SNAS740B October 2017 – January 2019 LMX2572
PRODUCTION DATA.
The LMX2572 supports the ability to make frequency ramping waveforms using manual mode or automatic mode.
In manual ramping mode, the user defines a step and uses the RampClk and RampDir pins to create the ramp. The output frequency jumps from one frequency to another frequency on each ramp.
In automatic ramping mode, the user sets up the ramp with up to two linear segments in advance and the device automatically creates this ramp. The output waveform is a continuous frequency sweep between the start and end frequencies. If the frequency ramping range is small (approximately 10 MHz), no VCO calibration break is necessary in the middle of the ramp.
When using ramp, the following must be set accordingly: