CDC 2E2X5X Vol 2

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Where are the explicit operating instructions for test equipment. and which TO tells you where to find further information?: Applicable technical orders; 0-1-33-1.
Repair and calibration of test equipment is the responsibility of whom?: Test measurement and diagnostic support center.
When can a shop stadard be used for routine maintance functions?: If an emergency condition exists and like test equipment is inoperative.
To eliminate moisture, most complex items of electronic test equipment uses what?: Built in heaters.
Which test equipment is most likley to be tropicalized and fungus proofed?: Laminated circuit board.
What is normally not effected by storing test equipment accessories improperly?: Maintenance procedures.
Of what should you be aware of when taking voltage measurements?: A voltometer of low sensitivity used in low range may render a ciruit inoperable.
Before measuring a resistance, you must sometimes usolder one side of a resistor in order to prevent what?: Erroneous readings.
In troubleshooting equipment, which measurements are not commonly taken?: Fequency and waveform
What is the problem in measuring current whith a multimenter with handheld probes?: High risk of electrical shock.
Which test set can you use to check the frequency of a test set?: Frequency counter.
Name the three main troubleshooting aids?: 1. Checkout and alignment procedures.
2. Fault indicators
3. Flow charts
What is the most important step in the troubleshooting effort?: Think before you act.
In the established general troubleshooting procedures, steps 1 through 4 are used in?: Locating the trouble.
What are functional inspections?: Inspections done through periodic tests.
It's important to document periodic maintenace inspections because they reveal what?: Slow progressive drifts that may be too small to show up on one test.
What troubleshooting technique would be used to isolate a circuit card or modular failure?: Internal diagnostic checks.
What type of tests would you do to isolate a defective component?: Resistance, voltage, and waveform measurments/comparisons.
The resistance values provided in most TO resistance charts are normally measured where?: Between two indicated points.
What saftey practices must be observed before making resistance checks?: Ensure the power is turned off and discharge all filter capacitors.
Regaurdless of the size of a circuit you are troubleshooting, you can immediately isolate the defective half of the unit by which troubleshooting method?: Half-split method.
Which analog multimeter control do you use for AC/DC voltages. current, and resistance measurements?: Function switch.
Which control on the analog multimeter calibrates the meter's pointer to zero for a resistance measurement?: Zero ohms switch.
Which analog multimeter control must you depress to remove an overload condition and return the meter to its normal operation?: Reset button.
When you make a resistance measurement, how do you electrically isolate a resistor from the circuit?: Disconnect one side of the resistor.
How do you place multimeter test leads in a circuit to measure voltage?: Parallel.
In which type of circuit would you measure the AC component of an output voltage where both AC and DC voltages exist?: Amplifier.
Which feature of the Fluke 8025A's multimeter do you use to select various measurement functions?: Rotary switch.
Which part of the Fluke 8025A's display section indicates the absolute value of the input?: Analog bar graph.
Which feature of the Fluke 8025A locks the measurement into the display for viewing and automatically updates the display when you take a new measurement?: Touch-hold push button.
When you use the Fluke 8025A, which voltage range do you need to select to measure 50 volts DC?: Volts DC.
Which current range on the Fluke 8025A do you select to measure 250 milliamps AC?: Milliamps/amp AC.
Which Fluke 8025A multimeter function displays "OL" with the leads connected in one direction while reversing them produces an audible tone?: Diode test.
How are voltage, time, and depth represented on the oscilloscope display?: Voltage = vertical axis, time = horizontal axis, and depth = intinsity.
Which mode of triggering an oscilloscope causes a trace to be drawn on the screen at all times, whether or not there is an input signal?: Auto.
Which triggering source would be used to look for power line hum?: Line.
Which control should you adjust if the display is too tall (extends off screen)?: Volts/cm
Which oscilloscope probe is essentially just a shielded pieces of wire?: Passive 1:1 probe
Which probe lets you use the oscilloscope to measure high voltage level, raises the input impedance, does not require bias voltage, and attenuates noise?: Passive divider, 10:1 probe
Which probe does not need to actually make contact with the circuit under test?: Current probe
In what situation is probe compensation not necessary?: Any time you have changed test points
Rise time is measured between?: 10- and 90- percent amplitude points on the leading or trailing edge of the pulse.
If the wave signal's positive alternation covers 2.5 time divisions and the TIME/DIV is set to 20nS, what is the signals frequency?: 10MHz
In using an oscilloscope to compare two signals, if the Lissajous pattern has 3 bumps on the axis and 4 on the other are the signals the same?: No, the signals have different frequencies
What digital storage oscilloscope circuit compensates for high sampling rates of high frequency signals?: Charged coupled devices
Sampled data points are stored in the memory of a digital storage oscilloscope as?: Waveform points
What area of a digital storage oscilloscope takes digitized samples and performes numerous manipulations on the data?: Microprocessor
What type of sampling does a digital storage oscilloscope normally use on single-shot or seldom occuring signals?: Real-time
What type of interpolation does a digital storage oscilloscope use to measure pulse waves?: Linear
What are the three types of digital storage oscilloscope acquisition modes, and which is the standard operation mode?: Sample, peak detect, averaging; sample.
