Campbell-scientific RF300-Series DRL VHF/UHF Radio Transceivers Manual de usuario descargar pdf (Pagina 26)

SECTION 3. RADIOTELEMETRY NETWORK COMPONENTS

3-8

See Table 3-7 for cable requirements for

common antennas.

Due to power loss through the cable, the length

of coax cable cannot be extended to any

desired length. The amount of power loss is

dependent on the radio frequency. RG-8A/U

will lose approximately 3.1 dB/100 ft. at 200

MHz and 5.0 dB/100 ft. at 400 MHz. Power loss

calculations are reviewed in Appendix C.

FIGURE 3-5. The PD46 Clamp Mount

FIGURE 3-6. Type-NM (male), BNC, and

Type-NF (female) Connectors

TABLE 3-7 Common Antennas and Characteristics

VHF or Pipe Mounting

Antenna Type UHF Cable Gain(dB) O.D. Type

BA1010 Omni VHF Coax NM-L Unity 3/4" - 2 1/8" U-Bolts

BA1012 Omni VHF Coax NM-L Unity 1" - 2 1/4" U-Bolts

BA1312 Omni VHF Coax NM-L 3.0 1" - 2 1/4" U-Bolts

BA6012 Omni UHF Coax NM-L Unity 1" - 2 1/4" U-Bolts

BA6110 Omni UHF Coax NM-L Unity 3/4" - 2 1/8" U-Bolts

BA6312 Omni UHF Coax NM-L 3.0 1" - 2 1/4" U-Bolts

PD200 Omni VHF Coax NF-L 5.8 1" - 2 3/4" PD46 (Fig 3-5)

PD201 Omni UHF Coax NF-L 5.0 1" - 2 3/4" PD46 (Fig 3-5)

PD220 Omni VHF Coax NF-L 5.25 1" - 2 3/4" PD46 (Fig 3-5)

PD344 Dipole VHF Coax NF-L 4.5 2 1/2" Clamps

PD390S Yagi VHF Coax NF-L 8.0 1 5/16, 2 1/4, or 2 3/8 PD37 (Fig 3-4)

PD400 Omni VHF Coax NM-L 7.5 1" - 2 3/4" PD46 (Fig 3-5)

PD688S Yagi UHF Coax NF-L 10.0 1 5/16" - 2 1/4" U-Bolts

PD1107 Omni VHF Coax NF-L 3.0 1" - 2 3/4" PD46 (Fig 3-5)

PD1121 Dipole VHF Coax NF-L 3.0 2 1/2" Clamps

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Campbell-scientific RF300-Series DRL VHF/UHF Radio Transceivers Manual de usuario Pagina 26