Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions COFDM AT Command
Download the Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions below if you need a PDF file.
Update Record:
| Version | Date | La description |
| 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 | 2016-10-24 2016-11-1 2016-12-26 2017-2-14 2017-2-28 2017-3-27 2017-4-19 2017-5-18 2017-9-12 2018-3-15 2019-6-25 2023-2-24 | Version initiale ATDR reply distinguishing module ATSE, ATGE add audio switch Add ATSP protocol Add ATST, ATGT protocol ATGE command add AESfor status acquisition Added ATGB protocol AV and HDMI output control Support for obtaining the current AV output standard Added ATSU, ATGUcommands Added ATOSD, ATSIP, ATGIP commands Added ATSAD, ATGAD commands |
Users may need to modify the configuration parameters of the module during the use of the COFDM modulator and demodulator module. In order to simplify the user’s operation, we design the parameter configuration into a few simple AT commands. The user only needs to use the specified AT command and pass the corresponding parameters to complete the parameter setting of the COFDM module.
Suitable Models
-
COFDM Modulateur Démodulateur Module Encodeur Décodeur HDMI CVBS Entrée AV AES 256 Diffusion RF FHD -
Module répéteur de relais COFDM pour émetteur et récepteur vidéo sans fil drone UAV Vcan1870
-
Émetteur et récepteur vidéo sans fil pour caméra, HDMI HD H265 264 encodeur 1W/2.5W PA 1080P60 Vcan1726
-
Modulateur d'encodeur SDI ou HDMI vers IP CVBS H.265 H.264, carte d'encodage pcba Ethernet RSTP UDP pour drone robotique UAV
Command Introduction
The AT command for configuring COFDM module parameters starts with “À” and ends with an underscore “_”. Each AT command has several or no parameters, and each AT command has a return value. Pour plus de détails, please refer to the introduction of the following commands.
Users can configure the parameters of the module through the configuration serial port (Niveau TTL, 3.3V) of the COFDM module. For detailed serial port configuration, refer to the figure below. Please use tools such as “Serial Port Debugging Assistant” to send AT commands to the COFDM module, pay attention to the use of texte, par exemple:
Command Classification
The AT commands for configuring COFDM module parameters are mainly divided into the following two categories:
| Query Commands | ATDR, ATGD, ATGE, ATGI , ATGR, ATGT, ATGB, ATGU, ATGIP |
| Setting Commands | ATSD, ATSG, ATSM, ATSE, ATSI, ATSO, ATSR, ATSP, ATST, ATSU,ATOSD, ATSIP |
From the perspective of whether to save after power-off, the setting commands can be divided into:
| Power-off Saving Commands | ATSD, ATSE, ATSI, ATSO, ATSR, ATSP, ATST, ATSU, ATSIP |
| Power-off Not Saving Commands | ATSG, ATSM, ATOSD |
According to the configuration transmitter or receiver, the classification is as follows:
| Sender Configuration Commands | ATDR, ATSD, ATGD, ATSG, ATSM, ATSE, ATGE, ATSI, ATGI, ATSO, ATSP, ATST, ATGT, ATSU, ATGU, ATOSD |
| Receiver Configuration Commands | ATDR, ATSR, ATGR, ATSP, ATST, ATGT, ATGB, ATSIP, ATGIP |
Command Details
Ping Command
| Format | ATDR_ |
| Paramètre | Non |
| Utiliser | for the integrated system to check whether the serial port is connected and identify the connected modules. |
| Valeur de retour | RCB returns the “device profile” string SUE1 returns “ATDRSUE1 OK” string SHD1 returns “ATDRSHD1 OK” string |
| Remarque | commande de requête |
