3-6
Real-Time I/Q Baseband Generator User’s and Programming Guide
Softkey Reference
ESG Family Signal Generators
Numerics
Options UN8 and 202
4QAM
This softkey appears in two different situations, enabling you to either
select a modulation, or load a default I/Q map into the I/Q table editor.
Selecting a 4QAM Modulation
Press this softkey to select 4QAM (4-state quadrature amplitude
modulation) to modulate a continuous stream of the selected data
pattern. 4QAM modulation transmits data at the rate of 2 bits per
symbol. The selected modulation appears in the
Mod Type
field in the
text area of the display, and under the
Select
and
QAM
softkeys in the
Modulation Type menu.
Softkey Locations
Custom:
Mode
>
Custom
>
Modulation Type
>
Select
>
QAM
>
4QAM
Other Formats:
Mode
>
TDMA
>
desired format
>
Modify Standard
>
Modulation Type
>
Select
>
QAM
>
4QAM
Loading a 4QAM I/Q Map into the I/Q Table Editor
Press this softkey to load a 4QAM (4-state quadrature amplitude
modulation) I/Q map into the I/Q table editor. For details on editing I/Q
maps, see “
Mapping Symbol Positions with the I/Q Table Editor
Softkey Locations
Custom:
Mode
>
Custom
>
Modulation Type
>
Define User I/Q
>
Load Default I/Q Map
>
QAM
>
4QAM
Other Formats:
Mode
>
TDMA
>
desired format
>
Modify Standard
>
Modulation Type
>
Define User I/Q
>
Load Default I/Q Map
>
QAM
>
4QAM
8 1’s & 8 0’s
Use this softkey to select a binary data pattern that consists of eight
ones followed by eight zeroes. This selection is available either as a data
pattern (not framed) or for use with framed data transmissions.
Selecting an 8 1’s & 8 0’s Data Pattern
When you select
8 1’s & 8 0’s
, both the
Data
and the
Other Patterns
softkeys show this selection. In addition,
P8
(where “P” refers to Pattern
and “8” refers to eight ones and eight zeroes) is displayed in the
Data
field in the top line of the text area of the display.
Softkey Locations
Custom:
Mode
>
Custom
>
Data
>
Other Patterns
>
8 1’s & 8 0’s
Other Formats:
Mode
>
TDMA
>
desired format
>
Data
>
Other Patterns
>
8 1’s & 8 0’s
Summary of Contents for ESG series
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