TYT MD-750

| mayo 9, 2020

TYT MD-750

DMR two way radio 5W dual time slot dual band UHF/VHF

  • PRODUCT DESIGNATION : DMR Digital Transceiver
  • BRAND NAME  :    TYT
  • MODEL NAME :    MD-750
  • APPLICANT : TYT ELECTRONICS CO., LTD
  • DATE OF ISSUE: Apr. 15, 2020
  • FCC Part 90 Rules STANDARD(S) :    FCC Part 22

TYT MD-750 PRODUCT DESCRIPTION

The EUT is a DMR Digital Transceiver designed for voice/data communication. It is designed by way of
utilizing the FM/4FSK modulation achieves the system operating.

A major technical description of EUT is described as following:

Communication Type Voice / Data
Hardware Version MD750-V2.1.4
Software Version V1.1.1
Modulation FM/4FSK
Emission Type 7K60FXD/7K60FXE/11K0F3E
Emission Bandwidth Analog:10.254KHz(5W-12.5 KHz), 10.251KHz(1W-12.5 KHz) —VHF
Digital: 9.264KHz(5W),9.824 KHz(1W) —VHF
Analog:10.275KHz(5W-12.5 KHz), 10.282KHz(1W-12.5 KHz) —UHF
Digital: 9.828KHz(5W), 9.250KHz(1W) —UHF
Peak Frequency Deviation 1.95KHz
Audio Frequency Response 7.60dB
Maximum Transmitter
Power
Analog:36.90dBm(5W-12.5 KHz), 29.88dBm (1W-12.5 KHz) —VHF
Digital: 36.77dBm(5W), 29.83dBm (1W) —VHF
Analog:36.92dBm(5W-12.5 KHz), 29.85dBm (1W-12.5 KHz) —UHF
Digital: 36.78dBm(5W), 29.81dBm (1W) —UHF
Output power Modification

VHF:5W/1W

UHF:5W/1W

(It was fixed by the manufacturer, any individual can’t arbitrarily change it.)

Data Rate 9600bps/12.5KHz(Channel Spacing)
Antenna Designation Detachable
Antenna Gain 1.2dBi
Power Supply DC 7.4V
Limiting Voltage DC 6.29 V~ 8.51V
Operation Frequency
Range and Channel
Frequency Range: 136 MHz to 174 MHz (VHF) 400 MHz to 470 MHz (UHF)
Channel Separation: 12.5KHz(Digital/ Analog)
Bottom Channel: 136.025MHz
Middle Channel:151.85MHz
Middle Channel:155.025MHz
Middle Channel:161.61MHz
High Channel: 173.975MHz
Bottom Channel: 400.025MHz
Middle Channel: 453.225MHz
Middle Channel: 454.025MHz
High Channel: 469.975MHz
Frequency Tolerance 1.096ppm

 

FCC Rules and Regulations Part 2.202: Necessary Bandwidth and Emission Bandwidth

For FM Mode (ChannelSpacing: 12.5kHz)

Emission Designator 11K0F3E

In this case, the maximum modulating frequency is 3.0 kHz with a 2.5 kHz deviation.

BW = 2(M+D) = 2*(3.0 kHz + 2.5 kHz) = 11 kHz = 11K0

F3E portion of the designator represents an FM voice transmission


Therefore, the entire designator for 12.5 kHz channel spacing FM mode is 11K0F3E.

For FM Mode (Channel Spacing: 25kHz)

Emission Designator 16K0F3E

In this case, the maximum modulating frequency is 3.0 kHz with a 5.0 kHz deviation.

BW = 2(M+D) = 2*(3.0 kHz + 5.0 kHz) = 16 kHz = 16K0

F3E portion of the designator represents an FM voice transmission

Therefore, the entire designator for 25 kHz channel spacing FM mode is 16K0F3E.

For Digital Mode (Channel Spacing: 12.5 kHz)

Emission Designator 7K60F1D and
7K60F1E

The 99% energy rule was used for digital mode. It basically states that 99% of the modulation energy falls
within X kHz, in this case, 7.60 kHz.

F1D and F1E portion of the designator indicates digital information.

Therefore, the entire designator for 12.5 kHz channel spacing digital mode is 7K60F1D and 7K60F1E.

TYT MD-750 Manufactured Key Specifications/Special Features:

  • •CTCSS/DCS
    •Programmable CTCSS/DCS
    •Wide/Narrow band selectable
    •End-tone detection
    •DTMF encode/decode
    •PTT ID
    •Password
    •Firmware update
    •Dual time slot for point to point
    •Dual time slot for repeater
    •FM radio
    •5 watt output power
    •Remote monitor/Emergency alarm
    •Contact view and edit
    •Message view and edit
    •PC programmable function
    •1750Hz tone
    •Torch function
    •Dual band/Dual display/Dual standby

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