Performing A Measurement; Power Measurement; Optical Link Loss - JDS Uniphase 2000 Platform User Manual

Chapter 5 Power meter, VFL (Visual Fault Locator) & Talkset
Using the Power meter
Performing a
measurement
Power
measurement
Optical link loss Setting the zero value of the power meter
30
Standard Reference Selects the current result as reference value to
Jumper Reference
The soft key Jumper Ref is displayed in grey and cannot be
activated if both power meter and Source are selected onto the
OTDR Module set into the Platform.
The power meter must be selected onto the Base-Unit, and the
Source onto the OTDR Module to activate the soft key and be
able to perform a reference measurement in loopback mode.
The power meter is started up as soon as the function
H
vated in the
OME
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.
1 Connect the light source to be tested to the rear connector (see
"Connection to the power meter, VFL and Talkset" page
S
2 In the menu, choose the units dBm, dB or Watts.
ETUP
S
3 Press the
TART
The result will appear in the results page and can be memorized in
the table (see "Table of results" page
S
4 Press the
TART
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.
1 Fix the plug over the optical input of the power meter so that no light
can reach the photodiode of the power meter. If the zero adjustment
is made without this plug, an error message may be displayed, as
the photodiode will detect too much light.
User Manual 790000002/00
measure the attenuation of a link. This reference
is displayed under the measurement result until a
new reference value is chosen.
This key can be pressed when a reference in
loopback mode must be performed (see 2100
Module Series User Manual).
menu.
/S
key to start the measurement
TOP
/S
key to stop the measurement.
TOP
26).
.
28).
is acti-