TELEMETRY EQUIPMENT

ANTENNA : CABLES

General Description

The type of cable used in the antenna system depends on the cable length required and the acceptable signal loss. A general recommendation is to use RG8 for lengths up to 60 ft, 1/2 in. foam for lengths up to 250 ft. and 7/8 in. foam for lengths over 250 ft.

The antenna cables for the packaged gauges are designated by adding “C” to the package model number e.g. 5054C. These standard cable assemblies are RG8 with BNC male and PL-259 male connectors. For packages with lightning arrestors add “LA” to the designation e.g. 5054C-LA; the cable is divided in two and “N” type male connectors are added to the assembly. For custom RG8 cables designate CRG8-connector/connector eg. CRG8-BNC/NF. Standard connectors available are BNC(male), PL(-259male), NM(male) and NF(female). For cable lengths over twenty feet order additional cable per foot as CRG8-A.

Foam cable is supplied in bulk and ordered by the foot as e.g. C1/2F. Foam cable installation d oes not lend itself to preassembly of the connector set which are ordered separately with a designation e.g. C1/2-CS. The cable is very stiff which requires that the excess cable be trimmed at the time of installation. Another consequence of the stiffness is resolved by adding a RG8 pigtail cable (CRG8-NM/NF) for a smooth transition to the radio package.

At sites with tower mounted antenna systems the radio should be installed as close to the antenna as practical to minimize cable length and signal loss.

 

Options

N/A

 

Specifications

ANTENNA CABLES : SPECIFICATIONS

CRG8-xx/xx
Cable Type: RG8
Connectors (xx/xx):
  BNC :BNC Male
  PL :PL-259 Male
  NM :"N" Type Male
  FM :"N" Type Female
Nominal Impedance: 50 ohms
Minimum Bending Radius: 1 in.
Weight/100 ft.: 10 lbs.
Diameter Over Jacket: 0.405 in.
dB loss/100 ft. @ 170 MHz: 2.6
dB loss/100 ft. @ 420 MHz: 4.4

C1/2F
Cable Type: ½ in. Foam
Connectors: NM/NF
Nominal Impedance: 50 ohms
Minimum Bending Radius: 5 in.
Weight/100 ft.: 161 lbs.
Diameter Over Jacket: 0.64 in.
dB loss/100 ft. @ 170 MHz: 1.25
dB loss/100 ft. @ 420 MHz: 2.05

C7/8F
Cable Type: 7/8 in. Foam
Connectors: NM/NF
Nominal Impedance: 50 ohms
Minimum Bending Radius: 10 in.
Weight/100 ft.: 331 lbs.
Diameter Over Jacket: 1.1 in.
dB loss/100 ft. @ 170 MHz: 0.78
dB loss/100 ft. @ 420 MHz: 1.30

Click here for detail Specifications and Ordering Information.

 

Ordering Information

  • 7/8 in. Foam

CRG8-xx/xx
Standard Antenna Cable

  • RG8
  • 20 ft.
  • Specify Connectors (xx/xx)

CRG8-A
Additional Antenna Cable, per ft.

  • RG8
  • Under 60 ft

CRG8/3-xx/xx
Pigtail Cable

  • RG8
  • 3 ft.
  • Specify Connectors (xx/xx)

C1/2F
Antenna Cable, per ft.

  • 1/2 in. Foam
  • 60 ft. to 250 ft.

C7/8F
Antenna Cable, per ft.

  • 7/8 in. Foam
  • Over 250 ft.

C1/2CS
Connector Set (NM/NF)

  • 1/2 in. Foam

C7/8CS
Connector Set (NM/NF)

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