8
www.versitron.com
2.7 INITIAL CHECKOUT PROCEDURE
The F22XX Modem contains no power on/off switch. Once properly installed and
powered, the unit is fully operational. The power indicator should remain on as long as power is
supplied to the unit.
Before beginning system operation, to ensure proper installation, verify that:
1. The power plug is seated fully into the Modem or seated firmly in the rack-mount chassis.
2. The fiber optic cable is crossed transmit to receive from unit one to unit two and vice versa.
3. The LOOP LED illuminates when a link is established to the remote optical receiver of the
F22XX. Note that the LOOP LED will illuminate regardless if there is data flowing to indicate a
valid link between the two modems over fiber optic cable.
4. The jumper settings for the circuit configuration are correct (e.g. non-inverted/inverted signal
polarity, clock selection, balanced/unbalanced outputs).
If a malfunction is detected during the initial checkout procedure, refer to Chapter 5 for
information on isolating the malfunction in the unit.
