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howto:hambasics:intro [2019/12/12 18:29] – [Hz] va7fi | howto:hambasics:sections:intro [2022/09/13 22:35] – [Table] va7fi |
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* At 2.4 GHz (or 2400 MHz) and 5 GHz (or 5000 Mhz), you'd be interfering with WiFi signals. | * At 2.4 GHz (or 2400 MHz) and 5 GHz (or 5000 Mhz), you'd be interfering with WiFi signals. |
* Between 30 and 120 THz (30,000 and 120,000 GHz), you'd be in the mid-infrared range and your antenna would start to feel warm. | * Between 30 and 120 THz (30,000 and 120,000 GHz), you'd be in the mid-infrared range and your antenna would start to feel warm. |
* At <fc #ff0000>400 THz</fc>, the antenna would start glowing red. By increasing the frequency, you'd go through all the colours of the <fc #ff0000>r</fc><fc #ffa500>a</fc><fc #ffff00>i</fc><fc #008000>n</fc><fc #4682b4>b</fc><fc #9400d3>o</fc><fc #800080>w</fc> until the last purple would vanish around <fc #800080>790 THz</fc>. | * At <fc #ff0000>400 THz</fc>, the antenna would start glowing red.((As we'll see later, the "antenna" would also get smaller, the higher the frequency. So you can think of the rods and cones in your eyes as antennas tuned to the colours we can see.)) By increasing the frequency, you'd go through all the colours of the <fc #ff0000>r</fc><fc #ffa500>a</fc><fc #ffff00>i</fc><fc #008000>n</fc><fc #4682b4>b</fc><fc #9400d3>o</fc><fc #800080>w</fc> until the last purple would vanish around <fc #800080>790 THz</fc>. |
* Between 790 THz and 30 PHz (30,000 THz) you'd create UV rays, which are invisible but could blind you. | * Between 790 THz and 30 PHz (30,000 THz) you'd create UV rays, which are invisible but could blind you. |
* Between 30 PHz and 30 EHz (30,000 PHz) you'd create X-rays, which we could be used to take pictures of your bones. | * Between 30 PHz and 30 EHz (30,000 PHz) you'd create X-rays, which we could be used to take pictures of your bones. |
</WRAP> | </WRAP> |
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Let's now unpack some terms and symbols we just saw... | Let's now unpack some of what we just saw... |
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===== Hz ===== | ===== Hz ===== |
* Above radio waves are Microwaves, Infrared, <fc #ff0000>V</fc><fc #ffa500>i</fc><fc #ffff00>s</fc><fc #008000>i</fc><fc #4682b4>b</fc><fc #9400d3>l</fc><fc #800080>e</fc> light, UV, Xray, and Gamma-rays. | * Above radio waves are Microwaves, Infrared, <fc #ff0000>V</fc><fc #ffa500>i</fc><fc #ffff00>s</fc><fc #008000>i</fc><fc #4682b4>b</fc><fc #9400d3>l</fc><fc #800080>e</fc> light, UV, Xray, and Gamma-rays. |
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Now, let's look at where Ham radio frequencies are on that spectrum. | Next, let's look at where Ham radio frequencies are on that spectrum. |
===== Ham Bands Overview ===== | ===== Ham Bands Overview ===== |
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* <fc #4682b4>In blue are CB bands, which don't require any qualification but can only be used with unmodified CB radios at relatively low power (for reference).</fc> | * <fc #4682b4>In blue are CB bands, which don't require any qualification but can only be used with unmodified CB radios at relatively low power (for reference).</fc> |
* <fc #ff0000>In red are the AM and FM radio broadcasting bands (for reference).</fc> | * <fc #ff0000>In red are the AM and FM radio broadcasting bands (for reference).</fc> |
* <fc #800000>In maroon are VHF and UHF TV channels (for reference).</fc> | * <fc #800000>In maroon are the old VHF (1-13) and UHF (14-50) TV channels.</fc>((Remember those? ([[https://www.pinterest.ca/pin/431430839273040262/|source]]) \\ {{:howto:hambasics:sections:tvbuttons.jpg}})) |
