CDC

AUX IN

/3

/4

CDCE72010

AFE722x

TSW3100

368.64MHz

122.88MHz

92.16MHz

Initial EVM Setup and Basic Test Procedure

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4

Initial EVM Setup and Basic Test Procedure

The fastest way to get the AFE722x EVM up and running is to follow this operating procedure:

•

Two signal generators should be connected to the clock and data input of the EVM - preferably with

band pass filter and 10MHz reference locked for coherency.

•

Clock input should be connected to

‘CDC AUX IN’ input for AUX clock setup and the clock generator

amplitude should be set to ~10-13dBm.

•

TSW1200 (RX) capture card should be plugged in AFE722x EVM and connected to the PC via USB.

•

TSW3100 (TX) pattern generation card plugged into AFE722x EVM and connected to PC via Ethernet

cable.

•

All appropriate power supplies should be connected

– blue LED (D2) on AFE722x EVM indicating

power good status.

•

After performing USB reset in AFE722x EVM software, the flashing USB warning sign should

disappear indicating successful USB communication.

4.1

CDCE72010 Configuration

The initial EVM setup is configured so that the AFE722x can be operated at any desired sampling rate.

Since the TSW3100 requires an external clock at

¾ of the AFE clock rate (see clocking section) the

external clock applied to the

‘CDC AUX IN’ connector needs to be 3x the AFE sampling rate (e.g.

368.64MHz for 122.88MHz operation). Loading a preconfigured register file (

‘AUX IN - div3 AFE div4

TSW.txt

’) to the CDCE72010, it then sets the dividers so that a /3 copy of the input clock is routed to the

AFE722x clock input and a /4 copy to the TSW3100.

4

EVM Description

SLOU330

– December 2011

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