The following Resistance and Capacitance measurements are supported by the BX100A DMM option;
Resistance - v
erify that adequate isolation resistance exists between Tip-Ground (T-G) and Ring-Ground (R-G) when the
pair has an open at the far end. A loop resistance measurement can provide an estimate loop length if the pair is shorted at
the far end. ADSL loop resistance (tip-ring with a short at the far end) should not exceed 600 Ohms.
Capacitance -
a measurement will verify that a copper pair is balanced i.e. both the Tip and Ring leads are of equal
length. If one of the leads is longer than the other, this is indicative of a split pair which is common MDF wiring mistake.
DMM - Resistance measurement
DMM - Capacitance measurement
14.0 Common Functions
The following common functions are described in the
14.1 Auto Test
BX100A/V e-Manual D07-00-001 Rev E01
Page 49 of 52
