Sppm Production Maintenance

Front 1

AWG (American Wire Guage) =

The higher the # =

Back 1

Guage or diameter

The smaller the smaller the diameter, and vice versa

Front 2

The 3 types of shielding are ______, _______, and swerved. What are they used for?

Back 2

Braided - for live applications

Foil - permanent installs

Front 3

Shielding helps to reduce ______, and ______.

Back 3

(EMI) Electro Magnetic Interference

(RFI) Radio Frequency Interference

Front 4

Mic cable is often referred to as ______.

Back 4

2 Conductor Shielded (3 total conductors make up balanced cable).

Front 5

A cable's number of pairs equals its number of shielded or balanced channels for AES (American Electrical Standards?), what are they?

Back 5

3 - high, low, and ground - pairs

Front 6

Twisted Pairs =

Back 6

Noise Rejection

Front 7

Higher Cable Capacitance =

Back 7

Loss of high frequency (the lower the number, the better) - pf/ft

Front 8

Sex of Connectors:
Jack =
Plug =

Back 8

Jack = Female
Plug = Male

Front 9

HI/LO/GND TRS XLRpin ColorPerAES
HI = __ = __ = _____
LO = __ = __ = _____
GND = __ = __ = _____

Back 9

HI/LO/GND TRS XLRpin ColorPerAES
HI = Tip = Pin 2 = White
LO = Ring = Pin 3 = Black
GND = Sleeve = Pin 1 = Shield

Front 10

Solder used in this class is __/__ rosin core, which is composed of __% tin and __% lead.

Back 10

60/40 Rosin Core
60% Tin
40% Lead

Front 11

Rosin is a type of ____ and enhances the fusing of two __________.

Back 11

Flux
Conductors

Front 12

_______ is done to help keep an iron or conductor clean, and to aid in the ________ of ____.

Back 12

Tinning
Transfer of Heat

Front 13

Always pre-heat conductors so that no ____ ______ ______ occur.

Back 13

Cold Solder Joints

Front 14

Test cables and connectors for open circuits and _____ ________ with a continuity checker.
Open = ________ ____ (________ resistance)
Short = _____ _ ____

Back 14

Short Circuits
Open = Infinite (8 sideways) Ohms (Infinite Resistance)
Short = About 0 Ohms

Front 15

Desolder fused connections with a ____, ____, ____, or _________ ____.

Back 15

Wick, Bulb, Pump, or Desoldering Iron

Front 16

The typical wiring for unbalanced-to-balanced interface (i.e., RCA to XLR) is:
XLR pins (1, 2, 3) To RCA Solder Points (HOT or GND)
1 (Ground) To ___ (___)
2 (Hot) To ______ (______)
3 (Low) To ____ (___)

Back 16

Pin 1 (GND) To Sleeve (Ground)
Pin 2 (Hot) To Tip (High)
Pin 3 (Low) To Ring (Low)

Front 17

The best shielding for moving of "live" cable is _____.

Back 17

Rated

Front 18

During soldering, if the sponge is soaking wet, what happens?

Back 18

It cools the tip of the soldering gun off too much.

Front 19

Why would you tin?

Back 19

Makes string of wires 1 strand, less probability of shorts.

Front 20

What would cause soldered wires to pull out of the soldered contacts?

Back 20

Inexperience, Bad Connection

Front 21

What wire is thicker, 22 AWG or 20 AWG?

Back 21

20 AWG

Front 22

Which has less resistance, a 100-foot, 22-gauge cable, or a 100-foot, 20-gauge cable? Why?

Back 22

100-foot, 20-guage cable
It is a bigger gauge, with better flow (less resistance).

Front 23

What would you use to check a cable?

Back 23

Continuity Tester of a DMX

Front 24

If a mic cable has black, white, and ground wires, the black wire is typically soldered to the XLR pin # _ solder contact.

Back 24

3 (Black)

Front 25

Ground goes to pin #?

Back 25

1 (Ground)

Front 26

White goes to pin #?

