User`s guide

Performance Tests Performance Tests

Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition

3 Move to the Laser Source channel, move to the wavelength parameter,

[λ], press Enter, select the lower wavelength source, and press Enter.

4 If you are using an Agilent 81657A Laser Source make sure you initialize

the Agilent 8156A Optical Attenuator with 30 dB attenuation.

5 Turn the instruments on, enable the laser source and allow the

instruments to warm up for at least 20 minutes.

6 Perform the following sub-procedure for both Power Meters:

a Move to the Power Meter channel.

b Move to the wavelength parameter, [λ], press Enter, enter the

wavelength of the laser source, and press Enter.

c Move to the calibration parameter, [CAL], press Enter, set the

calibration parameter to zero, and press Enter.

d Move to the averaging time parameter, [AvgTime], press Enter,

move to <500 ms>, and press Enter.

e Move to the power parameter, [P], press [Pwr unit], move to

<Watt>, and press Enter.

7 Make sure the optical input of the Device Under Test (DUT), 8162xA/B,

is not receiving any light by placing a plastic cap over the input. Move to

the DUT Power Meter channel, press [Menu], move to <Zero>, press

Enter.

8 Ensure that the Agilent 8156A output is disabled. Move to the reference

Power Meter channel that uses the Agilent 8162xB Optical Head and

Agilent 81618A Optical Head Interface module, press [Menu], move to

<Zero>, press Enter.

9 Enable the Agilent 8156A output and change the attenuation until the

reference Power Meter displays 10.00 mW.

10 Connect the attenuator output cable to the DUT Power Meter. Note the

power value returned from the DUT, [P], from the display and note the

result in the test record.

11 Move to the Laser Source channel, move to the wavelength parameter,

[λ], press Enter, select the longer wavelength source, and press Enter.

12 Repeat steps 4 to 10 at the second wavelength with the corresponding

source.