Keysight M8190A - 4.2 IQ Modulation

4 Digital Up-Conversion
130 M8190A User’s Guide
4.1.3 Configuration at Run-Time
This feature is part of the option -DUC. The sequencer controls the configuration at
run-time. This feature provides a possibility to change settings fast and with a defined
timing relationship relative to the corresponding IQ data.
4.2 IQ Modulation
The instrument is able to provide an IQ modulated signal at its output, which
is based on the IQ data provided by the customer, the selected interpolation mode, the
carrier frequency and amplitude multiplication factor.
4.2.1 Interpolated Modes
The instrument provides interpolation filters that allow an interpolation by
x3, x12, x24 and x48.
The available signal bandwidth of each interpolation filter is 0.8 x F
s
where F
s
is the
input I/Q sample rate. F
s
multiplied with the interpolation factor leads to the DAC
sampling rate.
The following table shows examples for the maximum DAC sample rate of 7200 MSa/s:
Table 4-1: Mode dependent modulation bandwidth
Interpolation Mode
Max. Input Sample Rate
Max. Modulation Bandwidth
INT_x3
2400 MSa/s
1920 MHz
INT_x12
600 MSa/s
480 MHz
INT_x24
300 MSa/s
240 MHz
INT_x48
150 MSa/s
120 MHz