IBA ibaPQU-S, Manual

Page: 94 / 127

Manual ibaPQU-S
94
Issue 1.5
11.7 Example for FO budget calculation
As an example, an FO connection from an ibaFOB-io-Dexp card (FO transmitter) to an
ibaBM-PN device (FO receiver) is used.
The example refers to a point-to-point connection with an FO cable of type 62.5/125 µm.
The light wavelength used is 850 nm.
The range of the minimum and maximum values of the output power or receiver sensi-
tivity depends on the component and, among other things, on temperature and aging.
For the calculation, the specified output power of the transmitting device and on the other
side the specified sensitivity of the receiving device must be used in each case. You will
find the corresponding values in the respective device manual in the chapter "Technical
data" under "ibaNet interface".
Specification ibaFOB-io-Dexp:
Output power of FO transmitting interface
FO cable in µm Min. Max.
62.5/125 -16 dBm -9 dBm
Specification ibaBM-PN:
Sensitivity of FO receiving interface
FO cable in µm Min. Max.
62.5/125 -30 dBm
Specification FO cable
To be found in the data sheet of the fiber optic cable used:
FO cable 62.5/125 µm
Connector loss 0.5 dB connector
Cable attenuation at 850 nm wavelength 3.5 dB / km