Com-Power ISN T8 User manual

Page 1 of 24
INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
INSTRUCTION MANUAL
for
IMPEDANCE STABILIZATION
NETWORK (ISN)
Model: ISN T8
150 kHz to 30 MHz

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INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
Table of Contents
1.0 Introduction........................................................................................................................... 4
2.0 ProductInformation ..............................................................................................................5
2.1 Overview ..................................................................................................................................... 5
2.2 StandardISNT8Items(included).............................................................................................. 5
2.3 AdditionalISNT8TestAccessories(optional).......................................................................... 5
2.4 ISNCalibrationKit....................................................................................................................... 6
2.5 OtherequipmentavailablefromCom‐Power........................................................................... 7
3.0 ProductSpecifications .......................................................................................................... 8
4.0 ProductImplementation ...................................................................................................... 9
4.1 ProductApplication.................................................................................................................... 9
4.1.1 WhencantheISNT8beused?...................................................................................................9
4.1.2 HowdoIchoosewhichLCLAdaptertouse?............................................................................ 9
4.1.3 WhatisLCL? ...............................................................................................................................10
4.2 ProductConnectionDetails ...................................................................................................... 11
Figure1–Equipmentsetupforstandardpinarrangements ..................................................... 11
Figure2–Equipmentsetupfornon‐standardpinarrangements.............................................. 11
4.2.1 ConnectorPin‐outs.................................................................................................................... 11
Figure3–ISNT8ConnectorPinArrangements/PairDesignations ............................................ 11
Figure4–RJ45LCLAdapterPinArrangements .........................................................................12
Figure5–RJ45ConnectingAdapterPinArrangements.............................................................12
Figure6–RJ11LCLAdapterPinArrangements ..........................................................................12
Figure7–RJ11ConnectingAdapterPinArrangements..............................................................12
Figure8–(8)1mmbananajackLCLAdapterPinArrangements...............................................12
Figure9–(8)1mmbananajackConnectingAdapterPinArrangements ..................................12
4.2.2 RJ45ConnectorWiring–Commonethernetcables ...............................................................13
Figure10–StandardPatchCable–ConnectorWiringDiagram ................................................13
Figure11–10/100Mb/sCross‐overCable–ConnectorWiringDiagram......................................13
Figure12–1Gb/sCross‐overCable–ConnectorWiringDiagram...............................................13
4.3 TestSetupDetails......................................................................................................................14
Figure13–AcceptableEquipmentArrangementsforTestSetup ............................................ 14
4.4 Measurement ............................................................................................................................15
4.4.1 WhatTypeofCoaxialCablingShouldBeUsedwiththeISNT8?............................................15
4.4.2 UseofAttenuatororTransientLimiterforInputProtection .................................................15
4.4.3 CorrectionFactors.....................................................................................................................17

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INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
5.0ImportantSafetyPrecautions .............................................................................................18
5.1 Maintenance ..............................................................................................................................18
5.2 EnvironmentalConditions.........................................................................................................18
6.0Warranty ..............................................................................................................................19
7.0 ISNTheory ............................................................................................................................20
Figure14–CircuitConceptofISNT8(CISPR22,FigureD.3) ......................................................20
8.0 TypicalPerformanceData ................................................................................................... 21
Figure15–TypicalAsymmetricImpedanceCharacteristics.......................................................21
Figure16–TypicalAsymmetricPhaseCharacteristics ...............................................................21
Figure17–TypicalLongitudinalConversionLoss(LCL)Characteristics(Cat.3) ........................ 22
Figure18–TypicalLongitudinalConversionLoss(LCL)Characteristics(Cat.5)........................ 22
Figure19–TypicalVoltageDivisionFactor(VDF)Characteristics............................................. 23
Figure20–TypicalIsolationCharacteristics.............................................................................. 23
Figure21–TypicalSymmetricInsertionLossCharacteristics.................................................... 24

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INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
1.0 Introduction
This manual includes product specifications, safety precautions, product
maintenance and warranty information. It also includes instructions for
connection of the ISN and associated accessories to the Equipment Under Test
(EUT) and Ancilliary Equipment (AE) and testing guidelines.
Information contained in this manual is the property of Com-Power Corporation.
It is issued with the understanding that none of the material may be reproduced
or copied without permission from Com-Power.