Back 26

2 (White)

Front 27

DMM (_______ _____ _____) commonly used troubleshooting tool, measures _____, ____, _______, or ___ (______-in-the _______ _______)

Back 27

DMM (Digital Multi-Meter)
Volts, Ohms, Current, or HFE (Hybrid-in-the Forward Emitter)

Front 28

Continuity falls under ____.

Back 28

Ohms

Front 29

The most common troubleshooting involves testing for _____ (_) and ____ (_).

Back 29

Volts (V) and Ohms (Ohm Symbol)

Front 30

An open circuit = ________ ____ and has no current flow.

A short circuit is typically a _ ___ bypass.

Back 30

Open Circuit = Infinite Ohms no current flow.

Short Circuit = 0 Ohm Bypass

Front 31

Oscillators are circuits that create AC voltages at specific frequencies (sine, square, ramp, etc.). The waves generated have the following characteristics:
Shape = ____, ______, any different ____.
Frequency = ______ Per ______
Amplitude = _______ and/or ______

Back 31

Shape = Sine, Square, any different Wave
Frequency = Cycles Per Second
Amplitude = Voltage and/or Volume

Front 32

A Digital Multimeter (DMM) is commonly used to test:
___ - Probes are reversible. However, the typical DMM is not a true Vrms reading meter.
___ - Probe polarity is specific.
____ - Probes are reversible.
__________ - Beep test
_____ - Also can be used to test bipolar transistors, probe polarity matters.
_______ - Tested by breaking the circuit and putting the meter in the path of current flow.

Back 32

ACV - Probes are reversible.
DCV - Probe polarity is specific.
Ohms - Probes are reversible.
Continuity - Beep Test
Diode - Test Bipolar Transistors
Current - Tested by breaking the circuit

Front 33

_____________ (O-scopes):
Measure ____ and _______ (_ and _). ____ is displayed from left to right (the x-axis), and _______ is displayed vertically (the y-axis).
The main controls include:
_____ per ________ (_/___)
____ per ________ (_/___)
________ (__/____) positioning
__________ (____/_____) positioning
__/___/__:
Set to __ - will block out __ and display only __
Set to __ - will display both __ and __
Set to ___ - the point of _ _____
______ - set to highest amplitude CH1 or CH2 for a stable view.
Period - _/_________
Wavelength = _____ of _____/_________

Back 33

Oscilloscopes (O-scopes):
Measure Time and Voltage (T and V). Time is displayed from left to right (the x-axis), and voltage is displayed vertically (the y-axis).
The main controls include:
Volts per Division (V/DIV)
Time per Division (T/DIV)
Vertical (Up/Down) positioning
Horizontal (Left/Right) positioning
AC/GND/DC:
Set to AC - will block out DC and display only AC
Set to DC - will display both AC and DC
Set to GND - the point of 0 volts
SOURCE - set to highest amplitude CH1 or CH2 for a stable view
Period = 1/Frequency
Wavelength = Speed of Sound/Frequency

Front 34

Voltage Chart Pg. 27

Back 34

V

Front 35

6 Different Waveforms, name them.

Back 35

Sine Wave, Square Wave, Sawtooth Wave, Damped Sine Wave, Rectangular Wave, Triangle Wave

Front 36

The most common DMM tests are _____ and ____.

Back 36

Volts and Ohms

Front 37

LEARN EQUATIONS ON PG 35

Back 37

L

Front 38

Where would you use an oscillator?

Back 38

Console, troubleshooting, filter boxes

Front 39

List 3 things a DMM can measure.

Back 39

Ohms, Volts, and Amps

Front 40

A typical oscilloscope screen measures _____ in the vertical (y-axis).

A typical oscilloscope screen measures _____ in the horizontal (x-axis).

