Viavi SmartOTDR 100, Руководство пользователя, Страница: 52 / 156

Chapter 5 Power meter & VFL (Visual Fault Locator)
Using the Power meter via USB port
34 User Manual 7SMART102 Rev002
On the results page, the following actions are available:
Standard Reference
Selects the current result as reference value to
measure the attenuation of a link. This reference is
displayed under the measurement result until a new
reference value is chosen.
Keep Result Saves the result on the corresponding line of the
table.
Clear Table Deletes all the results recorded in the table.
If the Source function is selected (either on this Platform, on the base
Unit or on an OTDR module, or on another Platform), the Power meter
results page is different:
– The Wavelength , Unit and Zero menu keys are accessible via the
menu key Power Config. .
– The Power Ref. menu key allows to reach the Standard Ref menu
key. It also allows to reach the Jumper Ref menu key if Power
meter function is associated with Source function onto another unit
(see OTDR Module User Manual).
Performing a
measurement
The power meter is started up as soon as the function is activated
in the H
OME
page.
Power
measurement
1 Connect the light source to be tested to the rear connector (see
"Connection to the power meter and VFL" page 24 ).
2 In the S
ETUP
menu, choose the units dBm, dB or Watts.
3 Press the
S
TART
/S
TOP
key to start the measurement
.
The result will appear in the results page and can be memorized in
the table (see
"Table of results" page 33 ).
4 Press the
S
TART
/S
TOP
key to stop the measurement.
Optical link loss Setting the zero value of the power meter
Power measurement is automatically updated in consequence. The
value «<-60 dB» is displayed when the laser is switched off and if the
source output is looped on to the power meter input.
It is important to set the zero of the power meter before making any
measurements where accuracy is required, as the noise from the ger-
manium photodiode fluctuates over time and with variations in tem-
perature.