Bfdx dmr digital two way radios bf-td503 walkie talkie

1. BFDX DMR digital two way radios BF-TD503 walkie talkie
Dual mode (Analog & Digital)
Analog & Digital mode adjustable, this is to meet different communication requirements.
TDMA
Channel capacity enlarged with TDMA function.
Audio encryption
TD-503 use audio encryption key to encode and decode calling signal in channel. One radio can
only set one encryption key.
Digital signaling.
Support DMR standard single, group and all calling. Killing and other functions are also
available.
Single calling
Single calling from point to point is available. Disable private communication to be heard by
others.
Group calling
Enable free communication between group members. Member selection can be set through PC
programming.
All calling
Calling can be received by all members from different group in same channel. No obstacle
communication easily available to enable a free job site arrangement.
Killed
The function is to kill the lost two way radio or unit so that the radio or unit can’t TX and RX.
“Killed” function is to protect the private calling to be heart from others.
Monitor
This function is to locate if there is any activity in channel or not. If there is any signal in this
channel, user will hear reminder sound.
Remote monitor
Allow supervisor users to monitor the activity of radio via remote monitor function. This function
also allows users to send the background noise to supervisor.
Emergency remote monitor
Allow supervisor to remote monitor the radio if the emergency alarm function of this radio is
open. Under emergency remote monitor, rescuer can get useful information from the signal TXed
by the radio and allow rescuer quickly make a rescue plan. If this function opened, other
supervisor will remote monitor this radio even if supervise radio is without encoder of remote

2. monitor.
Channel scan
This allows users to cruise through set channels in order to find the one that your group is using.
You can also use this feature to quickly locate an “empty” channel for your group to use.
TOT
This is to prevent the radio from being TX for too long, and avoid the channel from being
occupied unconsciously.
Low battery indication
Allow users to change the battery on time.
Auto battery save
The radio will automatically come into battery saving mode if there is no any activity so as to
extend the standby time.
Noise suppression function
Eliminate the noise to get better audio and communication quality.
Manual dialing
Call out via manual ID dialing in keyboard.
Quick dialing
Allow users call out through quick dial.
PC Programming
Allow users to set the radio on PC via USB programming cable.
Detection
Allow users to remote detect whether the radio is under using via radio detective port.
Remote control
Allow users to remote control radio via radio control port.
SMS
Allow users to send and receive message.
Languages selectable
English and Chinese languages selectable.
Voice announcement
Voice announcement for radio statement.

3. Alarm function
The radio will alarm or silence alarm under emergency situation.
GPS
Allow users to locate the GPS coordinate. And radio can send out or check GPS coordinate.
CTCSS/CDCSS and STE
TD-503 support 39 standard CTCSS and 83 standard CDCSS setting, and also support non
standard CTCSS/CDCSS setting. CTCSS/CDCSS is to avoid the private communication from
being disturbed by other same channel users. It also eliminates the trail noise.
Duplex
Allow users to use the radio like telephone.
IP67
High audio quality.
TD-503 use advanced AMBE+2 vocoder, which highly improved the audio quality.

4. General part
Frequency range: VHF:136-174MHz UHF:350-390 MHz UHF:400-470 MHz
UHF:450-520MHz
Channel capacity: 160
Zone: 50
Channel step: 12.5KHz/25KHz
Working voltage: 7.5V
Batterycapacity: 2800 mAh
Battery working hours（5/5/90） Digital: 20 hours（GPS off）
Analog: 14 hours（GPSoff）
Frequency stability: ±1.5ppm
Antenna impedance: 50 ohm
Size: 133*62*35mm
Transmittance
Output power: VHF high ：4.0W
VHF low ：1.0W
UHF high ：4.0W
UHF low：1.0W
4FSK modulation: 12.5kHz data only：7K60FXD
12.5kHz data and voice: 7K60FXE
FM Modulation: 12.5 kHz：8K50F3E；25 kHz：16KΦF3E；
Modulation limitation: +/- 2.5kHz @ 12.5kHz; +/- 5kHz @ 25kHz
FM noise: -40dB

5. Spurious emission: -36 dBm≤1GHz/-30 dBm≥1GHz
Adjacent power ≤-60dB
Frequency response: +1/-3 dB
Audio distort: 3%
Digital vocoder: AMBE+2™
Receive
Digital Sensitivity: 5% BER：0.25 uV
Analog sensitivity: 0.25 uV (12 dB SINAD)
Intermodulation: 60dB
Adjacent selectivity: 60 dB
Spurious suppression: 70 dB
FM noise: -40dB
Frequency response: +1/-3 dB
Audio power: 1.5W
Audio distortion: 3% (typical)
Conduction radiation: -57dBm
GPS precision: Accuracy of position ≤-10m（with good condition）
TTFF (first location)cold boot < 1 minute（good signal）
TTFF (first location)hot boot < 10 seconds（good signal）
Working conditions
Working temperature: -20℃—60℃
Storage temperature: -30℃—+85℃
Damp proof: According MIL-STD-810C/D/E/F
Shock and vibration: According MIL-STD-810C/D/E/F
IP rate: IP67