Set Device Command
| Format | ATSD $(mimo), $(gi), $(code_rate), $ (constellation), $(fréquence(KHz)), $(bw(KHz)), $(tx1_gain), $(tx2_gain)_ Exemple: ATSD0,1,0,0,800000,8000,86.0,86.0_ |
| Paramètre | One Antenna/Dual antenna mimo: 0 mimo disable; 1 mimo enable Guard Interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1/4 Convolution Code Rate: 0 1/2; 1 2 /3; 2 3/4; 3 5/6; 4 7/8; Constellation: 0 QPSK; 1 QAM16; 2 QAM64; RCB Carrier Center Frequency(kHz) 200000~2700000(200MHz~2,7 GHz, 1Pas de KHz) RC900 Carrier center Frequency(kHz) 750000~930000(750MHz~930MHz, 1Pas de KHz) RCB Channel bandwidth bw(KHz) 2000~8000(2MHz~8MHz, 1Pas de KHz) RCB Channel bandwidth bw(KHz) 2000~8000 (2MHz~8MHz, 1Pas de KHz) Transmitting antenna 1 gain tx1_gain 0.0~89.75dB, 0.25dB stepping Transmitting antenna 2 gain tx2_gain 0.0~89.75dB, 0.25dB stepping |
| Valeur de retour | tel que:ATSD0,1,0,0,800000,8000,86.0,86.0_ SISO,GI: 1/16, CR:1/2, MOD: QPSK, fréquence:800000KHz,bw:8000KHz,tx1_gain:86.000000 tx2_gain:86.000000 D'ACCORD |
| Note | Définir la commande, enregistrer lors de la mise hors tension. Different Bandwidths, Intervalles de garde, Convolution code rates, Data rate calculation formulas corresponding to constellations Air interface rate Rate(MBps) = (Bande passante(MHz) * 8.0/7.0) / (1+GI) * 1512/2048*log2(constellation point) * code_rate * 188/204. Taking 8MHz bandwidth as an example, different guard intervals, convolution code rates, data rates corresponding to constellations and required receiving signal-to-noise ratios  |
Set Gain Command
| Format | ATSG$( tx1_gain),$( tx1_gain)_ Exemple: ATSG85.0,85.0_ |
| Paramètre | tx1_gain: Émetteur 1 gagner tx2_gain: Émetteur 2 gagner |
| Utiliser | To dynamically adjust the output power. If the signal SNR/RSSI of the receiver is high, the output power can be reduced through the remote control link. When the SNR/RSSI of the end signal is low, increase the output power (émetteur) |
| Valeur de retour, | Exemple: ATSG85.0,85.0_set gain 85.000000 85.000000 D'ACCORD |
| Remarque | commande de réglage, power off will not save. |
Set Modulation Mode command
| Format | ATSM$(gi), $(code_rate), $(constellation)_ Exemple: ATSM1,1,2_ |
| Paramètre | Gard interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1 /4; Convolution code rate: 0 1/2; 1 2/3; 2 3/4; 3 5/6; 4 7/8; Constellation: 0 QPSK; 1 QAM16; 2 QAM64 |
| Utiliser | Dynamically adjust the air interface rate, the air interface rate can be increased when the distance is short, and the air interface rate can be reduced when the distance is long (émetteur) |
| Valeur de retour | Exemple:ATSM1,1,2_GI:1/16, CR:2/3, MOD: QAM64, D'ACCORD |
| Remarque | commande de réglage, power off will not save. |
Get Device Status Command
| Format | ATGD_ |
| Paramètre | Non |
| Utiliser | query the current number of transmit antennas, intervalle de garde, convolution code rate, number of constellations, transmit frequency, bandwidth, gain parameters (émetteur) |
| Valeur de retour | Exemple: ATGD_ SISO, GI:1 /16, CR: 1/2, MOD: QPSK, fréquence: 800000KHz, bw: 8000KHz, tx1_gain: 86.000000 tx2_gain: 86.000000 D'ACCORD |
| Remarque | commande de requête |
Set Encoder Command
| Format | ATSE$(llc),$(rt),$(débit) ,$(gop),$(audio)_ Exemple: ATSE0,0,0.0,0,0_ |
