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'''Before getting started you may want to study or refresh your knowledge
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'''Before getting started, you will want to study or refresh your knowledge of [http://en.wikipedia.org/wiki/Kirchhoff's_circuit_laws Kirchhoff's Law], [http://en.wikipedia.org/wiki/Ohm's_law Ohm's Law] and [http://www.angelfire.com/ri/dcvoltage/powerwatts.html Watts Law]'''
of [http://en.wikipedia.org/wiki/Kirchhoff's_circuit_laws Kirchhoff's Law], [http://en.wikipedia.org/wiki/Ohm's_law Ohm's Law] and [http://www.angelfire.com/ri/dcvoltage/powerwatts.html Watts Law]'''
 
  
 
==Electricity Supply==
 
==Electricity Supply==
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'''How to calculate what size battery system is needed for emergency backup'''<br/>
 
'''How to calculate what size battery system is needed for emergency backup'''<br/>
 
1. Find the current drain in Amps during transmit, receive and stand-by operation for each piece of equpment you will be attaching to the battery backup system.
 
1. Find the current drain in Amps during transmit, receive and stand-by operation for each piece of equpment you will be attaching to the battery backup system.
This usually can be found in owners manual specs page or on the internet.
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This usually can be found in owners manual specs page or on the internet.
 +
 
 
2. Determine the equipment's [http://en.wikipedia.org/wiki/Duty_cycle Duty Cycle].
 
2. Determine the equipment's [http://en.wikipedia.org/wiki/Duty_cycle Duty Cycle].
 
Duty Cycle is expressed as a series of three percentages:<br/>
 
Duty Cycle is expressed as a series of three percentages:<br/>
'''Transmit''' | '''Receive''' | '''Stand-By''' | '''Device'''
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{|cellpadding="10" cellspacing="0" border="1"
.00 | .80 | .20 for a Scanner (low)
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!Transmit
.50 | .50 | .90 For a Transceiver (Medium)
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!Receive
1.0 | .00 | .00  For a Transmitter TV broadcast (High)
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!Stand-By
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!Device
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|-
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| 0 || 80 || 20 || for a Scanner (low)
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|-
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| 5 || 5 || 90 || For a Transceiver (Medium)
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|-
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| 100 || 0 || 0 || For a Transmitter TV broadcast (High)
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|}
  
 
3. Use the following formula to calculate the average current required '''per device'''.
 
3. Use the following formula to calculate the average current required '''per device'''.
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==Grounding==
 
==Grounding==
[[Grounding_Bulkhead_with_supressors_for_your_scanning_station | Coax Grounding]]
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[[Grounding_Bulkhead_with_supressors_for_your_scanning_station | Coax Grounding]] Grounding Bulkhead with supressors for your scanning station<br/>
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*[http://standards.ieee.org/colorbooks/sampler/greenbook.html IEEE Std 142™ Recommended Practice for Grounding of Industrial and Commercial Power Systems.]
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*[http://www.nfpa.org/catalog/product.asp?pid=78008 NFPA 780: Standard for the Installation of Lightning Protection Systems]
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*[http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=70&EditionID=238 2008 National Electrical Code online - Requires Site Registration]
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*[http://www.polyphaser.com/technical_notes.htm List of PolyPhaser tech notes on Grounding PDF format]
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 +
==Reference Material==
 +
 
 +
===Books===
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* Newton's Telecom Dictionary, 25th Edition ISBN 0979387337
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* The ARRL Handbook for Radio Communications ISBN 0872591441
  
==Manuals==
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===Manuals===
 
'''General Electric'''
 
'''General Electric'''
 
Lynchburg Book of Instructions (LBI) Term for GE Manuals<br/>
 
Lynchburg Book of Instructions (LBI) Term for GE Manuals<br/>
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#[http://circuitcalculator.com/wordpress/2007/09/20/wire-parameter-calculator/ Gives the current carrying ability for wires and wire bundles based on their AWG and Metric.]
 
#[http://circuitcalculator.com/wordpress/2007/09/20/wire-parameter-calculator/ Gives the current carrying ability for wires and wire bundles based on their AWG and Metric.]
  
==External Links==
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==Related Wiki Pages==
 +
* [[FCC and FAA Tower Marking and Lighting Requirements]]
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* [[Grounding Bulkhead with supressors for your scanning station]]
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==Related External Links==
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* [http://www.allaboutcircuits.com/tools/ Calculators for Electrical Engineers]
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* [https://diyhacking.com/ Maker site including RF and other electronics projects.]
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* [http://www.calculatoredge.com/#electrical Electrical Engineering Calculators]
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* [http://www.calculatoredge.com/#electronics Electronics Engineering Calculators]
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* [http://urgentcomm.com/mag/radio_mobile_radio_installation/ Urgent Communications Mobile Radio Install Tips]
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* [http://vtsociety.org IEEE Vehicular Technology Society]
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* [http://www.mecp.com/home.asp National training & certification program for the mobile electronics professional]
 
* [http://www.repeater-builder.com/rbtip/radiositerules.html Repeater-Builder's Radio Site Standards]
 
* [http://www.repeater-builder.com/rbtip/radiositerules.html Repeater-Builder's Radio Site Standards]
 +
* [http://www.tiaonline.org/index.cfm Telecommunications Industry Association Online]
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 +
 +
 +
 +
 +
 +
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Return to Wiki page: [[Special Topics]]<br/>
 +
<small>(No matching DB page)</small><br/>
  
[[Category:Help]]
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[[Category:HF Equipment]]
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[[Category:HF Glossary]]
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[[Category:Amateur Radio FAQ]]
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[[Category:Scanners FAQ]]

Latest revision as of 21:42, 7 May 2017

Before getting started, you will want to study or refresh your knowledge of Kirchhoff's Law, Ohm's Law and Watts Law

Electricity Supply

Alternating Current (Mains)

Direct Current (Battery)

UPS & Battery Backup

How to calculate what size battery system is needed for emergency backup
1. Find the current drain in Amps during transmit, receive and stand-by operation for each piece of equpment you will be attaching to the battery backup system. This usually can be found in owners manual specs page or on the internet.

2. Determine the equipment's Duty Cycle. Duty Cycle is expressed as a series of three percentages:

Transmit Receive Stand-By Device
0 80 20 for a Scanner (low)
5 5 90 For a Transceiver (Medium)
100 0 0 For a Transmitter TV broadcast (High)

3. Use the following formula to calculate the average current required per device.

  • Where i is the DC current in Amperes required during transmit (TX), receive (RX), and stand-by (SB)
  • Where %Duty is the duty cycle represented as .xx ie. .50 is 50%
Average Current in Amps = (I_TX)(%Duty)+(I_RX)(%Duty)+(I_SB)(%Duty) 

4. To determine the battery size required, multiply the average current in Amps by the number of hours of backup power required.

Battery/UPS Size = (Average Current in Amps)x(Number of hours backup power required)

Grounding

Coax Grounding Grounding Bulkhead with supressors for your scanning station

Reference Material

Books

  • Newton's Telecom Dictionary, 25th Edition ISBN 0979387337
  • The ARRL Handbook for Radio Communications ISBN 0872591441

Manuals

General Electric Lynchburg Book of Instructions (LBI) Term for GE Manuals
All LBI manuals are in Adobe PDF format and under 5Mb

Motorola R56 Standards and Guidelines for Communications Sites

Tools

  1. Gives the current carrying ability for wires and wire bundles based on their AWG and Metric.

Related Wiki Pages

Related External Links




Return to Wiki page: Special Topics
(No matching DB page)