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We'll explore this in much more detail later, but for now, the important concept is that to transmit a signal, the radio must transmit over a **range** of frequencies, not just one single frequency. This range is called //bandwidth//. | We'll explore this in much more detail later, but for now, the important concept is that to transmit a signal, the radio must transmit over a **range** of frequencies, not just one single frequency. This range is called //bandwidth//. |
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In addition to only being allowed to transmit on specific frequencies, ham operators also have to make sure that they don't transmit over a greater bandwidth than allowed for the specific frequencies. That is, there are restrictions on //where// we transmit on the spectrum as well as //how wide// the transmissions are. | In addition to only being allowed to transmit on specific frequencies, ham operators also have to make sure that they don't transmit over a greater bandwidth than allowed for the specific frequencies. |
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| <WRAP center round tip 80%> |
| That is, there are restrictions on //where// we transmit on the spectrum as well as //how wide// the transmissions are. |
| </WRAP> |
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This is important because different modes have different bandwidth requirements. From lowest to highest: | This is important because different modes have different bandwidth requirements. From lowest to highest: |
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| {{ scope01.png}} |
| <WRAP indent> |
| |< 300px >| |
^Mode ^Required Bandwidth | | ^Mode ^Required Bandwidth | |
|CW |30 Hz | | |CW |~300 Hz | |
|300 Baud Packet |~600 Hz | | |300 Baud Packet |~600 Hz | |
|SSB Voice |2.8 kHz | | |SSB Voice |2.7 kHz | |
|Slow Scan TV |3 kHz | | |Slow Scan TV |3 kHz | |
|AM Voice |6 kHz | | |AM Voice |6 kHz | |
|FM Voice |20 kHz | | |FM Voice |20 kHz | |
|Fast Scan TV |6 MHz | | |Fast Scan TV |6 MHz | |
| </WRAP> |
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| We'll look at that picture in more details soon, but for now, let's just point out how the AM signal is twice as wide as the SSB signal. |
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===== Certificate Qualifications Overview ===== | ===== Certificate Qualifications Overview ===== |
* Advanced is a different test that require more electronics. | * Advanced is a different test that require more electronics. |
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|<100% 34% 22% 23% 22% >| | <WRAP indent> |
^Privilege ^ Basic ^ Basic with Honours or \\ Basic + Morse 5wpm ^ Basic + Advanced | | ^Privilege ^ Basic ^ Basic with Honours or \\ Basic + Morse 5wpm ^ Basic + Advanced | |
^Frequencies above 30 MHz | <fc #008000>Y</fc> | <fc #008000>Y</fc> | <fc #008000>Y</fc> | | ^Frequencies above 30 MHz | <fc #008000>Y</fc> | <fc #008000>Y</fc> | <fc #008000>Y</fc> | |
^Manage a repeater | <fc #ff0000>N</fc> | <fc #ff0000>N</fc> | <fc #008000>Y</fc> | | ^Manage a repeater | <fc #ff0000>N</fc> | <fc #ff0000>N</fc> | <fc #008000>Y</fc> | |
^Remote Control Radios | <fc #ff0000>N</fc> | <fc #ff0000>N</fc> | <fc #008000>Y</fc> | | ^Remote Control Radios | <fc #ff0000>N</fc> | <fc #ff0000>N</fc> | <fc #008000>Y</fc> | |
| </WRAP> |
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===== Full Frequency List ===== | ===== Full Frequency List ===== |
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Here is the full frequency list. | Here is the full frequency list. <wrap hi>Highlighted information might be on the test.</wrap> |
* The **Band** name is given in meter or cm. You'll need to know them. | * The **Band** name is given in meter or cm. You'll need to know them. |
* The **Maximum Bandwidth** is the maximum width of the radio signal. You'll also need to know these. | * The **Maximum Bandwidth** is the maximum width of the radio signal. You'll also need to know these. |
* <fc #008000>"B" means Basic</fc>, and | * <fc #008000>"B" means Basic</fc>, and |