| Paramètre | 1. Enhanced data reliability option llc: 0 disable; 1 activer (requires the receiving end to enable this option at the same time, use in pairs, because more redundant data is added to enhance reliability, the video bit rate of the transmitting end should be set when this option is turned off half of) 2. Real-time priority/quality priority rt: 0 image quality priority; 1 real-time priority; 3. Débit: 0 let system decide; >0 specify bitrate(float) 4. I frame interval GOP: 0 let system decide; >0 specify GOP 5. Audio encoding option audio: 0 disable; 1 activer |
| Utiliser | Used to set encoding parameters (Émetteur) |
| Valeur de retour | Exemple:ATSE0, 0,0.0,0,0_ MODE:0,RT:0,débit: 0.0Mbit/s,gop:0,audio:0,D'ACCORD |
| Remarque | commande de réglage, save when power is off. |
Get Encoder Command
| Format | ATGE_ |
| Paramètre | Non |
| Utiliser | querying encoding parameters (sending end) |
| Valeur de retour | Exemple:ATGE_MODE:0, RT:0,débit:4.0Mbit/s,gop:10,audio:0,aes:0, D'ACCORD |
| Remarque | Query command AES means the current encryption status: 0 disable; 1 activer |
Get Input Command
| Format | ATGI_ |
| Paramètre | Non |
| Utiliser | query the current camera input parameters (émetteur) |
| Valeur de retour | Exemple:ATGI_input_size: 1080p, input_rate: 60fps, sensor_type: hdmi,D'ACCORD |
| Remarque | commande de requête |
Set Input Command
| Format | ATSI$(input_size),$(input_rate)_ Exemple: ATSI1080,25_ |
| Paramètre | 1. Input resolution input_size: 0 laissez le système détecter; >0 specify input size 2. Input frame rate input_rate: 0 laissez le système détecter; > 0 specify input fps |
| Utiliser | To specify the input resolution and frame rate to meet some special signal sources, or some special application needs (émetteur) |
| Valeur de retour | Exemple: ATSI1080,25_ Input_size:1080p,input_rate: 25fps, D'ACCORD |
| Remarques | After the user specifies the input resolution and frame rate through this command, the system will no longer detect the signal source (use with caution). The user can restore the default through the following command: ATSI0,0_Set the command and save it after power-off. |
Set Output Command
| Format | ATSO$(output_size),$(output_rate)_ Exemple: ATSO720,30_ |
| Paramètre | 1. Émetteur: encoding output resolution output_size: 0 equal to input_size; >0 specify output size 2. Récepteur: HDMI output resolution (720, 1080) 3. Émetteur: encoding output frame rate output_rate: 0 equal to input_rate; >0 specify output_rate (fps) 4. Récepteur: HDMI output frame rate 720p supports frame rate (50, 60); 1080p supports frame rate (24, 25, 30, 50, 60) |
| Utiliser | 1. Émetteur: Used to specify the encoding output resolution and frame rate to meet the requirements of certain applications for zooming and frame reduction 2. Récepteur: used to configure the resolution and frame rate of HDMI output |
| Valeur de retour | Exemple: ATSO720,30_ output_size: 720p, output_rate: 30fps, D'ACCORD |
| Remarques | 1. For HDMI input only, this command is invalid for AV input 2. Output_size <= input_size; output_rate<=input_rate 3. Set the command and save it after the power is off. |
Commande Définir les sources d’entrée (commutateur HDMI / Entrée CVBS)
| Format | ATSU$(vin),$(aïn)_ Exemple: ATSU0,1 _ |
| Paramètre | 1. Sélection d'entrée vidéo VIN: 0 laissez le système détecter; 1 forcer la saisie CVBS; 2 forcer l'entrée HDMI/SDI 2. Sélection de l'entrée audio AIN: 0 laissez le système détecter; 1 forcer l'entrée analogique |
| Utiliser | Utilisé pour répondre aux exigences spécifiques des applications (Exemple: Vidéo d'entrée HDMI/SDI, Audio d'entrée micro) |
