By pressing the
Measure Cable Performance
key, you can test Length/Delay, Impedance, Loop
Resistance, Capacitance, Impulse Noise and Peak-to-Peak Noise for coaxial cable. NEXT and
Attenuation are not supported for coaxial cable.
NOTE: The Injector is not used when testing coaxial cable.
Length/Delay Test Results
To display the
LENGTH/DELAY
screen, from the
Ready
screen, press
Jack (F4)
and set the Jack
to Coax. Then press the
Measure Cable Performance
key, then select
Length/Delay
.
During the Length/Delay test, the cable should be open or shorted.
If
NEF
(No End Found) is displayed next to the Length, it indicates that the cable is properly
terminated or the cable is too long.
The IEEE Length specification is 600 feet.
Press the
ESCAPE
key to exit.
Impedance Test Results
To display the
IMPEDANCE
screen, from the Ready screen, press
Jack (F4)
and set the Jack to
Coax. Then press the
Measure Cable Performance
key, then select
Impedance
.
During the Impedance test, the cable can be open, shorted or terminated. There is no preference.
If
UND
(Under range) is displayed, the cable is less than 40 feet long or the Impedance is less than
40 ohms.
If
OVR
(Over range) is displayed, the Impedance is greater than 200 ohms, the cable is less than
40 feet long, or the cable/pair is not connected.
The IEEE Impedance specification is 50 ohms, ±2 ohms.
Press the
ESCAPE
key to exit.
Loop Resistance Test Results
To display the
LOOP RESISTANCE
screen, from the
Ready
screen, press
Jack (F4)
and set the
Jack to Coax. Then press the
Measure Cable Performance
key, then select
Loop Resistance
.
During the Loop Resistance test, the cable should be terminated or shorted.
If
OVR
(Over range) is displayed, the Loop Resistance is greater than 10K ohms.
The IEEE Loop Resistance specification is 14.6 ohms.
Press the
ESCAPE
key to exit.
Capacitance Test Results
To display the
CAPACITANCE
screen, from the
Ready
screen, press
Jack (F4)
and set the Jack to
Coax. Then press the
Measure Cable Performance
key, then select
Capacitance
.
During the Capacitance test, the cable should be open.
