{"title":"A new concept in the reliability evaluation of vehicular radio","authors":"Frederick L. Hilton","doi":"10.1109/TVC.1960.6499327","DOIUrl":"https://doi.org/10.1109/TVC.1960.6499327","url":null,"abstract":"This paper describes automatic equipment developed to conduct temperature tests of two-way vehicular radio. The automatic test unit reported below controls the temperature chamber, maintains input voltages at proper EIA specified levels, turns test specimens on and off, measures the operational performance parameters of transmitters and receivers at each of the selected temperature conditions and prints the data. Four units can be tested at a time and these may be any combination of standard frequency bands, carrier or continuous tone coded squelch and wide band or split channel.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1960-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116042630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A hybrid mobile two-way radio","authors":"R. A. Beers","doi":"10.1109/TVC.1960.6499330","DOIUrl":"https://doi.org/10.1109/TVC.1960.6499330","url":null,"abstract":"Maximum effective use is made of transistors and tubes to achieve a mobile unit with superior performance characteristics and considerably improved realiability without, at the same time, appreciably increasing the cost of the radio equipment. No aspects of performance have been compromised to accomodate the use of transistors.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1960-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130461564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The new trend in minified communications equipment","authors":"J. Knoll","doi":"10.1109/TVC.1960.6499328","DOIUrl":"https://doi.org/10.1109/TVC.1960.6499328","url":null,"abstract":"This paper presents a brief description of the Micro-Module building-block and the current program status in terms of both up-to-date hardware accomplishments and future consideration, particularly in the area of miniaturized communications equipment. The advantages offered by the revolutionary Micro-Module are reviewed and illustrated with reference to size reduction and packaging design potential in the following: (1) AN/PRC-36 Combat Helmet Radio Set (2) AN/URC-11 Personal Rescue Receiver-Transmitter (3) AN/PRC-25 Portable Radio Set (4) HF Single Sideband Receiver (5) Non-Military and Commercial Communication Equipment","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1960-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122165719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The application of semiconductors in a 860 mc radio receiver","authors":"L. Schimpf","doi":"10.1109/TVC.1960.6499329","DOIUrl":"https://doi.org/10.1109/TVC.1960.6499329","url":null,"abstract":"An all solid state, FM radio receiver operating at 860 mc is described. The active elements used are transistors and variable reactance diodes. The receiver is of the double conversion type with IF frequencies at 63 and 10.7 mc. The first local oscillator chain uses four stages to generate a signal at 923 mc. The crystal controlled oscillator and two frequency doublers use diffused base transistors. The output of the second doubler, at a frequency of approximately 300 mc, is then tripled in a circuit employing a varactor diode in order to obtain the desired local oscillator signal. The receiver has a 6 db bandwidth of 30 kc. If the output is equalized for a phase modulated signal, 10 db of noise quieting is obtained with a 0.8 microvolt input signal.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1960-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123862628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Impulse noise reduction circuit for communication receivers","authors":"W. Chow","doi":"10.1109/TVC.1960.6499326","DOIUrl":"https://doi.org/10.1109/TVC.1960.6499326","url":null,"abstract":"In this paper a comparatively simple scheme of reducing the impulse noise is suggested. This system consists of a gating signal generator and a balanced gate. It functions as follows: the impulse noise in the antenna triggers the gating signal generator. This generator produces a gating signal which in turn controls a balance gate. The function of the gate is to block the transmission during the gating period. Both the principle and the circuits of this impulse noise reduction scheme are described. Experimental results give the improvement of signal to noise ratio at the audio output ranging from 14 to 18 db.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1960-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123408427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The use of level controlling devices in the radio-telephone service","authors":"L. Getgen","doi":"10.1109/IRETVC1.1958.225105","DOIUrl":"https://doi.org/10.1109/IRETVC1.1958.225105","url":null,"abstract":"This paper introduces the subject of speech level control as applied to radio-telephone service by presenting statistical data describing talker level variations and anticipated levels at the telephone central office. Because speech measurements are difficult to make, mention is made of speech to sine wave relationships that are convenient for system line-up. Next, maximum levels are established for the output of the controller and application to the wire-line or the radio transmitter. The operational characteristics of three available types of level controlling devices are discussed. These are: the Agamp and Vogad which were designed specifically for control of speech levels into radio transmitters; the clipper-limiter commonly used in radio broadcasting; and the Compandor which is familiar in telephone applications. Recordings were made of these devices in operation. Analysis of these recordings as related to the “ground rules” established in the text allowed conclusions to be drawn concerning the most advantageous use of each. In discussing the use of level controlling devices, it is necessary to determine the nature of the signals that are to be controlled. Where telephone facilities are to be used, consideration must be given to plant practices. These practices as well as the transmitter input requirements will establish the output level limits for the device. Having an idea of the input and output requirements and taking into account unusual noise and environmental conditions, the next step is to examine the characteristics, and cost of available units to determine the extent to which they meet the system application.