| Valeur de retour | Exemple: ATSU0,1_ ATSU0,1 OK |
| Remarque | commande de réglage, sauvegarde hors tension. |
Get User Command
| Format | ATGU _ Exemple: ATGU_ |
| Paramètre | Non |
| Utiliser | To query user-specific configuration |
| Valeur de retour | Exemple: ATGU_ ATGU0,1 OK |
| Remarque | commande de requête return parameter description please refer to the ATSU command |
Set Receiver Command
| Format | ATSR $(fréquence), $(bw ), $(llc), $(cvbs)_ Exemple: ATSR320000,6000,0,0_ |
| Paramètre | 1. DR2C carrier frequency freq(KHz) 200000~860000(200MHz ~ 860 MHz, 1Pas de KHz) 2. DR900 carrier center frequency freq(KHz) 200000~1600000(200MHz~1.6GHz, 1Pas de KHz) 3. DR2C channel bandwidth bw(KHz) 2000~8000(2MHz~8MHz, 1Pas de KHz) 4. DR900 channel bandwidth bw(KHz) 3200~8000(3.2MHz~8MHz, 1Pas de KHz) 5. Enhanced data reliability option llc: 0 disable; 1 activer (it is required that the transmitter should also enable this option at the same time, and use it in pairs. Since more redundant data is added to enhance reliability, the video bit rate of the transmitter should be set to when this option is turned off half of) 6. AV output system cvbs: 0 pal; 1 ntsc |
| Utiliser | To set the receiver parameter |
| Valeur de retour | exemple: ATSR320000,6000,0,0_ ATSR320000,6000,0,0 OK |
| Remarque | commande de réglage, save when power is off. |
Get Receiver Command
| Format | ATGR_ |
| Paramètre | Non |
| ATGR_ | the receiving end parameter |
| Valeur de retour | Exemple: ATGR_ ATGR320000,6000,0,aes:0,cvbs:0 D'ACCORD |
| Remarque | 1. Query command 2. Aes parameter indicates the current encryption status: 0 disable;1 activer 3. CVBS parameter Indicates the current AV output standard: 0 pal;1 ntsc |
Get Bit Error Rate Command
| Format | ATGB_ |
| Paramètre | Non |
| Utiliser | querying the bit error rate and signal strength of the dual antennas at the receiving end |
| Valeur de retour | Exemple: ATGB_ ATGB ber1:0.00% ber2:0.00% RSSI1 :54 RSSI2:53 Lock1:1 Lock2:1 D'ACCORD |
| Remarques | 1. Query commands 2. Ber1 and ber2 respectively indicate the bit error rate of each antenna, allant de 0.0% to 100.0% 3. RSSI1 and RSSI2 respectively indicate the signal strength of each antenna, allant de 0 to 100 4. Lock1 and Lock2 respectively indicate the signal locking status of each antenna (1 Represents signal lock) |
Set Password Command
| Format | ATSP$(mot de passe), $(mot de passe)_ Exemple: ATSP123456, 123456_ |
| Paramètre | Mot de passe de la clé AES: 6-digit password (ASCII) Mot de passe de la clé AES: 6-digit password (ASCII) (repeat it for confirmation) |
| Utiliser | Utilisé pour définir la clé AES de l'émetteur-récepteur (émetteur et récepteur) |
| Valeur de retour | Exemple: ATSP123456_ ATSP123456 OK |
| Remarque | 1. Quand le mot de passe est tout 0, AES encryption is turned off. 2. Set the command and save it after powering it off. |
Set Data Transfer Command
| Format | ATST$(débit en bauds), $( parity)_ Exemple: ATST115200,0_ |
| Paramètre | 1. Baud rate baud rate: 1200、2400、4800、9600、19200、38400、57600、115200 2. Check Code: 0: Aucun; 1: Odd; 2: Even |
| Utiliser | Used to set the baud rate and parity bit of the serial port for data transparent transmission |
| Valeur de retour | Exemple: ATST115200,0_ ATST115200,0 OK |
| Remarques | Définir la commande |
Get Data Transfer Command
| Format | ATGT_ |
| Paramètre | Non |
| Utiliser | Used to query the baud rate and check code |
