{"id":956,"date":"2020-12-15T12:47:16","date_gmt":"2020-12-15T07:47:16","guid":{"rendered":"https:\/\/nelt.info\/?p=956"},"modified":"2020-12-15T12:47:16","modified_gmt":"2020-12-15T07:47:16","slug":"hf-pager","status":"publish","type":"post","link":"https:\/\/nelt.info\/?p=956&lang=en","title":{"rendered":"HF Pager"},"content":{"rendered":"\n

A pager is a one-way communication device. It receives text and voice messages on HF when the transmitter and receiver are far apart and no other means of communication is available; when installing an expensive radio is unnecessary or impossible; or when messages are alerts, remote control commands or broadcast news.<\/p>\n\n\n\n

Each pager has an individual number and receives text messages addressed to it alone, as well as group messages addressed to all. It can also be used as an ordinary HF receiver.<\/p>\n\n\n\n

Main specifications<\/strong><\/p>\n\n\n\n

Type<\/td>Direct conversion DSB (SSB option)<\/td><\/tr>
Frequency range<\/td>2 \u2013 20 MHz (16 \u00b8 256 subband)<\/td><\/tr>
Sensitivity<\/td>0.5 mV (-95dBm)<\/td><\/tr>
Selectivity<\/td>60 dB (0.3 \u00b8 2.7 kHz)<\/td><\/tr>
Intermodulation<\/td>75 dB<\/td><\/tr>
Channel capacity<\/td>100 (10 scanning)<\/td><\/tr>
Power<\/td>+5 \u00b8 16 V (55 mA)<\/td><\/tr>
Size<\/td>140\u00d7100\u00d730 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Interference immunity<\/strong><\/p>\n\n\n\n

Receives digital messages on very noisy channels where voice communication is impossible.<\/p>\n\n\n\n

Undemanding power requirements<\/strong><\/p>\n\n\n\n

Runs from any DC source of at least 3 V \u2014 primary cells, rechargeable batteries or a solar panel.<\/p>\n\n\n\n

Minimal antenna requirements<\/strong><\/p>\n\n\n\n

If necessary, a simple length of wire will serve as the antenna.<\/p>\n\n\n\n

Easy frequency programming<\/strong><\/p>\n\n\n\n

Programmed directly from a computer’s COM port, with no separate programmer needed.<\/p>\n\n\n\n

Calling protocol compatibility<\/strong><\/p>\n\n\n\n

Supports the Selcall format of CODAN and other radios using BPSK modulation.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"

A pager is a one-way communication device. It receives text and voice messages on HF when the transmitter and receiver are far\u2026<\/p>\n","protected":false},"author":1,"featured_media":785,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74],"tags":[],"class_list":["post-956","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-developments-en"],"_links":{"self":[{"href":"https:\/\/nelt.info\/index.php?rest_route=\/wp\/v2\/posts\/956","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nelt.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nelt.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nelt.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nelt.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=956"}],"version-history":[{"count":0,"href":"https:\/\/nelt.info\/index.php?rest_route=\/wp\/v2\/posts\/956\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nelt.info\/index.php?rest_route=\/wp\/v2\/media\/785"}],"wp:attachment":[{"href":"https:\/\/nelt.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nelt.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nelt.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}