NXT Digital CHA045170A

Questions and Answers

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Christopher WilkinsAug 10, 2025
Why is my NXT Digital Set-top box remote control not working?
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  Catherine HughesAug 10, 2025
  There are a couple of reasons why your NXT Digital Set-top box remote might not be working. First, the batteries may be discharged, so try replacing them with new ones. Second, ensure that the remote control is pointing towards the front of the Set Top Box and is within a 2-meter distance.
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Brett RasmussenAug 14, 2025
What to do if no sound is coming from NXT Digital Set-top box?
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  Dominique WileyAug 15, 2025
  If you're not getting any sound from your NXT Digital Set-top box, here are a few things to check: 1. Make sure the HDMI cable used to connect to the apparatus is connected or replace it. 2. Verify that the sound is not muted on either the Set Top Box or the television. 3. If the sound track is incorrect, use the remote control to change the sound track to the correct language.
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alexanderherringAug 20, 2025
How to fix NXT Digital CHA045170A when no picture is coming?
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  Steve GilbertAug 20, 2025
  If you are not getting a picture on your NXT Digital Set-top box, it could be due to a couple of reasons. First, ensure that the STB power is connected using the power adapter that came with the Set Top Box. If the issue persists, the STB or power adapter may be faulty, and you should visit an authorized service center for repairs.
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Brenda GibbsAug 25, 2025
What to do if the NXT Digital Set-top box screen shows 'No Signal'?
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  Amanda McculloughAug 26, 2025
  If your NXT Digital Set-top box screen displays 'No Signal', it could be due to the following reasons: * The video RF cable may not be connected properly. Ensure the RF cable is securely connected at the back of the Set Top Box. * The settings may not be correct. Request your operator to check your settings.
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Christopher StewartAug 30, 2025
Why are images frozen or mosaic on my NXT Digital Set-top box?
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  Elizabeth MooreAug 30, 2025
  Frozen or mosaic images on your NXT Digital Set-top box are likely caused by a weak signal. To resolve this, check that the RF cables are not bent or damaged and ensure they are properly connected to the connector.
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Jordan WattsSep 4, 2025
How to resolve audio but no video on NXT Digital Set-top box?
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  Sabrina LevySep 4, 2025
  If you're getting audio but no video on your NXT Digital Set-top box, it could be for one of two reasons. The HDMI cable may be faulty, so try replacing it. Alternatively, the channel may be a radio channel, which doesn't have video. Press the 'Radio channel' key on the remote control.

This document describes the NXT DIGITAL Digital Cable Receiver, model CHA045170A. It is a professional-grade set-top box (STB) designed for receiving digital cable television signals. The device is manufactured in India and complies with IS 13252(Part 1)/IEC60950-1 safety standards.

Function Description

The NXT DIGITAL Digital Cable Receiver is primarily used to receive and decode digital cable television signals, allowing users to watch various channels on their television sets. It supports both standard definition (SD) and high definition (HD) content, with a maximum resolution of up to 1080p. The device also includes features for recording television programs onto an external USB hard drive, managing favorite channels, and accessing an Electronic Program Guide (EPG).

Important Technical Specifications

Tuner:

Frequency Range: 110MHz to 858MHz
Input Impedance: 75 ohms unbalanced
Signal Input Level: 40-85dBuV
Symbol Rate: 6875

Demodulation:

Demodulator: 16/32/64/128/256QAM

Connections:

RF IN: F connector (for receiving television signal from cable)
AV: RCA (CVBS+L/R) (for connecting to television via AV cable)
HDTV: HDMI (for connecting to television via HDMI cable)
DC IN 12V: Used to connect a 12V DC adapter (power input)
USB: Connects to an external USB 2.0 device (for recording and PVR management)

Power:

Input: 100-240V ~ 50/60Hz

Display:

Resolution: Up to 1080p
Aspect Rate: 4:3, 16:9

Decoding:

Video: MPEG4/H.264, MPEG2, MPEG1
Audio: MPEG1, MPEG2 (Layer I/II), GAAC

Others:

Sound Mode: Right, Left, Stereo

Usage Features

Panel Controls: The top panel of the STB includes basic controls:

Power on/off: Toggles the device power.
Channel down: Navigates to the previous channel.
Channel up: Navigates to the next channel.

