Agilent Technologies 8753ES Option 011 Service Manual page 309

Table 10-11 Service Modes Menu Keys
Key
IF GAIN OFF
SPUR TEST on OFF
STORE EEPR on OFF
SPUR AVOID ON off
Chapter 10
GPIB
Mnemonic
N/A Switches in both of the A10 IF attenuators for checking the
A10 IF gain amplifier circuits. Small input signals will
appear noisy, and raise the apparent noise floor of the
instrument.
For factory use only.
SM7
N/A Allows you to store the correction constants that reside in
non-volatile memory (EEPROM) onto a disk. Correction
constants improve instrument performance by compensating
for specific operating variations due to hardware limitations
Chapter 3 , "Adjustments and Correction
(refer to
Constants"
backup, in case the constants are lost (due to a CPU board
failure). Without a disk backup the correction constants can
be regenerated manually, although the procedures are more
time consuming.
Offsets the frequency of both the A3 YIG oscillator and the A3
SM8
cavity oscillator to avoid spurs which cannot otherwise be
filtered out.
these spurs for service.
Service Key Menus and Error Messages
Description
). Having this information on disk is useful as a
SPUR AVOID OFF
Service Key Menus
allows examination of
10-19