Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL DS-562NC RFL Electronics Inc.
July 5, 2012 58 (973)
334-3100
3. Observe that zero errors are indicated on the receive side of the test set.
If an error count occurs, check all option selections and repeat steps 1 through 3.
If the error count persists, check the following:
a. Make sure the test set is correctly set up.
b. Make sure the test set cable is correctly connected.
c. Make sure the module under test is correctly installed.
d. Make sure the cable assembly is firmly and correctly connected.
If the error source is localized to the module or the cable assembly, return the
defective component to RFL for repair. If an error count persists after these steps
have been taken, check for an outside error source.
TROUBLESHOOTING
Use the following procedure to determine whether a problem is being caused by the RFL DS-562NC
or by some other part of the system.
1. If more than one module is on the same time slot, remove those modules that are known to be
good.
2. Perform a local loopback test, as described in steps 1 through 4 of the Loopback Testing
procedure.
3. If the loopback test indicates that the module is functioning properly, then check that the
terminal equipment is functioning properly. If so, then the test is complete. If not, then check
for an outside error source.
4. If errors appear to be occurring from the direction of the customer equipment to the DS-
562NC, verify that the data transitions are not occurring near the positive edge of the clock
when observing TXD (TP15) versus TXC (TP16) on the DS-562NC. If this is the case, place
TXICP (SW6-7) in the ON (UP) position, and check to see if the errors still persist. If they do
continue to occur, return TXICP (SW6-7) to the OFF (DOWN) position.
If errors appear to be occurring from the direction of the DS-562NC to the customer
equipment, verify on the customer’s external equipment that the data transitions are not
occurring near the positive edge of the clock when observing the data into the equipment
relative to the sampling clock. If this is the case, or if it cannot be verified, place RXICP
(SW6-5) in the ON (UP) position, and check to see if the errors still persist. If they do
continue to occur, return RXICP (SW6-5) to the OFF (DOWN) position.
5. If the error count persists, then swap modules. Replace the module with another that is known
to be functioning properly. If the replacement module is OK, then use the Repair/Return
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