ML248xx, ML249xA MM PN: 13000-00164 Rev. K 7-1
Chapter 7 — Firmware Updates
7-1 Introduction
The power meter uses a flash EPROM to store the operating program. New versions of the operating program
can be installed using a personal computer connected through the serial interface. Firmware updates are
available from your nearest Anritsu Customer Service Centre.
This chapter describes the use of the Code Loader Program and the configuration of the required RS-232 cable.
Also described is the procedure to change the serial number of the unit. This will allow a new control PCB to be
fitted and then the unit serial number to be programmed in to the new PCB.
7-2 Code Loader Program
The Code Loader Program is a DOS based program used to transfer updated firmware into the Flash Memory.
Program Installation
1. Extract the contents of the zip file into an empty directory on the hard drive of your computer.
2. The installation on the computer is now complete.
Running the Program
1. Connect the computer serial COM port to the power meter back panel RS-232 serial connector, using the
Anritsu Serial Interface cable (P/N: B41323) or equivalent (refer to Section 7-4).
2. Apply power to the power meter and allow it to complete the POST (Power On Self Test). Power sensors
need not be connected at this time.
3. On the power meter front panel, press:
a. System | Service | Upgrade
A message displays prompting the user to ensure that the serial cable is connected.
b. Check the cable and press Continue when ready.
A message displays to notify the user that software is being downloaded.
4. If the bootload cable is connected to port 1 of your personal computer, double click on the shortcut icon
boot1. (This is in the directory to which that the zip file was extracted). If connected to port 2, use boot2.
The program will proceed to download the new operating system to the power meter.
The program takes about 10 minutes to complete the update, during which time the power meter LCD
screen will be dark. When the downloading is complete, the power meter will reboot and be ready for
normal use.
5. Disconnect the serial interface cable from the computer and the power meter.
6. Verify that the new firmware version was successfully installed by pressing:
System | Services | Identity
7. The new firmware version will be displayed on the front panel.
Caution
Disable Windows screen savers before attempting to run the code loader program. Do not interrupt
the downloading process as corruption of the EPROM program may result (refer to Section 7-3).
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