Transmitter Module Setup Procedure - Cisco GS7000 Installation And Operation Manual

Appendix B
Enhanced Digital Return Multiplexing Applications

Transmitter Module Setup Procedure

Perform the following steps to set up the reverse transmitter module(s).
1 Open the housing according to Opening and Closing the Housing (on page 68).
2 Verify the level of the reverse path RF signal at the RF test points on the RF
module. Nominal level is +15 dBmV per channel. Install the appropriate value
input pad at the REV PORT IN PAD location to give the desired signal level into
the node.
3 Repeat step 3 for each RF cable carrying a reverse path signal.
4 Measure the transmitter module(s) optical output power.
5 Check the connection of the optical connector. Make sure the optical connector is
seated and verify fiber bend radius is greater than 1 inch.
EDR Transmitter Status Indicators
The transmitter module has two status indicator LEDs.
The following section describes the LED status and the correspondent indications.
The input level overdrive indicates the input signal level exceeds the limit of 35
dBmV.
For EDR 1:1 transmitter module
The following table lists the LED status and the indicated OPM, and the overdrive
status of the RF port.
Power (PWR) Laser (LSR)
OFF
Green
Green
Green
126
WARNING:
When handling optical fibers always follow laser safety precautions.
LED
OFF
Green Cisco Standard OPM Module
Orange
(Solid)
Cisco Standard OPM Module/
Orange
(Blink)
OPM Module
-
Non-Cisco Standard OPM
Module
Non-Cisco Standard OPM
Module
Indication
Port Input Overdrive
Yes
-
No
No