* <fc #ffa500>"B+" means Basic with Honours, or Basic with Morse, or Basic with Advanced</fc>. | * <fc #ffa500>"B+" means Basic with Honours, or Basic with Morse, or Basic with Advanced</fc>. |
* The **Notes** in the last column are <wrap important>really important</wrap> since some bands have restrictions you need to be aware of. | * The **Notes** in the last column are really important since some bands have restrictions you need to be aware of. |
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|< 100% >| | <WRAP indent> |
^ ^Band ^ Range (MHz) ^Max \\ Bandwidth ^License ^ Notes ^ | ^ ^ Band ^ Range (MHz) ^ Max \\ Bandwidth ^ License ^ Notes ^ |
|LF |2200m | 0.1357 -- 0.1378 | 100 Hz | <fc #ffa500>B +</fc> |D, 1| | | LF | 2200m | 0.1357 -- 0.1378 | 100 Hz | <fc #ffa500>B +</fc> | <wrap hi>D</wrap>, 1 | |
|MF |160m | 1.8 -- 2.0 | 6 kHz | <fc #ffa500>B +</fc> | | | LF | 630m | 0.472 -- 0.479 | 1 kHz | <fc #ffa500>B +</fc> | FIXME | |
|HF |80m | 3.5 -- 4.0 | 6 kHz | <fc #ffa500>B +</fc> | | | MF | <wrap hi>160m</wrap> | <wrap hi>1.8 -- 2.0</wrap> | 6 kHz | <fc #ffa500>B +</fc> | | |
|HF |60m | 5.332, 5.348, 5.3585, \\ 5.373, 5.405 | 2.8 kHz | <fc #ffa500>B +</fc> |2| | | HF | <wrap hi>80m</wrap> | <wrap hi>3.5 -- 4.0</wrap> | 6 kHz | <fc #ffa500>B +</fc> | | |
|HF |40m | 7.0 -- 7.3 | 6 kHz | <fc #ffa500>B +</fc> |3| | | HF | 60m | 5.332, 5.348, 5.3515 -- 5.3665, \\ 5.373, 5.405 | 2.8 kHz | <fc #ffa500>B +</fc> | 2 | |
|HF |30m | 10.10 -- 10.15 | 1 kHz | <fc #ffa500>B +</fc> |D, 4| | | HF | <wrap hi>40m</wrap> | <wrap hi>7.0 -- 7.3</wrap> | <wrap hi>6 kHz</wrap> | <fc #ffa500>B +</fc> | 3 | |
|HF |20m | 14.00 -- 14.35 | 6 kHz | <fc #ffa500>B +</fc> | | | HF | 30m | 10.10 -- 10.15 | <wrap hi>1 kHz</wrap> | <fc #ffa500>B +</fc> | <wrap hi>D</wrap>, 4 | |
|HF |17m | 18.068 -- 18.168 | 6 kHz | <fc #ffa500>B +</fc> | | | HF | <wrap hi>20m</wrap> | <wrap hi>14.00 -- 14.35</wrap> | <wrap hi>6 kHz</wrap> | <fc #ffa500>B +</fc> | | |
|HF |15m | 21.00 -- 21.45 | 6 kHz | <fc #ffa500>B +</fc> | | | HF | 17m | 18.068 -- 18.168 | <wrap hi>6 kHz</wrap> | <fc #ffa500>B +</fc> | | |
|HF |12m | 24.89 -- 24.99 | 6 kHz | <fc #ffa500>B +</fc> | | | HF | <wrap hi>15m</wrap> | <wrap hi>21.00 -- 21.45</wrap> | <wrap hi>6 kHz</wrap> | <fc #ffa500>B +</fc> | | |
|HF |10m | 28.00 -- 29.7 | 20 kHz | <fc #ffa500>B +</fc> | | | HF | 12m | 24.89 -- 24.99 | <wrap hi>6 kHz</wrap> | <fc #ffa500>B +</fc> | | |
|VHF |6m | 50 -- 54 | 30 kHz | <fc #008000>B</fc> | | | HF | <wrap hi>10m</wrap> | <wrap hi>28.00 -- 29.7</wrap> | <wrap hi>20 kHz</wrap> | <fc #ffa500>B +</fc> | | |
|VHF |2m | 144 -- 148 | 30 kHz | <fc #008000>B</fc> | | | VHF | 6m | 50 -- 54 | <wrap hi>30 kHz</wrap> | <fc #008000>B</fc> | | |
|VHF |135cm | 219 -- 225 | 100 kHz | <fc #008000>B</fc> |5| | | VHF | 2m | 144 -- 148 | <wrap hi>30 kHz <sup>¥</sup></wrap> | <fc #008000>B</fc> | | |
|UHF |70cm | 430 -- 450 | 12 MHz | <fc #008000>B</fc> |☆| | | VHF | 135cm | 219 -- 225 | 100 kHz | <fc #008000>B</fc> | 5 | |
|UHF |35cm | 902 -- 928 | 12 MHz | <fc #008000>B</fc> |☆| | | UHF | 70cm | <wrap hi>430 -- 450</wrap> | 12 MHz | <fc #008000>B</fc> | <wrap hi>☆</wrap> | |
^ ^ ^ Range (GHz) ^ ^ ^ ^ | | UHF | 35cm | <wrap hi>902 -- 928 <sup>§</sup></wrap> | 12 MHz | <fc #008000>B</fc> | <wrap hi>☆</wrap> | |
|UHF | | 1.24 -- 1.30 | | <fc #008000>B</fc> |☆| | ^ ^ ^ Range (GHz) ^ ^ ^ ^ |
|UHF | | 2.30 -- 2.45 | | <fc #008000>B</fc> |☆| | | UHF | | 1.24 -- 1.30 | | <fc #008000>B</fc> | ☆ | |
|SHF | | 3.3 -- 3.5 | | <fc #008000>B</fc> |☆| | | UHF | | <wrap hi>2.30 -- 2.45 <sup>‡</sup></wrap> | | <fc #008000>B</fc> | <wrap hi>☆</wrap> | |
|SHF | | 5.650 -- 5.925 | | <fc #008000>B</fc> |☆| | | SHF | | 3.3 -- 3.5 | | <fc #008000>B</fc> | ☆ | |
|SHF | | 10.0 -- 10.5 | | <fc #008000>B</fc> |☆| | | SHF | | 5.650 -- 5.925 | | <fc #008000>B</fc> | ☆ | |
|SHF | | 24.00 -- 24.05 | | <fc #008000>B</fc> | | | | SHF | | 10.0 -- 10.5 | | <fc #008000>B</fc> | ☆ | |
|SHF | | 24.05 -- 24.25 | | <fc #008000>B</fc> |☆ | | | SHF | | 24.00 -- 24.05 | | <fc #008000>B</fc> | | |
