Connect a spectrum analyzer to the
OUTA SMA connector of the TRF1108-DAC39RFEVM.
When LMX->DACCLK |
LMX/LMK->FPGA Clocking option is Used (Default)
- Connect a signal generator to the
LMX CLKp input of the EVM. This signal generator must be a low-noise signal
generator. Configure the signal generator for the desired clock frequency in the
range of 0.8 to 10.24GHz (for this example 10.24GHz is used). For best
performance when using an RF signal generator, the power input to the LMX CLKp
SMA connector must be 8-10 dBm (2Vpp into 50Ω).
- This step is only needed if third
clocking option(EXT-> DACLK | LMK->FPGA) is used otherwise skip to next
step. Connect a signal generator to the SMA labeled LMK CLKp input of the EVM.
This signal is used to generate the necessary FPGA clock signal. Configure the
signal generator for the desired (160MHz) clock frequency. Set the output power
to approximately 5–7 dBm.
Note:
- The FPGA REF clock frequency can be obtained from
the DAC39RF10EVM GUI. Once the DAC39RF10EVM GUI is configured to the
desired JMODE mode and clock rate. The Reference Clock frequency
required by the EVM is displayed on first page of the GUI shown in
Figure 2-3.
- Make sure that the DEVCLK and Reference clock
sources are frequency-locked using a common 10MHz reference to for
functionality.
- Do not turn on the RF output of any signal
generator at this time.