Showing posts with label Digital. Show all posts
Showing posts with label Digital. Show all posts

Thursday, January 25, 2018

FT8

Monday, December 5, 2016

BuyTwoWayRadios.com: MD-2017 Dual Band DMR Digital HT

BuyTwoWayRadios.com - New dual band DMR digital radio coming from TYT:

"Details are still sketchy, but TYT has released a few specs on this new handheld. Key features of the TYT MD-2017:
  • Dual band 
  • Dual display 
  • Dual standby 
  • Complies with ETSI TS 102 360-1, -2, -3 
  • Uses Time Division Multiple Access (TDMA) 
  • Compatible with MotoTRBO Tier 1 and II 
  • GPS capable 
  • Lone worker function 
  • Encryption function 
  • Analog and Digital Modes 
  • SIngle Call, Group Call and All Call 
  • Remote Kill/Stun/Activate 
  • IP67 Waterproof. 
  • Firmware upgradeable 
Rumour has it the MD-2017 could arrive sometime in March 20-17. However, no official release date has been set. For the latest updates on this new radio, Keep checking in at Buy Two Way Radios subscribeto our blog!"


Thursday, July 28, 2016

Digital Voice on VHF/UHF

"I've been living in a bit of an alternate reality, thanks to shooting video at the ARRL/TAPR Digital Communications Conferences and at some of the more esoteric forums at Dayton and other hamfests. In that universe - actually more of a future than a present - we don't have to choose which closed system we want to buy into. We don't have to carry three or four handhelds around to cover all the modes, and hope our belt is strong enough to keep our pants up (and guaranteeing a feature spot on HamSexy). We can operate a single radio that can run all the DV modes, along with analog FM. 
That radio doesn't exist today, but it will."

Wednesday, June 8, 2016

Streaming DMR

Posting this again as it seems timely...

Hose Line:
"Hose line is an online streaming platform for the HAM radio Digital Mobile Radio (DMR) Brandmeister network. The project is still under heavy development, so if you encounter bugs, please try again at a later stage."
Via @PD0ZRY

Thursday, March 24, 2016

Stream DMR

Hose Line:
"Hose line is an online streaming platform for the HAM radio Digital Mobile Radio (DMR) Brandmeister network. The project is still under heavy development, so if you encounter bugs, please try again at a later stage."
Via @PD0ZRY

Monday, December 7, 2015

Wouxun KG-D901: DMR HT

Is it real? Will it be real? I had seen the image before. The BuyTwoWayRadios guys discuss what we know - which is basically only what you can see in the picture below. Wouxun won't confirm or deny the existence of the DMR radio.



Image via Simon The Wizard

Monday, November 30, 2015

From the Making Stuff Up Department

And while I'm stirring up trouble on Twitter and posting about the Baofeng Tech UV-2501 and Baofeng Tech UV-5001, should I read anything into the fact that both radios are explicitly listed as "analog" two-way radios?

Crank up the rumor mill - the digitals must be on the way. ;)

I have no shame.

Thursday, March 6, 2014

Digital Radio Yahoo Group

David (K7DB) shared this with me and I'm passing along the information for those who might be interested:
NEW FORUM FOR DIGITAL RADIO 
I read on Feb. 21 that the owner of the digitalradio Yahoo group decided to end the group. 
In my judgment there is benefit coming from the existence of a forum where digital radio enthusiasts can exchange information and help each other. I have therefore created the Yahoo group DigitalRadio2 to serve as such a forum, and I invite you to join. 
Group link: https://groups.yahoo.com/neo/groups/digitalradio2/info

Saturday, December 21, 2013

Kirisun K700: Digital VHF HT

Thanks to Christian for the heads up via this tweet. Just in time for Christmas (well, not if you actually want one), the Kirisun K700 Digital VHF HT for $135.00 (USD).


Brand Name: Kirisun
Storage Channel: 256
Dimensions: 116mm x54mmx30mm
Frequency Range: 136-174MHz
Model Number: K700
Channel Spacing: 12.5KHz
Operating Voltage: 7.5V DC ±20%
Battery: 1500mAH Li-ion
RF Output Power: 4W/ 1W
Color: Black
Weight: 243g

KIRISUN K700 The transceiver is a micro-miniature multiband FM transceiver with extensive receive frequency coverage, providing local-area two-way amateur communications along with unmatched monitoring capability

Features:

Product Features:
Excellent noise suppression, digital voice clarity
Digital / analog compatible analog devices to ensure a smooth transition
Ten million sets of figures key voice encryption, safe and secure
Digital intelligent signaling, richer management scheduling function

Function Description:
1. FDMA frequency division multiple access technology, spectrum efficiency improved several times;
2. support digital mode, analog mode
3. the digital voice encryption
4. a variety of call mode, all call, group call, a call, emergency call
5. PTT default contact (group) call
6. the emergency alarm (single, joint) 3 × 4 modes
7. Stun, activate
8. the working status query
9. the digital power saving mode
10. 1.8-inch large LCD display, support icon display for easy SMS messages, call records read;
11. low power, signal strength, battery capacity display, real-time understanding work status
12. call history, call records can be displayed 20;
13. address book function, support 50 contacts;
14. you can edit SMS function, the default shortcut short message
15. manual dialing
16. calls and SMS ringing Tips
17. firmware programming mode (software upgrades);

