Valcom AS-1735/SRC Operation And Installation Instructions Manual
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Valcom AS-1735/SRC Operation And Installation Instructions Manual

Valcom AS-1735/SRC Operation And Installation Instructions Manual

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TECHNICAL MANUAL
VTM-01-003 Rev C
OPERATION AND INSTALLATION
INSTRUCTIONS
AS-1735/SRC ANTENNA
Valcom Manufacturing Group, Inc
175 Southgate Drive, P.O. Box 603, Guelph, Ontario, Canada N1H 6L3 Tel: 519-824-3220 Fax: 519-824-3411
Web Site: www.valcommfg.ca E-mail: enquiries@valcom-guelph.com

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Summary of Contents for Valcom AS-1735/SRC

  • Page 1 TECHNICAL MANUAL VTM-01-003 Rev C OPERATION AND INSTALLATION INSTRUCTIONS AS-1735/SRC ANTENNA Valcom Manufacturing Group, Inc 175 Southgate Drive, P.O. Box 603, Guelph, Ontario, Canada N1H 6L3 Tel: 519-824-3220 Fax: 519-824-3411 Web Site: www.valcommfg.ca E-mail: enquiries@valcom-guelph.com...
  • Page 3 Original Issue July 20, 2001 Various formatting changes to improve readability May 28, 2002 Updated contact information October 7, 2013 Errors in this publication can be reported to the Manufacturer. Refer to Section 6 for contact information. Valcom Mfg Grp, Inc.

  • Page 5: Table Of Contents

    Manufacturer's Address ......... . 13 Valcom Mfg Grp, Inc.
  • Page 6 TABLES Table 1.1 - Electrical Properties of the AS-1735/SRC Antenna ......1 Table 1.2 - Mechanical Properties of the AS-1735/SRC Antenna ..... . . 2 Table 5.1 - Parts supplied with AS-1735/SRC antenna Shipment .

  • Page 7: General Information

    1735/SRC antenna. Description The AS-1735/SRC antenna is a UHF (ultra high frequency) antenna which provides vertically polarized transmissions and receptions in an omnidirectional radiation pattern across the 225 to 400 MHz frequency range. Optimal operation is achieved when the antenna is mounted on masts of 12 inches in diameter down to 4 inches in diameter.

  • Page 8: Table 1.2 - Mechanical Properties Of The As-1735/Src Antenna

    AS-1735/SRC VTM-01-003C Table 1.2 - Mechanical Properties of the AS-1735/SRC Antenna Weight 31 lbs (14 kg) Finish Epoxy polyamide paint, colour Haze Grey Vertical mast of 4 to 12 inch (10.2 to 30.5 cm) dia. Mounting Position *Optional 12 to 15 inch (30.5 to 38.1 cm) dia.

  • Page 9: Installation

    2.0 INSTALLATION Unpacking The AS-1735/SRC antenna is shipped along with two Technical Manuals within the same shipping container. Carefully pry off the lid of the shipping container to find the antenna and the two manuals in amongst the packing material. See Figure 2.1. Lift out the top layer of packing material and carefully remove the antenna.

  • Page 10: Power Requirements

    Power Requirements The As-1735/SRC antenna has an RF power handling capability of 2 kW Peak Envelope Power in the 225 MHz to 400 MHz range. This is inputted through an LC type, UG-352/U RF connector which is located at the centre of the Lower Feed Section. No other power sources are required.

  • Page 11: Figure 2.2 - Mounting The As-1735/Src Around Masts Of 4 Inches To 12 Inches

    AS-1735/SRC VTM-01-003C Figure 2.2 - Mounting the AS-1735/SRC around masts of 4 inches and 12 inches The antenna is shipped fully assembled and can be thought of having three main sections to it; the Lower Feed Section and the Left-hand and Right-hand Radiating Element Sections (see Figure 2.1).

  • Page 12: Figure 2.3.A - Lower Mounting Hole Dimensions Of The As-1735/Src Antenna

    AS-1735/SRC VTM-01-003C Figure 2.3.a - Lower mounting hole dimensions of the AS-1735/SRC antenna Valcom Mfg Grp, Inc.

  • Page 13: Figure 2.3.B - Upper Mounting Hole Dimensions Of The As-1735/Src Antenna

    AS-1735/SRC VTM-01-003C Figure 2.3.b - Upper mounting hole dimensions of the AS- 1735/SRC antenna Valcom Mfg Grp, Inc.

  • Page 14: Alternate Installation Method

    “line of sight” mode of operation. A minimum vertical spacing of 4 feet must be maintained between the AS-1735/SRC and any other projections from the mast. This is to ensure full efficiency of the antenna and also to protect against damage to other equipment by the high power levels radiating from the antenna.
  • Page 15 The AS-1735/SRC can now be installed by bolting one of the Radiating Element Sections to the support assembly attached to the mast by stainless steel hardware, such as 3/8" bolts and lock washers (not supplied), but do not tighten the bolts all the way yet.

  • Page 16: Operation

    3.0 OPERATION Functional Description The AS-1735/SRC antenna consists of four dipole radiators fed in phase and positioned equally spaced around a circular mast. This configuration provides an omnidirectional radiation pattern in the azimuth plane over the frequency range of 225 MHz to 400 MHz which is capable of power inputs up to 2 kW peak.

  • Page 17: Trouble Shooting And Maintenance

    (see contact information in Section 6). Preventative Maintenance On a regular basis, i.e. once a month, the AS-1735/SRC antenna should be visually inspected for rigidity, cleanliness and general condition. At this time, it is also recommended to remove the UG-352/U connector to check as to whether or not any moisture has formed inside due to condensation.

  • Page 18: Parts List

    VTM-01-003C 5.0 PARTS LIST General A list of parts shipped with the AS-1735/SRC antenna appears in Table 5.1. A list of optional parts available from the manufacturer appears in Table 5.2. Table 5.1- Parts supplied with AS-1735/SRC antenna Shipment Item #...

  • Page 19: Quick Reference Data

    6.0 QUICK REFERENCE DATA General Manufacturer’s contact information can be found in Section 6.2. Manufacturer's Address Postal address: Shipping address: Valcom Manufacturing Group, Inc Valcom Manufcaturing Group, Inc P.O. Box 603 175 Southgate Drive Guelph, Ontario Hanlon Industrial Park Canada...

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