Olson Technology SA6940-RT - Manual (Page 5)

025-370548 REV X1 Page 5
ALIGNMENT PROCEDURE
The SA6940-RT optical transmitter’s OMI has been optimized with an RF input level of +7.0dBmV per carrier (Six analog carriers)
maximum loading at the transmitters input. The Scientific Atlanta 6940 node has 8dB of loss between the ports and the optical
transmitter input when equipped with a 0dB reverse pad.
EXAMPLE: A reverse level of +18.0dBmV per carrier at the nodes ports will require a reverse pad of 3dB to get a +7.0dBmV level at
the transmitter.
+18.0dBmV node input minus the 3dB pad equals +15dBmV
+15dBmV minus 8dB node loss equals +7dBmV input level at the transmitter
Strap Location for RF Input from Bottom of Tx Strap Location for RF Input at Top of Tx
Figure 1 - Dual Olson SA6940 Transmitters in S.A. Node.
Figure 2 - RF Input Strap Locations