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5820A
Operators Manual
4-8.
Using the Format EEPROM Menu
To avoid losing calibration constants, use with extreme care.
The format nonvolatile memory menu softkeys permanently
erase calibration constants. Pressing ALL or CAL invalidates
the state of calibration of the 5820A.
Pressing FORMAT NV MEM in the utility functions menu opens the following:
All the softkeys in this menu require the rear panel CALIBRATION switch to be in the
ENABLE position. The nonvolatile memory contains calibration constants and dates,
setup parameters, and the user report string. In the case of calibration constants, factory
defaults are the same for all Calibrators. They are not the calibration constants obtained
when the 5820A was calibrated by the factory before shipment. The softkeys are:
•
•
•
Host Connection
GPIB Port Address
Serial Ports
SRQSTR
* Output Display and Control Display, respectively. There are 8 levels: 0,1,2,3,4,5,6,7.
4-6
f
f
ALL Replaces the entire contents of the EEPROM with factory defaults. This would
be used by service personnel after replacing the EEPROM, for example. It is not
required in normal use.
CAL Replaces all calibration constants with factory defaults but leaves all the setup
parameters unchanged. This is also not required in normal use.
SETUP Replaces the setup parameters with factory defaults (Table 4-1) but leaves
the state of calibration unchanged. You do not have to break the calibration sticker
for this operation. Note that remote commands can change the setup parameters. (See
these commands in Chapter 6: SRQSTR, SPLSTR, *PUD, SP_SET,
UUT_SET.)
Table 4-1. Factory Defaults for SETUP
gpib (IEEE-488)
4
8 bits, 1 stop bit, xon/xoff, parity
none, 9600 baud, wait 30 sec.
Remote commands (see Chapter 6)
SRQ: %02x %02x %04x %04x
WCaution
Format NV Memory
All
CAL
SETUP
f
f
Features
f
Display Brightness*
level 1,0
EOL (end of line)
CRLF
Remote I/F
term
*PUD string
cleared
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