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4.8
List Mode
The List mode is useful in production or automatic test environments where it is desirable to
switch between a number of preset frequencies or "markers" under hardware control. Once in
list mode, a terminal or host computer is no longer required to set the output frequencies.
The List Mode allows the setting of the 32 preset frequencies. When the list mode is set using
the MODe LIST command, the source output frequency is set by the list frequency settings and
the 5-bit logic state of the USER PORT. Not all 32 preset entries have to be set. Unless user
modified, the default list frequency settings for all 32 settings is 2445MHz for source 1 and
2465MHz for source 2.
List entry
4.8.1
Source<1|2>;List <N > <Fn> [<U>] [<ATTn>];
This mode sets the specified synthesizer frequency to the values set in the list table. The list
table can have up to 32 entries. N is the list number.
An example of the list command: S1; list 5 2155m would set source 1 LIST frequency number 5
to 2155MHz.
List?, List, or LI will return the 32 list entries from current source.
Source <1|2>;LIST? will return the list from the selected source.
Source<1|2>;LIST? <N> [<U>] will return only the frequency of the nth entry of the selected
source in the units specified.
After setting the list frequencies, remember to use the SAVE command to store the list
frequencies to flash memory.
Attenuator entries may also be set with the list frequency. The method below shows how to set
an attenuator value for a specific LIST entry. If the attenuator value is not specified after the LIST
command, then the attenuator value set globally by the ATTenuator command will be retained.
Source<1|2>;LIST <n> <Fn> <U> <0.0|0.5|1.0|...63>
For example to set the third entry into the currently selected source, type:
LI 3 2450 12
to set entry 3 to 2450 MHz with an attenuator setting of 12.
List hardware Control
4.8.2
See Section 5 User Port for information on hardware control of the List selection. The List
selection can either be done with a switch closure to ground or by TTL logic level.
Valon Technology 5009a Operations Manual – Version 1.38
Page 29
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