Adjusted update rate for a digital to analog converter (DAC) is the DAC sample rate divided lowest interpolation factor. If the DAC has not interpolation included on chip then the Adjusted update rate is just the DAC sample rate or the incoming data rate. If the DAC has interpolation but it can be bypassed such that the incoming data rate equals the sample rate then the adjusted sample rate is equal to the sample rate. if the DAC has a fixed interpolation, say 2x Interpolation on chip, then the adjusted update rate is the DAC sample rate divided by 2. This is also the same as the incoming data rate. In high speed DAC it is common to see 2,4 or 8 x interpolation along with complex modulation. In a part like this you could load data at 250MSPS with 4x interpolation and the DAC sample rate would be 1GSPS. This DAC mode puts the images up at higher frequency to allow easier filtering and also allows the output bandwidth to be placed at half the DAC sample rate or 500MHz. In summary the Adjusted update rate is the effective input sample rate and it determines the maximum frequency bandwidth the DAC can output. With the use of digital predistortion the DAC samples rates have increase significantly in the past coupel of years for transmit architecture used in WIFR base stations.

Adjusted update rate for a digital to analog converter (DAC) is the DAC sample rate divided lowest interpolation factor. If the DAC has not interpolation included on chip then the Adjusted update rate is just the DAC sample rate or the incoming data rate. If the DAC has interpolation but it can be bypassed such that the incoming data rate equals the sample rate then the adjusted sample rate is equal to the sample rate. if the DAC has a fixed interpolation, say 2x Interpolation on chip, then the adjusted update rate is the DAC sample rate divided by 2. This is also the same as the incoming data rate. In high speed DAC it is common to see 2,4 or 8 x interpolation along with complex modulation. In a part like this you could load data at 250MSPS with 4x interpolation and the DAC sample rate would be 1GSPS. This DAC mode puts the images up at higher frequency to allow easier filtering and also allows the output bandwidth to be placed at half the DAC sample rate or 500MHz. In summary the Adjusted update rate is the effective input sample rate and it determines the maximum frequency bandwidth the DAC can output. With the use of digital predistortion the DAC samples rates have increase significantly in the past coupel of years for transmit architecture used in WIFR base stations.