EXFO FTB-635 Wideband Copper and DSL Test Module - Manual (Page 191)

Multimeter 2 Tests
Copper and xDSL Tests 183
Station Ground
The page displays the Station Ground pass/fail results and the following
measurement values:

Line Card Type displays one of the following messages:

Card Not Detected

Voltage Source

Current Source

Line Card Voltage Polarity displays either Ok or Reversed.

Station Voltage is the maximum/minimum AC/DC threshold voltage
value for the circuit.

Loop Current is the minimum loop current for the circuit in mA.

Loop Resistance displays the resistance value of the twisted cable
pair.

Station Ground Resistance from 0.0 to 25.0 ohms is considered a
pass.
If an error message is displayed in lieu of the resistance measurement, one
of the following conditions could exist:

Loop resistance > 10 k Ohms

Tip (A) not connected to Ground (Earth) at CO

Improper hookup (check your lead connections)

Incorrect/no line card

Improper line voltage, polarity, or current

Resistance measurement error (out of range for normal resistance
measurement, etc.).