Pocket FM

Pocket FM transmitter

Pocket FM is a small, low-powered radio transmitter designed for use in areas with tightly controlled or undeveloped communications infrastructure. The devices are portable and have the appearance of a receiver rather than a transmitter, making them more practical for citizen use and harder for authorities to detect when used subversively in pirate radio networks. It was designed by German-based non-profit organization Media in Cooperation and Transition (MiCT) in 2013 and has been deployed in Syria to create the radio network called Syrnet.


MiCT led the project as an extension of its work on media projects to empower people in areas of conflict and crisis.[1][2] The device's design is a result of the organization's collaboration with German design firm IXDS.[3]

Radio, as an analog medium, is more difficult than Internet and phone networks to shut down, requires less physical infrastructure, and its use is less dependent on a functional electric grid.[4][5] For these reasons radio is a common medium among resistance and other independent groups.

The shoebox-sized device's appearance, as described by The Local, is "a black box about thirty centimeters in length and twenty wide. It is smooth and light with a corrugated surface."[5] Its design emphasizes portability and an appearance unlike typical transmitters.

Technical overview

Radio stations typically use large transmitters to produce strong signals broadcast across large areas. However, large transmitters are very expensive, challenging to maintain, and provide highly visible targets for those wishing to sabotage, raid, hijack, or otherwise interrupt communications. The idea behind Pocket FM is to instead create a network of many small transmitters to blanket an area. Each device has a range of 4–6 kilometres (2.5–3.7 mi) using only a 1 metre (3 ft 3 in) antenna.[6][2][7][8][9]

Pocket FM has the ability to change frequencies in case the default frequency is jammed or otherwise unavailable, and broadcasts a signature using the Radio Data System (RDS) protocol to allow listeners to find the new station.[2][7][8] RDS can also be used to broadcast other text-based messages to users with compatible tuners.[2]

The device can be used with solar power and runs at 12 volts of electricity, making it possible for it to function when plugged into a car's cigarette lighter receptacle.[10][8] The device also comes with a built-in satellite receiver to receive Internet-delivered feeds or download content to broadcast over-the-air.[2][6] They are capable of operating autonomously for extended periods when given a steady power supply, and can be passcode-protected to prevent unauthorized transmission.[9][2][7][8]

The computational foundation of the device is Raspberry Pi, an inexpensive, customizable computer platform about the size of a credit card.[2] The use of Raspberry Pi helps to keep the cost of the units minimal, but its simple, open design also allows for flexibility and experimentation with different configurations and upgrades.[6]

The design for the next generation of Pocket FMs will include GSM to allow them to be remotely operated by text message, a precaution which further removes operators from the broadcast itself.[6]


A woman using Pocket FM to broadcast from her vehicle in Tanzania

Pocket FM was first deployed in Syria in September 2013. Since then MiCT has also started a project in Sierra Leone and smaller initiatives in Yemen and Tanzania.[2] As of December 3 MiCT has produced about two dozen units.[6]


Main article: Syrnet

Pocket FM was developed for use in Syria.[4][11] Throughout the Syrian Civil War, president Bashar Assad has exerted control over communications infrastructure, frequently disabling Internet, phone networks, and electricity, and making frequent use of propaganda and misinformation in state-run mass media.[5][12][13] But when other modes of communication become unavailable and unbiased reporting is inaccessible, most Syrians still have access to a radio receiver, either as a battery-powered stand-alone device or as part of a cell phone.[5]

Syrnet, a radio network enabled by Pocket FM, launched in September 2013 to provide information that would be censored or manipulated if reported on by state-run media.[4][11] As of December 2015, Syrnet operates nine stations in different areas of the country, including areas controlled by the Islamic State of Iraq and the Levant (ISIS).[10][14] In addition to allowing for reports to be shared with other regions where the situation may be very different, the use of a structure with multiple centers of operation ensures that a raid on one does not pose an existential threat to the broadcast.[10][11]

The units change hands multiple times in order to get them into the country, ending up with a local resident who has identified a potential location to hide the transmitter, as far from civilian homes as possible without losing the signal.[14] Given the political climate, the frequency with which journalists and activists have been detained or even killed, and the ease with which any radio transmitter can be triangulated even if not visually identified, precautions are necessary. According to MiCT project manager Philip Hochleichter, none of the units have been discovered as of December 2, and only one has been lost, due to bombing in Kobanî.[6][14]

The network combines local and external content, which is broadcast throughout the country via Pocket FM as well as through NileSat and Internet downloads.[2] The radio network approach to broadcasting allows Syrian citizens access to censored outside broadcasts, creates a sustainable system for communications between and about different parts of the country and the dissemination of stories to a global audience.[2] To help local stations and reporters, MiCT employs a team of professionals from the journalism field to assist with production.[6]

Sierra Leone

MiCT is working with Culture Radio, a Freetown media organization, to disseminate information about Ebola to communities in Sierra Leone who have not had access to other campaigns about the disease and its prevention.[2]

See also


  1. "About mict". MiCT. Retrieved 20 January 2016.
  2. 1 2 3 4 5 6 7 8 9 10 11 Wang, Shan (28 September 2015). "This portable FM transmitter brings information to people in crisis". NiemanLab. Retrieved 20 January 2016.
  3. "Pocket FM". IXDS. Retrieved 20 January 2016.
  4. 1 2 3 Nicholson, Esme (20 January 2016). "European Pirate Radio Network Broadcasts Alternative To Syria's State Media". Morning Edition. NPR. Retrieved 20 January 2016.
  5. 1 2 3 4 Luyken, Jörg (22 October 2015). "Berlin NGO smuggles pirate radio into Syria". The Local. Retrieved 20 January 2016.
  6. 1 2 3 4 5 6 7 Vallance, Chris (1 March 2016). "Raspberry Pi-powered transmitters broadcast Syrian radio". BBC News.
  7. 1 2 3 Jordans, Frank (22 December 2015). "Radio rebels: Berlin group makes tiny transmitters for Syria". St. Louis Post-Dispatch. Retrieved 20 January 2016.
  8. 1 2 3 4 "Pocket FM". Pocket-fm.com. Retrieved 20 January 2016.
  9. 1 2 "Berlin journalists create tiny transmitters for Syrian opposition". CTV News. Associated Press. 23 December 2015.
  10. 1 2 3 Gillenberg, Natasha (12 December 2015). "Syrisches Dissidentenradio aus Berlin" [Syrian dissident radio from Berlin]. Deutschlandfunk (in German). Retrieved 20 January 2016.
  11. 1 2 3 Croitoru, Joseph (11 June 2014). "Flourishing despite the violence". Qantara.de. Retrieved 20 January 2016.
  12. Watson, Ivan; Razek, Raja; Abedine, Saad (9 October 2012). "Defecting Syrian propagandist says his job was 'to fabricate'". CNN. Retrieved 20 January 2016.
  13. Maloney, Dan (3 March 2016). "Swam of Tiny Pirate Transmitters Gets the Message Out in Syria". Hackaday.
  14. 1 2 3 Collard, Rebecca (1 February 2016). "Hidden transmitters can relay signals to areas controlled by ISIS and the Syrian government". Time.

External links

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