General features:
1. in English operation interface
2. the emission of high and low power selectable
3. three-color LED indicates sending, receiving, scanning and other state
4. channel lock, keypad lock function
5. whisper function
6. sub audio / digital tone
7. the end eliminate
8. the monitoring function
9. mixed scanning
10. TOT emission limit protection
11. the calculator

Specifications:
General
Frequency Range
136-174MHz
Channel Capacity
256
Channel Spacing
12.5KHz
Operating Temperature
-25°c~ +55°c
Operating Voltage
7.5V DC ±20%
Battery
1500mAH Li-ion
Frequency Stability
±2.5 ppm
Dimension (with battery and antenna)
116mm x54mmx30mm
Weight (with battery and antenna)
243g
Transmitter
RF Power Output
4W/ 1W
Frequency Modulation
16KφF3E/11KφF3E (Analog)
4FSK(Digital)
Antenna Impedance
50Ω
Modulation Limiting
±2.5kHz
Radiated Spurious Emission
-36dBm < 1GHz
-30dBm > 1GHz
FM Noise
45dB 25KHz
40dB 12.5KHz
Modulation Distortion
< 3%
Receiver
Reference Sensitivity
0.25μV 12.5KHz
Adjacent Channel Selectivity
60dB 2.5KHz
Intermodulation
60 dB
Spurious Response Rejection
60 dB
Rated Audio Output
1W
S/N
45/40
Rated Audio Distortion
≤3%

Package Contents:
  • 1 x Kirisun K700 Digital Two-way Radio(VHF 136-174MHz)
  • 1 x 7.4V 1500mAh KB-760 Li-ion Battery
  • 1 x VHF 136-174MHz Antenna.
  • 1 x Belt Clip.
  • 1 x ENG Manual
  • 1 x Charger with Adapter (Provide PSU plug for your Country)
  • 1 x Hand STRAP

Friday, June 7, 2013

Kirisun S780: Digital UHF HT

A while back the 409Shop posted a teaser for a V689U digital radio and some folks pointed out that it might be a Kirisun radio.

This morning I saw that the 409Shop is featuring the Kirisun S780 Digital UHF (400 - 470) handheld transceiver for $128 USD:
"The transceiver is a micro-miniature multiband FM transceiver with extensive receive frequency coverage,providing local-area two-way amateur communications along with unmatched monitoring capability."

Number 17 is a good sign - firmware updates!

Product Features:
Excellent noise suppression, digital voice clarity
Digital / analog compatible analog devices to ensure a smooth transition
Ten million sets of figures key voice encryption, safe and secure
Digital intelligent signaling, richer management scheduling function
Function Description:
1, FDMA frequency division multiple access technology, spectrum efficiency improved several times;
2, support digital mode, analog mode
3, the digital voice encryption
4, a variety of call mode, all call, group call, a call, emergency call
5, PTT default contact (group) call
6, the emergency alarm (single, joint) 3 × 4 modes
7, Stun, activate
8, the working status query
9, the digital power saving mode
10, 1.8-inch large LCD display, support icon display for easy SMS messages, call records read;
11, low power, signal strength, battery capacity display, real-time understanding work status
12, call history, call records can be displayed 20;
13, address book function, support 50 contacts;
14, you can edit SMS function, the default shortcut short message
15, manual dialing
16, calls and SMS ringing Tips
17, firmware programming mode (software upgrades);

General features:
1, in English operation interface
2, the emission of high and low power selectable
3, three-color LED indicates sending, receiving, scanning and other state
4, channel lock, keypad lock function
5, whisper function
6, sub audio / digital tone
7, the end eliminate
8, the monitoring function
9, mixed scanning
10, TOT emission limit protection
11, the calculator


Technical parameters
S780U
General Specifications
Frequency
400470MHz
Number of channels
256
Channel spacing
12.5kHz
Operating Temperature
-25~+55
Antenna Impedance
50Ω
Microphone impedance
2.2kΩ
Frequency Stability
±2.5ppm
Battery (standard configuration)
Model: KB-760, lithium battery
DC 7.5V ± 20% 1500mAh
Volume (length × width × thickness)
116 mm x54 mm x30 mm
Weight
136 g (main unit only) / 240 g (with battery and antenna host)
Receiving part
Sensitivity
-121dBm
Adjacent Channel Selectivity
60
Intermodulation Immunity
60dB
Spurious response
60dB
Audio output power
≥ 1000mW (distortion is less than 5%, 16Ω load)
Audio response
Analog: +2 / -6 dB
Transmitting section
RF Power
4W (High) / 1W (low)
Modulation
Digital: 4FSK Analog: 11KΦF3E
Clutter and harmonic
-70dBm
SNR
Analog:> 35 dB
Audio Distortion (300-3000Hz)
5%
Modulation limit
Digital: ± 2.5kHz
Modulation characteristics
Analog: +2 / -6 dB