Page 5 of 24
INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
2.0 Product Information
2.1 Overview
The ISN T8 Impedance Stabilization Network (ISN) is designed based on the
circuit illustrated in Figure D.3 of CISPR 22. It is used for common mode
conducted disturbance measurements on telecommunication ports
intended for connection to Cat. 3 or Cat. 5 networks utilizing one, two,
three or four unshielded, balanced, twisted pairs.
2.2 Standard ISN T8 Items (included)
9RJ45 Adapter Set (wiring arrangement per ANSI/TIA/EIA-568-B)
Adapter Type Interface
Connector(s)
Wiring
Diagram Part Number
Cat. 3 LCL Adapter RJ45 Figure 4 ISN-LCL-CAT3-T8-RJ45
Cat. 5 LCL Adapter RJ45 Figure 4 ISN-LCL-CAT5-T8-RJ45
Connecting Adapter RJ45 Figure 5 ISN-ADA-T8-RJ45
9Instruction Manual
9Calibration data and Certificate traceable to NIST
(ISO 17025 accredited calibration also available)
2.3 Additional ISN T8 Test Accessories (optional)
9RJ11 Adapter Set (wiring arrangement per ANSI/TIA/EIA-568-B)
Adapter Type Interface
Connector(s)
Wiring
Diagram Part Number
Cat. 3 LCL Adapter RJ11 Figure 6 ISN-LCL-CAT3-T8-RJ11
Cat. 5 LCL Adapter RJ11 Figure 6 ISN-LCL-CAT5-T8-RJ11
Connecting Adapter RJ11 Figure 7 ISN-ADA-T8-RJ11
9(8x) 1mm Banana Jack Adapter Set (for non-standard pin arrangements)
Adapter Type Interface
Connector(s)
Wiring
Diagram Part Number
Cat. 3 LCL Adapter (8x)1mm banana Figure 8 ISN-LCL-CAT3-T8-1mm
Cat. 5 LCL Adapter (8x)1mm banana Figure 8 ISN-LCL-CAT5-T8-1mm
Connecting Adapter (8x)1mm banana Figure 9 ISN-ADA-T8-1mm
(4) UTP Adapter Cable RJ45 ISN-T8-CBL-1mm-RJ45
(2) Pair Adapter Cable RJ11 ISN-T8-CBL-1mm-RJ11

Page 6 of 24
INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
2.4 ISN Calibration Kit
Com-Power’s ISN Calibration Kit provides all of the needed calibration
adapters/accessories. Also provided are detailed, step-by-step
instructions to intuitively guide you through the calibration of the following
electrical parameters:
9Impedance - [asymmetric - common-mode]
9Phase [asymmetric - common-mode]
9Voltage Division Factor (VDF)
9Decoupling Attenuation (Isolation)
9Longitudinal Conversion Loss (LCL)
Generally, any of the folliowing combinations of test & measurement
equipment may be employed for the calibration:
Network Analyzer with [2-port] S-parameter capabilities
Spectrum Analyzer or EMI Receiver with Tracking Generator,
and Impedance Analyzer (or equivalent)
Spectrum Analyzer or EMI Receiver, Synthesized Signal Generator,
and Impedance Analyzer (or equivalent)
Gain-Phase Analyzer with Impedance measurement capabilities
The ISN calibration kit is available with the following items:
Part Description Part Number
Balance Transformer (LCL Probe) ISN-BT-T248
Balance Transformer Calibration Load Block ISN-CLB-BT
(2x) 10 dB Attenuators ATTN-10-T248
(2x) 150Ωto 50ΩAdapters ADA-515-T248
BNC Short Adapter ADA-0-BNC
BNC 50 ΩTerminator BNC-50-BNC
8 cm Twisted Pair with 1mm banana plugs ISN-CBL-1mm
(2x) RJ45 (or RJ11) Common Mode Adapter ISN-ADA-T248-RJxx
(4x) 1x100ΩPair Termination for LCL Adapter w/1mm ISN-100x1-T248-1mm
4x100ΩTermination Block for Conn. Adapter w/1mm ISN-100x4-T8-1mm
Adapters/Terminations for LCL measurement of individual pairs
Sin gle Pair
RJ 11 or RJ 45
Two Pairs
RJ 11 or RJ 45
Three or Four Pairs
RJ45
Part Number for
Pair Adapter or
100ΩAE Terminator
P1
100Ω P1 P2 100Ω P1 P2 P3 P4 100Ω
ISN-T2-xxx-RJyy X X
ISN-T4-xxx-RJyy X X X
ISN-T8-xxx-RJyy X X X X X

