Production Testing

Overview

The purpose of this test procedure is to identify connectivity issues, poor soldering, and potential manufacturing defects in the AD-SYNCHRONA14-EBZ board. Some issues are directly identified by explicit part-targeted tests, while others are detected implicitly by running adjacent tests.

Test Duration

Step Description	Estimated Time (minutes)
Test bench setup	10 min
Software test	15 min
Total time	25 min

Test Requirements

Required Hardware

• AD-SYNCHRONA14-EBZ board

• Raspberry Pi 4, power cable (USB-C), HDMI cable

• ADALM2000 with BNC adapter

• BR-068851 connector board with ribbon cable

• Twinax cable assembly

• Micro-USB cable

• Ethernet cable

• QR code scanner

• Mouse and keyboard

• Dymo LabelWriter450 printer

• Front panel SMA cable

• Back panel SMA cable

• 50 Ohm terminator

Required Software

• SD card with the test image

Required Setup

Figure 1 Test setup overview

• Insert the SD card into the Raspberry Pi.

• Connect the ADALM2000’s BNC adapter to both the front and back panel SMA cables, with USB connection to the Synchrona board.

• Connect the Raspberry Pi’s GPIO pins via ribbon cable to the BR-068851 adapter board, which connects via USB.

  

  Figure 2 BR-068851 connection

• Add a wire to the V_IO select pin, and configure the EN pins with a jumper.

  

  Figure 3 V_IO select and EN pins configuration

• Connect an Ethernet cable between the Raspberry Pi and the Synchrona board.

• Connect the QR code scanner, keyboard, and display to the Raspberry Pi.

• Connect the Dymo LabelWriter450 printer via USB to the Raspberry Pi.

• Power on the Raspberry Pi via USB-C.

• Power on the Synchrona board by pressing the front panel power button. Allow approximately 30 seconds for initialization.

Test Process

Starting the Test

• After the Raspberry Pi boots, the test screen will appear on the monitor.

  

  Figure 4 Initial test screen

• Type 1 and press ENTER to start the Production Testing.

• Scan the board’s serial number QR code when prompted.

  

  Figure 5 QR code scanning prompt

Front Panel Output Testing

• Test channels 1-10 by sequentially connecting the front panel SMA cable to each port’s P and N connectors.

  

  Figure 6 Channel 1 test

  

  Figure 7 Front panel channel testing

• For channels 11-14, use the Twinax-to-SMA adapter with a probe connection.

  

  Figure 8 Twinax adapter for channels 11-14

  

  Figure 9 Channels 11-14 testing

Back Panel Input Testing

• Attach the back panel SMA cable to REF IN, PPS, CH2, and CH3 inputs sequentially.

• When testing CH2 and CH3, connect to only one connector (P or N) and place a 50 Ohm terminator on the unconnected port.

  

  Figure 10 50 Ohm terminator placement

  

  Figure 11 Back panel connections

Communication Testing

• Attach the BR-068851 adapter to the GPIO port.

  

  Figure 12 BR-068851 attached to GPIO port

• Verify UART COMM 01, UART COMM 02, and SPI communication functionality.

  

  Figure 13 Communication test screen

Visual Inspection

• Verify that LED STAT1 displays yellow and STAT2 displays red.

• Confirm fan operation.

  

  Figure 14 LED and fan verification

Cleanup

• Power off the board.

• Remove the BR-068851 adapter.

• Reboot the Raspberry Pi for cleanup operations.

  

  Figure 15 Cleanup prompt

  Important

  Make sure to reboot the board in order to perform clean-up.

Final Steps

• The printer generates a label for placement on the board’s rear.

  

  Figure 16 Label placement reference

• The test concludes with a PASSED or FAILED message displayed on screen.

  

  Figure 17 Test passed screen

• If all tests pass, you can move onto the next D.U.T.

• When you are done testing, press 2 and hit ENTER to power off the Raspberry Pi.