HP 8168E - Page 172

D
without attenuator with attenuator
8167A -5dBm -6.5dBm
8168D -5dBm n/a
8168E -1dBm -2.5dBm
8168F +1dBm 0.0dBm
c. Make sure the optical output is inactive.
3. Set the Power Meter
a. Zero the 8153A
b. Select Auto Range
c. Select averaging time 500ms
d. Select display in dB
e. Set the wavelength to
HP 8167A 1310nm
HP 8168D,E,F 1540nm
4. Activate the optical output.
5. Measure the output power with the Power Meter
6. Press 4
DISP- > REF
5
7. Change the power setting on the TLS to the next value listed in the test
report and measure the power again.
Note the displayed value on the Power Meter as \Relative Power of actual
setting".
8. Calculate the \Power Linearity at current setting" as
\Relative Power of current setting" + \Power Reduction from start
condition"
9. Repeat list item 7 to list item 8 for all power levels listed the test report.
10. Check the calculated values of the Power Linearity of the various settings
for the maximum and minimum values and note these in the test report.
11. Calculate the dierence for the maximum and minimum values of the
Power Linearity of the various settings as Final Power Linearity
D-12 Performance Tests