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Tempo Fitness Sidekick 7B, Руководство по обучению

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Rev. 11/10/00

7

SideKick 7B

General Description

The Sidekick 7B is 

the

 test set used by every major telephone company in the

United States to troubleshoot twisted pair applications.  This lightweight, hand-
held meter quickly and accurately uncovers intermittent troubles that other test
sets cannot detect.  Since the introduction of the patented 

Stress

 test and 

Leakage

test in 1991, the Sidekick has become a benchmark in communications
technology.  Technicians now have the versatility to identify faults in locations
ranging from outside plant cable to inside wiring; and from closures to connecting
blocks without sacrificing standard features such as the AC/DC

, 

VOM, and Kick

Meter features they have come to rely on.  The versatile Sidekick 7B is used
throughout the telephony industry including; 

LAN/WAN

, Private Networks, and

BICSI

 applications.

The patented 

Stress

 test measures the audible noise produced on a faulted pair

when it is stressed as a result of a 90 dBrnC longitudinal excitation.  This test
determines the capacitive and series resistance balance characteristics of a twisted
pair at any point along the pair.  It is capable of identifying DC resistive or
capacitive imbalances undetected by other subscriber loop tests.  The 

Stress

 test is

also highly effective in identifying imbalances produced by series resistance opens
(high joints).

The 

Leakage

 test detects intermittent resistance faults that do not appear under

normal 

VOM

 tests.  When a faulted pair is taken out of service, galvanic action

forms an insulating oxide layer over the faults.  When returned to service, such
pairs develop "noisy static" in a relatively short period of time.  The 

Leakage

 test

uses 135 Volts DC to "punch through” the galvanic corrosion, thus revealing the
fault.

Features

•

 

Stress Test

•

 

Leakage Test

•

 

Volt-Ohmmeter

•

 

Kickmeter

•

 

Analog meter provides instant readout

•

 

Low battery warning indicator

•

 

Handset (buttset) terminals

•

 

Field replaceable test leads

•

 

Single hookup for Tip-to-Ring, Tip-to-Ground, and Ring-to-Ground testing

•

 

Minimal drying effect in all ranges

•

 

Simplex tone

•

 

Automatic shut-off

Содержание Sidekick 7B

Страница 1: ...Tempo Sidekick 7B and T N Training Course Revision 1 03 This manual is for training purposes only 7B Model T N Model...

Страница 2: ...d a highly trained and experienced technician place more emphasis on how paramount a thorough understanding of the following principles and analytical procedures are to Finding a better way to trouble...

Страница 3: ...ns 5 Shorts 5 Grounds 5 Resistance Faults 5 Noise 5 Line Imbalance 5 Crosses 6 Splits 6 Power Influence 6 Induction 6 Circuit Loss 6 Loop Current 6 SIDEKICK 7B 7 General Description 7 Features 7 Benef...

Страница 4: ...etect Test 32 Loop Current Test 33 Power Influence Test 34 Circuit Noise Test 34 Circuit Loss Test 35 QUIZ 4 37 EXAM 2 39 QUIZ EXAM ANSWERS 41 TROUBLE SHOOTING INSIDE WIRING 42 Testing for Good Ground...

Страница 5: ...d be determined from their capacitive discharge The practice of Kicking the pair was greatly enhanced by two of the Sidekick s most powerful troubleshooting features the Leakage Test and the patented...

Страница 6: ...used After approximately forty five hundred of these were produced the next generation of Sidekicks began to arrive the Sidekick 7B The Sidekick 7B In 1993 the Sidekick received a complete face lift...

Страница 7: ...ll Operational Center RBOC in 1998 and has become even more popular than the Sidekick 7B The VIP Sidekick In the early part of 2000 the Sidekick evolved into the Virtual Instrument Package VIP Sidekic...

Страница 8: ...gauge increases the diameter decreases and the resistive and capacitive characteristics of the wire to electrical flow increase Temperature humidity and other factors affect the properties of copper...

Страница 9: ...hms Law Ohms Law is a formula used to calculate voltage current and resistance when any two of these values are known The formula is expressed in three different variants depending upon which values a...

Страница 10: ...the result from a magnetic field that surrounds a wire when current flows through the wire The number of turns in the coil and the rate of the change of current through the coil determines the induct...

Страница 11: ...d connection Erroneous test readings may occur when a good ground is not present Verify that the test connections are good before starting a test Make sure the test lead clips are securely connected t...

Страница 12: ...divert onto another path The affect on service depends on the severity of the short A short can occur when other faults are present Grounds A ground usually takes current or a signal out of the loop i...

Страница 13: ...on from AC circuits and other telephone wires Induction from AC circuits usually imparts an audible hum on the line Cross talk is caused by the induction from other telephone lines In a well balanced...

Страница 14: ...ressed as a result of a 90 dBrnC longitudinal excitation This test determines the capacitive and series resistance balance characteristics of a twisted pair at any point along the pair It is capable o...

