Basic Operation

 

 

 

 

 

 

 

Using Security Functions

Table 2-2 Base Instrument Memory (Continued)

 

 

 

 

 

 

 

 

 

 

 

 

Memory

DuringWritable Operation?Normal

RetainedData PoweredWhenOff?

Purpose/Contents

Data Input Method

Location in Instrument and Remarks

 

 

Type

 

 

and Size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Battery

Yes

Yes

user- editable data

firmware operations

CPU board

Backed

 

 

(table editors)

 

 

The battery can be removed to sanitize the memory,

Memory

 

 

 

 

 

 

 

last instrument state,

 

 

but must be reinstalled for the instrument to operate.

(SRAM)

 

 

 

 

 

 

last instrument state

 

 

The battery is located on the CPU board.

 

 

 

 

 

512 kB

 

 

backup, and persistent

 

 

 

 

 

 

 

instrument state and

 

 

 

 

 

 

 

instrument status

 

 

 

 

 

 

 

 

 

 

 

 

Bootrom

No

Yes

CPU bootup program

factory programmed

CPU board

Memory

 

 

and firmware

 

 

During normal operation, this memory cannot be

(Flash)

 

 

loader/updater

 

 

 

 

 

 

overwritten or erased. This read- only data is

 

 

 

 

 

 

128 kB

 

 

 

 

 

programmed at the factory.

 

 

 

 

 

 

 

 

Calibration

No

Yes

factory

factory or service

motherboard

Backup

 

 

calibration/configuratio

only

 

 

Memory

 

 

n data backup

 

 

 

 

(Flash)

 

 

no user data

 

 

 

 

 

 

 

 

 

 

 

512 KB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Boards

No

Yes

factory calibration and

factory or service

all RF boards, baseband generator, and motherboard

Memory

 

 

information files, code

only

 

 

(Flash)

 

 

images, and self- test

 

 

 

 

512 Bytes

 

 

limits

 

 

 

 

 

 

no user data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Micro-

Yes

No

CPU data and

memory is managed

CPU board, not battery backed.

processor

 

 

instruction cache

by CPU, not user

 

 

Cache

 

 

 

 

 

 

 

(SRAM)

 

 

 

 

 

 

 

3 kB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 2-3 Baseband Generator Memory (Options 601 and 602)

 

 

 

 

 

 

 

 

 

 

Memory

DuringWritable Operation?Normal

RetainedData PoweredWhenOff?

 

 

 

 

 

 

 

 

 

 

 

 

Type

 

 

Purpose/Contents

 

Data Input Method

Remarks

and Size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Waveform

Yes

No

waveforms (including header

normal user

 

User data is completely sanitized when you

Memory

 

 

and marker data) and PRAM

operation

 

perform the Erase and Sanitize function. Not battery

(SDRAM)

 

 

 

 

 

 

backed.

40320 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chapter 2

61

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Agilent Technologies E8257D PSG, E8267D PSG manual Baseband Generator Memory Options 601, Base Instrument Memory

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