Agilent Technologies 6002A Guia do Utilizador descarregar pdf (Página 235)

Test III. Attenuation Deadzone D Single-Mode/Multimode Module Performance Tests

E6000C Mini-OTDR User’s Guide, E0302

235

Test III. Attenuation Deadzone

NOTE The setup simulates a return loss of 35 dB. To care for the

fact that – due to the coupler – the light pulse travels

through the attenuator twice to sum up, the attenuator

needs to be set to a value 3 dB larger than the simulated

return loss, that is. 35 dB + 3 dB = 38 dB.

As this value includes the Insertion Loss of the

attenuator, you may need to determine the Insertion Loss

first.

Connect equipment 1 Connect the equipment as for the event deadzone test

(see Figure 78).

Settings 2 Turn on the OTDR, and after the self-test has passed,

recall the default settings and the resolution mode.

ETTINGS]<RECALL..><DEFAULT SETTING>

[Settings]<Optimize Mode><Resolution>

3 Set linestyle to SOLID.

IEW]<PREFERENCES><DOTTED LINE>: OFF

4 Set 2 pt. loss

NALYSIS]<2 PT.LOSS>

5 Make sure that the length unit is set to meters.

ONFIG]<LENGTH UNIT><METER [M]>

6 Set the Start and Span to 0.00–10.00 km.

ETTINGS]<RANGE><0-10 KM>

7 Either (Single-mode module)

Set the pulsewidth to 30 ns.

ETTINGS]<PULSEWIDTH><30 NS>. Close by OK.

1 2 ... 230 231 232 233 234 235 236 237 238 239 240 ... 319 320

Sem comentários

Agilent Technologies 6002A Guia do Utilizador Página 235