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3
Performance Tests
52/155 and 622 Mb/s Optical Output Checks
NO TE
88
OC-1/STM-0 Power Level and Eye Mask Tests
1 Press <Menu>, choose Tx/Rx > Stored Settings then press
<Select>. Select Default then Recall.
2 Press <Menu>, choose System > Preferences then press
<Select>. Set Network Standard to SONET.
Set the transmit Signal Rate to OC1, Wavelength 1310 nm
(or if this is not fitted, or already tested, select 1550 nm).
Ensure the Laser is set to OFF.
3 Connect the 52 Mb/s Optical Out Port (1310/1550 nm) to the
Oscilloscope via an Optical Attenuator. Set the attenuator to
provide approximately 6 dB attenuation, (see Note). Also
connect the TX Eye Clock (52 Mb/s - 2.5 Gb/s) to the scope
Trigger input.
Optical signal should be attenuated to ensure specified maximum input for
86103A (–4 dBm) is not exceeded. To ensure this, Set the 8156A to 3 dB,
(typical 8156A attenuator insertion loss of approximately 3 dB), giving
approximately 6 dB total attenuation.
Installation and Verification Manual
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