Agilent Technologies 81640A Stud Sensor User Manual


 
Performance Test Instructions Performance Tests
Agilent 81480A and 81680A, 40A, 82A, 42A, & 89A Tunable Laser Modules Users Guide, Sixth Edition 91
5 Set the power for each Tunable Laser module to the values given in
Table Table 21.
NOTE For the Agilent 81480A and Agilent 81640A, the laser ouput power is
limited to its maximum possible value at this wavelength. The display
will probably show ExP.
6 Determine filter transmission characteristic (see Signal-to-Source
Spontaneous Emission Tests - Low SSE Outputs on page 83). You
may skip this step if the characteristic has already been determined.
a Determine minimum value of filter transmission and actual FBG
center wavelength l0 (see step 3 on page 86). You may skip this
step if the characteristic has already been determined.
b Note the wavelength of minimum transmitted peak power the
TLS is set to in the test record
TLS_l0 = ________ nm
c Mark the associated wavelength displayed on the OSA (OSA_l0)
and note the value in the test record
OSA_l0 = ________ nm
7 Record spectrum at minimum filter transmission:
Set TLS to the wavelength of minimum transmission (TLS_λ0)
Check that the laser output is activated.
8 Set the Optical Spectrum Analyzer:
a Set Span to 30 dBmnm. Press Span, enter the value.
b Set the Resolution Bandwidth to 1 nm. Press [AMPL], press [BW
Swp], and enter the value.
c Set the Sensitivity to -90 dBm. Press [AMPL], press [SENS], and
enter the value.
d Set the center wavelength to OSA_l0. Press Center and enter the
value.
e Set the reference level to -40 dBm. Press [AMPL], press [Ref
LVL], and enter the value.
9 Determine limits of SSE range by performing the following
calculations:
a Lower Transmission Band:
l
1
... l
2
Table 21 Power Settings for Signal to Total SSE Tests - Low SSE Outputs
Module Power [P]
Agilent 81480A - Output 1 7.00 dBm
Agilent 81680A - Output 1 6.00 dBm
Agilent 81640A - Output 1 7.00 dBm