Page 7 of 24
INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
AntennasAntennaKits AbsorbingClamps Coupling/Decoupling
Networks(CDN)
CombGeneratorsCurrentProbes EmissionsTest
Systems
ConductedImmunity
TestSystems
ImpedanceStabilization
Networks(ISN)
LineImpedanceStabilization
Networks(LISN)
AntennaMasts Near‐Fiel
d

ProbeSets
PreamplifiersPowerAmplifiers
S
pectrumAnalyzers ProductSafetyTest
Equipment
TransientLimitersTurntablesAntennaTripods TelecomTest
Systems
2.5 Other equipment available from Com-Power
www.com-power.com

Page 8 of 24
INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
3.0 Product Specifications
Technical
Frequency Range: 150 kHz to 30 MHz
Compliant Standards: CISPR 16-1-2, CISPR 22, EN 55022
ISN Type: Figure D.3 of CISPR 22 / EN 55022
Impedance/Phase (EUT Port): 150Ω±20Ω/ 0° ±20°
Longitudinal Conversion Loss
ISN T8 w/Cat. 3 LCL Adapter: 55-10*log[1+(f/5)2] dB ±3 dB 150 kHz to 30 MHz
ISN T8 w/Cat. 5 LCL Adapter: 65-10*log[1+(f/5)2] dB ±3 dB 150 kHz to 2 MHz
where: -3 dB
f = frequency in MHz +4.5 dB 2 MHz to 30 MHz
Voltage Division Factor
(EUT Port to RF Port): 10.5 dB ±1 dB
Isolation (decoupling >35 dB @ 150 kHz
(AE Port to EUT Port): >55 dB @ 1.5 MHz
(increasing linearly with logarithm of
frequency from 150 kHz to 1.5 MHz)
>55 dB, 1.5 MHz to 30 MHz
Symmetric Insertion Loss
(AE Port to EUT Port):Max: 3 dB ±0.25 dB
Symmetric Load Impedance: 100Ω
Transmission Bandwidth: >100 MHz
Electrical
Max. Current Rating: 800 mA (per line), 1.6 A (per pair)
Max. Voltage Ratings: 50 VDC / 32 VAC (line to ground @ 50/60 Hz)
Mechanical
Total Conductors / (Pairs) 8 conductors / (4 unshielded twisted pairs)
RF & I/O Connectors
ISN T8 EUT/AE Port: DB-25 (female - non-metallic D-shell)
RF Port:
Coaxial BNC (female - 50Ω)
LCL Adapters ISN Port: DB-25 (male – metallic D-shell)
EUT Port:
RJ45 Jack (also available with RJ11 or (8) 1mm banana jacks)
ISN Port: DB-25 (male – metallic D-shell)
Connecting
Adapters EUT Port: RJ45 Jack (also available with RJ11 or (8) 1mm banana jacks)
Dimensions (L x W x H)
ISN T8: 6.5” x 4.125” x 3” (16.5 cm x 10.5 cm x 7.6 cm)
LCL & Connecting Adapters: 2.2” x 2.4” x 1.6” (5.6 cm x 6.1 cm x 4.1 cm)
Weight
ISN T8: 1 lb., 1.7 oz. (502 grams)
Cat. 3 LCL Adapters: 2.1 oz. (60 grams)
Cat. 5 LCL Adapters: 2.2 oz. (62 grams)
Connecting Adapters: 2 oz. (57 grams)
Environmental
Operating Temperature: 40°F to 104°F (5°C to 40°C) - INDOOR USE ONLY -