| Valeur de retour | Exemple: ATGT_ ATGT115200,0 OK |
| Remarques | Query command |
Set IP Address Command
| Format | ATSIP$(ip), $(ip)_ Exemple: ATSIP192.168.1.215,192.168.1.215_ |
| Paramètres | Local IP address Local IP address (répéter pour confirmer) |
| Utiliser | Used to set the receiver IP address |
| Valeur de retour | Exemple: ATSIP_192.168.1 .215,192.168.1.215_ ATSIP192.168.1.215 OK |
| Remarques | 1. After setting the IP address, the receiving end needs to be restarted to take effect. 2. Set the command and save it after powering it off. |
Get IP Address Command
| Format | ATGIP_ Exemple: ATGIP_ |
| Paramètre | Non |
| Utiliser | pour interroger l'adresse IP actuelle du destinataire |
| Valeur de retour | Exemple: ATGIP_ ATGIP192.168.0.215 OK |
| Remarque | commande de requête |
OSD Overlay Protocol
| Format | ATOSD$(idx), $(x), $(oui), $(str)_ Exemple:ATOSD0,40,20,height: 100m_ |
| Paramètre | 1. IDX index: 0~7 (supports OSD overlay for 8 areas) 2. X-coordinate: 0~1919 3. Y coordinate: 0~1079 4. str: the string to be displayed at the corresponding coordinates (the space symbol is used to clear the display) |
| Utiliser | on the video screen.OSD information |
| Valeur de retour | Non |
| Remarques | 1. L'utilisateur spécifie les coordonnées x et y de l'affichage OSD selon le maximum 1920×1080 pixels, et le système corrigera les coordonnées en fonction de la situation d'affichage réelle. 2. The ‘_’ character cannot be contained in the str parameter |
Set Gain To Adjust
| Format | ATSAD$(fréquence),$(ajuster) _ Exemple:ATSAD700000,2.5_ |
| Paramètre | wireless central working frequency： Fréquence(KHz) 200000~2700000(200MHz~2,7 GHz, step: 1KHz) Adjust the value(dB): ATSD cmd will subtract this value to set the wireless gain |
| Fonction | Specify and adjust the value for the wireless gain setting using by ATSD cmd |
| Retour | Exemple: ATSAD700000,2.5_ freq:700000,ajuster:2.50 D'ACCORD |
| Commentaires | Setting command is still valid when stopping power or resetting. |
Get Gain To Adjust
| Format | ATGAD[$(fréquence)]_ Exemple:ATGAD700000_ |
| Paramètre | wireless central working frequency： Fréquence(KHz) 200000~2700000(200MHz~2,7 GHz, step: 1KHz) When no parameter provides, it will list all the freq that have adjusted value. |
| Fonction | Inquiry adjust the value for wireless gain setting using ATSD cmd |
| Retour | Exemple: ATGAD700000_ freq:700000,ajuster:2.50 OK ATGAD_ freq:700000 750000 D'ACCORD |
| Commentaires | Inquiry command. |
Serial Port Utility software download
https://www.alithon.com/downloads
FAQ
1. How can I return to the No Password setting with 000000 indications after the change?
Reset the password to 000000 (one must not be missing) through the Parameter Configuration Panel Board.
or set it through le ATSP_command
2. I see that Gain is the output power of the transmitter. Please tell me the range of settings of this parameter. All setting level (Gagner) good for linear output operation? Or do you suggest some limited range for better linear operation?
The Gain of the COFDM configuration is the internal Gain, not the actual output power of the transmitter. The internal gain range is 0~89.75dB and the linear output:
1. At around 300~500MHz, the Gain is set to 89.75, and the actual output power of the transmitter module is about -5dBm.
2. At around 1000~1500MHz, the Gain is set to 89.75, and the actual output power of the transmitter module is about -6dBm to -10dBm.
