Software Control
16
SLAU374B – December 2011 – Revised May 2016
Copyright © 2011–2016, Texas Instruments Incorporated
TSW308x Evaluation Module
2.2.5
Register Control
●
Send All: sends the register configuration to all devices.
●
Read All: reads register configuration from DAC348x and LMK04800 devices.
●
Load Regs: loads a register file for all devices. For Windows XP system, example configuration files
for the common frequency plan are located in the install directory: C:\Program Files\Texas
Instruments\TSW308x\Configuration Files. For Windows 7 system, the files are located in the install
directory: C:\Program Files (x86)\Texas Instruments\TSW308x\Configuration Files
– Select
Load Regs
button.
– Double-click on the
Configuration Files
folder and respective sub-folders for the EVM.
– Double-click on the desired register file.
– Click on
Send All
to ensure all the values are loaded properly.
●
Save Regs: saves the register configuration for all devices.
2.2.6
Attenuator Control
Figure 10. RF Attenuator Control
Each of the RF path on the TSW308xEVM contains a 50-
Ω
, RF digitally controlled attenuator that
operates from DC to 4 GHz. This highly versatile digital step attenuator (DSA) covers a 0-dB to 31.75-dB
attenuation range in 0.25-dB steps. It maintains high attenuation accuracy over frequency and
temperature and exhibits very low insertion loss (1.9 dB, typical) and low-power consumption. The user
can enter a value from 0 (minimum attenuation) to 31.75 (maximum attenuation) in 0.25 increments inside
the Attenuator window (
) or by clicking on the drop-up/-down arrows.
2.2.7
Miscellaneous Settings
●
Reset USB: toggle this button if the USB port is not responding. This generates a new USB handle
address.
– Note: It is recommended that the board be reset after every power cycle, and the reset USB
button on the GUI be clicked.
Figure 11. USB Port Reset
●
Exit: stops the program
