projects:freqbuddy

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
projects:freqbuddy [2024/01/21 17:36] – [Data entry] shorten description simpelprojects:freqbuddy [2026/07/26 22:17] (current) – external edit 127.0.0.1
Line 1: Line 1:
-= FreqBuddy+# FreqBuddy
  
 ---- dataentry project ---- ---- dataentry project ----
Line 14: Line 14:
 ---- ----
  
-===== How it works =====+##### How it works
  
 This tool calculates the best interference-free radio frequencies (UHF) within a TV channel (8 MHz grid). Only one TV channel is analyzed in isolation. Additional frequencies from other TV channels are **not** checked for compatibility. This tool calculates the best interference-free radio frequencies (UHF) within a TV channel (8 MHz grid). Only one TV channel is analyzed in isolation. Additional frequencies from other TV channels are **not** checked for compatibility.
  
 {{:projects:freqbuddy_screenshot.png?400|}} {{:projects:freqbuddy_screenshot.png?400|}}
-==== Important note ====+#### Important note
  
 //FreqBuddy// is designed for use in Germany. Even if the TV channels are not only used in Germany, the exclusions (radio astronomy and LTE) are adapted to German conditions. Other comments are also applied exclusively to German rules. //FreqBuddy// is designed for use in Germany. Even if the TV channels are not only used in Germany, the exclusions (radio astronomy and LTE) are adapted to German conditions. Other comments are also applied exclusively to German rules.
Line 25: Line 25:
 **Attention: FreqBuddy is a mathematical tool for calculating optimal frequencies. You must check for yourself whether the use of these frequencies is permitted for your application.** **Attention: FreqBuddy is a mathematical tool for calculating optimal frequencies. You must check for yourself whether the use of these frequencies is permitted for your application.**
  
-==== Tip ====+#### Tip
  
 First use [[https://fmscan.org/locsearch.php?reset=1&r=t&m=s|fmscan.org]] to find out which TV channels (column "Ch") are not or only weakly occupied by DVB-T. Completely free channels do not appear in the list and are probably a good choice. Ideally, do not use two directly adjacent TV channels. First use [[https://fmscan.org/locsearch.php?reset=1&r=t&m=s|fmscan.org]] to find out which TV channels (column "Ch") are not or only weakly occupied by DVB-T. Completely free channels do not appear in the list and are probably a good choice. Ideally, do not use two directly adjacent TV channels.
  
-==== Other functions ====+#### Other functions
  
   * Click on a single frequency to show it in full screen.   * Click on a single frequency to show it in full screen.
Line 35: Line 35:
   * //Cookie//: The last TV channel selected (and the frequency intervals selected in ascending or descending order) are saved in a cookie for 7 days.   * //Cookie//: The last TV channel selected (and the frequency intervals selected in ascending or descending order) are saved in a cookie for 7 days.
  
-===== Backgrounds / details =====+##### Backgrounds / details
  
-==== Frequency intervals ====+#### Frequency intervals
  
 These can be mirrored within a TV channel. By default, the spacing increases with each higher frequency (increasing - ↑). This can be reversed (descending - ↓). This is recommended, for example, for a second set of frequencies to be used simultaneously. The second set should be as far away as possible from the first and use the descending frequency spacing instead of the ascending one. These can be mirrored within a TV channel. By default, the spacing increases with each higher frequency (increasing - ↑). This can be reversed (descending - ↓). This is recommended, for example, for a second set of frequencies to be used simultaneously. The second set should be as far away as possible from the first and use the descending frequency spacing instead of the ascending one.
  
-==== Antenna spacing ====+#### Antenna spacing
  
 If the transmitter and receiver are to be operated close to each other: If the transmitter and receiver are to be operated close to each other:
Line 48: Line 48:
   * Transmitter and receiver should be at least 8 MHz (one TV channel) apart to minimize transmitter-receiver blocking.   * Transmitter and receiver should be at least 8 MHz (one TV channel) apart to minimize transmitter-receiver blocking.
  
-==== Background frequencies ====+#### Background frequencies
  
   * A maximum of 8 frequencies are available in one TV channel.   * A maximum of 8 frequencies are available in one TV channel.
Line 55: Line 55:
   * Handheld devices in the frequency range **823 - 826 MHz** may only be operated with a maximum transmission power of 82 mW.   * Handheld devices in the frequency range **823 - 826 MHz** may only be operated with a maximum transmission power of 82 mW.
  
-==== Calculation of the freedom from intermodulation ====+#### Calculation of the freedom from intermodulation
  
   * min. 400 kHz carrier spacing   * min. 400 kHz carrier spacing
  • projects/freqbuddy.1705858577.txt.gz
  • Last modified: 2024/01/21 17:36
  • by simpel