Test and Measurement Technical Data
DSA-1 firmware upgrade procedureDownloading firmware updates
The DSA-1's operating firmware is stored in a 'FLASH' memory within the unit. This allows the code to be updated without the need to open the DSA-1 case, or to replace any ICs. Instead, the host PC downloads the firmware using the serial port, so updates can be easily circulated. The DSA-1 firmware downloader program is an MS-DOS application. The latest version of the software can be found here.
NOTE: The DSA-1 is supplied with the most up-to-date version of the operating firmware. Do not download the DSA-1 firmware unless you have received an updated version of the firmware!
Before running the loader, make sure that a connection is made between the DSA-1 and a serial port on the host PC using a null-modem cable (see this tech tip for pin-out details) and that the DSA-1 is powered from its DC adapter. Now turn on the DSA-1 whilst holding down the [EDIT/CLEAR] and [DI] keys. The DSA-1 should power-up with the message:
If this message does not appear, power down and try again. Note that if only the upper line of the message is displayed, DC power has not been detected and the process must be restarted with DC applied.
When the message is displayed correctly, choose the directory in which the DOS support software in installed on the host PC (usually C:\DSADOS), and at the prompt type:
C:\DSADOS> dsaload dsavXpXX.dld<Enter> (Here XpXX represents the version of software, eg, 2p20)
if the COM1: serial port is in use or, alternatively, if you are using the COM2:serial port:
C:\DSA1> dsaload dsavXpXX.dld -2<Enter>
The DSA-1 display should then display a sequence of messages describing the erasing and block-loading of the FLASH memory. Finally, when loading is complete, the DSA-1 will start to run the new firmware. The PC should also confirm that the download has completed. If the download fails, make a note of any error message and contact your distributor. Note that even if the download fails, you can repeat the process since the 'boot' firmware in the DSA-1 is stored in an area that cannot be erased. If the DSA-1 detects that its firmware is incorrect, it enters the download mode automatically on power up.
It is wise to ensure that you have a copy of the existing firmware before updating, since you can reload the old firmware if you need to. Also, note that all setup options, User Test Sequences and the Results Log are automatically cleared as the new firmware starts for the first time.