Back 40

Time (y-axis)

Volts (x-axis)

Front 41

When taking measurements from a standard 120V wall outlet, what voltage should you get between the following test points:
Neutral (ground) to earth (ground) = __ AC rms
Neutral to hot = ____ AC rms
Earth to hot = ____ AC rms

Back 41

Neutral (Ground) = 0V AC rms
Neutral to Hot = 120 V AC rms
Earth to Hot = 120 V AC rms

Front 42

Input - ____ ____ Transformer
Output - _____ _________ of gear
Passive Output - ___________
Active Output - __________

Back 42

Input - Step Down Transformer
Output - Match Impedence of Gear
Passive Output - Transformer
Active Output - Transistor

Front 43

Know that ______ _________ denotes a component that needs DC power (i.e., DCV to turn it on). What kind of power is DC?

Back 43

Active Component
DC = Steady Power

Front 44

Know how to find __ chip pin numbers:
The dot = Pin # _

Back 44

IC
1

Front 45

KNOW ALL COMPONENTS INFO ON PG 42, 66-69, AND 73 STUDY AND LEARN
REVIEW COLOR BANDS PG 71
REVIEW CHARTS ON PG 83-88

Back 45

K

Front 46

Normalling contacts are ______-____, ______-_____ switches used to route signal in special ways.

Back 46

Single-Pole, Single-Throw

Front 47

On DMX Connection the 2 pins that aren't always used are:

Back 47

4 and 5

Front 48

The proper way to wire Socapex and Edison connectors:
Green wire goes to _____ ______
White wire goes to _______
Black wire goes to ___

Back 48

Green = Earth Ground
White = Neutral
Black = Hot

Front 49

Review and know these terms:
Series Circuit -
Parallel Circuit -
Open Circuit -
Short Circuit -
Closed Circuit -
High Pass Filter (HPF) or Low Cut -
Low Pass Filter (LPF) -

Back 49

Series Circuit -
Parallel Circuit -
Open Circuit -
Short Circuit -
Closed Circuit -
High Pass Filter (HPF) or Low Cut -
Low Pass Filter (LPF) -

Front 50

Know also for test:
Cables -
Filter Box -
Patch Bay -

Back 50

Cables -
Filter Box -
Patch Bay -

Front 51

RC (Resistor Capacitor)
For Test Know:
High/Low Pass Filter by Diagram

Back 51

R

Front 52

Define:
Open -
Short -

Back 52

Open - Infinite Ohms, no I (Current) flow, open

Short - Current takes the path of least resistance, short 0 Ohms

Front 53

What happens when examining:
A series open and a parallel short -

A series short and a parallel open -

Back 53

Series Open & Parallel Short - Everything Should Stop Working

Series Short & Parallel Open - Everything Works

Front 54

PIERZ WAVOO
Letter StandsFor Units Meaning
P _____ _____ __
I _______ ____ ____
E ____ _____ _____ _____
R __________ ____ ________
Z _________ ____ ________ @ _______ ___________

Back 54

Letter StandsFor Units Meaning
P = Power = Watts = NA
I = Current = Amps = Flow
E = Electromotive Force = Volts = Force
R = Resistance = Ohms = Blockage
Z = Impedance = Ohms = Blockage @ Certain Frequencies

Front 55

How do you convert Watts to Amps? The easy way?

Back 55

Watts/120 = Amps
Easier Way (If in a hurry) - W/100

Front 56

Know that parallel voltage is ________.

Back 56

Constant - you will still have signal if something blows

Front 57

BE ABLE TO READ AND DISTINGUISH HPF & LPF RC FILTER PG 94
*WHEN TESTING CABLES, WRITE DOWN THE INFORMATION ABOUT THE CABLE
LEARN ALL MATH FORMULAS

Back 57

B

Front 58

a

Back 58

a

Front 59

a

Back 59

a

Front 60

a

Back 60

a

Front 61

How is Capacitance stated with regards to cable? What does it do to an audio signal?

Back 61

Measured in Piko Farrads
The lower the number the better, and the higher the number results in cutting frequencies.

Front 62

What is a "Normalling" contact with relation to patch bays?