|EHF | | 47.0 -- 47.2 | | <fc #008000>B</fc> |☆ | | | SHF | | 24.05 -- 24.25 | | <fc #008000>B</fc> | ☆ | |
|EHF | | 76.0 -- 77.5 | | <fc #008000>B</fc> |☆ | | | EHF | | 47.0 -- 47.2 | | <fc #008000>B</fc> | ☆ | |
|EHF | | 77.5 -- 78.0 | | <fc #008000>B</fc> | | | | EHF | | 76.0 -- 77.5 | | <fc #008000>B</fc> | ☆ | |
|EHF | | 78.0 -- 81.0 | | <fc #008000>B</fc> |☆ | | | EHF | | 77.5 -- 78.0 | | <fc #008000>B</fc> | | |
|EHF | | 81.0 -- 81.5 | | <fc #008000>B</fc> |6 | | | EHF | | 78.0 -- 81.0 | | <fc #008000>B</fc> | ☆ | |
|EHF | | 122.25 -- 123.00 | | <fc #008000>B</fc> |☆ | | | EHF | | 81.0 -- 81.5 | | <fc #008000>B</fc> | 6 | |
|EHF | | 134.0 -- 136.0 | | <fc #008000>B</fc> | | | | EHF | | 122.25 -- 123.00 | | <fc #008000>B</fc> | ☆ | |
|EHF | | 136.0 -- 141.0 | | <fc #008000>B</fc> |☆ | | | EHF | | 134.0 -- 136.0 | | <fc #008000>B</fc> | | |
|EHF | | 241.0 -- 248.0 | | <fc #008000>B</fc> |☆ | | | EHF | | 136.0 -- 141.0 | | <fc #008000>B</fc> | ☆ | |
|EHF | | 248.0 -- 250.0 | | <fc #008000>B</fc> | | | | EHF | | 241.0 -- 248.0 | | <fc #008000>B</fc> | ☆ | |
| | EHF | | 248.0 -- 250.0 | | <fc #008000>B</fc> | | |
| </WRAP> |
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| * <wrap hi><sup>¥</sup></wrap> Since Fast Scan TV requires 6 MHz of bandwidth, it can't be transmitted below the 70cm band. |
| * <wrap hi><sup>§</sup></wrap> The 902 -- 928 MHz band may be heavily occupied by licence exempt devices, which are lower power devices that don't require a license but can't be interered with (like cordless phones) |
| * <wrap hi><sup>‡</sup></wrap> The 2.30 -- 2.45 GHz band is shared with Industrial Scientific Medical (ISM) licence exempt devices. |
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Non-ham frequencies for comparison: | Non-ham frequencies for comparison: |
| <WRAP indent> |
^ ^^ Range (MHz) ^ Details ^^^ | ^ ^^ Range (MHz) ^ Details ^^^ |
|MF || 0.535 -- 1.705 | AM Radio ||| | |MF || 0.535 -- 1.705 | AM Radio ||| |
|UHF || 467.5625 -- 467.7125 | FRS (channels 8 -- 13) ||| | |UHF || 467.5625 -- 467.7125 | FRS (channels 8 -- 13) ||| |
|UHF || 470 -- 692 | UHF TV Channels (14 -- 50)((Channel 37 (608 -- 614 MHz) is reserved for Radio Astronomy so there are no TV broadcasts there. See: [[wp>Channel_37]])) ||| | |UHF || 470 -- 692 | UHF TV Channels (14 -- 50)((Channel 37 (608 -- 614 MHz) is reserved for Radio Astronomy so there are no TV broadcasts there. See: [[wp>Channel_37]])) ||| |
| </WRAP> |
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Name of frequency ranges: | Name of frequency ranges: |
| <WRAP indent> |
^Name ^ Abbreviation ^ Frequency Range | | ^Name ^ Abbreviation ^ Frequency Range | |
|Very Low Frequency | VLF | 3 -- 30 kHz | | |Very Low Frequency | VLF | 3 -- 30 kHz | |
|Super High Frequency| SHF | 3 -- 30 GHz | | |Super High Frequency| SHF | 3 -- 30 GHz | |
|Extremely High Frequency | EHF | 30 -- 300 GHz | | |Extremely High Frequency | EHF | 30 -- 300 GHz | |
| </WRAP> |
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===== Important Notes ===== | ===== Important Notes ===== |
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Information quoted here was taken from the [[http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01226.html#t1 |ISEDC]] website. | Information quoted here was taken from ISED's [[https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf10650.html|RBR-4]]. |
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^D | For the 2200m and 30m bands, the maximum bandwidth allowed is too narrow for phone (voice) transmissions. Therefore, only digital or CW modes are allowed. | | |
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^☆ | "means that transmissions shall not cause interference nor be protected from interference from stations licensed in other services operating in that band. Operating provisions defined below are excerpts from the [[http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/h_sf01678.html | Canadian Table of Frequency Allocations]], which is amended from time to time." \\ \\ Basically, this means that the Amateur Radio Service is secondary to some other service and that we must yield the frequency when they need it. We must not cause interference to these other services, and we must accept that they have first priority and may interfere with us at anytime.| | |