3. I tried to set – B bandwidth (kHz) and E bit rate (Mbit/s). When I set E, the new value does not apply. Donc. the E setting is only for monitoring of available bitrate? if I wish to change the E (Débit) I have to change only B (bandwidth)? Am I right?
It is not recommended to modify the video bit rate ‘E’ directly, because if the output video bit rate is greater than the wireless air interface rate, the system will not work normally.
Par défaut, the internal video bit rate ‘E’ will be set to 0 for automatic. Customers only need to modify ‘B’ to modify the wireless parameters, and the video bit rate will automatically adapt.
You can also adjust the wireless air interface rate by modifying GI and CR.
For more details on the Encoder Modulator Decoder Demodulator Module, please send an inquiry to us.
COFDM Modulateur Démodulateur Module Encodeur Décodeur HDMI CVBS Entrée AV AES 256 Diffusion RF FHD
$1,450.00
COFDM Modulateur Démodulateur Module Encodeur Décodeur HDMI CVBS Entrée AV AES 256 Diffusion RF FHD
Table des matières
Another side view
COFDM Encoder module, CVBS / Entrée HDMI, IP output
For More details about the COFDM encoder board, please visit here
COFDM Encoder module Advantage:
- Ultra-low latency H.265/H.264 audio and video encoding maximum support 1080P@60 real-time video capture and encoding
- HDMI or AV audio and video input, after encoding, the Ethernet port output or Output to wireless module, video encoding bit rate can be dynamically configured
- Prise en charge de l'entrée audio et de la sortie de décodage audio
- Support two videos (HDMI+OFF) simultaneous input encoding (option, the default is HDMI or AV encoding, pick one from two input sourcing). )
- Interface utilisateur Web ou serial port UART AT command for configuration management
COFDM transmitter module
COFDM transmitter module
COFDM modulator-demodulator datasheet download
COFDM demodulator Vcan1776RX-H264 datasheet
The last version of the TX RX board
Émission: V6.5.6p
RX: 4.1.2p
COFDM Wireless Video encoder modulator board
SDI+AHD+CVBS Video Encoder and H264 H265 decoder
Some clients also need SDI AHD CVBS video encoder modulator transmitter video decoder demodulator receiver HDMI output. We also have another model Vcan1776-SDI+AHD+CVBS supports these functions.
Quelle carte de décodeur vidéo prend en charge H264 H265 et une latence ultra faible?
Quelle carte de décodeur vidéo prend en charge H264 H265 et une latence ultra faible?
La carte décodeur bleue de gauche prend en charge le décodage H265 et H264 mais ne prend pas en charge le décodage à faible latence.. (Jeu de puces Samsung)
Le tableau noir de droite prend en charge le décodage H264 mais prend en charge le décodage H264 à faible latence. (SalutSilicon)
FAQ
Question: What’s the precise RF power output at 1400 MHz? Can I adjust the output power using software?
Répondre: The maximum RF power at 1400MHz is about -9 to -12 dBm, the exact RF power can be set via carte de configuration des paramètres or via uart with AT command.
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| Video Input | HDMI+CVBS, IDS+AHD( ou CVBS) |
|---|
1 examen pour COFDM Modulateur Démodulateur Module Encodeur Décodeur HDMI CVBS Entrée AV AES 256 Diffusion RF FHD
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iVcan.com –
This COFDM module is the professional-grade backbone our live production team desperately needed! We replaced a bulky $10K rig with this compact unit, streaming zero-latency 1080p video via HDMI/CVBS from drones and rally cars across 3km of urban chaos. The AES-256 encryption kept feeds secure during a high-profile emergency event, while the built-in bit-error correction maintained crystal clarity through concrete structures and rain. L'installation a pris quelques minutes: just linked cameras to AV/HDMI inputs, set RF parameters, and hit stream. For broadcasters, first responders, or industrial inspections needing tamper-proof, long-range HD video with military-grade security, this module delivers flawless performance at a fraction of traditional costs!