XHDATA D-808 Portable Digital Radio Receiver User Manual

1. Safety Warnings

• Do not expose the radio to water, moisture, or excessive humidity.
• Operating temperature range is 0°-40°C (32°-104°F).
• Remove the battery immediately if liquid has been spilled or debris have fallen into the unit.
• Clean with a dry cloth. Do not use detergents or chemical solvents.
• Do not attempt to open the unit. This prevents damage to sensitive components.

2. Product Overview

The XHDATA D-808 is a multiband aviation band radio receiver featuring DSP technology for enhanced sensitivity and selectivity. It supports FM, AM, SW, MW, LW, AIR, and SSB bands, and includes RDS functionality.

Figure 2.1: Multiband Aviation Band Radio Overview

2.1. Front View

The front panel features the speaker, LCD display, and various control buttons for band selection, tuning, alarm, and memory functions.

Figure 2.2: Front View of the Radio with Display and Controls

2.2. Display Information

The LCD display provides essential information about the radio's status and current operation.

Figure 2.3: Detailed Display Information

• Battery charge indicator
• Sleep timer active
• Key press beep active
• Alarm on
• Frequency Display (kHz or MHz)
• Display temperature mode
• Signal strength
• Noise level
• Band selection
• FM Stereo signal
• FM RDS available
• Frequency
• RDS Information
• USB / LSB mode
• Squelch active
• Alarm active
• Station Memory Mode
• Radio keys locked
• Tuning knob speed

2.3. Side Controls

The side of the radio houses the external antenna jack, volume control, headphone jack, main tuning knob, fine tuning control, and USB charging port.

Figure 2.4: Side Controls

• External antenna jack (3.5mm)
• Volume control
• Headphone jack (3.5mm)
• Main Tuning knob (push in for FAST / SLOW / STOP)
• Fine tuning / clarity control for SSB
• USB Charging port
• Radio reset button access hole

2.4. Rear View

The rear of the radio includes the whip antenna, heat dissipation area, built-in bracket, and battery compartment.

Figure 2.5: Rear View

• Whip antenna used for FM, SW and AIR bands
• Kickstand (built-in bracket)
• Battery door (18650 battery included)
• Heat Dissipation Area

3. Setup

3.1. Battery Installation

The radio is powered by a rechargeable 18650 Lithium battery. Ensure correct polarity during installation.

Figure 3.1: Battery and Power Supply

1. Install 1 x 18650 battery in the battery compartment, taking care to align the polarity of the battery (+/-).
2. The radio can also be powered via the Type-C USB charging port.

3.2. Power On/Off and Initial Settings

1. Turn on the radio by pressing the [POWER] button.
2. To skip the sleep time setting, press any button after powering on.
3. Adjust the volume by rotating the [VOLUME] knob on the left side of the radio. Rotate up for more volume, down for less.

3.3. Setting FM Tuning Range

The radio supports different FM tuning ranges for various regions.

1. With the radio off, long-press the [FM] button. The current lowest frequency of the band will be displayed.
2. Press the [FM] button again to cycle through the options: 64.0 MHz, 76.0 MHz, 87.0 MHz, 87.5 MHz.

3.4. Setting Medium Wave Step (MW)

The tuning step for MW can be set to 9 kHz or 10 kHz.

1. Turn the radio off and long-press the [9/10 kHz] button (number 0).
2. Press the button again to switch between 9 kHz and 10 kHz.

3.5. Enabling Long Wave (LW)

The LW band is disabled by default.

1. Turn the radio off and long-press the [LW/MW] button. The display will show "LW ON" or "LW OFF".
2. Press the [LW/MW] button to toggle the setting.

3.6. Setting Temperature Display

You can select between Fahrenheit or Celsius for temperature display.

1. With the radio off, repeatedly press the [DISPLAY] button until the temperature is shown.
2. Long-press the [number 3] button to change the setting. Repeatedly press to toggle between °F and °C.

3.7. Setting the Time

The radio clock supports 24-hour time display.

1. Turn the radio off and long-press the [TIME SET] button. The radio will display "TIME".
2. Key in the 4-digit time to set. The mode automatically exits after about 5 seconds of inactivity.
3. To enable automatic time setting from an FM broadcast station (if available), press the [TIME SET] button with the radio off. Use the [UP arrow] key to switch between Auto and Manual modes.

3.8. Setting the Alarm

1. With the radio turned off, long-press the [ALARM] button.
2. Use the 0-9 keys to directly enter the alarm time.
3. Quickly press the [ALARM] button, then the "ALARM" icon will flash. Use the [Up Arrow] or [Down Arrow] button to select the alarm type: Radio Broadcast Alarm, Buzzer Alarm, or Alarm off.
4. To turn off a sounding alarm, press the [Power] button. To snooze for 10 minutes, press any other button.

