RFspace NetSDR Manuel d'utilisateur télécharger pdf (Page 31)

5. Examples of Basic NetSDR Operations

5.1. 24bit I/Q Continuous Capture Setup Example

The following minimal steps are required to start the NetSDR capturing data with a 100KHz sample rate and tuned to

a center frequency of 20.0MHz in single channel mode.

The steps 1 through 4 can be sent in any order as long as they occur prior to the start command step 5.

They also only need to be sent once before the first Start command.

Most commands can be changed while the unit is running such as frequency filters, RF gain etc. Those affecting

data format or sample rate should be issued while the unit is idle.

1-Set DDC Output sample rate to 100000. ( do not change after start command issued)

[09] [00] [B8] [00] [00] [A0] [86] [01] [00]

2-Set the RF Filter mode to automatic.

[06] [00] [44] [00] [00] [00]

3-Set the A/D mode to Dither and Gain of 1.5.

[06] [00] [8A] [00] [00] [03]

4-Set the NCO frequency to 20.0MHz

[0A] [00] [20] [00] [00] [00] [2D] [31] [01] [00]

5-Send the Start Capture command, Complex I/Q data, 24 bit contiguous mode

[08] [00] [18] [00] [81] [02] [80] [00]

UDP data packets will begin being sent back to the host after this command is received.

To stop the capture process send the Idle stop command:

[08] [00] [18] [00] [00] [1] [0] [0]

Rev. 1.03 2011-11-01

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RFspace NetSDR Manuel d'utilisateur Page 31