User`s guide

Performance Tests Performance Test Instructions

54 Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition

Relative Power Meter Uncertainty Test

Carry out the following Power Meter Uncertainty Test at 1550 nm or

another specified wavelength with single mode fibers using the

equipment listed in Table 2: Equipment required. To adapt for the

straight or angled contact versions of the attenuator use the

patchcords with appropriate connectors and the adequate connector

interfaces.

This test applies only to the Agilent 81566A and 815667A Attenuators

with integrated power meter.

NOTE Do not turn the laser off during the measurement. Clean all connectors

carefully before you start with the measurement !

1 Turn the instruments on and allow the devices to warm up (20..30

min).

2 Make sure that you perform this test in a temperature-controlled

environment with temperature fluctuations less than ±1°C.

3 Make sure that all your connectors are clean and undamaged.

4 Connect the equipment as shown below in Figure 17

Figure 17 Relative Power Meter Uncertainty Setup

5 Set both attenuators to the wavelength of the source and disable

them.

6 Set the attenuation [α] of 81561A reference attenuator to 55dB.

7 Set the attenuation [α] of the DUT attenuator to 0dB.

8 Set the averaging time of the DUT attenuator power meter to 1s.

9 Zero the reference and the attenuator power meter.

8163A