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^1 | "Stations in the amateur service using frequencies in the band 135.7 -- 137.8 kHz shall not exceed a maximum radiated power of 1 W (e.i.r.p.) and shall not cause harmful interference to stations of the radionavigation service." \\ \\ This is the 2200m band referred to in **Note D**. It is mostly used for experimental purposes and transmissions must be at very low power and can't cause interference. | | |
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^2 | "Amateur service operators may transmit on the following five centre frequencies: 5332 kHz, 5348 kHz, 5358.5 kHz, 5373 kHz, and 5405 kHz. Amateur stations are allowed to operate with a maximum effective radiated power of 100 W PEP and are restricted to the following emission modes and designators: telephony (2K80J3E), data (2K80J2D), RTTY (60H0J2B) and CW (150HA1A). Transmissions may not occupy more than 2.8 kHz centred on these five frequencies. Such use is **not** in accordance with international frequency allocations. Canadian amateur operations shall not cause interference to fixed and mobile operations in Canada or in other countries and, if such interference occurs, the amateur service may be required to cease operations. The amateur service in Canada may not claim protection from interference by the fixed and mobile operations of other countries" \\ \\ This band is composed of 5 discrete channels and transmission is restricted to these exact frequencies. Other amateurs around the world do not have permission to transmit on these frequencies so Canadian amateurs are secondary users, which mean that they must stop transmitting if they interfere with other users. | | |
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^3| "The use of the band 7.200 -- 7.300 MHz in Region 2 (North America) by the amateur service shall not impose constraints on the broadcasting service intended for use within Region 1 and Region 3 (Europe and Asia)." \\ \\ Although Amateurs are allowed to transmit between 7.200 -- 7.300 MHz in North America, they'll have to work around foreign broadcasting stations who also use this section of the spectrum. | | |
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^4 | "The use of the band 10.100 -- 10.150 MHz by the amateur service in Canada is not in accordance with the international frequency allocations. Canadian amateur operations shall not cause interference to fixed service operations of other administrations and if such interference should occur, the amateur service may be required to cease operations. The amateur service in Canada may not claim protection from interference by the fixed service operations of other administrations." \\ \\ Other amateurs around the world do not have permission to transmit on these frequencies so Canadian amateurs are secondary users, which mean that they must stop transmitting if they interfere with other users. | | |
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^5 | "In the band 219 -- 220 MHz, the amateur service is permitted on a secondary basis. In the band 220 -‑ 222 MHz, the amateur service may be permitted in exceptional circumstances on a secondary basis to assist in disaster relief efforts." | | |
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^6 | "The 81.0 -- 81.5 GHz band is also allocated to the amateur and amateur-satellite services on a secondary basis." | | ^ <wrap hi>D</wrap> | For the 2200m and 30m bands, the maximum bandwidth allowed is too narrow for phone (voice) transmissions. Therefore, only digital or CW modes are allowed. | |
