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Subelement G2

OPERATING PROCEDURES

Section G2A

Phone operating procedures: USB/LSB conventions, breaking into a contact, transmitter setup for voice operation; answering DX stations

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

  • Correct Answer
    Upper sideband
  • Lower sideband
  • Suppressed sideband
  • Double sideband

To keep bandwidth to a minimum and to make transmissions consistent the upper sideband is used by convention for voice communications on frequencies 14 MHz or higher.

Note: Remember that the HIGHER frequencies (smaller wavelengths) generally use the UPPER sideband. LOWER frequencies (larger wavelengths) generally use the LOWER sideband.

Background info: John Renshaw Carson invented SSB in 1915 (WW1), when the parts needed to make a single sideband radio were much cheaper for LSB at frequencies below 9MHz, and much cheaper for USB at frequencies above 9MHz. 9MHz is the split, and that's why.

So- "Are pre-WW2 SSB radios easy to find? Nein."

Last edited by kd7bbc. Register to edit

Tags: ssb hf operating procedures 20 meters 15 meters 10 meter

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

  • Upper sideband
  • Correct Answer
    Lower sideband
  • Suppressed sideband
  • Double sideband

To make communications consistent and to keep bandwidths to a minimum, the convention is to use lower sideband (LSB) communications for the longer wavelength (lower frequency) bands at 160, 75, and 40 meters.

Note: Just remember that LOWER frequencies (longer wavelengths) generally use the LOWER sideband, and the HIGHER frequencies (shorter wavelengths) generally use the UPPER sideband.

Background info: John Renshaw Carson invented SSB in 1915 (WW1), when the parts needed to make a single sideband radio were much cheaper for LSB at frequencies below 9MHz, and much cheaper for USB at frequencies above 9MHz. 9MHz is the split, and that's why.

So- "Are pre-WW2 SSB radios easy to find? Nein."

Another trick: 160-, 75-, and 40-meter bands are in decreasing order so "Lower Side Band".

Last edited by rstrecker. Register to edit

Tags: ssb hf 160 meters 75/80 meters 40 meters

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

  • Correct Answer
    Upper sideband
  • Lower sideband
  • Suppressed sideband
  • Double sideband

Amateur radio operators normally designate either upper or lower sideband for phone communications on a specific band to keep things consistent and to keep bandwidths reasonable. The Upper Sideband (USB) is most commonly used for SSB voice communications in the VHF (very high frequency) and UHF (ultra high frequency) bands.

Note: Just remember that HIGHER frequencies generally use the UPPER sideband, and LOWER frequencies generally use the LOWER sideband.

Memory Aid: John Renshaw Carson invented SSB in 1915 (WW1), when the parts needed to make a single sideband radio were much cheaper for LSB at frequencies below 9MHz, and much cheaper for USB at frequencies above 9MHz. 9MHz is the split, and that's why.

So- "Are pre-WW2 SSB radios easy to find? Nein."

Last edited by kd7bbc. Register to edit

Tags: ssb vhf uhf voice

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

  • Correct Answer
    Upper sideband
  • Lower sideband
  • Suppressed sideband
  • Double sideband

The 17 and 12 meter bands are some of the higher frequency bands (shorter wavelength) to which general class operators are granted privileges. The convention is to use the Upper Sideband on these frequencies for voice communications.

Note: Just remember that HIGHER frequencies above 10 MHz (< 30m, shorter wavelengths) generally use the UPPER sideband, and LOWER frequencies below 10 MHz (> 30m, longer wavelengths) generally use the LOWER sideband.

Memory Aid: John Renshaw Carson invented SSB in 1915 (WW1), when the parts needed to make a single sideband radio were much cheaper for LSB at frequencies below 9MHz, and much cheaper for USB at frequencies above 9MHz. 9MHz is the split, and that's why.

So- "Are pre-WW1 SSB radios easy to find? Nein."

Last edited by kd7bbc. Register to edit

Tags: 12 meters 17 meters ssb operating procedures

Which mode of voice communication is most commonly used on the HF amateur bands?

  • Frequency modulation
  • Double sideband
  • Correct Answer
    Single sideband
  • Single phase modulation

One of the signal properties that we have to be aware of is signal bandwidth. Single sideband communications are most commonly used on the high frequency amateur bands because they should take up less than 3 kHz of bandwidth.

