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Post by Wesley on Aug 19, 2016 16:28:53 GMT -7
What are the recommended settings for the RFD900? Everything from the Air Speed to LBT Rssi? We were toying around with the best settings and lost what they were up at the workshop.
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Post by David MSGC on Sept 7, 2016 13:44:16 GMT -7
The flash drives provided at the workshop and on the desktop of the ground station computers there is a file named RFD_Resources that has a screenshot of suggested settings. You can experiment to see what works best for you. The min/max frequency needs to be at least 2 Mhz apart, the netid needs to be the same on each pair of radios, all the rest can be experimented with.  |
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Post by davidaz on Apr 17, 2017 13:32:11 GMT -7
I know that the RFD system requires a query from a ground station when an image is to be received. The ground station in receive mode should be able to receive any image that is being transmitted from any balloon or so I think. This is a "receive only ground station"...yagi plus an RFD radio and computer running the appropriate software but without the ability to transmit a query to the balloon for an image. The only requirement is that the ground station and the balloon RFD radios share a common setting...my question is can my receive only ground station receive still images from any balloon that is transmitting the image based on a query from another ground station...provided that the settings are identical for each radio? Thanks
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Post by David MSGC on Apr 17, 2017 18:05:04 GMT -7
If all settings, particularly the net id and min/max frequency are the same, any radio with the same settings will be able to receive data from a radio with the same settings. Also the payload side radio will not listen to a radio with different settings, so if you have a payload side radio with the same settings as two ground side radios the two ground side radios can request and receive an image from the payload. But only one ground side program will be ready to receive a picture. If a request for an image is sent, the only ground station that can receive the image will be the one that sent the request, even if another ground side radio has the same settings. This is because the program on the ground side radio that did not send the request is not expecting to receive an image, it won't be in the right spot in the program, so the software is not ready to receive a picture. There is a handshake and sync that takes place before a picture is sent.
The radios are considered "transparent," what is received on the rx pin is repeated on the tx pin, you can think of it as a wireless serial connection.
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Post by Prof I on Apr 18, 2017 14:27:31 GMT -7
If I use the RFD Ground Station program when my ground side radio is turned on and the program started it will try to connect to the payload side radio. If the contact is successful the GUI will open and I will then be ready to "request image". When I click on that button the query will be sent to the payload radio and an image will then be sent to my ground side radio. Is that correct? I have no way of testing this since I do not have access to a payload radio. I tested the program with my ground side radio and it opens properly and is waiting for acknowledgement from the payload side radio, which of course doesn't come.
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Post by David MSGC on Apr 18, 2017 16:59:53 GMT -7
If I use the RFD Ground Station program when my ground side radio is turned on and the program started it will try to connect to the payload side radio. If the contact is successful the GUI will open and I will then be ready to "request image". When I click on that button the query will be sent to the payload radio and an image will then be sent to my ground side radio. Is that correct? I have no way of testing this since I do not have access to a payload radio. I tested the program with my ground side radio and it opens properly and is waiting for acknowledgement from the payload side radio, which of course doesn't come. Yes, you have the process correct. |
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