MSI/55 - yekare terminal yekuodha zvinhu nebazi muchitoro chepakati

Mudziyo wakaratidzwa paKDPV waive nechinangwa chekungotumira maodha kubva kubazi kuenda kuchitoro chepakati. Kuti uite izvi, zvaive zvakafanira kutanga kuisa nhamba dzechinyorwa chezvinhu zvakarairwa mairi, kufonera nhamba yepakati chitoro uye kutumira iyo data uchishandisa musimboti weacoustically yakasanganiswa modem. Iyo yekumhanyisa iyo iyo terminal inotumira data inofanirwa kuve 300 baud. Inofambiswa nemasero mana e-mercury-zinc (panguva iyoyo zvaigoneka), iyo voltage yechinhu chakadaro ndeye 1,35 V, uye bhatiri rose 5,4 V, saka zvese zvakashanda kubva kune 5 V magetsi. Iyo switch inobvumidza iwe kusarudza matatu modhi: CALC - yenguva dzose Calculator, OPER - unogona kuisa manhamba uye mamwe mavara, uye TUMA - kutumira, asi pakutanga handina kukwanisa kuita ruzha. Zviri pachena kuti iwe unogona neimwe nzira kuchengetedza zvinyorwa uye wozozvitumira, asi sei? Kana tikakwanisa kuziva, munyori anoedza kuongorora manzwi chirongwa ichi, kana kunyange neimwe nzira gadzirisa iyo terminal yemhando dzedhijitari dzeamateur kutaurirana.

Chishandiso kubva kudivi rekuseri, iyo ine simba musoro uye bhatiri compartment inoonekwa:

Chinhu chakanyanya kukosha - sei kusvina ruzha kunze kweiyo terminal - munyori akadzidza kubva kumunhu aimbove ane imwechete terminal. Iwe unofanirwa kuisa iyo yekutanga kodhi, uye ipapo iwe unogona kuisa zvinyorwa. Isu tinofambisa shanduko kune chinzvimbo cheOPER, tsamba P ichaonekwa. Isa 0406091001 (munyori haatsananguri kuti chii ichi, zvichida zita remushandisi) uye tinya ENT. Tsamba H inooneka. Isa 001290 (uye iyi ingangove password) wodzvanya ENT zvakare. Nhamba 0 inooneka. Unogona kuisa zvinyorwa.

Chinyorwa chinofanira kutanga nebhii H kana P (munyori akakanganisa pano, hapana vara P pakhibhodi, pane F), ipapo pane manhamba. Mushure mekudzvanya kiyi yeENT, mutsara wakaita se0004 0451 unooneka, apo nechinyorwa chimwe nechimwe chinotevera nhamba yekutanga inowedzera uye yechipiri inoderera, izvo zvinoreva kuti iyi ndiyo nhamba yeakagarwa uye akasununguka maseru, zvichiteerana. Unogona kushandisa mabhatani emiseve kupuruzira mukati mezvinyorwa zvakapinzwa, asi munyori haazive maitiro ekuzvidzima (zvinoreva kuti kiyi yeCLR haina kubatsira). Hazvitaurwi kuti ungaratidza sei uwandu hwechinyorwa chimwe nechimwe.

Kana wapinda zvinyorwa, wobva wafambisa switch kuenda kune SEND chinzvimbo wodzvanya SND/= kiyi. Iyo meseji SEND BUSY icharatidzwa pane chiratidzo, uye kutapurirana kunotanga:

Toni ine frequency ye4,4 Hz inonzwika kwe1200s. Zvadaro kune imwe 6s - 1000 Hz. Inotevera 2,8 s inopedzwa kuendesa iyo modulated chiratidzo, ichiteverwa neimwe 3 s - zvakare kuendesa iyo 1000 Hz toni.

Kana iwe ukanyatsotarisa pane spectrum, chaizvoizvo, panzvimbo ye1000 Hz unowana 980, uye panzvimbo ye1200 - 1180. Munyori akanyora WAV file, akaisa purogiramu yataurwa pamusoro apa ("murume" nokuda kwayo. pano) ndokumhanya seizvi:

minimodem -r -f msi55_bell103_3.wav -M 980 -S 1180 300

Zvakaitika:

### CARRIER 300 @ 1000.0 Hz ###
�H00��90+�H00��90+�H00��90+�H��3�56��+�Ʊ�3�56��+��9��+�ƴ56+�H963�5���+�
### NOCARRIER ndata=74 confidence=2.026 ampl=0.147 bps=294.55 (1.8% slow) ###

Inotaridza senge Bell 103 modulation. Kunyangwe paine kazhinji 1070 uye 1270 Hz.

Ko ma frequency epaterminal "akayangarara kure"? Munyori akagadzirisa WAV faira kuitira kuti kumhanya kwakawedzera ne 1,8%. Zvakaitika zvinenge 1000 uye 1200. Kutangwa kutsva kwechirongwa:

minimodem -r -f msi55_bell103_4.wav -M 1000 -S 1200 300 -R 8000 -8 -startbits 1 -stopbits 1

Uye akapindura:

### CARRIER 300 @ 1000.0 Hz ###
�H00��90+�H00��90+�H00��90+�H��3�56��+�Ʊ�3�56��+��9��+�ƴ56+�H963�5���+�
### NOCARRIER ndata=74 confidence=2.090 ampl=0.148 bps=299.50 (0.2% slow) ###

Muzviitiko zvese izvi, mhedzisiro inotakura zvinoreva, kunyangwe paine zvikanganiso. Chinyorwa nhamba H12345678 "yakaburitswa" kubva pachiratidzo seH��3�56� - nhamba dzatakakwanisa kuburitsa dziri munzvimbo dzadzo. Iyo magetsi inogona kunge isina kusefa isina kunaka, zvichiita kuti 50-Hz yekumashure ive pamusoro pechiratidzo. Chirongwa chinoshuma kukosha kwakaderera (kuvimba = 2.090), izvo zvinoratidza chiratidzo chakakanganiswa. Asi ikozvino zvave pachena kuti iyo terminal yakatumira sei data kune yepakati chitoro komputa ichiripo.

Source: www.habr.com