| ^ <wrap hi>☆</wrap> | Secondary User "means that transmissions shall not cause interference nor be protected from interference from stations licensed in other services operating in that band. Operating provisions defined below are excerpts from the [[http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/h_sf01678.html| Canadian Table of Frequency Allocations]], which is amended from time to time." \\ \\ Basically, this means that the Amateur Radio Service is secondary to some other service and that we must yield the frequency when they need it. We must not cause interference to these other services, and we must accept that they have first priority and may interfere with us at anytime. | |
| ^ 1 | "Stations in the amateur service using frequencies in the band 135.7 -- 137.8 kHz shall not exceed a maximum radiated power of 1 W (e.i.r.p.) and shall not cause harmful interference to stations of the radionavigation service." \\ \\ This is the 2200m band referred to in **Note D**. It is mostly used for experimental purposes and transmissions must be at very low power and can't cause interference. | |
| ^ 2 | "Amateur service operators may transmit in the frequency band 5351.5 -- 5366.5 kHz and on the following four centre frequencies: 5332 kHz, 5348 kHz, 5373 kHz and 5405 kHz. Amateur stations are allowed to operate with a maximum effective radiated power of 100 W PEP in each channel and are restricted to the following emission modes and designators: telephony (2K80J3E), data (2K80J2D), RTTY (60H0J2B) and CW (150HA1A). Transmissions in any channel may not occupy a bandwidth of more than 2.8 kHz. Such use is not in accordance with international frequency allocations. Canadian amateur operations shall not cause interference to fixed and mobile operations in Canada or in other countries and, if such interference occurs, the amateur service may be required to cease operations. The amateur service in Canada may not claim protection from interference by the fixed and mobile operations of other countries." \\ \\ This band is composed of 5 discrete channels and transmission is restricted to these exact frequencies. Other amateurs around the world do not have permission to transmit on these frequencies so Canadian amateurs are secondary users, which mean that they must stop transmitting if they interfere with other users. | |
| ^ 3 | "The use of the band 7.200 -- 7.300 MHz in Region 2 (North America) by the amateur service shall not impose constraints on the broadcasting service intended for use within Region 1 and Region 3 (Europe and Asia)." \\ \\ Although Amateurs are allowed to transmit between 7.200 -- 7.300 MHz in North America, they'll have to work around foreign broadcasting stations who also use this section of the spectrum. | |
| ^ 4 | "The use of the band 10.100 -- 10.150 MHz by the amateur service in Canada is not in accordance with the international frequency allocations. Canadian amateur operations shall not cause interference to fixed service operations of other administrations and if such interference should occur, the amateur service may be required to cease operations. The amateur service in Canada may not claim protection from interference by the fixed service operations of other administrations." \\ \\ Other amateurs around the world do not have permission to transmit on these frequencies so Canadian amateurs are secondary users, which mean that they must stop transmitting if they interfere with other users. | |
| ^ 5 | "In the band 219 -- 220 MHz, the amateur service is permitted on a secondary basis. In the band 220 -‑ 222 MHz, the amateur service may be permitted in exceptional circumstances on a secondary basis to assist in disaster relief efforts." | |
| ^ 6 | "The 81.0 -- 81.5 GHz band is also allocated to the amateur and amateur-satellite services on a secondary basis." | |
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[[sections |{{/back.png }}]] [[wavemodulation |{{ /next.png}}]] | [[..:sections|{{/back.png }}]] [[wavemodulation|{{ /next.png}}]] |