{"id":42528,"date":"2015-02-25T00:00:29","date_gmt":"2015-02-24T22:00:29","guid":{"rendered":"http:\/\/www.cqdx.ru\/ham\/?p=42528"},"modified":"2023-10-06T17:42:01","modified_gmt":"2023-10-06T15:42:01","slug":"cr-1a-communications-sdr-receiver","status":"publish","type":"post","link":"https:\/\/www.cqdx.ru\/ham\/new-equipment\/cr-1a-communications-sdr-receiver\/","title":{"rendered":"CR-1a Communications SDR Receiver"},"content":{"rendered":"

\"SQUARED_UP_OBLIQUE_VIEW_OF_CR_1A_FULL_SIZE__76883.1405428614.1280.1280\"<\/a><\/p>\n

Frequency Coverage and Modes:<\/strong><\/p>\n

MW-HF: General Coverage: 500 kHz – 30.000 MHz<\/p>\n

User Configurable Band Key:<\/strong><\/p>\n

Amateur Band Selections: 160 m \u2013 10 m
\nInternational Broadcast Bands: 120 m \u2013 11 m
\nAM-SSB-CW manual or auto-mode selection (based on tuned frequency)
\nInternational Broadcasting: manual or auto-selection: 5 kHz steps
\nAutomatic -Filter Width select with override (manual selection)
\nTuning Resolution (cursor control): 1 MHz \/ 100 -10 – 1 kHz \/ 100 – 10 Hz
\nMDS (minimum discernible signal): nominal -130 dBm in 500 Hz Bandwidth
\nLW: 150 – 500 kHz is included for experimental purposes. See Hardware Limitations below.<\/p>\n

VHF-UHF General Frequency Coverage and Performance:<\/strong><\/p>\n

VHF: Continuous Coverage: 64.0 – 260.0 MHz
\nUHF: Continuous Coverage: 437.0 – 512.0 MHz
\nFM Broadcast: nominal -88 dBm in 200 kHz bandwidth
\nVHF Sensitivity 108.0 – 150.0 MHz: nominal – 98 dBm (or better) for 12 dB SINAD, 15 kHz filter bandwidth (5 kHz deviation)
\nUHF Sensitivity: nominal -86 to-98 dBm for 12 dB SINAD, 15 kHz filter bandwidth (5 kHz deviation)
\nStandard frequency steps for each band<\/p>\n

VHF-UHF Band Plan:<\/strong><\/p>\n

FM Broadcast: 87.7 – 107.9 – Monaural – 5 kHz audio bandwidth (76.0 MHz International)
\nAircraft Bands: 108.000 – 136.975 MHz, AM auto-select -25 kHz channel steps
\nAmateur: 2 m, 1.25 m, 70 cm (upper portion starting @ 437.0 MHz).
\nNBFM mode default with SSB-CW mode selects.
\nMarine & NOAA Weather Radio
\nPublic Service: 137.0 – 225.0: 12.5 and 25 kHz steps.
\nFRS-GMRS 462 \u2013 467 MHz , 25 kHz Steps
\nGeneral Coverage 467-512 MHz
\nNote: 6 m (54 MHz) is not available.<\/p>\n

Receiver Architecture:<\/strong><\/p>\n

HF: Dual conversion (VHF-UHF: single conversion) with low -IF, I-Q digital sampling, 32-bit DSP with digital audio CODEC
\nDSP demodulation algorithms: DSB-AM, SSB, CW, WBFM, NBFM
\nUser Selectable, DSP fixed bandwidth channel filtering selections<\/p>\n

Audio System – Digital CODEC<\/strong><\/p>\n

Speaker Driver: 0.8 W into 8 Ohm load
\nInternal 2.5\u201d diameter, mylar-cone communications grade speaker
\nExternal monaural speaker jack (3.5 mm stereo jack – back panel)
\nHeadset Driver: 40 mW into 16 Ohms. (3.5 mm stereo jack – front panel).<\/p>\n

Commradio CR-1a REVIEW<\/div><\/div>
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