Patton electronic NetLink-E1 2715 user manual BIT Error Rate V.52 Diagnostics, 511, 2047, Qrss

To perform an RDL test, follow these steps:

1.Activate RDL. This may be done in two ways:

a.Enter b Remote Loop from the System Diagnostics/Statistics menu and toggle the <Spacebar> until “TM” appears next to the b Remote Loop option.;

b.Activate the “RL” signal on the DTE. If you are not sure which lead is the “RL” signal, please refer to Appendix D.

2.Perform a bit error rate test (BERT) using the internal V.52 generator (as described in Section 5.3), or using a separate BER Tester. If the BER test indicates a fault, and the Local Line Loopback test was successful for both NetLink™s, you may have a problem with the twisted pair line connection.

5.3 BIT ERROR RATE (V.52) DIAGNOSTICS

The Model 2715 offers three V.52 Bit Error Rate (BER) test pat- terns. These test patterns may be invoked along with the LAL and RDL tests to evaluate the unit(s) and the communication links.

When a 511, 2047, or QRSS test is invoked, the Model 2715 gen- erates a pseudo-random bit pattern of 511 bits, 2047 bits or 220 bits, respectively, using a mathematical polynomial. The receiving NetLink- E1™ then decodes the received bits using the same polynomial. If the received bits match the agreed upon pseudo-random pattern, then the Model 2715(s) and the communication link(s) are functioning properly.

511	Initiates a built-in 511 bit pseudo-random
	pattern generator and detector.
2047	Initiates a built-in 2047 bit pseudo-random
	pattern generator and detector.
QRSS	Initiates a built-in 220 bit pseudo-random
	pattern generator and detector.

To perform a V.52 test, follow these steps:

1.Activate the local loopback or remote loopback diagnostic.

2.Activate the test pattern. This may be done in one of two ways:

a. Enter e Selected Pattern from the System Diagnostics/Statistics menu and toggle the <Spacebar> until the desired test pattern appears.

b.Enter c Test Pattern and toggle the <Spacebar> to send the selected pattern.

c.One of two result codes will appear to the right of the c Test Pattern listing:

OK Indicates that the received test pattern is error-free.

BE Indicates that there are errors in the test pattern (to deliberately insert errors in the pattern, toggle

dError Insertion to ON).

31 32