Test Equipment - TM-11-5895-878-14-P0074

TM 11-5895-878-14&P

Type measurement

Scale range

miscellaneous panel of a test bay. For monitoring

Dc volts

Iv to 1,000v

purposes, either of these two inputs may be patched via

Ac volts

Iv to 750v (50 Hz to 20 KHz)

interbay trunk jacks to the MON (Monitor) jacks in the

Dc current

100 to 1,000ma

VF circuit patch panels without degradation or

Ac current

100 to 1,000ma (50 Hz to 5 KHz)

interruption of circuit operation.

Dc resistance 0 ohm to 10 Meg ohm

f. Oscilloscopes. The oscilloscopes provide dual

c. Telegraph Carrier TestSetKS-19935.

This

visual displays of electrical signals and parameters.

model of the KS-19935 consists of Control Unit L5 and

Plug-in units provide wide ranges of measurement

Electronics S Unit L1. The test set measures the level

capability.

and frequency (steady-state) of the tones used in

g. Video Waveform Monitor 1485R (fig. 1-3). The

telegraph carrier and low speed data systems.

Tektronix 1485R Video Waveform Monitor is a

(1) AC level Meter. The Test Set allows

specialized oscilloscope with triggering and vertical

selection and level measurement of any individual

characteristics designed for accurate measurement of

channel of a standard multiplex carrier system where a

the composite video signal. The monitors' vertical

normal signal level of 0, - 10, - 17, or -26dBm (single-

amplifiers have very carefully controlled responses

width) or +3, -7, -14, or -23dBm (double-width) exists

necessary for video system signal fidelity.

The

per channel. Channel separation of 40dB is provided,

waveform monitor, monitors 525/60 and 625/50

and tone levels may be measured with an overall

systems.

accuracy of 1 dB.

The level measurement is

h. Electronic Counter HP-5245L.

The counter

presented on a dB meter as the deviation in level, of the

provides a digital readout of the frequency of the signal

channel under observation, from the selected normal

being measured. The frequency range is from dc to 50

level stated above (-17, -26, etc.).

MHz.

(2) Frequency Meter. The Mark or Space

i. Data Transmission Test Set 601 (fig. 1-5). The

frequency error of the selected carrier channel (when in

Frederick Electronics Corp.

Model 601 Data

a steady Marking or Spacing condition) is measured and

Transmission Test Set is designed specifically for

indicated in Hz deviation on a front-panel meter.

testing circuits utilizing Bell Data Transmission Sets by

Overall accuracy of the frequency measurement is

means of error counting techniques. The Model 601

within .0.5 cps.

consists of the following modules: (1) A Pattern

(3) Universal Demodulator. At the same time

Generator which is the source of test signals for

that the level of the selected carrier channel is being

comparison with received signals from the system under

measured, the tone signals (AM or FM) are

test; (2) A Synchronizer which establishes and maintains

demodulated and are available to drive a telegraph

bit and pattern sychronization, recognizes pattern errors,

output circuit for monitor TTY machine printout or as a

and develops error pulses for storage and subsequent

test point to provide an indication of distortion. Thus,

readout; (3) An Error Counter which counts the number

troubles in a carrier system can be quickly and easily

of errors in the incoming data and registers the total

localized to sending or receiving terminal equipment.

count on a front panel mechanical counter. The Error

The output signals are standard electronic hub (+60/-

Counter includes a visual and aural alarm system which

30v) drive; as an option, neutral output loop keying can

warns the operator whenever the error rate exceeds the

be provided for use in the neutral TLT testboard.

storage capacity; (4) A Power Supply which provides all

NOTE

operating voltages for the Model 601; (5) A second

Generally, distortion measurements

Pattern Generator which is the source of test signals for

made at the demodulator output will

transmission to the system under test. Two Pattern

be higher, by a few percent, than the

Generator modules are incorporated into the Model 601

true measurements made on the

so that a single unit can be used to perform error rate

circuit under observation.

tests on data subsets connected back-to-back. For this

method of testing, one Pattern Generator transmits the

d. Transmission Measuring Test Set, HP-3550AR.

test pattern to the system and the other Pattern

The Hewlett-Packard model 3550AR is used to measure

Generator provides a synchronized pattern for

transmission line and system characteristics such as

comparison with the pattern at the output of the system.

attenuation, frequency response, or gain. It contains a

wide range oscillator, a voltmeter, and a patch panel to

j. Signal Distortion Analyzer Group ANIGGM-

match both the oscillator and the voltmeter to 135-, 600-

1S(V). This set provides a capability for measuring

, and 900-ohm lines.

signals in DC teleprinter/data loops and for transmitting

digital test messages over these loops. The Digital

e. Dual Speaker Panel.

Speaker panels are

Distortion Analyzer Set includes three major

mounted in the bottom of various patch bays in the P&T.

components, that is, a signal generator, a signal

These panels are used for oral monitoring of VF circuits

distortion analyzer and an oscilloscope.

carrying voice signals for the purpose of determining

continuity and/or the quality of the speech traffic. The

(1) Signal Generator SG-860/GGM-15(V).

panel includes two amplifier/speaker combinations. This

This unit generates data and telegraph signal outputs

allows two independent inputs and outputs. Both inputs

with controlled distortion at speeds up to 9600 baud.

are wired to jacks in TM 11-5895-878-14&P the

Various message options are available for Baudot or

ASCII codes

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