12.a. Which measurement is used to determine CWDM and DWDM channel losses? A. Span loss B. Patch cord loss C. Optical return loss D. Splice loss 12.b. Two channels in an OSA measurement are located at...

12.a. Which measurement is used to determine CWDM and DWDM channel losses?
A. Span loss
B. Patch cord loss
C. Optical return loss
D. Splice loss
12.b. Two channels in an OSA measurement are located at 1542.5 nm and 1537.2 nm. What's the channel
spacing?
A. 449 MHz
B. 56.6 MHz
C. 327 GHz
D. 670 GHz