Agilent Technologies 83437A, Руководство пользователя, Страница: 25 / 106

2-5
Making Measurements
Performing Stimulus-Response Measurements
To characterize a passive device
1 Turn on the optical spectrum analyzer and the Agilent 83438A, and allow them
to warm up for 1 hour.
2 Use a fiber optic cable to connect the Agilent 83438A’s output to the input of
the optical spectrum analyzer.
3 On the optical spectrum analyzer, press INSTR PRESET , AUTO MEAS , and then
AUTO ALIGN .
4 On the optical spectrum analyzer, use the START and STOP keys to set the proper
wavelength range.
5 Press REF LEVEL , and set the reference level to –10 dBm.
6 Press SENS, and set the sensitivity to –70 dBm. You can increase the sensitivity
beyond this value if needed.
7 If you are measuring a deep-notch filter, more sensitivity may be required.
Perform the following steps:
a Press Amptd , MORE , and then CHOP On so that On is underlined.
b Press BW,Swp , SWPTIME AutoMan , and set the sweep time to 50 seconds.
These steps cause the optical spectrum analyzer to compensate for the
effect of stray light inside the analyzer’s monochromator.
8 Press State , instr modes , and then STM/RESP .
9 Press STORE THRU->B, and then NORM On Off to normalize the response.