Network Cables User Manual

40
BRTS-100 ISDN TEST SET
Figure 5-7. AC impedance.
Figure 5-8. DC continuity.
100Ω
6
3
9V BATTERY
LOOP RESISTANCE
0 - APPROX. 5KΩ
MAX. AMOUNT 5mA
VDD
LOOP
DETECT
BRTS-100
DEVICE
UNDER
TEST
TA/NT
100Ω
3
6 SW1
ISPC
I.C.
R-SENSE
100Ω
PRE AMP
FILTER
HIGH DETECT
APPROX. 150 OHMS
WINDOW
COMPARATOR
SAMPLE
&
HOLD
STATUS
INDICATORS
21KHz
GEN
~ 1vpp
+
-
AC IMPEDANCE