לקוח צריך DVB-T עם כוונון VHF-UHF לפי תדר כניסה בשלב של 1MHz. Here is his demand.
I am looking for a DVB-T receiver with diversity inputs that can be tuned by inputting frequency and not by TV channel number.
I am trying to build a system to receive a transmission in 2.0-2.63GHz using LNB’s with 1838MHz LO – so I need to be able to tune VHF-UHF by inputting a frequency in 1MHz steps. So tuning 2610MHz I would need to enter 2610-1838=772MHz and for 2256MHzI would enter 2256-1838=418MHz.
המלצנו על הדגם שלהלן: Vcan1776-HDMI
This is how COFDM DVB-T receivers meet customer requirements. Our tuning step is 1KHz (כמובן, you can also tune in 1Mhz units). We have two ways to change the frequency.
תוכן העניינים
Change DVB-T Receiver frequency via AT Command serial port
| פוּרמָט | atsr $(תדירות), $(BW ), $(LLC), $(CVBS)_ דוגמא: ATSR320000,6000,0,0_ |
| פָּרָמֶטֶר | 1. תדר מנשא DR2C FREQ(KHz) 200000~ 860000(200860MHz MHz ~, 1צעד KHz) 2. DR900 Carrier Center Frequency Freq(KHz) 200000~ 1600000(200MHz ~ 1.6GHz, 1צעד KHz) 3. רוחב פס DR2C בערוץ BW(KHz) 2000~ 8000(2MHz~8MHz, 1צעד KHz) 4. רוחב הפס של DR900 בערוץ BW(KHz) 3200~ 8000(3.2MHz~8MHz, 1צעד KHz) 5. אפשרות אמינות נתונים משופרת LLC: 0 השבתת; 1 לְאַפשֵׁר (נדרש שהמשדר יאפשר גם אפשרות זו בו זמנית, ולהשתמש בו בזוגות. מכיוון שמתווספים נתונים מיותרים יותר כדי לשפר את האמינות, יש להגדיר את קצב סיב הווידיאו של המשדר כאשר אפשרות זו מכבה מחצית של) 6. מערכת פלט AV CVBS: 0 יָדִיד; 1 ntsc |
| להשתמש | להגדרת פרמטר המקלט |
| ערך החזרה | דוּגמָה: ATSR320000,6000,0,0_ ATSR320000,6000,0,0 אישור |
| הֶעָרָה | פקודת הגדרה, חסוך כאשר הכוח כבוי. |
Change DVB-T Frequency by a parameter configuration tool
| COFDM RX vxx | |
| S1: אַנטֶנָה 1 עוצמת אות (0~ 100%) | S2: אַנטֶנָה 2 עוצמת אות (0~ 100%) |
| F: תדירות (KHz) | |
| B: רוחב פס (KHz) | |
| P: 6-סיסמת ספרות (עם הסיסמה המוצגת: ——, ללא סיסמה מוצגת: 000000) | |
The decoder failed to demodulate the signal from the LNB. I tested QPSK, 16QAM, ו- 64QAM, using guard intervals of 1/32 ו 1/16. I also tested three different frequencies.
Please connect the LCD reference board first and take pictures for us to see if the wireless signal is locked? Make sure the signal is locked.
The customer also mentioned that they need a device, 2.0-2.63GHz using LNB’s with 1838MHz LO, to reduce the input frequency of 2000～2630Mhz, reduce 1838Mhz, and output 162Mhz~792Mhz. We can also provide such a device. Please refer to our ממיר תדרים למטה.
Most DVB-T receivers on the market support automatic channel search. לדוגמה, they have bandwidths of 8M or 6M, and there are also 7M for Australia. In order to save waiting time for searching channels, they will only search channels on designated channel numbers or corresponding frequencies.
Even though there is a manual channel search function, it can only select the corresponding channel from the drop-down channel number. It does not allow you to manually enter the frequency to search for channels. לדוגמה, if I want to search for 473Mhz, it does not have an option for you to enter 473 through the remote control to search for this specified frequency.
Customers with this need, such as some professional application scenarios, cannot meet or realize this function with ordinary TV boxes. Our professional, customizable COFDM receiver 1776 can search channels in 1M and 1K steps.
There are two ways to input the specified frequency. The first is to send a command through the serial port, and the second is to use additional parameter configuration tools to adjust parameters such as frequency bandwidth.
Another model supports to enter the frequency via manual search
שאל שאלה
תודה רבה ששלחת את התשובה! ✨