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  2. Digital subchannel - Wikipedia

    en.wikipedia.org/wiki/Digital_subchannel

    The FCC, in October 2020, concluded from WWFD's experiments: "the record does not establish that an audio stream on an HD-2 subchannel is currently technically feasible(.)" [18] A proposed FCC rule would require stations that wish to multiplex their digital AM signals to request and receive permission to do so. [18]

  3. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    481 Call/Transaction Does Not Exist Server received a request that does not match any dialog or transaction. [1]: §21.4.19 482 Loop Detected Server has detected a loop. [1]: §21.4.20 483 Too Many Hops Max-Forwards header has reached the value '0'. [1]: §21.4.21 484 Address Incomplete Request-URI incomplete. [1]: §21.4.22 485 Ambiguous

  4. Orthogonal frequency-division multiplexing - Wikipedia

    en.wikipedia.org/wiki/Orthogonal_frequency...

    The resilience to severe channel conditions can be further enhanced if information about the channel is sent over a return-channel. Based on this feedback information, adaptive modulation , channel coding and power allocation may be applied across all subcarriers, or individually to each subcarrier.

  5. List of WLAN channels - Wikipedia

    en.wikipedia.org/wiki/List_of_WLAN_channels

    Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.

  6. Comparison of user features of messaging platforms - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_user...

    Discord communities are organized into discrete collections of channels called servers. A user can create servers for free, manage their public visibility and create one or more channels within that server. [411] Starting October 2017, Discord allows game developers and publishers to verify their servers.

  7. Help:Creating a bot - Wikipedia

    en.wikipedia.org/wiki/Help:Creating_a_bot

    Once the bot has been approved and given its bot flag permission, one can add "bot=True" to the API call - see mw:API:Edit#Parameters in order to hide the bot's edits in Special:RecentChanges. In Python, using either mwclient or wikitools, then adding bot=True to the edit/save command will set the edit as a bot edit - e.g. PageObject.edit(text ...

  8. Channel capacity - Wikipedia

    en.wikipedia.org/wiki/Channel_capacity

    The channel capacity is defined as ... For memoryless channels, Shannon showed [13] that feedback does not increase the capacity, ...

  9. DisplayPort - Wikipedia

    en.wikipedia.org/wiki/DisplayPort

    The DisplayPort AUX channel is a half-duplex (bidirectional) data channel used for miscellaneous additional data beyond video and audio, such as EDID (I 2 C) or CEC commands. [8]: §2.4 This bidirectional data channel is required, since the video lane signals are unidirectional from source to display. AUX signals are transmitted across a ...