Chapter 4 E1 Testing
Specifying test application settings
34 SmartClass E1 Tester User’s Guide
If you selected User Bit Pattern or User Byte Pattern, proceed to step 4.
Otherwise, proceed to step 5.
All Ones Provides a fixed test pattern of all ones (AMI pulses).
It can be used as an AIS in unframed circuits, a keep
alive signal, or an idle code. This pattern is required
to accurately measure the E1 signal power in
dBnom.
All Zeros Provides a fixed test pattern of all ones. The Line
Code should be set for HDB3 when sending the All
Zeros pattern or the network will lose timing. This
pattern can be transmitted framed or unframed.
QBF The Quick Brown Fox message (all uppercase: THE
QUICK BROWN FOX JUMPS OVER THE LAZY
DOG 0123456789).
NOTE: For Datacom testing, this pattern is only avail-
able when testing in synchronous mode.
QBF1 The Quick Brown Fox message (see “QBF”) followed
by CR LF.
NOTE: This pattern is only available for Datacom
testing and when testing in asynchronous mode. The
QBF message is encoded according to the number
of data bits you specified in the character format.
QBF2 The Quick Brown Fox message (see “QBF”) followed
by LF CR LF CR.
NOTE: This pattern is only available for Datacom
testing and when testing in asynchronous mode. The
QBF message is encoded according to the number
of data bits you specified in the character format.
QBF3 The Quick Brown Fox message (see “QBF”) followed
by LF CR.
NOTE: This pattern is only available for Datacom
testing and when testing in asynchronous mode. The
QBF message is encoded according to the number
of data bits you specified in the character format.
1:1 A one followed by a zero, the minimum stress on
clock recovery circuits.
1:3 A one followed by 3 zeros.
1:4 A one followed by 4 zeros.
1:7 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.
Live Used in monitor mode to avoid false “errors” when
the monitored circuit contains live traffic rather than
BERT patterns.
User Bit Pattern Selects a user-defined pattern from 3 to 32 bits long.
User Byte Pattern Selects a user-defined pattern from 1 to 64 bytes
long.
Pattern Description
To Next Page
Loading...