3.9. Setting the Sleep Timer

The Sleep Timer automatically shuts off the radio after a set duration.

1. Quick press the [POWER] button.
2. The display will cycle through 120, 90, 60, 45, 30, 15 minutes. Setting to "ON" turns off the Sleep Timer.

4. Radio Operation

4.1. Antennas

The D-808 radio is equipped with three antenna options for optimal reception across different bands.

Figure 4.1: Antenna Options

• Internal ferrite bar antenna: Used for LW/MW reception. This antenna is directional; physically turn the radio for best reception.
• 25.5" telescopic whip antenna: Used for SW/FM/AIR reception. This antenna can be rotated 360 degrees.
• 3.5mm jack for external antenna: Connect an external antenna of your choice for improved SW/FM/AIR reception.

Caution: Ensure that an external antenna is clear from power lines.

4.2. Search Radio Frequency

There are several ways to find radio stations:

Manual Search

1. Turn the [Tuning] knob to change the frequency.
2. Use the [Fine Tuning] thumb wheel for smaller steps.
3. Press the [Up or Down Tuning Arrow] to change the frequency.

Note on Tuning Speed: The tuning knob has FAST, SLOW, and STOP modes. Press the [Tuning] knob inwards to switch modes. The display shows the current mode.

• Fast: advances 5 kHz (3 kHz on LW, 9/10 kHz on MW, 25 kHz on AIR, 100 kHz on FM).
• Slow: advances 1 kHz (10 kHz on FM).
• Stop: does not advance.

Auto Search (ATS Function)

ATS automatically searches and stores strong signals.

1. Long-press a band button ([FM], [LW/MW], [SW], [AIR]). The screen will display "ATS___".
2. The radio will automatically search all frequencies in the band and store strong signals.

Note: Avoid areas with high electromagnetic interference for more accurate results. Strong signals are not always broadcast towers; they can be interference.

Direct Frequency Input

1. Press the [FREQ] button to enter keyboard input mode.
2. Enter the desired frequency using the numeric keypad.
3. Press [FREQ] again to confirm.

Note: If the entered frequency does not exist in the band, an "Error" symbol will be displayed.

4.3. Memory System

The radio can store up to 500 radio frequencies, divided into 50 storage pages (100 per band).

Figure 4.2: Memory Storage Capacity

Manual Memory Storage

1. Select the desired band (FM, MW, LW, SW, or AIR).
2. Press the [PAGE] button, then a page number (0-9) to select a memory page.
3. Long-press a position number button (0-9) to save the current frequency. The radio will display "PAGE-SAVE".

To recall a saved station, press the number button (0-9) of the memory position within the current page. The radio will display "PAGE-LOAD".

Auto Tune Storage (ATS)

ATS scans bands and automatically stores stations, overwriting previous entries. It is invoked by selecting the band and long-pressing the band button (FM, LW, MW, SW, or AIR). ATS stores relatively stronger stations.

Note: For shortwave, ATS scans only within international broadcast frequencies, not amateur radio or commercial bands.

4.4. Bandwidth (BW)

Bandwidth adjustment helps reduce interference from adjacent stations. This feature is available on LW, MW, and SW.

1. Press the [AM BW] button to select bandwidth.
2. Repeated presses cycle through values: 6, 4, 3, 2.5, 2, 1.8, and 1 kHz.
3. In SSB mode, bandwidths are 4, 2, 2.2, 1.2, 1, and 0.5 kHz.

Higher bandwidth generally means better audio fidelity, while lower bandwidth reduces interference and noise.

4.5. Squelch Function

Squelch mode mutes the radio until a signal stronger than a set level is received. It works on all bands.

1. Long-press the tuning knob inwards. When "Squelch" appears, rotate the tuning knob to set the squelch level (1-9 or OFF).

The higher the number, the stronger the signal needed to activate the radio. The optimum level is usually the highest number without background noise. Turning squelch off may enable reception of weak signals.

Note: If no signals are received, check if squelch is unintentionally turned on.

4.6. Display Mode

The [DISPLAY] button cycles through different information on the screen:

• Signal strength / Signal to noise ratio (dBu / dB)
• Time
• Temperature
• Alarm time

4.7. FM Reception

1. Fully extend the whip antenna.
2. Press the [FM] button.
3. Tune using manual search, auto search (ATS), or direct frequency input.

