Evaluates: MAX2838
4) Press the SEND ALL button.
5) In the Registers panel of the software, set ENABLE
and RXTX to be 1 to activate the receive path.
6) In the RX panel of the software, toggle the LNA gain
enable and the baseband VGA enable both to be
SPI. Set both of the gain controls to be max.
7) Turn on the RF signal source. The output CW tone
at 1MHz should be approximately 0dBm.
Transmit Mode
1) Connect the spectrum analyzer to the TXRF port.
Set the center frequency to be 3600MHz and the
span to be 5MHz.
2) Connect a 1MHz I/Q signal to pins TXBBI and
TXBBQ, respectively. Set the input amplitude of
each channel to 90mV
RMS
with 90 degrees phase
shift.
3) In the Registers panel of the software, set ENABLE to
be 1 and RXTX to be 0 to activate the transmit path.
4) In the Registers panel of the software, enter the rec-
ommended register setting shown in Figure 2.
5) Press the Send All button.
6) Enable the output of the baseband signal sources.
The desired tone, LO leakage, and the sideband
appear at 3601MHz, 3600MHz, and 3599MHz,
MAX2838 Evaluation Kit
4
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Figure 1. Receive Mode Register Setting
