Related Manuals for Shively Labs 6017
Summary of Contents for Shively Labs 6017
- Page 1 FM Broadband Multistation Broadcast Antenna Model 6017 Instruction Manual Installation, Operation, & Maintenance...
- Page 2 Meanwhile, please feel free to contact your sales representative at Shively Labs at any time if you need information or help. Call or write: Publication No. IM017 (100201)
- Page 3 IMPORTANT Please read this manual in its entirety before beginning installation of your antenna! Failure to follow the installation and operation instructions in this manual could lead to failure of your equipment and might even void your warranty!
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Page 5: Table Of Contents
Table of Contents Chapter 1 Preparing for Installation ..........1 Receiving ..................... 1 Unpacking .................... 1 Check the System ................. 2 Chapter 2 Installing the Mounts ............3 Before Beginning Mount Installation: ............3 Mark Mount Locations on the Mounting Pole ........... 3 Installing the Radiator Mounts on the Pole .......... - Page 6 Table of Contents Chapter 8 Maintenance ..............26 Precautions..................26 (continued) Maintenance Log................. 26 Physical Inspection................26 Paint ....................27 Troubleshooting .................. 27 Return Policy ..................27 Sample Maintenance Log ..............28 List of Illustrations Figure 1 Typical Mount Installation on Pole, top view......3 Figure 2 4-Way Power Divider Installation, top and side views....
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Page 7: Receiving
If all the boxes are present and in good condition but material seems to be missing, please contact Shively Labs immediately, using the telephone or Fax number on the inside cover of this manual. For the best service, have our shop order number (S/O) handy;... -
Page 8: Check The System
Have a reliable tower person, familiar with antennas and coaxial line, inspect the tower and review the installation drawings before the full rigging crew arrives. If design problems are found, contact Shively Labs immediately. Pay particular attention to: • Frequency of the antenna. -
Page 9: Chapter 2 Installing The Mounts
Also mark the location on the pole of any accessory mounts, such as for the power dividers or special coax line sections, to make sure they will fit as planned. c. If any problems appear during this process, please call Shively Labs and discuss them with the installation designer. Installing the... -
Page 10: Installing The 4-Way Power Divider Mounts On The Pole
Installing the Mounts Figure 1 is a top view showing how the radiator mount pieces fit together. Assemble and install the radiator mounts according to Figure 1, your installation drawing, and the following guidelines: a. Find the marked locations on the mounting pole where the radiator mounts will be located. -
Page 11: Figure 2 4-Way Power Divider Installation, Top And Side Views
Installing the Mounts (not to scale) Figure 2. 4-Way Power Divider Installation, top and side views... -
Page 12: Installing The Main Power Divider Mounts
Installing the Mounts Installing the Main If your antenna has more than one level, a main power divider will dis- tribute the signal among the 4-way power dividers at each antenna Power Divider level. Assemble and install the main power divider mounts according to Mounts... - Page 13 Installing the Mounts a. Find the marked location on the mounting pole where the power divider mounts will be located. b. Referring to the installation drawing, mark the locations of the power divider mounts (generally there will be two mounts). CAUTION If you don't get good electrical contact between the mounts and the pole, the antenna may not perform as designed, and may pro-...
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Page 14: Chapter 3 Installing The Radiators And Power Dividers
Installing the Radiators and Power Dividers 3 Installing the Radiators and Power Dividers Before Beginning CAUTION All electrical contact surfaces and openings to the interior of the Radiator and Power components are protected from contamination and from physical Divider Installation: damage by plastic protectors. -
Page 15: Installing Power Dividers
Installing the Radiators and Power Dividers (not to scale) Figure 4. Radiator Installation, top view Installing Power Assemble and install the power dividers and their mounts according to your installation drawing and the following guidelines: Dividers a. Check the mount locations against your installation drawing. b. -
Page 16: Chapter 4 Installing The Coaxial Feed System
Installing the Coaxial Feed System 4 Installing the Coaxial Feed System Before Beginning Feed System Installation: Figure 5. Feedline Flange Detail CAUTION Semiflex cable has a minimum bending radius, specified by the manufacturer. Bending it too sharply will damage the cable. See Table 1 for the various sizes. -
Page 17: Installing The Power-Divider-To-Radiator Cables
Installing the Coaxial Feed System CAUTION Do not use silicone grease on the O-rings, as this tends to dis- solve the silicone O-ring. Use only a light lubricating coat of petro- leum jelly; too much may hamper electrical contact and contaminate the interior of the system. -
