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Subelement E1
Section E1B
Station restrictions and special operations: restrictions on station location; general operating restrictions; spurious emissions; antenna structure restrictions; RACES operations
Which of the following constitutes a spurious emission?
  • An amateur station transmission made without the proper call sign identification
  • A signal transmitted to prevent its detection by any station other than the intended recipient
  • Any transmitted signal that unintentionally interferes with another licensed radio station
  • Correct Answer
    An emission outside the signal's necessary bandwidth that can be reduced or eliminated without affecting the information transmitted

Spurious is defined as "Not being what it purports to be; false or fake"

Spurious emissions are "false" emissions that accompany legitimate emissions. Usually they are caused by a poorly calibrated or faulty transmitter. On a spectrum analyzer they would show up as being spikes of RF energy sometimes adjacent to the real signal and sometimes at random intervals usually close by.

These emissions are "spurious" or "false" because they are not necessary to receive the information and they are outside the normal bandwidth needed for the signal.

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Tags: noise and interference bandwidth arrl chapter 3 arrl module 3a

Which of the following is an acceptable bandwidth for Digital Radio Mondiale (DRM) based voice or SSTV digital transmissions made on the HF amateur bands?
  • Correct Answer
    3 kHz
  • 10 kHz
  • 15 kHz
  • 20 kHz

Remember that SSTV (Slow Scan TV) transmissions have to fit into the same bandwidth as common SSB voice transmission.


Just like any SSTV transmission, 3 KHz is an acceptable bandwidth.

Answer: 3KHz


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Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?
  • Correct Answer
    1 mile
  • 3 miles
  • 10 miles
  • 30 miles

§ 97.13 Restrictions on station location.

(b) A station within 1600 m (1 mile) of an FCC monitoring facility must protect that facility from harmful interference. Failure to do so could result in imposition of operating restrictions upon the amateur station by a District Director pursuant to § 97.121 of this part. Geographical coordinates of the facilities that require protection are listed in § 0.121(c) of this chapter.

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What must be done before placing an amateur station within an officially designated wilderness area or wildlife preserve, or an area listed in the National Register of Historic Places?
  • A proposal must be submitted to the National Park Service
  • A letter of intent must be filed with the Environmental Protection Agency
  • Correct Answer
    An Environmental Assessment must be submitted to the FCC
  • A form FSD-15 must be submitted to the Department of the Interior

You only need to work with the FCC. Go to their website www.fcc.gov and search for "Environmental Assessment" and the forms will be listed.

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Tags: arrl chapter 3 arrl module 3a

What is the National Radio Quiet Zone?
  • An area in Puerto Rico surrounding the Arecibo Radio Telescope
  • An area in New Mexico surrounding the White Sands Test Area
  • Correct Answer
    An area surrounding the National Radio Astronomy Observatory
  • An area in Florida surrounding Cape Canaveral

Private land mobile radio services, 47 C.F.R. § 97.3 (2010):

(32) National Radio Quiet Zone. The area in Maryland, Virginia and West Virginia Bounded by 39°15′ N on the north, 78°30′ W on the east, 37°30′ N on the south and 80°30′ W on the west.



page 589

From Wikipedia:

The United States National Radio Quiet Zone is a large area of land surrounding the National Radio Astronomy Observatory (NRAO) at Green Bank, West Virginia, and especially the large Green Bank Telescope radio telescope. The Radio Quiet Zone is a rectangle of land approximately 13,000 square miles (34,000 km2) in size that straddles the border area of Virginia and West Virginia. It includes all land with latitudes between 37.5°N and 39.25°N and longitudes between 78.5°W and 80.5°W. This area was chosen because it has a hilly topography that screens out most incoming radio signals, allowing the Green Bank telescopes to receive signals that are otherwise too low in power to be heard over the normal radio background in North America.

