EDM 01-11v8 DAG 6.1S Card User Guide
©2005
7
Version 8: May 2006
3.0 SETTING DAG 6.1S CARD OPTICAL POWER
Description
The optical power range depends on the particular device fitted on the
DAG 6.1S card.
The DAG 6.1S card is shipped fitted with the GTRAN GT10-RXU
1310nm single mode receive module by default.
Optical power
measure
Optical power is measured in dBm – decibels relative to 1 mW where 10
dB is equivalent to a factor of 10 in power.
The numbers are all negative, showing powers below 1 mW. The most
sensitive devices can work down to about –30 dBm, or 1 uW.
Configuration
The following table describes the DAG 6.1S card optics power module
configuration.
Part No.
Fibre
Data Rate Max Power
[dBm]
Min Power
[dBm]
Nominal Pwr
[dBm]
GT10-RXU
SMF
10Gbps
0
-17
-9
In this chapter
This chapter covers the following sections of information.
•
Interpreting DAG 6.1S Card LED Status
•
DAG 6.1S Card LED Display Functions
3.1 DAG 6.1S Card Optical Power Input
Description
The optical power input into the DAG 6.1S card must be within a
receiver’s dynamic range.
When optical power is slightly out of range an increased bit error rate is
experienced. If power is well out of range the system cannot lock onto the
SONET frames. In extreme cases of being out range excess power will
damage a receiver.
When power is above the upper limit the optical receiver saturates and
fails to function. When power is below the lower limit the bit error rate
increases until the device is unable to obtain lock and fails.
Continued on next page
