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Verfügbare Sprachen
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Length will be displayed in the selected units, either meters or feet, and the Vp and cable
testing standard will also be displayed. Length measurement accuracy depends on the
correct setting of the Vp (Velocity of Propagation) for the cable under test.
If the Vp is not known for a particular cable, then a known length of that cable (at least 60ft
or 20m long) may be connected to the instrument and the Vp adjusted until the correct
length reading is obtained (see § 4.3).
4.12
Tone Generator
The Wire Mapper Pro™ may also be used as a tone generator, to trace and identify cables
and wires. The user will need a cable tone tracer, such as the AEMC Cable Tone Tracer
(consult factory) or equivalent.
Structured Cable Tester
SERVICE / Vp
LENGTH / Vp
MAP /
C.A. 7028
FAULT MAPPER PRO
Pressing the
key will inject a warbling (oscillating) tone into the cable or link under test.
When set, the following will be displayed:
* * * * * * * * * * * * * * * * * * *
Warble Tone
* * * * * * * * * * * * * * * * * * *
The injected signal oscillates between 810Hz and 1110Hz, six times per second.
NOTE: The auto-off function is disabled in Tone Generator mode, so that the tone can be
injected into a cable for an extended period of time while tracing takes place.
4.13
Backlight
The display backlight is switched on and off with the
button.
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5. WIRE PROTOCOL
The following drawings are examples depicting cable faults:
CABLE OK
(OK)
Cable is good.
4
4
Pair 1
5
5
3
3
Pair 2
6
6
1
1
Pair 3
2
2
7
7
Pair 4
8
8
OPEN PAIR
(OP)
One specific pair is open. It may be one or two wires in the same pair.
One or more pairs may also be opened in the same cable.
4
4
Pair 1
5
5
3
3
Pair 2
6
6
1
1
Pair 3
2
2
7
7
Pair 4
8
8
SHORTED PAIR
(SH)
One specific pair is shorted.
4
4
Pair 1
5
5
3
3
Pair 2
6
6
1
1
Pair 3
2
2
7
7
Pair 4
8
8
Message: Cable OK
Message:
Open at Near End
or Remote End
Pin 1 2
Message:
Open at Remote End
or Near End
Pin 1 2
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