Last edited by kd7bbc. Register to edit

Tags: voice hf ssb

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

  • Very high-fidelity voice modulation
  • Less subject to interference from atmospheric static crashes
  • Ease of tuning on receive and immunity to impulse noise
  • Correct Answer
    Less bandwidth used and greater power efficiency

Single sideband operations have a number of advantages over other voice communication methods, especially when used for the HF amateur bands. They use much less bandwidth (less than 3 kHz) and they also have a higher power efficiency as the power is directed over a smaller segment of the band.

Last edited by kd7bbc. Register to edit

Tags: ssb bandwidth transmit power voice phone

Which of the following statements is true of single sideband (SSB)?

  • Only one sideband and the carrier are transmitted; the other sideband is suppressed
  • Correct Answer
    Only one sideband is transmitted; the other sideband and carrier are suppressed
  • SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
  • SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands

Single sideband (SSB) voice mode is often used in voice communications because of its smaller bandwidth and higher power efficiency. The smaller bandwidth is accomplished by only transmitting one sideband of the signal; while the other sideband and the carrier wave are suppressed.

Last edited by ngordon1. Register to edit

Tags: ssb voice phone

What is the recommended way to break into a phone contact?

  • Say “QRZ” several times, followed by your call sign
  • Correct Answer
    Say your call sign once
  • Say “Breaker Breaker”
  • Say “CQ” followed by the call sign of either station

You don't need to say "Break", "QRZ" or "CQ" or any other jargon when trying to enter a conversation using voice operations. All you need to do is to listen for a gap in the conversation and then say your call sign during a break between the transmissions from the other stations, so that you can be heard, identified, and invited to join in!

Last edited by gconklin. Register to edit

Tags: operating procedures phone

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

  • Lower sideband is more efficient than upper sideband at these frequencies
  • Lower sideband is the only sideband legal on these frequency bands
  • Because it is fully compatible with an AM detector
  • Correct Answer
    It is commonly accepted amateur practice

There are no hard and fast rules from the FCC, however it is current amateur practice to use the lower sideband (LSB) on the 160, 75 and 40 meter bands.

Note: Just remember that LOWER frequencies (longer wavelengths) generally use the LOWER sideband, while HIGHER frequencies (shorter wavelengths) generally use the UPPER sideband.

Background info: John Renshaw Carson invented SSB in 1915 (WW1), when the parts needed to make a single sideband radio were much cheaper for LSB at frequencies below 9MHz, and much cheaper for USB at frequencies above 9MHz. 9MHz is the split, and that's why.

So- "Are pre-WW2 SSB radios easy to find? Nein."

Last edited by kd7bbc. Register to edit

Tags: ssb best practices 160 meters 75/80 meters 40 meters

Which of the following statements is true of VOX operation versus PTT operation?

  • The received signal is more natural sounding
  • Correct Answer
    It allows “hands freeoperation
  • It occupies less bandwidth
  • It provides more power output

The advantage of using VOX, or a Voice Operated circuit, is that by simply talking into the microphone, the circuit is opened and you are transmitting. VOX allows for "hands free" operation - you dont have to hit the PTT switch!

Last edited by gconklin. Register to edit

Tags: ssb phone

Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

  • Any caller is welcome to respond
  • Only stations in Germany
  • Correct Answer
    Any stations outside the lower 48 states
  • Only contest stations

CQ DX means Calling a station in an outside country or entity, so that means you want to call a contact outside the 48 states

Last edited by kf7pzx. Register to edit

Tags: none

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

  • RF clipping level
  • Correct Answer
    Transmit audio or microphone gain
  • Antenna inductance or capacitance
  • Attenuator level

The transmit audio or microphone gain is typically adjusted for proper ALC setting on an amateur single sideband transceiver.

ALC (Automatic Level Control) is a self-controlling transmitter circuit that attempts to maintain a constant level of output power by automatically adjusting the gain of the final amplifier, to prevent it from overloading and damaging the final stage by excessive drive. An operator would adjust the input signal, which is the microphone gain (the transmitted audio) to ensure that the ALC is set appropriately for SSB.

Last edited by jeff00seattle. Register to edit

Tags: none

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