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Real-Time I/Q Baseband Generator User’s and Programming Guide
3-27
ESG Family Signal Generators
Softkey Reference
Options UN8 and 202
C
C
C4FM
This softkey appears in two different situations, to either select a
modulation or load a default pattern into the FSK table editor.
Selecting a C4FM FSK Modulation
Press this softkey to select C4FM to modulate a continuous stream of
the selected data pattern. C4FM is an APCO 25-compliant, 4-level FSK
(frequency shift keying) modulation that transmits data at the rate of
2 bits per symbol. The modulation selection appears in the
Mod Type
field in the text area of the display, and under the
Select
softkey in the
Modulation Type menu.
NOTE
APCO 25 (Association of Public-Safety Communications
Officials - International, Inc., Project 25) is a standard-setting initiative
for public-safety communications.
Softkey Locations
Custom:
Mode
>
Custom
>
Modulation Type
>
Select
>
FSK
>
C4FM
Other Formats:
Mode
>
TDMA
>
desired format
>
Modify Standard
>
Modulation Type
>
Select
>
FSK
>
C4FM
Loading a C4FM FSK Pattern into the FSK Table Editor
Press this softkey to load a C4FM FSK (frequency shift keying)
modulation pattern into the FSK table editor. C4FM FSK modulation
transmits data at the rate of 2 bits per symbol. For details on using the
FSK table editor, see “
Building a Customized FSK Modulation with the
Softkey Locations
Custom:
Mode
>
Custom
>
Modulation Type
>
Define User FSK
>
Load Default FSK
>
C4FM
Other Formats:
Mode
>
TDMA
>
desired format
>
Modify Standard
>
Modulation Type
>
Define User FSK
>
Load Default FSK
>
C4FM
Содержание ESG series
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