Atec ISN-T8 User Manual
ISn t8
Impedance StabIlIzatIon network (ISn)
for unShIelded balanced paIrS
Impedance stabilization networks (ISN) are coupling/decoupling networks according to CISPR 22 (EN
55022) for measurement of conducted common mode disturbances of information technology equipment
(ITE). The ISN is placed between the equipment under test (EUT) and the auxiliary equipment (AE) or load
which is necessar y for the operation of the EUT. The ISN establishes the common mode termination
impedance seen by the telecommunication port during measurement.
The ISN T8 is designed for measurements on up to four unshielded single balanced pairs shown at D.3
(ISN with high longitudinal conversion loss (LCL) for use with one, two, three, or four unscreened bal-
anced pairs) in CISPR 22, Ed.5.2, 2006 and EN 55022 Sept. 2006 (IEC/CISPR 22: 2005 modied). The ISN
T8 consists of one basic network (ISN T800) with D-Sub-25- connectors and special adapter sets. A set of
adapters consists of two pieces of LCL adapters to arrange the lines and realize longitudinal conversion
loss (LCL)- requirements for the EUT-side in relation to the use cable category (cat.3, cat.5) and one piece
of connection adapter arranges the lines for the AE-side. Teseq offers two different adapter sets – ADS
T800 and ADS T8x0. ADS T800 gives the connection to R J45 sockets with pin-arrangements of EIA/TIA
T568A respectively T568B. The adapter set ADS T8x0 offers changeable pin-arrangements via 1 mm
banana connectors for each pin combination of RJ11 / RJ45.
For use with one, two, three, or four
unscreened balanced pairs
CISPR 22, Ed.5.2, 2006 and EN 55022
Sept. 2006 (IEC/CISPR 22: 2005
modified) for Cat.3 and Cat.5
1000BaseT and PoE application
Changeable pin-arrangements with
RJ11 and RJ45
Technical specifications
Frequency range: 150 kHz to 30 MHz
Line parameters: 1 up to 4 pair(s)
Power rating (EUT- and AE Port)
AC max. voltage (line to ground): 63 V
DC max. voltage (line to ground): 100 V
Current max : 400 mA (line), 800 mA (pair)
Test voltage: 200 VDC, 2 sec
Common mode impedance (EUT Port) 150 kHz to 30 MHz: 150 Ω ±20 Ω
Phase angle (EUT Port) 150 kHz to 30 MHz: 0° ±20°
Coupling path (In/Out-port/EUT)
Connection: BNC 50 Ω
RF voltage: <15 V
Frequency range: 150 kHz to 30 MHz
Voltage division factor (RF input to EUT port) 150 kHz to 30 MHz: 10 dB ±1 dB
Transmission bandwidth (wanted signal) EUT/AE B3 dB: * > 100 MHz sin.
LCL (EUT) *)
Cat. 3 150 kHz to 30 MHz: 55 dB to 39.3 dB ±3 dB
Cat. 5 150 kHz to 2 MHz: 65 dB ±3 dB
Cat. 5 2 MHz to 30 MHz: 65 dB to 49.3 dB +4.5/-3 dB
Decoupling of common mode disturbances (EUT / AE)
150 kHz to 1.5 MHz: ≥35 dB to ≥55 dB
1.5 MHz to 30 MHz: ≥55 dB
Crosstalk (PSELFEXT) (EUT / AE) 1 MHz to 100 MHz: ≥61 dB to ≥21 dB
*) all balanced parameters are in relation to a symmetrical load of 100 Ω
ISn t8
Impedance StabIlIzatIon network (ISn)
for unShIelded balanced paIrS
Mechanical specifications
Size (W x H x D) (basic network): 105 x 65 x 110 mm³
(basic net work with adaptors): 105 x 65 x 190 mm³
Weight: approx. 550 g
Application
Pin-arrangement for EIA /TIA T568B
Pair 1/ Pair 2/ Pair 3/ Pair 4/
Pin 4,5 Pin 1,2 Pin 3,6 Pin 7,8
Token ring, ISDN basic rate access / S0 RJ45 X X
ISDN primary rate access (2Mbps) RJ45 X X
10BaseT, 100BaseTX RJ45 X X
100BaseT4, 100Base VG-AnyLan, 1000BaseT RJ45 X X X X
ATM, FDDI, TP-PMD RJ45 X X
ISN T8 with adapter sets in suitcase
Dt. Telekom, UP0, AS400 RJ11 X
IBM 3270 RJ45 X
LCL adapter Cat.5
to 1 mm banana
LCL adapter Cat.3
to 1 mm banana
Teseq GmbH
Lands berger Str. 255 · 12623 Berlin · Germany
T + 49 30 56 59 88 35 F + 49 30 56 59 88 34
desales@teseq.com www.teseq.com
Adapter RJ11 to
1 mm banana
Adapter RJ45 to
1 mm banana
LCL adapter Cat.5 Basic net work ISN T800 Adapter RJ11 to
LCL adapter Cat.3 Adapter RJ45 to
Adapter RJ 45 for
arranging AE port
1 mm banana
1 mm banana
Adapter to 1 mm
banana for arranging AE port
82-248550 E02 Sept. 2007
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