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Kydera CDM-550H DMR UHF 400-430 440-480Mhz 40W Digital Car Radio Ham Transceiver Product Description Specification:  Model CDM-550H  Items  UHF  VHF  Frequency Range  400-480MHZ; 350-390MHZ  136-174MHZ; 245MHZ  Channel Zone  16  Total Channel Capacity (512)  256 (Analog)  256 (Digital)  Digital Mode  TDMA T2(DMR)  Temperature  -20℃- 60℃  Measurement(H*W*D)  140*175*46mm  Voltage Rating  DC: 13.8V   Receiver:   Frequency  400-480MHZ; 350-390MHZ  136-174MHZ; 245MHZ  Channel Spacing  12.5kHz /25kHZ/6.25kHz  Frequency Stability (-20℃, 60℃, 25℃)   / – 1.5ppm  Analog Sensitivity (12 dB SINAD)  0.3uV / 0.25uV  Digital Sensitivity (5% BER)  0.3uV  Intermediation  65dB  Adjacent Channel Selectivity  60dB 12.5kHz / 65dB 25kHz  Spurious Rejection  65dB  Rated Audio  2w  Audio Distortion Rated Audio  3%  FM Hum & Noise  -40dB 12.5kHz / -45dB 25kHz  Audio Response   1,-3dB  Conducted /Radiated Emission  -57dBm   Transmitter:   Frequency  400-480MHZ; 350-390MHZ  136-174MHZ; 245MHZ  Channel Spacing  12.5kHz /25kHZ/6.25kHz  Frequency Stability (-20℃, 60℃, 25℃)   / – 1.5ppm  Low Power  L: 25W  25W  High Power  H: 40W  50W  Modulation Restriction  ±2.5kHz 12.5kHz / ±5kHz 25kHz  FM Hum & Noise  -40dB 12.5kHz / -45dB 25kHz  Conducted /Radiated Emission  -36dBm<1GHz / -30dBm>1GHz  Adjacent Channel Selectivity  -60dB 12.5kHz / -65dB 25kHz  Audio Response   1,-3dB  Audio Distortion  3%  FM Modulation  12.5kHz: 11K0F3E  25kHz: 16K0F3E  4FSK Digital Modulation  12.5kHz Data: 7K60F1D & 7K60FXD  12.5kHz Audio: 7K60F1E & 7K60FXE  12.5kHz Data & Audio: 7K60F1W  Digital Vocoder  AMBE 2™  Digital Agreement  ETSI-TS102 361-1, -2, -3   GPS(Optional)  Precisely and standard designed for a long-term positioning( 95% value > could find 5 satellites  rated -130dBm signal strength  TTFF (time to first fix) cold start  < 1 min  TTFF (time to first fix) warm start  < 10 s  Horizontal Position Accuracy  < 10 ms Packaging & Shipping –By carton. 1*DMR Mobile car radio transceiver 1*DC Power Cable 1*Bracket 2*Bracket Screw 1*Programming cable(optional) –Bulk order, ship by sea or send radios to your forwarder(free send to Xiamen,Jinjiang etc.); sample, usually ship by DHL,UPS,Fedex.