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1958-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114923100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A proposed system for 11 channel access in the mobile telephone service","authors":"C. A. Rypinski","doi":"10.1109/IRETVC1.1958.225104","DOIUrl":"https://doi.org/10.1109/IRETVC1.1958.225104","url":null,"abstract":"A signaling, supervision and radio technique suitable for multi-channel access in the VHF MTS band is proposed. The logic is based on the continued use of 600/1500 cps transitional signaling and certain existing methods of transmitting supervisory signals to the base terminal. Mobile identification is provided but is neither required or excluded. The availability of a mobile radio equipment which does not detriorate as a result of continuous channel switching is assumed. Signaling tone at either frequency is used to mark the idle channel on which the next call will appear or on which the mobile may seize the terminal. If the mobile is not locked on a channel marked idle, the busy indication is given. The logic of this technique is further detailed in a Table and is illustrated by tracing sequences of calls including special cases such as carrier fade, simultaneous seizure and the persistent caller with no answer. To illustrate feasibility a suitable mobile decoder and control unit is described which provides decoding, supervision and logical control. Component content of this design is tabulated. A possible configuration of a preferred mobile radio transceiver is proposed which employs synthesis type channel switching, linear detection and full duplex operation. The 13 crystals employed are shared by transmitter and receiver and only one is a high accuracy type. It is the object of this paper to encourage the adoption of a multi-channel access standard to serve the interval preceding the development of the broad band service by showing compatibility with existing technique and the feasibility of the required equipment.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1958-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129529112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A selective ringing decoder for mobile radiotelephone use","authors":"J.D. Malone","doi":"10.1109/IRETVC1.1958.225101","DOIUrl":"https://doi.org/10.1109/IRETVC1.1958.225101","url":null,"abstract":"A mobile radiotelephone must include a selective ringing decoder which signals the subscriber when his particular telephone is being called.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"7 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1958-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124295903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"SINAD system design","authors":"R. A. Farmer","doi":"10.1109/IRETVC1.1958.225107","DOIUrl":"https://doi.org/10.1109/IRETVC1.1958.225107","url":null,"abstract":"This paper deals with performance parameters used in designing a communication system, black boxes and all, rather than with the circuit parameters needed to design the individual equipments which make up the total system. There is a common language for use in the Land Mobile Services which should, but does not yet, have the stature of CCIF and CCITT specifications used by system designers In the field of point-to-point communications. The Electronic Industries Association (EIA) specifications for Land Mobile equipment are examined and their applicability to system design work is discussed.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"149 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1958-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114049233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A centralized mobile telephone test panel","authors":"J. P. Gill","doi":"10.1109/IRETVC1.1958.225102","DOIUrl":"https://doi.org/10.1109/IRETVC1.1958.225102","url":null,"abstract":"A centralized method of testing Mobile, Test and Base Station Transmitters \"Off the Air\" has always been considered desirable. With the inauguration of 450 Mc. narrow band common carrier telephone service with its more stringent requirements, a centralized method of testing has become almost a necessity. The Centralized Mobile Telephone Test Panel described herein can be used to evaluate the overall performance of a Mobile telephone system and can also be used as a tool to insure proper routine operation of a system. Provisions are made in the CMTTP for automatic sampling of each radio channel with statistical evaluation of ON-OFF frequency operation of mobile transmitters. The present unit is arranged to monitor on the 450 Mc. and Personal Signaling (Bellboy) services only. However, the test panel can be readily adapted for the 40 and 150 Mc. channels as well.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1958-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127178998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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