Cushman Electronics Inc. CE-15 Spectrum analyzer
Manufacturer:
Model:
CE-15
Date:
1977
Category:
Group:
Description:
Spectrum Monitor

Information

The Cushman CE-15 Spectrum Monitor is particularly designed for use in the Radio Maintenance field. It provides the user with the capability of visually monitoring a selected portion of the radio frequency spectrum lor the purpose of determining spurious emissions, intermodulation interference, unwanted Oscillator radiation, and harmonic levels. This instrument can monitor and audibly identify AM and FM carriers, which is particularly useful in the case of interference. It may be used to check intermodulation distortion between RF signals, do IF and RF signal tracing and may be used as a field strength receiver when using a calibrated antenna. DESCRIPTION 1.02 The Spectrum Monitor is essentially a triple conversion superheterodyne receiver with a video display as well as an audio output demodulated from either AM or FM signals. The frequency range Is from 1 to 1000 MHz. It has four scan widths, 10 kHz, 100 kHz, 1 MHz and 10 MHz per division. It also has a selectable 2 kHz bandwidth Filter on the 10 kHz scan width range to reduce noise when viewing low level signals. 1.03 An LED frequency display with Coarse and Fine tuning controls provides for accuracy in setting the center frequency of the display and a graticule calibrated in 10 dB per step divisions makes it possible to view a 70 dB amplitude signal. Its high sensitivity, -115 dBm (0.4/µV), permits viewing extremely low level signals. 1. 04 Front panel access to an internal level and frequency reference makes it possible to maintain a level accuracy of measurement of better than ± 3 dB. It is possible to introduce an external calibrated signal from an accurate source such as a CE-6A Communications Monitor for use as a frequency calibrating marker simultaneously with the signal being monitored. 1.05 Sweep rate and IF Filter controls have been eliminated. These arc set to their optimum value for each range selected. A first IF of 2100 MHz eliminates problems from image frequencies, since they will be 1.2 GHz away from the frequency of interest.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
30
Size:
11.98 Mbytes (12556911 Bytes)
Language:
english
Revision:
Manual ID:
Date:
1977 06 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2017 08 07
MD5:
34b6d70dc1d8e0a6104f2484ed4a1f99
Downloads:
929

Information

Serial Number 451 and up GENERAL Inti*oduction Description Accessories and Options OPERATION Controls and Indicators Operation Initial Set-up and Calibration Spectrum Measurements Higher Resolution Audio Monitoring Marker Usage Service or Repair Preparation for Shipment Operation Notes THEORY OF OPERATION Introduction Circuit Reference Series General Description Component Numbering Cross Reference Functional Description Circuit Description RF Attenuator, 2100 First Converter, 2200 Y1G Driver, 3100 Second Converter, 2300 1900 MIIz Oscillator, 2700 Third Converter, 2400 IF Switchabie Gain and Bandwidth, 3200 Log Converter, 3300 Audio/+10V Supply, 3500 Ramp Generator/Deflection Amplifier, 3600 High Voltage Supply, 3700 A/D Converter, 1300 Display, 1200 12V DC Inverter, 3400 MAINTENANCE General Performance Check Test Equipment Required Level Accuracy Frequency Response Scan Width Functions FM Demodulation AM Demodulation Adjustments General Power supply Adjustment Ramp Generator/Deflection Amplifier Adjustment Frequency Scan Adjustment Digital Panel Meter Adjustment PARTS LISTS AND SCHEMATIC DIAGRAMS Parts Lists and Schematic Diagrams Introduction

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