Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split Installation Guide

 

4015678 Rev B 

37

 

 

ON ON  ON 

OFF 

OFF 

Constant Fast Flash 
(approx. 2 or3 times/second) 

OFF 

ON 

Double Flash/Pause Sequence 
(2 flashes/second, then 1 
second pause, repeat) 

OFF 

ON 

Constant Slow Flash 
(approx. once/second) 

ON OFF  ON 

 

 

If the SM is in the "No Freq Found" state, it is not receiving a downstream carrier 
from the headend controller.  This is probably because the SM is in the frequency 
scanning mode and has not found a downstream carrier. 

Complete the following steps to troubleshoot this condition. 
1  Connect the Model 91200 Handheld Programming Terminal to the local control 

port on the SM.  Refer to Manually Assisting SM Configuration/Registration 
Using the Model 91200 Handheld Programming Terminal (on page 28) for 
instructions. 

2  Use menu item 3 - RX FREQUENCY to set the downstream frequency on which 

the transponder receives commands from the headend.  The SM should lock on 
the carrier within 30 seconds. 
OR 
Wait for the SM to find the carrier.  This can take up to 24 hours, but commonly 
takes only one to two hours. 

3  Use a spectrum analyzer and check for a downstream carrier at the receiver test 

point.  If no carrier is found then check the output of the headend controller.  
Verify the cabling from the headend controller to the SM. 

 

If the SM is in the "Channel Description" state then: 

  

It is receiving a downstream carrier and is decoding the message. 

  

If the correct messages were received, it knows what reverse frequency it should 
use to transmit data back to the headend controller.