Spectrum Setup Operations
Mode l8500C/8500C+ Operators Manual
7-5
7.3.1.7 Signal Selector Velocimeter Channel(s)
If a Model8520C Signal Selector is attached to the 8500C/C+, the velocimeter channel field(s) allow
you to select the Signal Selector velocimeter channel(s) to be analyzed. Use the
<CHANGE
soft key
to select an operator symbol, ei ther+ (to add signa ls), or- (to subtract signals), or
ONLY
(to select one
channel only). Channels are selected by positioning the screen cursor over the channel number to be
changed and entering a new value from the numeric keypad. See Chapt er11 “Mode l8520C Signal
Selector” for a complete description of this instrument.
NOTE: If the Signal Selector is not attached to the 8500C/C+, these fields do not appear.
7.3.2 Using Spectrum Setups
The Spectrum mode parameters displayed in the Spectrum Setup screen may be saved and recalled, as
desired. This feature allows you to restore commonly used parameters without having to manually
re-enter the information.
spectrum setup
thus consists of all the setup parameters explained in this
chapter plus the current printout annotation (see S ection8.3 Annotating Printouts” on pa ge8-5 for
more details on printout annotations).
7.3.2.1 Saving Setups
To save a spectrum setup, call up the Spectrum Setup screen and press the
STORE
key. The current
setup information is then saved to memory. If the
STORE TO
field in the Status screen has been set to
DISK
, the setup information is saved to disk, as well as memory.
NOTE: It is strongly recommended that 8500C/C+ distribution chart disks not be used to
store spectral data files; instead, use a backup copy of the chart disk and store the original
chart disk in a safe place. Instructions for making a backup disk are located in
Secti on10.2.4 “Copying Balance Charts” on p age10-6.
When a spectrum setup is saved you are first asked to name it (see Fi gure7- 5 on page7-6). If the name
of a spectrum setup is the same as the name of a previously saved setup, the 8500C/C+ asks you to
rename the current setup before writing it (se e Section7.3.2.3 Renaming Setups” on pa ge7-6).
Saved spectrum setups are stored in 8500C/C+ battery-backed memory. Since the contents of battery-
backed memory are preserved when power to the instrument is turned off, it is not necessary to reload
or recreate the same setups each time a restart occurs. These setups are always available when the setup
selection menu is displayed. The only limit to the number of setups that may be kept on-line in this
manner is the amount of available battery-backed memory. To clear spectrum setups from battery-
backed memory, use the
CLEAR ONE
or
CLEAR ALL
soft keys explained in Sect ion7.3.2.4 “Deleting
Setups” on pa ge7-7.
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