Radiotelephone Transmitter. Tion of H3E and J3E Emissions on the (A) the Transmitter Must Be Capable Radiotelephone Distress Frequency
Total Page：16
File Type：pdf, Size：1020Kb
Federal Communications Commission § 80.859
§ 80.855 Radiotelephone transmitter. tion of H3E and J3E emissions on the (a) The transmitter must be capable radiotelephone distress frequency. The of transmission of H3E and J3E emis- receiver must be capable of reception sion on 2182 kHz, and J3E emission on of J3E emissions on 2638 kHz and the 2638 kHz and at least two other fre- receiving frequencies associated with quencies within the band 1605 to 3500 the transmitting frequencies author- kHz available for ship-to-shore or ship- ized pursuant to § 80.855(a). to-ship communication. (b) One or more loudspeakers capable (b) The duty cycle of the transmitter of being used to maintain the distress must permit transmission of the inter- frequency (2182 kHz) watch at the prin- national radiotelephone alarm signal. cipal operating position and at any (c) The transmitter must be capable other place where the listening watch of transmitting clearly perceptible sig- is performed must be provided. nals from ship to ship during daytime (c) The receiver required by para- under normal conditions over a range graph (a) of the section must: of 150 nautical miles. (1) Have a sensitivity of 50 (d) The transmitter complies with microvolts; the range requirement specified in (2) Be capable of operation when en- paragraph (c) of this section if: ergized by the main source of energy, (1) The transmitter is capable of and by the reserve source of energy if a being matched to actual ship station reserve source is required by § 80.860(a); transmitting antenna meeting the re- (3) Be protected from excessive cur- quirements of § 80.863; and rents and voltages; (2) The output power is not less than (4) Be provided with a nameplate 60 watts peak envelope power for H3E showing the name of the receiver man- and J3E emission on the frequency 2182 ufacturer and the type or model. kHz and for J3E emission on the fre- (d) The sensitivity of a receiver is the quency 2638 kHz into either an artifi- strength in microvolts of a signal, cial antenna consisting of a series net- modulated 30 percent at 400 cycles per work of 10 ohms resistance and 200 pi- second, required at the receiver input cofarads capacitance, or an artificial to produce an audio output of 50 antenna of 50 ohms nominal imped- milliwatts to the loudspeaker with a ance. An individual demonstration of signal-to-noise ratio of at least 6 deci- the power output capability of the bels. Evidence of a manufacturer’s rat- transmitter, with the radiotelephone ing or a demonstration of the sensi- installation normally installed on tivity of a required receiver computed board ship, may be required. on this basis must be furnished upon (e) The transmitter must provide vis- request of a Commission representa- ual indication whenever the trans- tive. mitter is supplying power to the an- tenna. [51 FR 31213, Sept. 2, 1986, as amended at 73 (f) The transmitter must be protected FR 4487, Jan. 25, 2008] from excessive currents and voltages. (g) A durable nameplate must be § 80.859 Main power supply. mounted on the transmitter or made (a) The main power supply must si- an integral part of it showing clearly multaneously energize the radio- the name of the transmitter manufac- telephone transmitter at its required turer and the type or model of the antenna power and the required receiv- transmitter. ers. Under this load condition the volt- (h) An artificial antenna must be pro- age of the main power supply at the ra- vided to permit weekly checks of the diotelephone input terminals must not automatic device for generating the ra- deviate from its rated potential by diotelephone alarm signal on fre- more than 10 percent on ships com- quencies other than the radiotelephone pleted on or after July 1, 1941, nor by distress frequency. more than 15 percent on ships com- pleted before that date. § 80.858 Radiotelephone receiver. (b) Means must be provided for charg- (a) The receiver required by § 80.854(a) ing any batteries used as a main power of this part must be capable of recep- supply. A continuous indication of the
133
VerDate Mar<15>2010 11:43 Jan 07, 2011 Jkt 220204 PO 00000 Frm 00143 Fmt 8010 Sfmt 8010 E:\TEMP\220204.XXX 220204 rmajette on DSK29S0YB1PROD with CFR