Anrtisu Site Master S331D - T1 Tester Mode Menus (Option 50)

T1 Tester Mode Menus (Option 50)
In T1 Tester mode (Option 50, S331D only), the FREQ/DIST and AMPLITUDE hard keys
are not used. Pressing the MEAS/DISP key in T1 Tester mode causes the soft keys, below,
to be displayed:
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BERT — Activates menus that are used Bit Error Rate Testing (BERT).
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Setup BERT — Activates menus that are used to set BERT testing op
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tions.
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Framing Mode — Selects the framing mode to be used.
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Auto — Automatically detects the received framing mode.
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D4 SF — Sets the T1 framing mode to Super Frame.
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ESF — Sets the T1 framing mode to Extended Super Frame.
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Back — Returns to the previous menu.
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Receive Input
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Terminate — Terminates the circuit under test with 100W. Termi
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nate mode is used to test out of service or newly installed T1 lines
when there is no traffic data.
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Bridged — Bridged mode provides greater than 1 kW impedance to
test the in-service line by bridging the receiver input across T1
lines.
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Monitor +20 dB — Monitor mode adds 20 dB of gain, and is used
when the connection to the circuit under test is through a 20 dB
pad. In the monitor mode the Site Master sensitivity is increased
by 20 dB to account for the resistive loss at the port, and is set for
100W nominal input impedance. In this mode the technician
should be careful not to disturb the signal by using the wrong con-
nector.
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Back — Returns to the previous menu.
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Pattern — Opens a list of available BERT patterns. Use the soft keys
or the Up/Down arrow key to highlight a pattern and press ENTER to
select.
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Line Coding — Selects the line coding to be used.
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B8ZS — Bipolar with eight-zero substitution. A T1 code in which
bipolar violations are deliberately inserted if the user data contains
a string of eight or more consecutive zeros. B8ZS is used to en
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sure a sufficient number of transitions to maintain system synchro
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nization.
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AMI — Alternate Mark Inversion. A bipolar signal in which ones
are encoded as pulses with alternating polarity, and zeros are en
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coded as zero amplitude.
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Back — Returns to the previous menu.
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More
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Clock Source — Selects the clock source.
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Internal — Uses the internal clock.
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External — The Site Master clock is synchronized with the re
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ceived signal clock.
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Back — Returns to the previous menu.
Chapter 2 Functions and Operations
2-63