enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Near vertical incidence skywave - Wikipedia

    en.wikipedia.org/wiki/Near_Vertical_Incidence...

    The most reliable frequencies for NVIS communications are between 1.8 MHz and 8 MHz. Above 8 MHz, the probability of success begins to decrease, dropping to near zero at 30 MHz. Usable frequencies are dictated by local ionospheric conditions, which have a strong systematic dependence on geographical location.

  3. Dropout (communications) - Wikipedia

    en.wikipedia.org/wiki/Dropout_(communications)

    A dropout is a momentary loss of signal in a communications system, usually caused by noise, propagation anomalies, or system malfunctions. For analog signals, a dropout is frequently gradual and partial, depending on the cause.

  4. Skywave - Wikipedia

    en.wikipedia.org/wiki/Skywave

    Even more serious fading can occur when signals arrive via two or more paths, for example when both single-hop and double-hop waves interfere with other, or when a skywave signal and a ground-wave signal arrive at about the same strength. This is the most common source of fading with nighttime AM broadcast signals.

  5. Skip zone - Wikipedia

    en.wikipedia.org/wiki/Skip_zone

    A skip zone is an annular region between the farthest points at which the ground wave can be received and the nearest point at which the refracted sky waves can be received. Within this region, no signal can be received because, due to the conditions of the local ionosphere, the relevant sky waves are not reflected but penetrate the ionosphere.

  6. Rain fade - Wikipedia

    en.wikipedia.org/wiki/Rain_fade

    Rain fade can be caused by precipitation at the uplink or downlink location. It does not need to be raining at a location for it to be affected by rain fade, as the signal may pass through precipitation many miles away, especially if the satellite dish has a low look angle. From 5% to 20% of rain fade or satellite signal attenuation may also be ...

  7. Fix sending and receiving issues with third-party email apps

    help.aol.com/articles/cant-send-or-receive-email...

    Keep in mind - For two-step verification, generate an app password. If you use a verizon.net email, enter verizon.net server info . Use your full email address as your username.

  8. Sporadic E propagation - Wikipedia

    en.wikipedia.org/wiki/Sporadic_E_propagation

    When short-skip E s reception occurs, i.e., under 500 miles (800 km) in band I, there is a greater possibility that the ionized sporadic E cloud will be capable of reflecting a signal at a much higher frequency – i.e., a VHF band 3 channel – since a sharp reflection angle (short skip) favours low frequencies, a shallower reflection angle ...

  9. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!