Back 62

Normalling Contacts are Single Pole, Single Throw Switches used to route signal in special ways

Front 63

Which patch bay wiring methods use/don't use normalling contacts?

Back 63

Half Normal and Full Normal

Front 64

What types of shielding is for live cabling, and permanent installs?

Back 64

Live - Braided

Foil - Permanent

Front 65

What applications are DMX used in?

Back 65

Lights

Front 66

Which pins are not always used on a DMX connector?

Back 66

19

Front 67

What is the wiring colors/configurations for Socapex and Edison connectors? (same for both)

Back 67

Green - Ground
Black - High
White - Low

Front 68

What is another name for a High Pass Filter?

Back 68

Low Cut Filter

Front 69

What are the differences between Series and Parallel wiring, and in what system should voltage be constant?

Back 69

Parallel - Constant, Circuit path splits

Series - Circuit path does not split

Front 70

What is an easy way to convert Watts into Amps?

Back 70

W/100

Front 71

What is the leg names of FET (Field Effect Transistor) and Bipolar transistors?

Back 71

FET(Field Effect Transistor) - Source, Gate, and Drain

Bipolar - Transistor, Emitter, Base, and Collector

Front 72

What is the "turn on" voltage, and the max current of a small signal Silicon Diode?

Back 72

Turn On Voltage - 0.6Vdc

Max Current - 100mA

Front 73

What are the names of Digital Gates?

Back 73

and, nan, or, nor, exor, xnor, inverter

Front 74

How many Ohms should a good fuse be?

Back 74

0 Ohms

Front 75

What are the 2 types of Transistors?

Back 75

FET and Bipolar

Front 76

Study Exam #1 Study Guide

Back 76

a

Front 77

What is the difference between the terms Open and Short with regards to Ohms value?

Back 77

Open - Infinite Ohms

Short - 0 Ohms

Front 78

What is Ohms a measurement of?

Back 78

Resistance

Front 79

What does "EMI" and "RFI" stand for, and how do we deal with it?

Back 79

EMI - Electro Magnetic Interference

RFI - Radio Frequency Interference

Front 80

How does the AWG (American Wire Gauge) system work?

Back 80

The lower the number the bigger it is

Front 81

How do you wire balanced to unbalanced systems?

Back 81

tie low to ground

Front 82

What types of shielding are used for live and permanent installs?

Back 82

Foil

Front 83

What type of solder do we use in lab?

Back 83

60/40 Rosin Core

Front 84

What is the definition of Tinning with regards to the soldering iron tip?

Back 84

Melting solder on the tip to aid in the transfer of heat

Front 85

How are the XLR pin numbers, and TS/TRS configured (Per AES)?

Back 85

1 - Ground - Sleave
2 - High - Tip
3 - Low - Ring

Front 86

What are the methods for de-soldering?

Back 86

a

Front 87

What do Oscillators and Oscilloscope do?

Back 87

Oscillator - Sends out Votage at a certain frequency

Oscilloscope - Measures Volts

Front 88

What is the difference between VPP (Volts Peak to Peak) and VP (Volts Peak)?

Back 88

VPP - from the bottom of the rarefaction to the top of the compression

VP - Half of VPP

Front 89

What type of voltage comes out of the wall receptacles?

Back 89

AC

Front 90

Approximately how many volts should there be between "Neutral" and "Earth" in a wall receptacle?

Back 90

0

Front 91

What type of signal flows through audio cables?

Back 91

a

Front 92

What are the 2 most common troubleshooting tests?

Back 92

Checking/measuring Volts and Ohms

Front 93

What does "PIERZ-WAVOO" mean, and how do we relate them?

Back 93

a

Front 94

What are the PCB (Printed Circuit Board) letters for components?

Back 94

a

Front 95

What enhances the fusing of 2 conductors?

Back 95

Flux

Front 96

What would you use to clean "Flux" off of circuit boards?

Back 96

Alcohol

Front 97

What is the difference between Active and Passive components?

Back 97

Active - Needs DC to operate

Passive - doesn't need power