SDBC-DK3UG Datasheet, PDF (26/76 Pages) Silicon Laboratories – 4 buttons and 4 LEDs for custom purposes

SDBC-DK3 UG
7.2.1. Transmitter Evaluation Setup
The transmitter output of the 4432-DKDB1 test board can be connected to a spectrum analyzer in order to evaluate
output power and spectrum plots. Alternatively the transmitter output may be connected to a vector signal analyzer
to evaluate conditions such as freq vs time.
The 4432-DKDB1 testcard also provides access to the radio's GPIO which can be used as test-points for the radios
internal signals - see diagram above.
7.2.2. Receiver Evaluation Setup
Receiver evaluation can be performed by connecting the receiver port of the testcard to an RF signal generator.
The RF generator may use a data source from an external IQ generator or from its internal memory depending on
its feature set, often RF generators have a PN9 pattern option.
The 4432-DKDB1 testcard also provides access to the radio's GPIO which can be used as test-points for the radios
internal signals - see test card connection diagram.
Two modes are typically used during evaluations:
1. Direct Mode: In this mode, data is continuously sent via a source such as a PN9 generator.
2. Packet Mode: In this mode, the data source is customized in a defined packet structure.
Typically: Preamble + Sync_Word + Data payload + CRC.
Example of a 20 byte packet that can be received by the SDB firmware:
Preamble:
1010101010101010101010101010101010101010101010101010101010101010
Sync: 0010110111010100
Date: 0001010000110100001100000000100101100110001011111001110101010101
0101011101100001010011110010101111010100010000111101001101000010
1111011110011010011100001001000111000011
CRC : 1101011110011000
7.2.3. Transmitter Measurements
7.2.3.1. CW Lab Mode
Using the CW Lab Mode, users may evaluate the following:
1. Output Power
2. Frequency Offset in Transmitter Output
3. Phase Noise
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