Retevis RT90 Mobile Dual Band DMR Mobile Radio Review – Part 1


  • RT90 supports analog and digital mode, It provides dual band, dual standby, dual display, dual time slot, operating on both 400-480MHz UHF frequencies and 136-174MHz VHF at up to 50 watts VHF and 45 watts UHF.
  • Using Time-Division Multiple-Access (TDMA) digital technology,AMBE++vocoder, compatible with Mototrbo and DMR Tier I &II.
  • The RT90 supports 250 zones, 3000 channel, 10000 contacts, it has built-in CTCSS/DCS, channel scan, priority scan, short text message features, draft message edit, contacts check and edit, and encryption.
  • RT90 has other function, including Private Call, Group Call and All Call, it also includes Lone worker mode, power save mode, low power alarm, an emergency alarm and VOX capability.


  • Output power: 50W
  • Use TDMA digital function
  • Compatible with Mototrbo Tier I &II
  • Dual band, dual standby, dual display, dual time slot
  • 250 zone, 3000 channel, 10000 contacts
  • Digital mode and Analog mode
  • Single call, group call and all call
  • Emergency function
  • Remote kill/stun/Activate
  • Group match/single match
  • Record function
  • PC programmable function
  • CTCSS.DCS encoding and decoding function
  • PC password protection function
  • Color LCD Display
  • Programmable functional keys
  • Low Voltage prompt
  • Upgradeable by firmware
  • TOT
  • SQL Setting
  • Scanning Function and priority scanning
  • Monitor Function
  • VOX Transmitting
  • Lone Worker
  • Time and zone setting


Frequency Range(MHz) VHF: 136-174Mhz UHF:400-480Mhz
Channel 3000
PLL Channel Spacing 6.25/12.5/25KHz
Voltage Rating DC 13.8V
Operating Temperature -30℃~+60℃
Storage Temperature -30℃ ~+85℃
Dimention 143*50*175 mm
Compatible With American Military Standard (MIL-STD-810C/D/E)


RF Power Output L:25W H:50W (VHF)
L:25W H:45W (UHF)
FM Hum and Noise -40dB @12.5KHz 
-45dB @25KHz
Modulation limited

+/- 2.5KHz @ 12.5 KHz 
+/-5.0KHz @ 25KHz

Conducted/radiated emission

-36 dBm < 1GHz 
-30 dBm > 1GHz < 4GHz

Adjacent channel power

-60dB @12.5KHz 
-65dB @25KHz

Audio Response

+1dB ~ -3dB

Audio distortion


FM Modulation


4FSK digital modulation

12.5KHz only date:7K60FXD 
12.5KHz date and audio:7K60FXE

Digital protocol

ETSI TS 102361-1,-2,-3

Digital vocoder type


Digital agreement



Frequency stability (-20℃+60℃,+25℃)


Digital Sensibility

0.3uV/-117.4dBm (BER 5%)
0.7uV/-110 dBm (BER 1%)

Analogue Sensibility

0.35uV/-116dBm(20dB SINAD) 
0.22uV/-120dBm(20dB SINAD)

Rated audio


Adjacent Channel Selectivity

TIA603C:60dB@ 12.5 KHz 
ETSI: 60dB@12.5 KHz


TIA603C:65 dB 

C0-Channel Rejection

12dB @12.5KHz

Spurious Rejection


Audio distortion @ rated audio


FM Hum and Noise

-40dB @12.5KHz 
-45dB @25KHz

Audio response


Spurious emission

-57dBm@m < 1GHz 
-47dBm@m < 1GHz

Bolck 84db


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The post Retevis RT90 Mobile Dual Band DMR Mobile Radio Review – Part 1 appeared first on QRZ Now – Amateur Radio News.

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