Performing A Frequency Sweep - Analog Devices AD5934 Manual

PERFORMING A FREQUENCY SWEEP

RESET: BY ISSUING A RESET COMMAND TO
THE CONTROL REGISTER, THE DEVICE IS
PLACED IN STANDBY MODE.
PROGRAM FREQUENCY SWEEP PARAMETERS
INTO RELEVANT REGISTERS
(1) START FREQUENCY REGISTER
(2) NUMBER OF INCREMENTS REGISTER
(3) FREQUENCY INCREMENT REGISTER
PLACE THE AD5934 INTO STANDBY MODE.
PROGRAM INITIALIZE WITH START
FREQUENCY COMMAND TO THE CONTROL
REGISTER.
AFTER A SUFFICIENT AMOUNT OF SETTLING
TIME HAS ELAPSED, PROGRAM START
FREQUENCY SWEEP COMMAND IN THE
CONTROL REGISTER.
POLL STATUS REGISTER TO CHECK IF
THE DFT CONVERSION IS COMPLETE.
N
Y
READ VALUES FROM REAL AND
IMAGINARY DATA REGISTERS.
Y
POLL STATUS REGISTER TO CHECK IF
FREQUENCY SWEEP IS COMPLETE.
Y
PROGRAM THE AD5934
INTO POWER-DOWN MODE.
Figure 30. Frequency Sweep Flowchart
Rev. A | Page 21 of 40
PROGRAM THE INCREMENT FREQUENCY OR
THE REPEAT FREQUENCY COMMAND TO THE
CONTROL REGISTER.
N
AD5934