Operator`s manual

164201257 C0 Page 36 6/13/2003
Preliminary
Lectro CPR
®
Operator’s Manual
4.5 Troubleshooting
Because it is impossible to account for every possible symptom and solution in a
CATV Network, the following troubleshooting suggestions should be used as a gen-
eral guideline. Refer to Figure 4.5-1
Table 4.5-1: Troubleshooting
External cabinet LED's not op- Bad or loose connection at the Check connections on the front
erating (one or both) comm unication m odule and rear of the comm unication
m odule and secure appropriately
Defective comm unication m odule Replace the comm unication
module
Defective LED or LED's Replace the bad LED or LED's
W eak battery string LED's not Bad or loose connections at the Check for proper connections at
operating comm unication m odule the comm unication module and
tighten as necessary
Bad or loose connections at the Check for proper connections at
batteries the batteries and tighten
Rem ote reported levels are not Bad or loose connections Check and tighten all con-
accurate nections
Defective comm unication m odule Replace comm unication m odule
Software conflicts Take readings on-site with a
true-RMS meter and compare
N o t re c e iv in g a n y in fo rm a tio n a t D e fe c tiv e tra n s
p
onder Replace transponder
the Head-End, NOC or etc…
Bad or loose connection between Check and tighten all connections
the transponder and the com -
m unication m odule (Level Two)
Bad or loose connection between Check and tighten all connections
the com m unication m odule and
the CPR power supply
Tx and Rx Frequencies of the Replace Com m unicator M odule
Com m unicator M odule and the W ith one that has the same
Headend controller do not match Tx and Rx Frequencies as the
Rest of the system .
Interference in forward or Verify com m unicator m odule works
reverse path caused by by connecting to its RS-232 port.
ingress, sheath currents, poor Investigate signal paths and noise
g ro u n d in g , e tc . le v e ls .