FM Stereo/SW MW LW Digital World Receiver DE1103

Degen 深圳市德劲电子有限公司 Electronics Co. Ltd.; Shenzhen

Data
Forum
Pictures
Collections

  • Year
  • 2015 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 338807

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Main principle
  • DSP, Digital Signal Processor
  • Wave bands
  • Broadcast, Long Wave, more than 2 x SW plus FM or UHF.
  • Power type and voltage
  • Batteries / addl. power jack / AA Ni-MH: 4 x 1.2; 4 x 1.5 / External 8 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 7.7 cm = 3 inch
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: FM Stereo/SW MW LW Digital World Receiver DE1103 - Degen 深圳市德劲电子有限公司 Electronics
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 165 x 105 x 29 mm / 6.5 x 4.1 x 1.1 inch
  • Notes

  • The DEGEN  "DE1103 FM STEREO/SW.MW.LW DIGITAL WORLD RECEIVER" was designed around the SiLabs 4735-D60 DSP IC and came to market in 2015 to replace the original  "DE1103 PLL FM STEREO/SW.MW.LW DUAL CONVERSION SYNTHESIZED WORLD RECEIVER" released in 2004.

    Both versions share the same cabinet design and knobs, with slight differences in lettering in the back and different identification label at the front. Degen even published the same specifications with minor differences.

    To distinguish this new digital version from the original PLL/Double Conversion version, it is also referred to as the DE1103 DSP or else DE1103 V2.

    One distinct characteristic of both versions is the analog like RF band dial where the pointer is simulated by the LCD panel showing a moving horizontal line. A digital display is used to get precision numbers when tuning.

    It features a clock and timer functions, different scanning modes and 255 memory presets.

    The model may either use AA dry batteries, or NiMH rechargeable batteries. The included AC adapter (Output 8VDC, 3.5mm plug, positive at center) can be used to power the radio instead of consuming energy from the installed batteries.

    • If NiMH rechargeable batteries are installed, then the AC adapter can also be used to charge them by manually enabling the charging function. 

    Frequency range

    • FM Frequency: 76.0 - 108.0 MHz, step 25 kHz.
    • AM Frequency: SW, MW, LW 150 - 29999 kHz, step 1 kHz.
      • CW / SSB reception with BFO

    Sensitivity

    • FM: <10 µV
    • MW: <1 mV/m
    • SW: <20 µV

    AM Selectivity

    • Wide mode (6 kHz): >40 dB
    • Narrow mode (4 kHz): >50 dB

     

  • Net weight (2.2 lb = 1 kg)
  • 0.3 kg / 0 lb 10.6 oz (0.661 lb)
  • Author
  • Model page created by Jose Mesquita. See "Data change" for further contributors.

 Collections | Museums | Literature

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The model FM Stereo/SW MW LW Digital World Receiver is part of the collections of the following members.

 Forum

Forum contributions about this model: Degen 深圳市德劲电子有限公司: FM Stereo/SW MW LW Digital World Receiver DE1103

Threads: 1 | Posts: 1

The Degen DSP based version released in 2015 replaced the original PLL double conversion version of 2004.

I have measured the current consumption of the DE1103 DSP unit, expecting to see lower battery consumption when operating, but that was not the case, confirming other publicly available reports from owners and testers. Although the standby current was fairly low fluctuating below 100 uA.

This model monitors the battery state, and it may show the battery level using the Signal level indicator. However, to see it one needs to press the Vol/CHG button to display the battery level for a couple of seconds before returning to the signal level indication.

In my testing, using Ni-MH batteries, when the battery capacity level goes below 3.8V (0.95V per battery), the radio simply powers itself off, so the usability of such battery monitoring feature is limited. I did not test it with 1.5V dry batteries, but I would not expect a different behavior.

The battery monitoring is integrated into the STM8L152C6T6 MCU, where an integrated ZeroPower Power-ON Reset (POR) coupled with a Brownout Reset (BOR) circuitry, and a programmable voltage detector (PVD) monitoring the VDD line compares it to one from 7 levels, from 1.85V and 3.05V, being able to generate an interrupt that would allow to send a warning message.

That interrupt service routine seems to not being used in this model, at it just powers off when the battery level is lower than the programmed theshold level (or else I did not seee the message, probably because if it was displayed, it was for very short amount of time to be noticed).

 

Test conditions

5.5Volt (4 x 1.38V) from 4 x Ni-MH everActive 1900mAh on a external holder conected to the Battery compartment terminals. 

 

Current measurements

Radio sate Current 
Powered Off state (standby) 70 to 100 uA (avg. 80 uA)
LED lights for LCD backlight & keys 28 mA
SW 13m band (21700 kHz) - volume level 00 45 mA
SW 90m band (3300 kHz) - volume level 00 45 mA
MW band (720 kHz) - volume level 00 55 mA
FM band (76.08 MHz)  - volume level 00 67 mA
FM band (98.6 MHz)  - volume level 10 (medium volume) 97 mA
FM band (98.6 MHz) - volume level 26 (high volume) 136 mA

 

 

Jose Mesquita, 17.Jun.22

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