Remote Control: The remote control offers extensive functionality:

Power ON / Standby: Turns the device on or off.
Programme Recording Key (REC): Initiates recording of the current program.
Program Rewind / Forward (REW, FWD): Controls playback during PVR.
Help Key (HELP): Accesses system information (once) or channel information (twice).
Play/Pause in PVR (PLAY, STOP): Controls playback of recorded content.
Info Key / Program Synopsis (INFO): Displays program details.
Audio Language (LANG): Changes the audio language.
Function Keys (Red, Yellow, Blue): Red key manages recording schedule, Yellow key views messages/BMail, Blue key accesses USB/PVR manager.
Electronic Programme Guide (EPG): Displays the program schedule.
Menu Key (MENU): Accesses the main menu.
OK / Select (OK): Confirms selections.
Navigation Keys (Up, Down, Left, Right): Navigates through menus and options.
Back Key (BACK): Returns to the previous screen.
Exit Key (EXIT): Exits current menu or function.
NXT Digital Services (VAS): Accesses additional services.
Volume Up/Down (VOL +, -): Adjusts volume.
Channel Up/Down (CH +, -): Changes channels.
Favorites Key (FAV): Accesses the list of favorite channels.
Number & Alphabet Keys (0-9): Enters channel numbers or text.
Radio Channel (♫): Switches to radio channels.
Audio Mute (MUTE): Mutes or unmutes audio.

Installation and Setup:

First-time Installation: Requires connecting the STB to the television using either an HDMI cable (for HDTV) or AV cables (for AV input). The cable signal is connected to the RF IN port, and power is supplied via the 12V DC adapter.
Auto Search: After initial connection, users can perform an "Auto Search" from the "Search" menu to scan and find available channels.
Remote Control Programming: The remote control can be programmed to learn functions from another remote by entering a learning mode (holding SET key), pressing the learning key, aiming the remotes, and pressing the desired button to be learned.

Channel Management:

Saving Favorites: Users can access the "Program Edit" menu, select "Favorite," choose a favorite group, and then select channels to add or remove them from that group. Changes must be confirmed by pressing "OK" to save.

Recording Features:

Recording on USB Hard Drive: The device supports recording programs to an external USB 2.0 device.
- Instant Recording: Pressing the "REC" key on the remote during live TV initiates immediate recording.
- Scheduled Recording: Users can schedule recordings by navigating to "Menu" -> "Option" -> "Schedule." Within the schedule menu, users can add new events, specifying channel type, number, name, start/end date/time, repeat options, and mode (record).
- EPG Recording: The "EPG" (Electronic Program Guide) allows users to select a program and set it to record or set a reminder using the Yellow color button on the remote.
Stopping Recording: An ongoing recording can be stopped by pressing the "STOP" key on the remote.
Viewing Recorded Channels: Recorded content can be accessed via "Main menu" -> "USB" -> "PVR."

Maintenance Features

Safety Instructions: The manual emphasizes several safety instructions:

Read and keep all instructions and heed all warnings.
Do not use near water or expose to liquids, rain, or moisture.
Clean only with a dry cloth.
Ensure proper ventilation; do not block openings or install near heat sources.
Protect the power cord from damage.
Use only manufacturer-specified attachments/accessories.
Unplug during lightning storms or long periods of disuse.
Refer all servicing to qualified personnel.
Do not open the apparatus due to risk of electric shock.
Batteries should not be exposed to excessive heat.
Dispose of batteries environmentally.
Apparatus should be used in moderate climate conditions.

Troubleshooting Guide: The manual provides a troubleshooting section for common issues:

No picture: Check power connection, STB/power adapter functionality, and RF cable connection.
"No Signal" message: Check RF cable connection and settings.
No sound: Check audio cable connection, STB/television mute status, and sound track language.
Audio only, no video: Check HDMI cable, or confirm if it's a radio channel.
Remote control not working: Replace batteries, ensure line of sight to STB, and check distance.
Frozen or mosaic images: Likely due to weak signal; check RF cable condition and connection.

Environmental Considerations: The device bears a marking indicating it should not be disposed of with other household waste in India. Users are encouraged to recycle the apparatus responsibly through return and collection systems to promote sustainable reuse of materials and prevent harm to the environment.