N5161A/62A/81A/82A/83A MXG Signal Generators User's Guide

Working in a Secure EnvironmentUnderstanding Memory TypesTable 13-1 Base Instrument Memory (Continued)MemoryType andSizeWritable DuringNormal Operation?Data RetainedWhen Powered Off?Purpose/Contents Data Input Method Location in Instrument and RemarksFirmwareMemory(Flash)8 MBBootromMemory(EEPROM)8 kBNo Yes main firmware image factory installed orfirmware upgradeNo Yes CPU bootup parametersno user datafactory programmedYes Yes LAN configuration Front panel entry orremotelyCPU board (same chip as main flash memory,but managed separately)During normal operation, this memory cannotbe overwritten. It is only overwritten duringthe firmware installation or upgrade process.Because this memory chip contains 8 MB ofuser data and 8 MB of firmware memory(described here), a full–chip erase is notdesirable. User data areas are selectively andcompletely sanitized when you perform theErase and Sanitize function.CPU boardDuring normal operation, this memory cannotbe overwritten or erased except for LANconfiguration. This read–only data isprogrammed at the factory.CalibrationData(Flash)256 kBLCDDisplayMemory(RAM)160 kBFront PanelMemory(Flash)32 kBNo Yes factorycalibration/configuration databackupno user datafactory or serviceonlyRF BoardNo No display buffer operating system RF board, not battery backed.No No front panel keyboardcontroller firmwareno user dataoperating systemFront Panel boarda Analog instruments only308 Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide