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2-36 GB1400 User Manual
Set DATA
THRESHOLD
to this value
Verify these results on the Analyzer Comments
-0.50 volts
Press the ERROR DETECTION and ERROR
HISTORY “CLEAR KEYS”, then confirm:
SYNC LOSS and BIT LED’s are ON
SYNC LOCK LED is OFF
ERROR RATE display shows “NO
DATA” or a 50% Error Rate.
Data signal not detected. Selected
threshold is below the minimum level of
your data signal.
Approximately
-0.30 volts
to
-0.25 volts
Press the ERROR DETECTION and ERROR
HISTORY “CLEAR KEYS”, then confirm:
SYNC LOSS should turn OFF
BIT and PHASE LED’s should turn ON
SYNC LOCK LED should turn ON
You are starting to detect the data signal.
Selected threshold is near the minimum
level of your data signal. Data threshold
is NOT CORRECT and you should expect
BER errors.
+0.00 volts
Press the ERROR DETECTION and ERROR
HISTORY “CLEAR KEYS”, then confirm:
SYNC LOSS should turn OFF
BIT and PHASE LED’s should turn OFF
SYNC LOCK LED should turn ON
ERROR RATE display shows NO BER
ERRORS equivalent to a rate of
0.0E-9 or better.
Data signal fully detected. Selected
threshold is at an optimum value for the
input data signal. This is typically =
1/2*[max level - min level].
Signal levels detected above this
threshold are considered a logical “1”
and signal levels below this threshold are
considered a logical “0”.
+1.00 volts
Press the ERROR DETECTION and ERROR
HISTORY “CLEAR KEYS”, then confirm:
SYNC LOSS and BIT LED’s are ON
SYNC LOCK LED is OFF
ERROR RATE display shows “NO
DATA” or a 50% Error Rate
Data signal not detected. Selected
threshold is above the maximum level of
your data signal.