17 Octombrie 2017
   
Sâmbătă, 17 Ianuarie 2015 21:05

Hytera PD785/PD785G DMR

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  Preferata mea.De departe nici o statie portabila nu se apropie de cat de mult imi place. In primul rand designul.Amplasarea antenei pe centru si dispunerea butoanelor alaturi de lcd-ul incadrat frumos ca si tastatura o scoate din anonimat.

  Cel putin pentru mine. Vine in ambele variante VHF: 136 - 174 MHz siUHF: 400 - 470 MHz.Cu si fara GPS.De cand am vazut-o e un must have. NU gasesc nici un minus la ea. Carcasa bine gandita si rezistenta MIL810 - C/D/E/F/G si clasa de protectie IP67 o fac perfecta pentru mine. Alaturi de Yaesu VX-6-le meu va face echipa perfecta.La lucru si la bautele accidentale.Ale lor nu ale mele.

   Din punctul meu de vedere e portabila DMR a anului 2014. Unul din proiectele mele implica o asemenea statie si reteaua DMR-Marc. Adevarul e ca este atat de versatila incat poate fi folosita intr-un domeniu mare de activitati. si medii. Atat in radioamatorism cat si civil,militar,guvernamentalsi industrial.Exista si versiunea PD795 Ex pentru medii explozive. Pentru mine e portabila WOW pana acum.

  O prezentare amanuntita a facut si Adrian, YO3HJV pe pagina lui personala

  Cateva din specificatiile date de producator sunt:

 



 

 

 

 

 

 

 

 

 

 

 

 

General data
Frequency range
   
VHF: 136 - 174 MHz
UHF: 400 - 470 MHz
Supported operation modes
   

    DMR Tier II (DMR conventional), Simulcast
    DMR Tier III (DMR trunking)
    Analog, MPT 1327

DMR Tier II in reference to ETSI TS 102 361-1/2/3
DMR Tier III in reference to ETSI TS 102 361-1/2/3/4
Channel capacity
1024
Number of zones
64 (with up to 16 channels each)
Channel spacing (analog)
12.5 / 20 / 25 kHz
Channel spacing (digital)
12.5 kHz
Operating voltage
7.4 V (nominal)
Standard battery
2000 mAh (lithium-ion battery)
Battery service life (analog)
(5-5-90 duty cycle, high transmitting power, standard battery)
VHF: approx. 11 hours / 10 hours (GPS mode)
UHF: approx. 13.5 hours / 12 hours (GPS mode)
Battery service life (digital)
(5-5-90 duty cycle, high transmitting power, standard battery)
VHF: approx. 13.5 hours / 12 hours (GPS mode)
UHF: approx. 15.5 hours / 14 hours (GPS mode)
Frequency stability
±1.5 ppm
Antenna impedance
50 Ω
Dimensions (H×W×D)
(with standard battery, without antenna)
125 x 55 x 37 mm
Weight (with antenna and standard battery)
355 g
LCD display
160 × 128 pixels, 65,536 colours, 4.57 cm, 4 lines
Transmitter
Transmitting power
VHF: 1 / 5 W
UHF: 1 / 4 W
Modulation
11 K0F3E at 12.5 kHz
14 K0F3E at 20 kHz
16 K0F3E at 25 kHz
4FSK digital modulation
12.5 kHz (data only): 7K60FXD
12.5 kHz (data and voice): 7K60FXW
Interfering signals and harmonics
-36 dBm < 1 GHz
-30 dBm > 1 GHz
Modulation limiting
±2.5 kHz at 12.5 kHz
±4.0 kHz at 20 kHz
±5.0 kHz at 25 kHz
Noise suppression
40 dB at 12.5 kHz
43 dB at 20 kHz
45 dB at 25 kHz
Adjacent channel selectivity
60 dB at 12.5 kHz
70 dB at 20/25 kHz
Audio sensitivity
+1 dB to -3 dB
Nominal audio distortion
≤ 3%
Digital vocoder type   
AMBE+2™
Receiver
Sensitivity (analog)
0.3 μV (12 dB SINAD)
0.22 μV (typical) (12 dB SINAD)
0.4 μV (20 dB SINAD)
Sensitivity (digital)   
0.3 μV / BER 5%
Adjacent channel selectivity
TIA-603
ETSI
0 dB at 12,5 kHz / 70 dB at 20 and 25 kHz
60 dB at 12.5 kHz / 70 dB at 20 and 25 kHz
Intermodulation
TIA-603
ETSI
70 dB at 12.5/20/25 kHz
65 dB at 12.5/20/25 kHz
Spurious response rejection
TIA-603
ETSI
70 dB at 12,5/20/25 kHz
70 dB at 12.5/20/25 kHz
Hum and Noise
40 dB at 12.5 kHz
43 dB at 20 kHz
45 dB at 25 kHz
Nominal audio power output
0.5 W
Nominal audio distorsion
≤ 3 %
Audio sensitivity
+1 dB to -3 dB
Conducted spurious emission
< -57 dBm
Ambient data
Operating temperature range
-30 °C to +60 °C
Storage temperature range
-40°C to +85°C
ESD
IEC 61000-4-2 (level 4)
±8 kV (contact discharge) ±15 kV (air discharge)
Protection against dust and moisture
IP67
Shock and vibration resistance
MIL-STD-810 C/D/E/F/G
Relative humidity   
MIL-STD-810 C/D/E/F/G
GPS (PD785G only)
Time to first fix (TTFF) cold start
< 1 minute
Time to first fix (TTFF) hot start
< 10 seconds
Horizontal accuracy
< 10 meters

Read 6120 times Last modified on Luni, 23 Martie 2015 23:36

2 comments

  • Comment Link yo8 Miercuri, 29 Aprilie 2015 23:43 posted by yo8

    Super misto jucaria. Vine din urma celor cu experienta maredestul de repede si am auzit la multi ca e si calitativa. Pacat ca la noi nu se prea aude nimic despre ea. Felicitari ca incerci sa o promovezi !

  • Comment Link Cristian Joi, 30 Aprilie 2015 11:18 posted by Cristian

    Pare interesanta portabila. Exista si versiune UHF-VHF adica dual? nu separate?

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