I have some general questions regarding ADAR100 EVALZ:
1. There is a J1 and J2 connector on the board. But there is no description about this connection in the data sheet...
In the data sheet there is only J5 described....and this line is not on the board..
2. Is the Technology of ADAR a CW or pulsed signal?
3. Is it possible to use TX/RX at the same time? Or do you have to use only TX for example and terminate the RX channels? In this case I can use a horn antenna for a RX...
I would be very glad, if you can answer these questions.
Thanks in Advance...
Answers to your questions:
1. Evaluation board schematic is in the User Guide, available on the product webpage - also attached below. J1 and J2 are SMA connectors for the calibration path. Do you mean P1 and P2? Those contain various GPIO and SPI connections.
2. I don't know if I understand the question. Do you mean can you use a pulse or CW signal with the ADAR1000? If so, you can use either, just as long as you do not go beyond the absolute maximum ratings in the datasheet.
3. You cannot be in Tx mode and Rx mode at the same time; you can either be in Tx mode or Rx mode - you have to switch back and forth. Unused channels should be loaded with 50 Ohms.
thanks very much, you´ve answered all my questions.
Regarding the first question: No I don´t mean P1 and P2. I mean J1 and J2...could you give an example what you mean with calibration path? I thought only the Channel RF_IO is for the network analyzer....
and how do you use CW or pulsed signal? I mean how can you control it...
The RF lines on the ADAR1000 are: RX1, RX2, RX3, RX4, TX1, TX2, TX3, TX4 and RF_IO, all of which can be connected to a network analyzer. RF_IO is just the common port for the Rx and Tx paths. In other words, RF_IO serves at the input for the TX paths while in Tx mode, and the output for the RX paths while in Rx mode.
The calibration path from J1 to J2 is the same design as any RF_IO to any Rx input OR RF_IO to any Tx output. J1 to J2 calibration path is matched in length so you can calibrate out the insertion loss and phase of the RF lines.