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Real-Time I/Q Baseband Generator User’s and Programming Guide
Softkey Reference
ESG Family Signal Generators
P
Options UN8 and 202
PHS
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 PHS protocol) or
a sequence that can be output one or more times.
Softkey Location:
Mode
>
TDMA
>
PHS
PHS Off On
Press this softkey to enable the PHS communications format. Setting
PHS Off On
to
On
sets up the internal hardware to generate the
structure that follows the PHS format. The internal I/Q modulator
generates
π
/4DQPSK digital modulation and the
PHS
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
PHS 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
>
PHS
>
PHS Off On
Phase Dev
Press this softkey to make the MSK (minimum shift keying) phase
deviation the active function. The current value appears under the
MSK
softkey in the Modulation Type menu.
Range: 0˚ to 100˚
Default Value: 90.00 deg
Softkey Locations
Custom:
Mode
>
Custom
>
Modulation Type
>
Select
>
MSK
>
Phase Dev
Other Formats:
Mode
>
TDMA
>
desired format
>
Modify Standard
>
Modulation Type
>
Select
>
MSK
>
Phase Dev
Phase Polarity Normal Invert
Press this softkey to reverse the direction of rotation of the phase
modulation vector. When you choose
Invert
, the in-phase component lags
the quadrature-phase component by 90
°
in the resulting modulation.
The inverted selection also applies to the I OUT and Q OUT signals.
Default Value: Normal
Softkey Locations
Custom:
Mode
>
Custom
>
Phase Polarity Normal Invert
Other Formats:
Mode
>
TDMA
>
desired format
>
Modify Standard
>
Phase Polarity Normal Invert
Summary of Contents for ESG series
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Page 446: ...I 16 Index Index ...