Страница 15: ...ce faults masked by galvanic corrosion measures resistance with mid scale red at 1 000 000 ohms performs capacitive Kick RX1K Measures resistance with mid scale red at 100 000 ohms performs capacitive...

Страница 16: ...three reasons 1 DC power is required to make a POTS line work 2 DC Volts indicates CO battery presence 3 DC should not be found on a Dry Vacant or Nonworking line Dry Vacant and Nonworking all mean t...

Страница 17: ...c 48 52 Vac 4 The red test lead is connected to the Ring wire in a pair and the black wire is connected to the Tip wire T F 5 To switch from AC Volts to DC Volts the Reverse switch is used T F 6 When...

Страница 18: ...the REV switch to the DOWN position b use the DC Volts test and hold the Tip switch UP c use the AC Volts test and hold the Tip switch UP d use the AC Volts test and hold the Ring switch UP 10 With th...

Страница 19: ...re connected and the line is balanced If the Tip or Ring test lead is disconnected during testing or the line is unbalanced the tone becomes audible and increases as line imbalance increases Nonworkin...

Страница 20: ...this test No damage to the test set will occur however readings will be incorrect 1 Turn the MODE SWITCH to the OFF position 2 Connect test leads Black Red and Green to Tip Ring and Ground 3 Turn the...

Страница 21: ...est Evaluation Scales to determine pair quality FEET FEET The following Noise Metallic readings as a general rule may be used as a guide to determine pair quality Stress Test Measured in dBrnC Scale 0...

Страница 22: ...ervice area The closer a pair is to or below the relative reading the better its performance When performing comparison testing a 10 dBrnC or greater difference between pairs indicates trouble on the...

Страница 23: ...is Questionable Cables As a cable deteriorates the Stressed Noise readings on all pairs will begin to rise To reduce repeat service calls use the pair with the lowest reading Equipment Balance The Str...

Страница 24: ...bscriber side instrument to RTU can be done without disabling or disconnecting the RTU Troubleshooting Tips The closer you are to the source of the trouble the higher the Stressed Noise readings will...

Страница 25: ...Rev 11 10 00 18 1 Trouble in C O 2 Trouble in F1 3 Trouble in F2 4 Trouble Isolation in F2 5 Trouble Hi Resistance Open in Drop 6 Trouble in F2 Beyond Sub...

Страница 26: ...tone to warn the customer of a test 3 The Stress test drives current through any series resistance on the pair T F 4 At the fault longitudinal current is converted into a a simplex tone b a metallic...

Страница 27: ...the Sidekick gets closer to the fault the readings on the meter when in the Stress test will a increase b decrease c fluctuate rapidly 10 In order for the Stress test s simplex tone to be inaudible t...

Страница 28: ...sition 2 Connect test leads Black Red and Green to Tip Ring and Ground 3 Verify that the REV SWITCH is toggled to the UP position 4 To test Tip to Ring turn the MODE SWITCH to LEAKAGE RX10K Then wait...

Страница 29: ...und NOTE The following Rx selections represent the resistance value in ohms on the meter s red scale A Rx 1 for meter readings up to 1 000 ohms B Rx 1K multiplies meter readings by 1 000 C Rx 10K mult...

Страница 30: ...qual kick should be observed Allow the meter to settle between kicks A very large kick indicates ringer presence 5 To kick Tip to Ground Hold the TIP SWITCH UP and toggle the REV SWITCH while observin...

Страница 31: ...side only the shorter side will produce an accurate reading For an accurate length measurement use an Open Locator Note Any Series Resistance at the fault will cause the distance to appear longer tha...

Страница 32: ...When reading the scale in the Leakage test the resistance reading should be multiplied by 10 000 to determine the Leakage value T F 5 Resistance values are read using the black scale on the Sidekick m...

Страница 33: ...or s a height b length c depth d gauge 9 When using the Sidekick as a Kick meter which meter scale is used a black b red 10 In the RX10K mode each point on the scale represents approximately what dist...

Страница 34: ...00 3 How many feet per point of Kick are shown when in the RX10K Leakage mode a 50 b 500 c 5 000 d 10 000 4 Which of the following test functions is used to measure the longitudinal balance of a pair...

Страница 35: ...0K mode a Red b Black 10 The REV switch is used to Kick the pair under test T F 11 Which of the following tests uses a 90dBrnC longitudinal signal a Resistance test b Stress test c Kick test d Loop Cu...

Страница 36: ...bove 17 Except for Inside wiring how much cable beyond the fault is needed on a single conductor fault to ensure a good reading a none b 10 000 feet c 5 000 feet d 1 000 feet 18 In the Stress test a g...

Страница 37: ...Current on working lines troubleshoots low Loop Current Holds connection on C O dial in lines when switching between Circuit Loss Circuit Noise and Power Influence tests Uses audible tone and automati...

Страница 38: ...fies up to four load coils on a pair Loop Current Measures a circuit s loop current read out is in milliamps mA on the meter s black scale PWR Influence Power Influence Measures the AC induction level...

