TTC T-BERD 107A, Reference Manual

Page: 59 / 261

SECTION 3
3-20
INSTRUMENT
DESCRIPTION
3.3.2 Test Connections
The following top panel jacks are used at central
office or customer premises test locations (DSX-1
patch panel, distribution frame, NIU, or CSU) to
connect to the T1 circuit under test. These jacks can
also be used with the T-BERD T1 Repeater Extender
to access the T1 circuit at span repeaters.
RX Jack
9
This bantam jack receives the input signal. Use the
RX INPUT
switch to set the line termination for the
connection.
TX Jack
10
This bantam jack connects the T-BERD 107A trans-
mit output to the circuit under test. Use the
LBO
switch to set the output level. This connector also
provides the simplex current path to the RX jack.
REF Jack
11
This bantam jack provides a connection for a T1
reference clock input for use in timing slips measure-
ments. This jack provides a nominal 1000
Ω
termina-
tion and accepts resistively attenuated signals over
the range +6 to -24 dBdsx.
VF OUT Jack
12
This 600
Ω
bantam jack provides a DS0 or VF signal
output to an external TIMS or analog test set for
in-depth analysis.