Equipment information

General Radio Company 1390-B Generator
Manufacturer:
Model:
1390-B
Date:
1965
Category:
Group:
Description:
RANDOM-NOISE GENERATOR

Information

The Type 1390-B Random-Noise Generator (Figure 1) provides a high level of electrical noise at its output terminals. This type of signal is useful in room acoustic measurements, loudspeaker and microphone tests, psychoacoustic tests, Filter tests, crosstalk measurements for multichannel carrier systems, calibration checks on recording systems, modulation of signal generators and test oscillators, tests of rms response of meters, observation of resonance in systems, electrical averaging of resonant responses, and comparisons of effective band width. A pair of these generators can be used as signal sources for demonstration of various degrees of correlation, possible errors of random sampling, and other concepts of statistical theory.

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Service and User Manual
Manual Type:
Service and User Manual
Pages:
24
Size:
10.81 Mbytes (11335972 Bytes)
Language:
english
Revision:
Manual-ID:
1390-0100-K
Date:
1965 11 01
Quality:
Scanned document, all readable.
Upload date:
2016 12 29
MD5:
06825baee978096f4fb45402a9bf63c6
Downloads:
591

Information

Section 1 INTRODUCTION ... 1 1.1 Purpose ... 1 1.2 Description ... 1 Section 2 THEORY OF OPERATION ... 2 2.1 General ... 2 2.2 Output Voltage . ... 2 2.3 Characteristics of Noise Output ... 2 2.4 Departures of Output from True Randomness . ... 4 2.5 Frequency Spectrum of Noise ... 4 2.6 Analysis of Noise by Constant-Percentage Analyzers ... 4 2.7 Type 1390-P2 Pink-Noise Filter ... 4 Section 3 INSTALLATION ... 6 3.1 Bench Mounting ... 6 3.2 Relay-Rack Mounting ... 6 3.3 Power Supply Connection . ... 6 Section 4 OPERATING PROCEDURE ... 6 4.1 Start-Up ... 6 4.2 Frequency Control ... 6 4.3 Output Control ... 6 4.4 Voltmeter ... 6 4.5 Load ... 7 4.6 Hum ... ... 7 4.7 Applications ... 7 Section 5 SERVICE AND MAINTENANCE ... 11 5.1 General ... 11 5.2 Access to Components ... 11 5.3 Preliminary Checks ... 11 5.4 Meter Does Not Read ... 11 5.5 Tube Replacement ... 11 5.6 Heaîer Voltage of Type 6D4 Gas Tube ... 11 5.7 Voltage Measurements ... 11 PARTS LIST 13

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