PNG of Quiet Zone


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Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?
  • Correct Answer
    You may have to notify the Federal Aviation Administration and register it with the FCC as required by Part 17 of the FCC rules
  • You must submit engineering drawings to the FAA
  • You must file an Environmental Impact Statement with the EPA before construction begins
  • You must obtain a construction permit from the airport zoning authority

This is an overlapping jurisdiction question. The FAA regulates Airspace that might endanger aircraft so their regulations need to be consulted and it will then need to registered with the FCC as required by part 17.

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To what type of regulations does PRB-1 apply?
  • Homeowners associations
  • FAA tower height limits
  • Correct Answer
    State and local zoning
  • Use of wireless devices in vehicles

State and local zoning. While there have been attempts to apply it to HOA and other situations, these attempts have not yet succeeded.

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What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receivers involved are of good engineering design?
  • The amateur station must cease operation
  • The amateur station must cease operation on all frequencies below 30 MHz
  • The amateur station must cease operation on all frequencies above 30 MHz
  • Correct Answer
    The amateur station must avoid transmitting during certain hours on frequencies that cause the interference

The FCC may impose limited quiet periods on the amateur station on those frequencies involved. Conversely the amateur station must be operating properly without violating any rules especially regarding spurious emissions.

Hint:. Long question, long answer

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Which amateur stations may be operated under RACES rules?
  • Only those club stations licensed to Amateur Extra Class operators
  • Any FCC-licensed amateur station except a Technician Class
  • Correct Answer
    Any FCC-licensed amateur station certified by the responsible civil defense organization for the area served
  • Any FCC-licensed amateur station participating in the Military Auxiliary Radio System (MARS)

You must first register with the local civil defense organization and then at that point you can register your amateur radio station with RACES. Each operator must follow the operator privileges granted by the license.

§ 97.407 Radio amateur civil emergency service.

(a) No station may transmit in RACES unless it is an FCC-licensed primary, club, or military recreation station and it is certified by a civil defense organization as registered with that organization, or it is an FCC-licensed RACES station. No person may be the control operator of a RACES station, or may be the control operator of an amateur station transmitting in RACES unless that person holds a FCC issued amateur operator license and is certified by a civil defense organization as enrolled in that organization.

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What frequencies are authorized to an amateur station operating under RACES rules?
  • Correct Answer
    All amateur service frequencies authorized to the control operator
  • Specific segments in the amateur service MF, HF, VHF and UHF bands
  • Specific local government channels
  • Military Auxiliary Radio System (MARS) channels

The frequencies that may be used are determined by the control operator's license. Normally RACES stations will communicate with other RACES stations but other stations may be authorized by a responsible civil defense authority.

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What does PRB-1 require of regulations affecting amateur radio?
  • No limitations may be placed on antenna size or placement
  • Correct Answer
    Reasonable accommodations of amateur radio must be made
  • Amateur radio operations must be permitted in any private residence
  • Use of wireless devices in a vehicle is exempt from regulation

PRB-1 is a legal document from the FCC that requires that local governments reasonably accommodate Amateur Radio installations.

According to the ARRL PRB-1 web page:

The FCC's PRB-1 document, an 11 page Amateur Radio Memorandum Opinion and Order, was released September 19, 1985. Even though it is from 1985, it is still valid today. The legal cite is 101 FCC 2d 952 (1985) and it can be found on the FCC Web page.

See the whole document on ARRL's web site here.

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What must the control operator of a repeater operating in the 70 cm band do if a radiolocation system experiences interference from that repeater?
  • Correct Answer
    Cease operation or make changes to the repeater to mitigate the interference
  • File an FAA NOTAM (Notice to Airmen) with the repeater system's ERP, call sign, and six-character grid locator
  • Reduce the repeater antenna HAAT (Height Above Average Terrain)
  • All these choices are correct

The amateur radio service is secondary in this band. This means that amateur stations operating in this band (including repeaters) must eliminate any interference to primary users.

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