201
Appendix D. Performance Test
Test III. CW-Stability Short Term
b
Ensure that the instruments have warmed up and that the
laser has settled.
2
Zero the HP 8153A:
a
Mount the protection cap on the head in order to keep the
light out.
b
Press M
ENU
to change to Measure Mode.
c
Press Z
ERO
and wait while zeroing.
d
Unmount the protection cap and connect the equipment as
shown in Figure D-3.
3
Set up the HP 8153A:
a
Select Auto Range: Press A
UTO
.
b
Select averaging time100ms:
Press P
ARAM
until the averaging time is displayed.
Use the modify keys to change to 100ms.
c
Select display in dB:
Press
D
B
d
Set wavelength to the actual wavelength:
Press P
ARAM
until the wavelength is displayed.
Use modify keys to edit the wavelength.
4
Set power meter to datalogging:
a
Select STABILITY application:
Press M
ENU
, press R
ECORD
.
b
Set the total measurement time to 00:15:00 for short term
stability test of 15 minutes:
Press E
DIT
and set T_TOTAL to 00:15:00 using the modify
cursor keys.
c
Set AUTODUMP OFF:
Press N
EXT
and use modify cursor keys to set autodump to
off.
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