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Thank you for replying..
I have tried all but the problem is still the same.
SIM900B replies properly for all the commands but for
AT+CMSS=1 it gives ERROR as output
My program sequence
AT+CPIN?
AT+COPS?
AT+CMGF=1
AT+CMSS=1 (as the msg to be sent is saved in this particular location)
With SIM 300 the AT commands works fine and msg is sent but when the same commands are used for SIM900B
it sends back "ERROR" :???:
Please let me know what could be the problem
I too have the same problem
My program sequence
AT+CPIN?
AT+COPS?
AT+CMGF=1
AT+CMSS=1 (as the msg to be sent is saved in this particular location)
With SIM 300 the AT commands works fine and msg is sent but when the same commands are used for SIM900B
it sends back "ERROR"
Please let me know...
Hi everyone,
I am working on an application where Atmega8L is interfaced to SIM300 and the purpose of the application is to send SMS on trigger.
After the communication setting is done, i am waiting for a trigger to come and then am sending "AT+CPBR=7\r\n" which means the required no is at 7th...
In the application where there are RF components with DC bias, do we need to keep seperate RF ground and DC bias ground??
If yes then what is the specific reason for that?
Where the RF gnd should be and where should be DC bias gnd?
Ground pouring on the top layer should be RF gnd or DC gnd?
I...
Hello
I want to do RF front end PCB layout in ADS.
I want to make QFN package. Can anyone provide me the package for LP5 or LP4 QFN in ADS.
The In-built packages are having leads with bond layer and solder mask.
Is it necessary to specify the bond layer n solder mask on leads. If yes then...
Please provide the steps to export the Cadence PCB (.iff) file format from ADS (Advanced Design System).
Also provide the steps required while importing the same in Allegro.
It would be helpful if someone can also provide the example for each steps required to be followed.
VCO stability
Can anyone pl tell me if frequency jitter of VCO will affect signal detection.
In Radar application, will it affect low doppler detection??
Please guide me to get a good start for it............It would be better if u know some document which will help me for the start.......such as impedance consideration for the bending of the track , grounding and power plane consideartion....
Thank u for d reply :D
I know that topic is too large......but have to start from somewhere.....
Pozar will give general theory about the microstrip and other stuff but will not help me in understanding the basic consideration and start for the RF PCB design.
I am a newbie in RF PCB (LAYOUT) design field.
I only know about the impedance calculation of the straight micrstrip line.
Please help me about how to start learning the RF PCB design, consideration of bendings, effect of impedance by bending of track, how to design layout when high freq and...
rogers fr4
Thanx Sir for providing the relevant information about the material........I have just started in this field......it will be helpful if u could also provide some link where I can learn designing of RF PCB layout from scratch.
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