TEW5009 is specifically
designed to be used as an
isolation transformer in test
setups for testing Longitudinal
Balance and Return Loss in
Primary Rate and Basic Rate
Circuits.
Special attention has been given
to the problems associated with
the coupling capacitance
between windings when
transforming from balanced to
unbalanced circuits.
•Shield between windings.
•Very low Leakage
Inductance.
•Excellent balance.
Impedance Pri. (2-7)+(3-8) 100 ΩBal. Range, 75 - 150 Ω
Sec. (4-9) 100 ΩUnbal. “ ”
Frequency Response < 1.0 dB 1 KHz - 10 Mhz
Turns ratio (2-7):(3-8):(4-9) 1 : 1 : 2
Inductance (4-9) > 20 mH
Leakage Ind. < 2.0 µH
Wind. Res. Pri. (2-7)+(3-8) 1.92 Ω
Sec. (4-9) 0.97 Ω
Dielectric Strength 1500 Vrms
ISSUE: B 93/04/26 TEW5009
4
Unbal.
9
5
2
7
Bal.3
8
ALL DIMENSIONS
ARE IN INCHES
DRILL PATTERN
COMPONENT SIDE
2 HOLES DIA. 0.055"
10 HOLES DIA. 0.040"
GRID 0 .10" X 0.10"
G. 2 GND PINS
0.020" X 0.040"
DOT AT PIN1
DIA
0.025 0.020
8 PLACES
610
15
GG
L
0.15
H
W0.70
L 1.15" max.
W 1.00" max.
H 0.85" max
Dimensions
ELECTRICAL SPECIFICATIONS TEW5009
MECHANICAL
51
Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, 6-3
Tel: (613) 226-1626 Fax: (613) 226-7124
T1/CEPT/ISDN Test Transformer TEW5009
RR
R
R
R
Device
under
test
Figure 2: Test circuit for Return Loss
R
R
DEVICE
UNDER
TEST
Test Transformer
Figure 1: Test circuit for Longitudinal Balance.
TEW5009
TEW5009
Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, 6-4
Tel: (613) 226-1626 Fax: (613) 226-7124
T1/CEPT/ISDN Test Transformer TEW5009
