California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 13 - Logging and Sawmill Safety Orders › Appendix A - Radio Control Signaling Devices

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Radio equipment at cable logging sites which is used
					 primarily for voice communication shall be assigned a frequency separate from
					 radio equipment used primarily to: initiate whistles and other audible
					 signaling devices; control any machine, material handling device, or other
					 equipment hazards to workers.
Frequencies at 72.44, 72.48, 72.52, 72.56, 72.60, 75.44,
					 75.48, 75.52, 75.56, 75.60, 154.57 and 154.60 megahertz (MHz) are to be
					 retained for channels using coded modulation to provide secure signalling for
					 the purpose of activating signalling devices and machine functions in cable
					 logging with a maximum one half watt output. Voice transmission on these radio
					 frequencies will be limited to emergency situations only.
All radio devices that are tone coded for signal and/or
					 machine functions or used for voice communications, shall meet or exceed the
					 following requirements, specifications, tolerances and tests:
(1) Transmitters and receivers shall be Federal
					 Communications Commission (FCC) type accepted and certified.
(2) Radio coded systems which activate audible signals or
					 machine functions shall transmit and decode only on authorized codes.
(3) The receiver tone signaling threshold sensitivity shall
					 be .35 micro-volt or better to initiate the signal function.
(4) The receiver spurious attenuation shall be no less than
					 50 dB.
(5) The receiver selectivity shall be more than 60 dB at
					 the adjacent channel.
(6) In tone coded systems the receiver decode tone
					 frequency stability shall not exceed plus or minus (±) .006 (.6 percent)
					 of the assigned tone frequency.
(7) In tone coded systems, the transmitter encoder tone
					 frequency stability shall not exceed plus or minus (±) .006 (.6 percent)
					 of the assigned tone frequency.
(7.5) In systems which use coded modulation other than tone
					 coding, tolerances on modulation/code parameters shall be such as to guarantee
					 security against code falsing and/or interference with systems of the same or
					 different coding format.
(8) Radio systems (transmitters and receivers) shall
					 operate in accordance with the specifications over an ambient temperature range
					 of minus 30°C to plus 60°C.
(9) Switches of transmitters used to send whistle signals
					 or activate equipment associated with high lead, slackline, or skidder systems
					 of logging shall be designed so that two buttons, motions, or a combination of
					 these are required simultaneously to cause activation of the system.
					 Arrangement of the activating switches shall be such that the operator can
					 transmit signals easily by the use of either hand, but cannot easily activate
					 the transmitter accidentally.
(10) All receivers intended to be mounted on or in the
					 yarder or similar equipment shall continue to operate satisfactorily and shall
					 suffer no mechanical damage after being subjected to a series of no less than
					 10 impacts in each plane (total 30). Each impact shall be no less than 20 g
					 acceleration.
(11) All receivers intended for mounting in the yarder or
					 similar equipment, and all portable transmitters, shall continue to maintain
					 specified mechanical and electrical performance during and after being
					 subjected to vibration of the magnitude and amplitude as prescribed in
					 ANSI/TIA/EIA-603-1992, Section
					 3.3.4, Vibration Stability, which
					 is hereby incorporated by reference.
(12) All portable transmitters shall continue to maintain
					 specified mechanical and electrical performance after being subjected to the
					 following test:
The equipment shall be dropped once on each of 5 surfaces
					 from a height of 4 feet.
(13) At least one model of each radio system shall be
					 tested, and certified that it meets or exceeds the minimum requirements for
					 performance specified in this Appendix. The model shall be selected at random
					 from stock.
1. Amendment
					 of Appendix A filed 2-6-85; effective thirtieth day thereafter (Register 85,
					 No. 6).
2. Amendment of second and fourth paragraphs filed 5-1-97;
					 operative 5-31-97 (Register 97, No. 18).
3. Change without
					 regulatory effect amending fourth paragraph filed 12-23-97 pursuant to section
					 100, title 1, California Code of
					 Regulations (Register 97, No. 52).
4. Amendment filed 10-24-01;
					 operative 11-23-01 (Register 2001, No. 43).
5. Change without
					 regulatory effect providing more legible illustrations within Appendix A filed
					 3-2-2009 pursuant to section
					 100, title 1, California Code of
					 Regulations (Register 2009, No. 10).
Note: Authority cited: Section
						142.3, Labor
						Code. Reference: Section
						142.3, Labor
						Code.