AS-2259_antenna_serv_user_TM11-5985-379-14P_1986.pdf

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1、TM 11-5985-379-14 one man 15 minutes. Packed weightLess than 14.7 pounds. 1-3 TM 11-598S-379-14 however, in extreme environments, it may include the range from 1 to 200/300 miles. The skip zone is of a very critical range for most tactical communication systems including manpack,vehicular,and shelte

2、r equipments, Most tactical requirements necessitate good com- munications in the 0- to 300-mile range, If hf communications are to be effective in this range, different antennas and propagation modes are necessary. The solution to the short-range communication problem isthe use of sky-wave instead

3、of ground-wave propagation on the short paths. This requiresradiation from the antenna at very high elevation angles (near vertical incid- ence) as shown in figure 3-4 arid 3-5, Radiation characteristics of this type are achieved through the use of horizontal antennas mounted above ground up to a he

4、ight of about one-quarter 3-1 TM 11-5985-379-14 lower decile, -10 dBl v/m; and upper decile +12 dB 1 v/m. The required signal level (field strength) is then the median noise level plus the service factor, or 29 dB above 1 microvolt/meter. An additional 4 dB is added to this figure to ensure field st

5、rength down to 45 degrees above the horizon. Figure 3-8 shows the required field strength to be 33 dB above 1 microvolt/meter. 3-2 TM 11-5985-379-14 such as for shipment to another site. C-2 (C-3 blank)/C-4 SECTION II INTEGRAL COMPONENTS OF END ITEMTM11-5985-379-14 use it to Indicates the Federal it

6、em name and, if required, a description to identify the indicates the part number followed by the Federal Supply Code for Manufacturer (FSCM) in parentheses, if applicable. e. Column 5 Unit of Measure (U/M). Indicates the measure used in performing the actual maintenance function. This measure is ex

7、pressed by a two-character alphabetical abbreviation (e.g., ea, in, pr). If the unit of measure differs from the unit of issue, requisition the lowest unit of issue that will satisfy your requirements. F-1 TM11-5985-379-14&P SECTION II EXPENDABLE SUPPLIES AND MATERIALS LIST (1)(2)(3)(4)(5) ITEMLEVEL

8、NATIONALDESCRIPTIONUNIT NO.STOCKOF NUMBERMEAS 1C8305-00-267-3015CHEESE CLOTHYD (81348) 2C5340-00-906-3666BRUSH, SOFT BRISTLEDEA 3C7930-01-055-6121DETERGENT, GP, LIQGL F-2 By Order of the Secretary of the Army: Official: MILDRED E. HEDBERG Brigadier General, United States Army The Adjutant General Distribution: To be distributed in accordance with special list. JOHN A. WICKHAM JR. General, United States Army Chief of Staff PIN: 056044-000