N4917B Datasheet, PDF (10/21 Pages) Keysight Technologies – Optical Receiver Stress Test Solution

10 | Keysight | N4917B Optical Receiver Stress Test Solution - Solution Brochure
SR4 Transceiver Test
In this example, there are four separate fibers, carrying one signal per fiber. Attenuators in each
fiber are used to set the relative optical modulation amplitude with respect to the lane under
test. The calibrated stressed eye signal is connected to the lane under test.
BER measurement during the Jitter Tolereance test sweep can either be read from the device
under test or optionally looped back to the BERT for fully automated JTOL testing.
4x MM fiber
Optical
Attenuator
Optical
Attenuator
Optical
Attenuator
Optical
4x_AM_tteM_nuf_ai_tb_oe_r r
Data
TX 1
Generator
0
Data
TX 2
Generator
01
Data
TX 3
Generator
2
Data
TX 4
Generator
3
RX 4
Error
Checker 3
Error
RX 3
Checker 2
Error
RX 2
Checker 1
Error
RX 1
Checker 0
DUT 100GBAS-E-SR4 Transceiver
Calibrated Optical
Stressed Eye Signal
Optional Electrical
return path to BERT
Example 100GBASE-SR4 setup for running a stressed receiver sensitivity test on a device
Figure 8. Example 100GBASE-SR4 setup for running a stressed receiver sensitivity test on a device