1. Introduction
The Tecsun CR-1100DSP is a high-performance two-band stereo radio featuring advanced Digital Signal Processing (DSP) technology. It is designed to provide superior sensitivity, selectivity, signal-to-noise ratio, and anti-interference capabilities for an enhanced listening experience. This manual provides detailed instructions for setting up, operating, and maintaining your radio.
2. Key Features
- Advanced DSP Technology: Utilizes a SILICONLABS DSP chip for digital conversion and demodulation of analog FM/AM signals, significantly improving performance.
- Dual Band Reception: Receives FM and AM (Medium Wave) radio stations.
- FM Stereo: Enjoy FM stereo broadcasts through earphones.
- Multifunctional LCD Display: Shows radio frequency, electric field strength, signal-to-noise ratio, temperature, clock, and battery capacity.
- Automatic Tuning Storage (ATS): Easily search and store radio stations automatically.
- Memory Presets: Stores 100 radio frequencies for both FM and AM bands. Includes 5 dedicated shortcut buttons for frequently listened FM1, FM2, and MF stations.
- Multiple Tuning Methods: Supports automatic search, manual search, and manual/automatic recall of stored stations.
- High-Quality Audio: Equipped with a 4-inch speaker and adjustable high/low tone controls for rich sound.
- Timing Functions: Features dual timing for automatic power-on and intelligent sleep for automatic power-off.
- Audio Input/Output: Automatic identification line input/output sockets allow use as an active MP3 speaker or output to external amplifiers.
- Power Options: Operates on 4 R20 (large) batteries or an optional 6V DC external power supply.
3. Setup
3.1 Power Supply
The Tecsun CR-1100DSP can be powered by batteries or an external DC power supply.
- Battery Installation: Open the battery compartment cover located on the rear of the radio. Insert 4 R20 (large) batteries, ensuring correct polarity. Close the cover securely.
- External DC Power: Connect a 6V 300mA DC adapter (outer positive, inner negative) to the external power socket on the rear of the radio.
3.2 Antenna
- FM Reception: Extend the telescopic antenna fully for optimal FM signal reception.
- AM (Medium Wave) Reception: The radio has a built-in ferrite bar antenna for AM reception. For stronger signals, you may use an external AM antenna connected to the external antenna connector on the rear.
4. Operation
4.1 Basic Controls
- Power On/Off: Press the 'Power/Timing shutdown' button on the top panel.
- Volume Adjustment: Use the 'Volume adjustment' knob on the front panel.
- Tone Control: Use the 'High and low tone' knob to adjust audio characteristics.
- Band Selection: Use the 'Multifunctional Knob' to switch between FM and AM bands.
4.2 Tuning and Storing Stations
The radio offers several methods for finding and saving stations:
- Automatic Search and Store (ATS): Press and hold the 'Multifunctional Knob' to initiate ATS. The radio will scan and automatically store available stations.
- Manual Search: Rotate the 'Multifunctional Knob' to manually tune to a desired frequency.
- Recalling Stored Stations: Use the 'Often listen radio shortcut keys (1-5)' for quick access to your favorite stations. For other stored stations, use the 'Multifunctional Knob' to navigate through memory presets.
4.3 Using Audio Input/Output
The radio features 3.5mm audio input/output jacks:
- Headset: Connect 32Ω earphones to the 'Headset' jack for private listening.
- Line Input: Connect an external audio source (e.g., MP3 player, mobile phone, tablet, computer) to the 'Line input/output' jack to use the radio as an external speaker.
- Line Output: Connect the 'Line input/output' jack to an external amplifier or recording device to output the radio's audio.
4.4 Timing Functions
- Dual Timing Automatic Power-on: Set two separate times for the radio to automatically turn on. Refer to the detailed instructions in the full manual for setting 'Timing A' and 'Timing B'.
- Intelligent Sleep Automatic Power-off: The radio can be set to automatically power off after a specified period. Use the 'Snooze' button or timing settings to activate this feature.
5. Maintenance
- Cleaning: Wipe the radio with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Care: Remove batteries if the radio will not be used for an extended period to prevent leakage.
- Storage: Store the radio in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Dead batteries or incorrect power adapter. | Replace batteries or check external DC power supply connection and specifications. |
| Poor reception | Antenna not extended, weak signal, or interference. | Fully extend the telescopic antenna. Try repositioning the radio. For AM, consider an external antenna. |
| No sound from speaker | Volume too low, headphones connected, or mute activated. | Increase volume. Disconnect headphones. Check if mute function is active. |
| LCD display not working | Low battery or internal fault. | Replace batteries. If problem persists, contact support. |
7. Specifications
| Feature | Detail |
|---|---|
| Product Model | Desheng CR-1100DSP |
| Color | Black |
| Frequency Range FM 1 | Standard: 87-108 MHz (Can be set to US: 88-108 MHz, Japan: 76-90 MHz) |
| Frequency Range FM 2 | 65-108.0 MHz (covering part of campus broadcasting) |
| Frequency Range AM | Standard: 522-1620 kHz (United States: 520-1710 kHz) |
| Number of Stored Frequencies | 300 |
| Noise Limit Sensitivity FM | Better than 3uV |
| Noise Limit Sensitivity Medium Wave | Better than 0.5mV/m |
| FM Stereo Separation | Better than 20 dB |
| Output Power | 1000mW |
| Power Supply (Batteries) | 4 x R20 (large) batteries |
| Power Supply (External DC) | 6V 300mA (outer positive and inner negative) |
| Internal Speaker | 133mm 8Ω 2W |
| External Earphone Impedance | 32Ω |
| Dimensions (WxHxD) | Approx. 258 x 148 x 63mm |
| Weight | Approx. 1kg (without battery) |
| Accessories | 3.5mm audio cable, manual, after-sales service guarantee, certificate |
8. User Tips
- Language Settings: If you are looking for an English version of the interface or manual, please refer to the included manual or contact customer support for language options.
- Signal Stability: For best signal stability, especially in areas with weak reception, try to place the radio away from electronic devices that might cause interference.
- Audio Quality: Experiment with the high and low tone knobs to find your preferred audio balance for different types of broadcasts.
9. Frequently Asked Questions
- Q: Is an English version of the manual available?
- A: Yes, an English version of the manual is typically included with the product. If you received a manual in a different language, please contact customer support for assistance.
10. Warranty and Support
Your Tecsun CR-1100DSP radio comes with an after-sales service guarantee. Please refer to the included certificate for specific warranty terms and conditions. For technical support or service inquiries, please contact the retailer or manufacturer directly.