Using an External SG
Make the following connections to use an external SG (signal generator).
See “Using the CDR Function through the Electrical Interface,” “Not Using the CDR
Function through the Electrical Interface,” and “Using the Optical Interface,” for
instructions on how to make connections to the DUT.
Coaxial cable
1
External
SG
* If you want to use an external signal generator that has a frequency that is 1/16 or
1/64 the bitrate, connect it to the BERT module’s REF CLOCK IN terminal.
If you want to use an external signal generator of the 10 GHz band, connect it to the
BERT module’s EXT CLOCK IN terminal.
Note
If you want to use a reference clock, make sure to apply a rectangular signal from the external
signal generator.
2.5 Connecting Cables
2-16
IM 735101-01EN