Page 9 of 24
INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
4.0 Product Implementation
The following sections contain useful information about your ISN T8. Guidance is
provided for; determining when use of an ISN is appropriate; how to use the ISN,
including application of correction factors. Also, detailed connection and wiring
diagrams are provided for proper connection of the Equipment Under Test (EUT)
and Accessory (or ancilliary) Equipment (AE) to the ISN.
Notwithstanding the information provided herein, the user is encouraged to refer
to the appropriate test specification and/or applicable test procedures for test
requirements, which hold precedence over any conflicting information provided
here. This information is provided for guidance purposes only, and may or may
not be appropriate for your specific test requirements, and may become
outdated or obsolete. The following information is based on a current
understanding of general test requirements, and may not be complete.
4.1 Product Application
4.1.1 When can the ISN T8 be used?
The ISN T8 is appropriate for measurements on unshielded lines
containing one, two, three or four balanced pairs, intended for
connection to Cat. 3 or Cat. 5 networks.
The user should ensure that the maximum ratings (voltage, current),
declared in Section 3 of this document, are not exceeded.
4.1.2 How do I choose which LCL Adapter to use?
The Cat. 3 LCL adapter simulates a network employing Cat. 3
compliant cabling, and the Cat. 5 LCL adapter simulates a network
employing Cat. 5 compliant cabling.
If the EUT is intended to be connected to Cat. 3 networks, then the
Cat. 3 LCL adapter should be used. If the EUT is intended to be
connected to Cat. 5 networks, then the Cat. 5 LCL adapter should
be used. If the EUT is intended to be connected to either network
category, then the test should be performed with the Cat. 3 LCL
adapter and again with the Cat. 5 adapter. The emission levels
measured using the Cat. 3 LCL adapter are likely to be slightly
higher than the emission levels measured using the Cat. 5 LCL
adapter.

Page 10 of 24
INSTRUCTION MANUAL
ISN T8 IMPEDANCE STABILIZATION NETWORK (ISN)

19121 El Toro Rd ●Silverado, California 92676 ●[phone] ●com-power.com
REV080515
The pin arrangements of the LCL/Connecting adapters equipped
with RJ45 and RJ11 jacks [ISN-LCL-CATx-T8-RJxx] are consistent with
the respective arrangements specified in ANSI/TIA/EIA-568-B, and
are illustrated in Section 4.2.1 of the present document.
For non-standard pin arrangements, use of the following
accessories is recommended:
LCL Adapter: P/N: ISN-LCL-CATx-T8-1mm
Connecting Adapter: P/N: ISN-LCL-CATx-T8-1mm
RJ45 Wiring Adapter: P/N: ISN-T8-CBL-1mm-RJ45
RJ11 Wiring Adapter: P/N: ISN-T4-CBL-1mm-RJ11
The LCL adapter connects to the EUT port of the ISN. The network
cable to be tested connects directly to the LCL adapter.
The connecting adapter connects to the AE port of the ISN. The
network cable which is connected to the accessory equipment
connects directly to the connecting adapter. See Figures 1 and 2
in Section 4.2.
4.1.3 What is LCL?
Longitudinal Conversion Loss (LCL) is an electrical parameter by
which the state of electrical balance is guaged, as it relates to the
physical geometry and the dielectric properties of a twisted pair of
conductors. A balanced transmission line (with respect to its
surroundings) is one whose two insulated conductors are perfectly
symmetrical, in that they are physically identical to one another in
diameter, concentricity, dielectric material, and are uniformly
twisted with equal length conductors
Specifically, LCL is the ratio between the [wanted] differential
voltage magnitude and the [unwanted] common-mode voltage
magnitude. The latter refers to the voltage quantity that has been
converted from differential mode to common-mode, occurring
due to [and in direct proportion to] the quantity or state of
imbalance which exists between the twisted pair conductors in the
cable.
The LCL of an ideally balanced transmission line is infinite; and,
conversely, the LCL of an ideal unbalanced transmission line (i.e.:
coaxial) is zero. The LCL for a Cat. 6 cable is 10 dB greater (more
balanced) than that of a Cat. 5 cable, which is 10 dB greater than
that of a Cat. 3 cable.