Fluke 125
Users Manual
A-10
COAX
COAX
COAX
PM9083
BB120
PASSIVE
TAP
PASSIVE
TAP
DEVICE 1 DEVICE 2
Ethernet Twisted pair/10BaseT
To check this bustype, ScopeMeter Channel A is on and
DC coupled. The recommended probe is VPS40 (10:1),
Channel A is on and DC coupled. The probe tip must be
connected to the TD+ or RD+ wire; the COM input (or
Black Ground Lead) to the TD– or RD– wire. Data traffic
is not always continuous.
TD+
RD+
TD-
RD-
OR
CABLE
The wires can be reached with Back Probe Pins TP88
(optional) at screw terminals at a device’s wire entry
point: for instance at a Junction Box. The right-hand
figure shows pinning and wire colors of a RJ-45
connector.
Pin 1: TD+ (brown)
Pin 2: TD- (brown/white)
Pin 3: RD+ (orange)
Pin 4
Pin 5
Pin 6: RD- (orange/white)
Pin 7
Pin 8
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