Страница 39: ...re performing Coil Detection NOTE It is highly recommended that the CO battery be disconnected when using the Coil Detection feature Some CO battery and office connections can mask one or all coils fr...

Страница 40: ...decreases and as loop current increases resistance decreases Procedure 1 Turn the MODE SWITCH to OFF DIAL 2 Connect test leads Black Red and Green to Tip Ring and Ground 3 For Tip to Ring Turn the MO...

Страница 41: ...Power Influence levels Each black hash mark equals 2 dBrnC NOTE The Sidekick T N will hold line connection when switching between Power Influence and Circuit Noise Therefore switching to Circuit Noise...

Страница 42: ...30 dBrnC NOTE If Power Influence is greater than 60 dBrnC subtract Circuit Noise from Power Influence to obtain Circuit Balance Per Bellcore standards Specific company or local standards may be diffe...

Страница 43: ...he frequency generator test number sends slope sweep or selected frequencies leave the test set in the CKT LOSS position Each change in frequency will produce an audible tone that registers on the met...

Страница 44: ...s the amount of noise present a across Tip and Ring b from Tip to Ground c from Ring to Ground d from Sheath to Ground 4 An acceptable Circuit Noise level would be a 30 to 50 dBrnC b 0 to 20 dBrnC c 0...

Страница 45: ...below 20 mA b 20 23 mA c 23 mA and higher d None of the above 9 In the Load Coil test a needle dip from the far right to about 50 indicates that a load coil was detected T F 10 The maximum number of...

Страница 46: ...ick T N multicolored scale a in the blue zone b in the red zone c in the yellow zone d in the green zone 4 An acceptable Circuit Noise level would read a 0 to 30 dBrnC b 0 to 20 dBrnC c 20 to 30 dBrnC...

Страница 47: ...current is inversely proportional to resistance therefore as resistance increases the loop current measured on a pair a decreases b increases c remains constant d is not affected 10 With multiple load...

Страница 48: ...T 1 D 2 A 3 True 4 B 5 False 6 True 7 C 8 D 9 A 10 B 1 True 2 B 3 D 4 True 5 False 6 A 7 C 8 B 9 A 10 B 1 C 2 False 3 A 4 B 5 C 6 True 7 A 8 B 9 True 10 D 1 True 2 B 3 A 4 C 5 True 6 True 7 C 8 A 9 B...

Страница 49: ...ining Tip or Ring test lead 2 With the meter still in the STRESS TEST Mode determine the quality of the pair by comparing the meter reading on the black scale to the following Noise Metallic levels St...

Страница 50: ...check for old splices staples nails nicking loose connections worn insulation and any new construction Capacitance Testing Kicking the Pair 1 If Resistance Testing failed to detect any faults look for...

Страница 51: ...ulated portion of the ground wire 4 Back out the ground clip screw to provide sufficient clearance for the ground wire to wrap around the shank of the screw 5 Lay the wire between the open strain grip...

Страница 52: ...nch the test lead down and into the corresponding color marked binding post recess and channel 7 Place the flat washer then the lock washer on the test lead loop 8 Insert and tighten the set screw unt...

Страница 53: ...ember to conduct each segment of the Leakage Test for approximately 15 seconds Then run the Stress Test again Q The Stress Test reads 30dBrnC but the pair works fine Why A Check the other working pair...

Страница 54: ...e following tests in the following order AC volts DC volts Stress Leakage then return to Stress If these tests read good then the circuit is good If you are using a Sidekick T N you should run the Cir...

Страница 55: ...he heating and drying action repeat This repetitive process can continue as long as moisture is present in the cable Q Can I get a shock from the 135Vdc used in the Stress or Leakage Test A You might...

Страница 56: ...ong narrow jaws properly named Gharial clip ampere The standard measurement unit of electrical current flow amperage The amount of electrical current flow amplification The process by which the output...

Страница 57: ...nductive interconnecting device Caller ID on Call Waiting A service feature that delivers calling number and or calling name information for an incoming Call Waiting call capacitance The property of a...

Страница 58: ...of 90 dBrn as measured with a noise meter and weighted by a frequency function called C Message weighting dc or DC Direct current dc preferred Electrical current that flows in one direction dielectri...

Страница 59: ...usually expressed in micro or picofarads fault A condition that causes a device a component or an element to fail to perform in the required manner e g shorts opens etc fault tolerance The capability...

Страница 60: ...computers and peripherals in a limited area leakage A loss of energy when an electrical current travels to a path other than its intended one manhole A utility access hole large enough to provide acc...

Страница 61: ...le Early cable with paper insulated wires The insulation was formed directly from wood pulp pulse A short signal duration characterized by rapid amplitude change pulse TDR A Time Domain Reflectometer...

Страница 62: ...split When an input signal is distributed to several outputs Spit Pair A splicing error between two pairs of wire where the wire on one pair is connected to the wire of the other pair splitter A circu...

Страница 63: ...and or the ground from the CO battery token ring The use of a token to control access in a token ring network tone A single frequency audio signal usually used as a reference tone generator A device t...

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