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Real-Time I/Q Baseband Generator User’s and Programming Guide
3-119
ESG Family Signal Generators
Softkey Reference
Options UN8 and 202
N
N
NADC
Pressing this softkey displays a menu of softkeys where you can
generate a data pattern formatted into either a framed structure
(where the data bits are located in fields defined by the NADC protocol),
or a sequence that can be output one or more times.
Softkey Location:
Mode
>
TDMA
>
NADC
NADC Off On
Press this softkey to enable the NADC communications format. Setting
NADC Off On
to
On
sets up the internal hardware to generate a signal
that follows the NADC format. The internal I/Q modulator generates
π
/4DQPSK digital modulation and the
NADC
and
I/Q
annunciators are
turned on in the display. Although the digital modulation is enabled
with this softkey, the RF carrier is modulated by the enabled
modulation only when you have also set
Mod On/Off
to
On
.
Setting
NADC Off On
to
On
presets the following softkeys in the I/Q
menu:
I/Q Off On
is set to
On
and
I/Q Source
is set to
Int I/Q
. You can
override these selections in the I/Q menu.
Default Value: Off
Softkey Location:
Mode
>
TDMA
>
NADC
>
NADC Off On
None
This softkey appears in two different situations, enabling you to either
select a custom modulation or choose a window for the selected filter.
Selecting a Custom Modulation
With
None
selected on the
Predefined Mode
menu, then
Custom
is no
longer set up based on a particular format.
Choosing a Window
With
None
selected on the
Window
menu, the filter is optimized for
maximum passband performance (EVM).
Softkey Locations
Custom:
Mode
>
Custom
>
Predefined Mode
>
None
Other Formats:
Mode
>
TDMA
>
desired format
>
Modify Standard
>
Filter
>
Define User Fir
>
Load Default FIR
>
Root Nyquist
(or any other
filter) >
Window
>
None
Содержание ESG series
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