Evaluates: MAX2830 MAX2830 Evaluation Kit Connections and Setup General Description This section provides step-by-step instructions for getting The MAX2830 evaluation kit (EV kit) simplifies testing the EV kit up and running in all modes (see Figure 1 for of the MAX2830 receive and transmit performance in EV kit connections): 802.11g/b applications operating in the 2.4GHz to 2.5GHz ISM band. The EV kit provides 50 SMA connectors for 1) Connect the PC to the INTF3000 interface board using all RF and baseband inputs and outputs. Differential-to- the USB-A male to USB-B male cable. On INTF3000, single-ended and single-ended-to-differential line drivers remove jumper JU1 and connect a DC supply set to 3.3V are provided to convert the differential I/Q baseband to the V connector. Connect the 25-pin connector of PULL inputs and outputs to single ended. the INTF3000 (J4) directly to the 25-pin connector on the EV kit (J18). Features 2) With the power supply turned off, connect a +2.85V On-Board Line Driver and Voltage Reference power supply to V (pin 1) and V , and a REG CCAUX +3.3V power supply to V . Connect the power- 50 SMA Connectors on All RF and Baseband Ports BAT supply ground to the header labeled GND1 or GND2. PC Control Software Available at 3) With the power supply turned off, connect a +5V power www.maximintegrated.com supply to the +5V test point and a -5V power supply to Quick Start the -5V test point. Connect the power-supply ground to the header labeled GND1 or GND2. Connect all the Test Equipment Required power-supply grounds together. This section lists the recommended test equipment to 4) Make sure the jumpers are installed in their defualt verify the operation of the MAX2830. It is intended as a positions as shown in Figure 1. guide only and substitutions may be possible: 5) Turn on the +3.3V power supply, followed by the MAX2830 EV kit +2.85V power supply, +5V power supply, and -5V INTF3000+ interface board power supply. DC supply capable of delivering +5V and 200mA of continuous current 6) Install and run the MAX2830 control software, DC supply capable of delivering -5V and 200mA of available for download HERE. continuous current Receive Mode DC supply capable of delivering +3.3V and 300mA of 1) Set the RXTX jumper across pins 2-3 (RX) to enable continuous current the receiver and disable the transmitter. Set the DC supply capable of delivering +2.85V and 200mA ANTSEL jumper across pins 2-3 (ANT1) to connect of continuous current the receiver to the ANT1 port, or pins 1-2 (ANT2) to One HP8648s or equivalent signal sources capable connect the receiver to the ANT2 port. of generating 0dBm up to 3GHz 2) Set the signal generator to accurately deliver 802.11b/g CW I/Q waveform generator -100dBm at 2438MHz, at the SMA port (ANT1 or HP8561E or equivalent RF spectrum analyzer with a ANT2) of MAX2830. Connect the output of signal minimum 100kHz to 3GHz frequency range generator to ANT1 or ANT2 port of MAX2830. TDS3012 or equivalent oscilloscope with 200MHz bandwidth 3) On the Registers page of the EV kit software, set PC laptop or tablet with Microsoft Windows XP , the registers to the recommended settings in the Windows 7, 8 OS and a USB port MAX2830 data sheet by clicking the Defaults and Send All buttons. USB-A male to USB-B male cable Windows and Windows XP are registered trademarks and registered service marks of Microsoft Corporation. 19-0926 Rev 3 1/16Evaluates: MAX2830 MAX2830 Evaluation Kit 4) On the entry page, confirm that the Receive Mode is 5 On the Entry page, make sure Transmitter Mode is set to normal, Baseband Filter Mode Control is set set to normal, Baseband Filter Mode Control is set to RX, and the RF Frequency is tuned to 2437MHz. to TX, and the RF Frequency is tuned to 2437MHz. Maximize the RX LNA gain and RX VGA gain. Set the TX gain to maximum using the TX VGA Gain sliding bar. 5) Connect the spectrum analyzer to either RXBBI or RXBBQ. Set the center frequency to 1MHz with a span 6) Enable the output of the baseband signal sources. The of 500kHz. Other recommended spectrum analyzer supply current draw should be approximately 87mA. settings are: Res BW of 1kHz and Ref Level of 10dB. 7) The TX output power at 2436MHz should be 6) Turn on the RF signal source. The supply current approximately 19dBm. The LO leakage at 2437MHz draw should be approximately 74mA. should be 0dBm and unwanted sideband at 2438MHz should be -6dBm. 7) If the RF input is connected to ANT1, the output CW tone at 1MHz should be approximately -2.5dBm. If Note: CW signals can be replaced by modulated the RF input is connected to ANT2, the output CW 802.11g/b signals. tone at 1MHz should be approximately -4dBm. Layout Considerations Transmit Mode The EV kit can serve as a guide for board layout. Keep 1) Set the RXTX jumper across pins 1-2 (TX) to enable PCB trace lengths as short as possible to minimize the transmitter and disable the receiver. The transmitter parasitic inductance. Also, keep decoupling capacitors as will automatically be connected to ANT2, irrespective of close to the IC as possible with a direct connection to the ANTSEL jumper setting. ground plane. 2) Connect ANT2 port to the spectrum analyzer. Set the Power-Supply Layout center frequency of spectrum analyzer to 2437MHz and span to 10MHz. Other recommended spectrum To minimize coupling between different sections of the analyzer settings are: Res BW of 3kHz, Attenuation of IC, use a star power-supply routing configuration with a 30dB and Ref Level of 22dB. large decoupling capacitor at a central V node. The CC V traces branch out from this node, each going to a CC 3) Connect a 1MHz sinusoid to TXBBI and a 1MHz sinusoid separate V node in the circuit. Place a bypass CC with a 90 phase shift (or a cosine) to TXBBQ. Set the capacitor as close as possible to each supply pin. This input amplitude of each channel to 100mV . RMS arrangement provides local decoupling at each V CC 4) On the Registers page of the EV kit software, set the pin. Use at least one via per bypass capacitor for a low- registers to the recommended settings listed in the IC inductance ground connection. Do not share the capacitor data sheet by clicking the Defaults and Send All ground vias with any other branch. buttons. Table 1. Jumper Functions JUMPER SETTING FUNCTION Pins 2-3 Enable receive mode RXTX Pins 1-2 Enable transmit mode Pins 1-2 Connect the Rx input to ANT2 ANTSEL Pins 2-3 Connect the Rx input to ANT1 Pins 1-2 Enables the buffers TXBBBUF/RXBBBUF Pins 2-3 Disables the buffers V Pins 1-2 Short the jumper to provide voltage to the MAX2830 from the linear regulator (U10) REG Pins 2-3 Supply the V from V CCVCO REG V CCVCO Pins 1-2 Supply the V from the linear regulator (U10) CCVCO Maxim Integrated 2 www.maximintegrated.com