Which digital storage oscilloscope button controls all waveforms displayed in the STORE mode?: CURSORS control
In aquiring a 4K record length on a digital storage oscilloscope, how many samples can you view at a time?: 1,000
What is the purpose of the bit error rate test set?: To provide an error detection system to determine the quality of recieved data.
The internal clock gererator has a major roll of what test?: The bit error rate test.
What test equipment item provides a patterned digital test signal for loop data quality?: BERTS
Which pattern simulator section of a bit error rate test set controls the clock selector and selects either the external clock or the internal clock for processing?: Data/clock select encoder
What pattern simulator section of the bit error rate test accepts a 48-bit parallel word and generates a serial pattern?: 48-bit transmitter only.
What pattern synchonizer and error counter section of the bit error rate test set internally generates its own pattern to compare with the recieved data from the data/clock recievers?: PRN pattern synchronizer/comparator
In the internal clock generator section of a typical bit error rate test set, what generates the basic clock that provides all clock phases, and is periodically frequency calibrated by a crystal controlled oscillator in the automatic calibration section?: VCO
What pattern simulator section of the bit error rate test set converts the NRZ-L data into the desired coding, such as NRM-M?: Code converter
What are the primary means of measuring the quality of transmitted digital information, and how is it derived?: Bit error rate (BER), the ratio of the number of bits in error to toatal number of bits transmitted.
What is the first step in the basic bit error rate testing procedure?: A known bit pattern, usually pseudo-random, is generated at the sending end of the data channel or equipment under test and is transmitted through the channel.
Durring a basic bit error rate testing procedure, an error signal is generated when?: Any bit in the recieved signal is not the same as the generated bit.
The primary use of a signal generator is to?: Align frequency sensitive or tuned circuits.
What is the frequency range of an audio signal generator?: 20Hz to 20 kHz
What componets make up the frequency determining device in a signal generator, and which of these elements is usually chosen as the variable element?: A resistor and capacitor (RC circuit) with the capacitor as the variable element.
A radio frequecy generator is used to?: Align telementry receivers.
What is the variable voltage range of signals output from the HP 3325B synthesizer/function generator?: 1 mV to 10 V peak-to-peak.
The output of the HP 3325B function generator may generate only DC voltages, to a maximum of?: +-5 V
In using the phase modulation controls of the HP 3325B generator, an input of a +- 5 V peak would result in what approximate phase deviation?: +-425 deg. per volt for square wave.
The 10:1 power ratio represented by 1 bel can also be represented by how may decibeels?: 10 dB
A power reading that uses the abbreviation dBm indicates?: The ratio of decibels relative to a 1 milliwatt standard.
The measurable frequency and power ranges of the HP 436A power meter are determined by?: The power sensor.
The most efficient power sensor for converting RF energy to the DC voltage measured by the HP 436A power meter is?: The detecting diode
When you connect a new or different power sensor to the HP 436A power meter, you should?: Immediately calibrate the units together.
Which triggering on a spectrum analyzer do you select to run the sweep only once after triggering, with a READY light indication each time it is run?: Single
Which triggering on a spectrum analyzer lets the sweep be triggered by an AC power source at a rate equal to the frequency of the power source?: LINE
Besides the per division mode, what are the other two scan modes available through the FREQUENCY SPAN/DIV ccontrol on a spectrum analyzer?: Maximum and 0Hz
Which spectrum analyzer control selects the maximum input level of the analyzer and reduces input signals to an optimum level?: MIN RF ATTEN dB.
Which electronic counter measurement represents the average bit-to-bit time of an input signal?: Period
Which electronic counter measurement counts the number of bits in a pulse train?: Totalized
A time domain reflectometer will not detect cable ______.: Ground
What principal does the time domain reflectometer use to test cables?: Radar
What type of deflection return on the TDR CRT wouldd indicate a cable "short"?: Negative "pip"
What do we call the power that is reflected back?: Backscatter
How is signal loss represented in on optical time domain reflectometer display?: Decibels
Which mode is first used to analyze the fibre after fibre insertion?: REAL-TIME mode
When will the pattern synchronizer and error counter error/IN SYNC section of the bit error rate test set provides an output to the front panel display, and what interrupts this output?: At the end of the count cycle or when the reset switch is pushed, read/enter pulse.

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