NAEB Engineering Newsletter (July 1956)

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- 6 - On April 11, 1956, the FCC proposed rule making amending Sections 3.66 (AM), 3.274 (FM) and 3.572 (noncommercial educa¬ tional FM) of the FCC Rules and Regulations to authorize the remote control operation of all standard and FM broadcast stations, including those authorized to operate with directional antenna systems or with powers in excess of 10 kilowatts. Present regula¬ tions permit remote operation, subject to certain conditions, only by standard non-directional and FM broadcast stations authorized to operate with powers not in excess of 10 kilowatts. The NARTB has completed a very extensive survey of this prob¬ lem. As a result it has accumulated a large volume of data which shows that remote control operation of any station including those with directional antennas is entirely possible and practical. In fact, the data shows that once the remote control operating and transmitting equipment is properly adjusted, there are fewer outages with remote operation than when an operator is in attend¬ ance. As far as directional antennas are concerned, consulting engineers participating on a panel discussion of this problem at the recent NARTB Broadcast Engineering Conference stated that once properly designed and properly adjusted, these directional arrays are one of the most stable elements of the transmission system. They recommended that once adjusted, the tuning houses should be locked and remain locked and stated that a weekly check was sufficient to assure maintenance of the proper pattern. Comments on this proposal, Docket No. 11677 should be filed with the Commission on or before June 1, 1956. ***** Note for iH nflgcQpe recorder operators . Jack Chenoweth of KETC recommends the use of the following equipment as a means of obtaining matched camera shots for kinescope recording. He states that KETC uses a Weston Photronic Model 594 RR photocell in conjunction with a Simpson Model 29 DC microammeter with a 0-50 microampere scale. Their method is to mount the photocell within the hood of their video recorder to measure the illumination from the picture tube. The cameras in use should be focused on the same scene with the same focal length lens and at the same distance from the scene. The same peak to peak video voltage and pedestal levels should be set. By switching between cameras, any difference in gray scale will show up in the reading of the microammeter. By- adjustment of beam, target, and perhaps lens stops, it is possible