Page 18: Installing The Main Power Divider (If Applicable)
Installing the Coaxial Feed System Figure 6. Flange Bolt Tightening Sequences d. After all RF components (ie: power dividers, radiators, rigid coax) have been connected to each other, tighten the mounting bolts securing the RF feed system to the pole. Installing the Main If your antenna has more than one level, a main power divider will feed it, with a cable to the four-way power divider at each level. -
Page 19: Chapter 5 Pressurization And Startup
Pressurization and Startup 5 Pressurization and Startup Before Beginning Important Shively Labs will not accept responsibility for antenna failure after Pressurization: operation without proper purging or positive pressure of dry air or dry nitrogen. CAUTION When pressurizing the system, never use a "garage" air compres- sor, as it will not clean the air and will blow both moisture and contaminants such as oil and graphite into the coaxial system. -
Page 20: Figure 7 Pressurized Gas Schematic
Pressurization and Startup Pressure Correction: where PC = corrected Figure 7. Pressurized Gas Schematic c. Pressurize the system to eight (8) psig, then close the shutoff valve. Give the system one half hour to stabilize, then record the pressure and the temperature. final pressure, psig d. -
Page 21: Step 2. Purging The System
System The dry gas used may be dry cylinder nitrogen or air from a compres- sor-dehydrator. Shively Labs suggests three volume changes of dry gas for an "average" system. There is a pressure relief valve at the top of each four-way power divider. -
Page 22: Step 3. Leaving The System Pressurized
NOTE A standard nitrogen cylinder (9 inch diameter by 55 inches tall) contains about 200 cubic feet (2.6 m ) of gas. Shively Labs Mod- els 1235 and 2577 compressor-dehydrators will provide about 12 cubic feet (0.34 m ) per hour; the Model 1234 about 78 cu ft (2.2 ) per hour. -
Page 23: Initial Characterization (Recommended)
OSHA standard for exposure to non-ionizing radiation. To test and adjust VSWR safely, use low-power test equipment, such as a network analyzer or an impedance bridge. If you don't have access to low-power test equipment, please call Shively Labs before proceeding. WARNING... -
Page 24: Step 2. Transmission Line Tdr Reading
Record the reading and file it with this manual. If VSWR is not satisfactory, check to be sure all the radiators are func- tioning (see below). If they are, call Shively Labs to help identify the problem. Step 4. Checking Again using the low-power test equipment to provide a signal to the antenna and read VSWR, have the rigger detune each radiator in turn. - Page 25 Take initial readings, and repeat the readings peri- odically. Performance readings should not change, and there should be no evi- dence of heating in the antenna system. If any problem is found, fix it now. Call Shively Labs if you need help or advice.
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Page 26: Chapter 6 Operation
CAUTION Never operate the antenna system without proper purging and constant positive dry gas pressure. Shively Labs will not accept responsibility for antenna failure after operation without proper purging or positive pressure of dry air or dry nitrogen. -
Page 27: Chapter 7 Troubleshooting
Troubleshooting 7 Troubleshooting Precautions WARNING Troubleshooting should be performed only by personnel experi- enced in RF systems and familiar with this equipment. WARNING The broadcast industry has recently recognized the potential med- ical hazards of intense radio frequency radiation. Don't expose personnel to personal harm. -
Page 28: Broad Spectrum Rf Noise
Cures: Wrong antenna for the application Contact your sales representa- and frequency. Occasionally a cus- tive at Shively Labs. tomer provides wrong data to Shively or buys a used antenna designed for another application. Split bullet in the transmission line or... -
Page 29: Erratic Vswr
Hold as much vacuum as you can for 24 hours, then check VSWR again. e. If VSWR is still erratic, contact Shively Labs. Change in Coverage Changes in broadcast coverage may be caused by the same factors that produce VSWR changes. - Page 30 Troubleshooting Table 6. Troubleshooting Pressure Loss or Excessive Gas Usage Possible Causes: Cures: Mechanical damage to cables, Replace damaged components. power dividers, or radiators. Check for leaks using soap solu- tion.
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Page 31: Maintenance Log
Maintenance 8 Maintenance Precautions WARNING Maintenance should be performed only by personnel experienced in RF systems and familiar with this equipment. WARNING The broadcast industry has recently recognized the potential med- ical hazards of intense radio frequency radiation. Don't expose personnel to personal harm. -
Page 32: Return Policy
Maintenance Keep an eye on dry gas usage. A sudden increase in usage indicates a leak in the system. Troubleshoot per Chapter Paint The radiators should never be painted (a coating of paint affects VSWR), and they need no surface protection, since they are made of stainless. -
Page 33: Sample Maintenance Log
Maintenance Sample Maintenance Log DATE VSWR GAS PRESS OBSERVATIONS Visual Inspection of Antenna, Obstruction Lighting; Hard- ware Checked; Tower Repairs Accomplished; etc.
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