4.8. FM RDS (Radio Data System)

RDS allows FM stations to transmit data like station name (PS), date/time (DATE), program type (PTY), and radio text (RT).

• When RDS is present, the RDS icon appears on the display.
• Use the [INFO] button to cycle through RDS data options.
• RDS date information can automatically set the radio clock.

4.9. MW (Medium Wave) Reception

1. Press the [LW/MW] button.
2. Tune using manual search, auto search (ATS), or direct frequency input.
3. Rotate the radio for best reception (due to directional internal antenna).

4.10. LW (Long Wave) Reception

1. Ensure LW is enabled (see Setup section).
2. Press the [LW/MW] button to switch to LW band.
3. Tune using manual search, auto search (ATS), or direct frequency input.
4. Rotate the radio horizontally for best reception.

4.11. SW (Shortwave) Reception

1. Fully extend the whip antenna.
2. Press the [SW] button. Repeated presses cycle through 14 international shortwave broadcast bands.
3. Tune using manual search, auto search (ATS), or direct frequency input.
4. Position the radio for best reception.

Shortwave Bands: 120m (2300-2495kHz), 90m (3200-3400 kHz), 75m (3900-4000 kHz), 60m (4750-5060 kHz), 49m (5730-6200 kHz), 41m (7100-7300 kHz), 31m (9250-9900 kHz), 25m (11500-12160 kHz), 22m (13570-13870 kHz), 19m (15300-15800 kHz), 16m (17480-17900 kHz), 15m (18900-19020 kHz), 13m (21450-21850 kHz), 11m (25670-26100 kHz).

4.12. Single Side Band (SSB)

SSB mode allows for more professional listening by capturing every signal.

Figure 4.3: SSB Capabilities

1. Tune to the desired station for the strongest signal.
2. Press the [SSB] button. The display will show either Upper Side Band (USB) or Lower Side Band (LSB).
3. Use the [INFO] button to switch between USB and LSB. LSB is typically used for frequencies below 7300 kHz, and USB for over 14000 kHz.
4. To exit SSB mode, press the [SSB] button again; the radio will display "NORMAL".

4.13. Fine Tuning

• In SSB mode, use the [FINE TUNE] knob on the right side of the radio. Turning it upward displays "FINE 1+99", downward displays "FINE 1-99", indicating the offset from the displayed frequency.
• In other band modes, rotate the [FINE TUNE] knob for slight adjustments or to reduce interference.

4.14. AIR Band Reception

To receive aviation transmissions:

1. Fully extend the whip antenna.
2. Press the [AIR] button.
3. Tune using manual search, auto search (ATS), or direct frequency input.

Air band is best received near airports. You can find approach frequencies for local airports online.

5. Other Operations

5.1. Earphone Jack

For private listening, connect headphones or earbuds to the 3.5mm earphone jack.

Figure 5.1: Headphone Jack and Speaker

5.2. DC Jack

You can power your radio with an AC wall adapter via the DC-IN 5V port. Ensure the DC voltage matches the radio's marking to prevent damage.

5.3. External Antenna Jack

Connect an external antenna to the 3.5mm phone jack to improve reception on FM, SW, and AIR Bands.

5.4. Back Stand

Flip out the panel on the back to prop up your radio for easy control, better audio, and optimal viewing.

6. Troubleshooting

6.1. Resetting the Radio

If the radio becomes inoperable, you can attempt a reset.

1. Locate the Reset hole on the bottom of the radio.
2. Push a small object (like a paperclip) into the hole until you feel a click.

Take care not to press too hard and damage the radio.

7. Specifications

7.1. Accessories Included

• 1 x Storage bag
• 1 x External antenna
• 1 x Type-C charging cable
• 1 x 18650 battery
• 1 x English user manual (PDF available for reference)
• 1 x Wrist Strap

8. User Tips

• XHDATA vs. SIHUADON D-808: There is no functional difference between these two products; only the branding/appearance may vary.
• Charging: The D-808 uses a Type-C charging port, confirming it is a newer version.
• Reception: For optimal reception, especially on MW/LW, try rotating the radio. For SW/FM/AIR, fully extend the whip antenna or use an external antenna.
• Squelch: If you are not receiving any signals, ensure the Squelch function is not set too high or is turned off, as it can filter out weaker signals.

9. Warranty and Support

For detailed information regarding product warranty, please refer to the official user manual PDF. A digital version of the user manual is available for download at User manual (PDF).

For further assistance or inquiries, you may contact XHDATA support:

• E-mail: xhdatacn@gmail.com
• Facebook: Xhdata Radios
• YouTube: Xhdata Radio
• TikTok: XHDATAradio
• Web: www.xhdata.com.cn