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howto:hambasics:sections:stationassembly [2020/10/07 08:09] – ↷ Links adapted because of a move operation va7fihowto:hambasics:sections:stationassembly [2020/12/30 09:08] (current) – [Questions] va7fi
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-|<100% ----- >| 
-|  [[..:home|Ham Basics]]  |  [[..:test|About The Test]]  |  [[..:reference|References]]  ^  [[..:sections|Study Sections]]  | 
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 ====== Block Diagrams ====== ====== Block Diagrams ======
 The next few sections use block diagrams to illustrate the configuration of various pieces of equipment.  Here's an excellent introduction that should help with what follows: The next few sections use block diagrams to illustrate the configuration of various pieces of equipment.  Here's an excellent introduction that should help with what follows:
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 ====== HF Station ====== ====== HF Station ======
-{{ :howto:hambasics:3_1.png }}+{{ howto:hambasics:sections:3_1.png }}
  
 Some of the components shown above may be integrated into one device, and others may be optional.  But if all are included, this is how they should be connected. Some of the components shown above may be integrated into one device, and others may be optional.  But if all are included, this is how they should be connected.
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 ===== CW Transmitter ===== ===== CW Transmitter =====
-{{ :howto:hambasics:3_4.png }}+{{ howto:hambasics:sections:3_4.png }}
  
   * The **master oscillator** generates a stable sine wave signal at the rest frequency.   * The **master oscillator** generates a stable sine wave signal at the rest frequency.
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 ===== FM Transmitter ===== ===== FM Transmitter =====
-{{ :howto:hambasics:3_2.png }}+{{ howto:hambasics:sections:3_2.png }}
  
   * The **microphone** picks up the sound waves carried by the air and converts them into a weak electrical signal that becomes the //baseband//.   * The **microphone** picks up the sound waves carried by the air and converts them into a weak electrical signal that becomes the //baseband//.
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 ===== SSB Transmitter ===== ===== SSB Transmitter =====
-{{ :howto:hambasics:3_6.png }}+{{ howto:hambasics:sections:3_6.png }}
  
   * The **microphone** picks up the sound waves carried by the air and converts them into a weak electrical signal that becomes the //baseband//.   * The **microphone** picks up the sound waves carried by the air and converts them into a weak electrical signal that becomes the //baseband//.
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 Before we look at individual components, there's an important step we should highlight: The received radio frequency (RF) is converted down to a predetermined intermediate frequency (IF) before being processed further.  This solves a lot of problems that plague simpler receivers.  Now let's look at the details. Before we look at individual components, there's an important step we should highlight: The received radio frequency (RF) is converted down to a predetermined intermediate frequency (IF) before being processed further.  This solves a lot of problems that plague simpler receivers.  Now let's look at the details.
  
-{{ :howto:hambasics:3_3.png }}+{{ howto:hambasics:sections:3_3.png }}
  
   * The **RF amplifier** increases the strength of the weak radio signal received by the antenna.   * The **RF amplifier** increases the strength of the weak radio signal received by the antenna.
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 ===== SSB/CW Receiver ===== ===== SSB/CW Receiver =====
-{{ :howto:hambasics:3_5.png }}+{{ howto:hambasics:sections:3_5.png }}
   * The first part is the same as the FM Receiver above.   * The first part is the same as the FM Receiver above.
   * The **Beat Frequency Oscillator**: restores the carrier that was suppressed to create the SSB signal.   * The **Beat Frequency Oscillator**: restores the carrier that was suppressed to create the SSB signal.
-  * The **Product Detector** mixes the IF and the BF together to extract the audio frequency (AF = |IF - BF|).+  * The **Product Detector** mixes the IF and the BF together to extract the audio frequency (AF = |IF - BF|). \\ For example, a receiver with a local oscillator at 3.995 MHz should have its IF tuned to 455 kHz to receive an incoming signal of 3.54 MHz. 
   * The **audio amplifier** increases the strength of the baseband signal before passing it to the speaker.   * The **audio amplifier** increases the strength of the baseband signal before passing it to the speaker.
  
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 ====== Digital System ====== ====== Digital System ======
-{{ :howto:hambasics:3_7.png }}+{{ howto:hambasics:sections:3_7.png }}
  
   * The important conceptual leap here that we want the computer to be able to transmit something.  That something could be a [[/howto/winlink |Winlink]] message, [[howto/aprs |APRS]] telemetry, a live [[howto/js8 |JS8]] chat, or any other kind of data.     * The important conceptual leap here that we want the computer to be able to transmit something.  That something could be a [[/howto/winlink |Winlink]] message, [[howto/aprs |APRS]] telemetry, a live [[howto/js8 |JS8]] chat, or any other kind of data.  
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 ====== Regulated Power Supply ====== ====== Regulated Power Supply ======
-{{ :howto:hambasics:3_8.png }}+{{ howto:hambasics:sections:3_8.png }}
  
 The goal of a regulated power supply is to convert household voltage (120 VAC) into DC voltage for the radio (13.8 VDC). The goal of a regulated power supply is to convert household voltage (120 VAC) into DC voltage for the radio (13.8 VDC).
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-======= Questions =======+====== Questions ======
   * B-003-001-001 -> B-003-008-006   * B-003-001-001 -> B-003-008-006
 +  * B-003-010-004 -> B-003-010-006
  
 [[propagation |{{/back.png }}]] [[practice |{{  /next.png}}]] [[propagation |{{/back.png }}]] [[practice |{{  /next.png}}]]
  
howto/hambasics/sections/stationassembly.1602083356.txt.gz · Last modified: 2020/10/07 08:09 by va7fi