Introduction to PRBS Test
7
SLAA750 – July 2017
Copyright © 2017, Texas Instruments Incorporated
DAC38RF8x Test Modes
Table 1. Register Writes for Custom Setup
Page
Address
Bit
Value
Function
1.
0
0x00
14, 13
1, 1
Enable alarm output active high
2.
4
0x3E
14
1
Align disable
3.
4
0x1B
11:8
0x3
Set DTEST to TESTFAIL
4.
1
0x4F
0
0
Uncheck Comma Align En
5.
2
0x4F
0
0
Uncheck Comma Align En
6.
4
0x3D
15:12
0x2
To Select PRBS7
7.
4
0x3D
15:12
0x3
To Select PRBS23
8.
4
0x3D
15:12
0x4
To Select PRBS31
NOTE:
Users should only perform one of the last three register writes which corresponds to the
desired PRBS test. After performing the register writes, send the pattern to the DAC though
the FPGA connection.
1.6
TSW14J56 SETUP for PRBS Tests
When the DAC has been configured properly, the PRBS pattern is ready to be sent. Launch the HSDC
Pro application and navigate to the
Quick Start
tab. A window pops up asking the user to select a device.
Select the TSW14J56 RevD board and click the
OK
button (see
Figure 7. HSDC Pro Select-Board Menu
A box pops up indicating that no firmware is connected. Click the
OK
button and switch to the
DAC
tab in
the HSDC Pro application by using the tabs located at the top of the window (see
Figure 8. HSDC Pro DAC Tab
Open the drop-down menu in the top left corner by clicking the green arrow beside the
Select DAC
box.
Select
PRBS_DAC38RF8x_LMF_841_RevD
. Click
Yes
in the window that pops up to update the
firmware.
