Data,
Clock, Aux Data or Trigger/Ref Clock Output).
This indicator turns blue when the instrument is under remote control.
N O T E
The instrument does not enter the remote lock state if the N4917A Optical Receiver
Stress Test Software is running on the instrument. This is because the N4917A
ORST Software also remotely controls the J-BERT.
The Show Error Messages button displays the error messages. It uses the color
codes to indicate the following possible states:
• No error messages: The button will be in disable state.
• New/unread errors: The triangle icon on the button will turn red.
7 Evaluating Results
374 Agilent J-BERT N4903B High-Performance Serial BERT
Status Indicators
Remote Indicator
Show Error Messages