User`s guide

Performance Test Instructions Performance Tests
Agilent 81689A, 81689B and 81649A Tunable Laser Modules User’s Guide, Third Edition 55
13 Note the maximum and minimum values of the calculated Power
Linearity values for the various settings and record these in the test
record.
14 Subtract the minimum values from the maximum values of the
Power Linearity for the various settings. Record these as the Total
Power Linearity.
Example (Agilent 81689B)
Power Linearity
Maximum Power Linearity at current setting + 0.08 dB
Minimum Power Linearity at current setting - 0.07 dB
Total Power Linearity = (Max Power Linearity - Min Power Linearity) 0.15 dBpp
Power Setting from
start
Measured Relative
Power from start
Power reduction
from start
Power Linearity at
current setting
Start = REF + 10.00 dBm 0.00 dB + 0.00 dB = 0.00 dB
+ 9.00 dBm - 1.02 dB + 1.00 dB = - 0.02 dB
+ 8.00 dBm - 1.92 dB + 2.00 dB = + 0.08 dB
+ 7.00 dBm - 3.02 dB + 3.00 dB = - 0.02 dB
+ 6.00 dBm - 3.95 dB + 4.00 dB = + 0.05 dB
+ 5.00 dBm - 5.07 dB + 5.00 dB = - 0.07 dB
+ 4.00 dBm - 5.96 dB + 6.00 dB = + 0.04 dB
+ 3.00 dBm - 7.05 dB + 7.00 dB = - 0.05 dB
+ 2.00 dBm - 8.01 dB + 8.00 dB = - 0.01 dB
+ 1.00 dBm - 8.98 dB + 8.00 dB = + 0.02 dB
0.00 dBm - 9.95 dB + 9.00 dB = - 0.05 dB