Chapter 5 Datacom Testing
Specifying test settings
SmartClass E1 Tester User’s Guide 57
If you selected Bit Programmable or Byte Programmable, proceed to
step 3. Otherwise, proceed to step 4.
3 Do one of the following:
– If you selected Bit Programmable, specify the bit pattern you want to
use.
– If you selected Byte Programmable, specify the byte pattern you want
to use.
4 If you need to specify other settings for the test, press Cancel to return to
the Configuration menu.
You have finished specifying the BERT pattern.
Specifying data parameters
The following sections describe how to specify the data rate, enable/disable
data loss detection, and specify the polarity for transmitted and received signal.
Specifying the data rate
The following procedure describes how to specify the data rate.
To specify the data rate
1 If you haven’t already done so, launch the Data Communication applica-
tion (see “Launching the datacom application” on page 52).
2 On the Configuration menu, select Data Rate (bps).
3 Enter a value, in Hz, for the data rate (see Table 8 for a list of supported
data rates for each interface).
You have finished specifying the data rate.
LUP 1TO7 A one followed by 7 zeroes. Stresses the minimum
ones density requirement for E1 circuits using AMI
coding. This pattern is used to test timing clock
recovery and can be transmitted framed and
unframed.
BIT PROGRAMMABLE Selects a user-defined pattern from 3 to 32 bits long.
BYTE PROGRAMMABLE Selects a user-defined pattern from 1 to 64 bytes
long.
Pattern Description
Table 8 Data rates by interface
Interface Synchronous Asynchronous
X.21 Balanced 50 Hz to 2.048 Hz
1
1. Can be up to 10 MHz, depending on the cable. See Table 5 on page 4 for more information.
N/A
RS-232/V.24 Unbalanced 50 Hz to 128,000 Hz 50 Hz to 128,000 Hz
EIA-530 Balanced 50 Hz to 10 MHz N/A
V.35 Balanced 50 Hz to 2.048 Hz N/A
RS-449/V.36 Balanced 50 Hz to 10 MHz N/A
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