1-46
General Information
Specifications
data.
Dynamic Range: 18dB minimum.
Maximum Input Power: -8 dBm. (For
BER of 1.0E-10). If > +3.0 dBm then
damage may result.
Connector: Customer Exchangeable
system.
Alarms Detected: Loss of Signal:
Loss of signal is detected in the optical
receiver whenever the light level falls
below approximately -30dBm ±3dBm.
To extinguish the alarm requires a light
level approximately 1 - 2 dB higher
than this threshold.
General Jitter Receiver
Specifications
Jitter measurement ranges:
Range 1.6 - 0 to 1.6 UI
Range 16 - 0 to 16 UI
These ranges fulfil the measurement
requirements of ITU-T Rec. O.171
Table 3
Range accuracy:
Range 1.6 - ±0.01 UI
Range 16 - ±0.03 UI
Intrinsic jitter:
Range 1.6 (2, 8, 34, 140 Mb/s):
Clock - ±0.02 UI
Range 1.6 ((2, 8, 34, 140, 155.52 Mb/s
electrical): PRBS - ±0.02 UI
Range 1.6 (155.52 Mb/s optical):
PRBS - ±0.03 UI
Range 1.6 (622.08 Mb/s optical):
PRBS - ±0.04 UI
Range 16 (2, 8, 34, 140 Mb/s):
Clock - ±0.07 UI
Range 16 (2, 8, 34, 140, 155.52 Mb/s):
PRBS - ±0.1 UI
Range 16 (622.08 Mb/s):
PRBS - ±0.2 UI
Values are pk-pk jitter measured with
HP1 filter present.
Jitter Transfer Receiver
Characteristics
The value plotted is the Transfer
Function, calculated using equation
Measurement Bandwidth: 10Hz
Dynamic Range: +5dB to -40dB
Stability: 0.02dB
The Measurement cycle must be started
within 10 minutes of the completion of
the Calibration cycle.
Calibration: 0.01dB
Accuracy: The figures quoted in the
following table includes Stability &
Calibration factors,
Examples:
Input 1.5UI, +0.5dB Transfer Function,
output is 1.589UI. The accuracy will be
0.04dB.
Input 0.2UI, -19.5dB Transfer
Function, then output is 0.0219UI. The
accuracy will be 0.5dB.
Ideally there should be no coherent
spurious signals generated by the UUT
as any such signals close to
measurement frequencies will degrade
the instrument performance.
The input Line Rate should be within
±50 ppm of nominal to achieve
Accuracy quoted.
Jitter Transfer Function Accuracy
Rx Jitter Amplitude UI Accuracy dB
3 to 0.3 0.04
0.3 to 0.03 0.25
0.03 to 0.01 0.5
0.01 to 0.003 1
0.003 to 0.001 3
20
Jout
Jin
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dBlog
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