Specifications

Page 4–10
FOCUS System Manual
the status LED turns green within 20 seconds.
If the module is non-functional, the status
LED stays red, even after 20 seconds have
elapsed. This is the first acceptance test.
4. Connect a PC with the FCS installed.
Connect an RS-232 cable from a PC that has
the FOCUS Configuration Software (FCS)
installed to the RS-232 interface on the front
of the chassis’ Maintenance Module.
5. Start the FCS.
Bring up the FOCUS Configuration Software
(FCS), if it is not already running, by clicking
on the FCS program icon .
6. Bring the FOCUS chassis “on line”.
Click on the “Online” speed button
.
This uploads to the FCS the current status,
settings, operating statistics, etc., for the
FOCUS chassis — and the Optical
Transceiver Module.
7. Unlock the FOCUS chassis.
If the chassis is locked, execute the “Unlock
Configuration” command on the FCS Setup
menu or click on the “Unlock FOCUS
Chassis” speed button .
This puts the chassis — and the channel
modules — into a configurable state.
8. Connect a fiber optic power meter.
Connect a fiber optic power meter to the
XMIT OUT A connector on the Optical
Transceiver Module.
9. Check the transmit power.
Observe the “output” reading on the fiber
optic power meter. The level should be
between -5dBm and 0dBm.
Repeat Steps 8 and 9 for each transmitter on
both the main and auxiliary boards.
10. Connect a light source to a -20dB attenu-
ator.
Connect the output of an optical source to the
input of a -20dB attenuator that has either
fixed or variable attenuation. Set the light
source output to a maximum of -10dBm.
11. Connect the attenuator to the module.
Connect the -20 attenuator to the RCVR IN A
connector on the Optical Transceiver Module.
12. Check the receiver sensitivity.
Observe the low signal LED for RCVR IN A.
This LED (LSIG-A) should now go off to
indicate that it is receiving the signal.
13. Adjust the attenuator down to -35dBm.
Observe the low signal LED for RCVR IN A
(LSIG-A). It should remain off.
Repeat Steps 11–13 for each receiver on both
the main and auxiliary boards.
To test the Optical Transceiver Module’s hot
standby functionality, complete the following
steps:
This test applies only to the version of the Optical
Transceiver Module without the four-fiber hot
standby option.
1. Set up and energize the two chassis.
Set up and energize the two test chassis per
Steps 1–3 in the “Acceptance Test” section
earlier in this chapter.
2. Connect the two chassis with fiber optic
cables.
Connect the two test chassis using fiber optic
cables with couplers, as shown in Figure 4-5.
The following hot standby tests require two
FOCUS chassis connected to each other with
fiber optic cables.
NOTE