Tabor Electronics 5251, User Manual

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TE5251
User Manual
3-24
Figure 3-15, the Sweep Modulation Panel
ASK/FSK/PSK
The ASK/FSK/PSK panel contains parameters for controlling the
ASK, FSK and the PSK functions. To select the required function,
click on the appropriate button and adjust the parameters in the
associated group. The various controls in the ASK/FSK/PSK groups
are described below.
ASK
Control Data
The Control Data button in the ASK group provides access to the
data string that controls the sequence of base amplitude and shifted
amplitude. It contains a list of “0” and “1” and the output will
repeatedly follow the amplitude shift keying sequence in the same
order as programmed.
“0/1” Amplitude
In ASK, the carrier waveform (CW) has two amplitudes: an initial
amplitude level which is set by the “0” Amplitude parameter and
shifted amplitude which is set by the “1” Amplitude. The control data
table has a list of “0” and “1” values that flag when the amplitude
shifts from base to shifted amplitudes.
Baud
The baud parameter sets the rate of which the generator steps
through the sequence of the ASK Control Data bits.
Marker Index
The marker setting programs a specific step (index) in the control
data string to output a pulse at the SYNC output connector. The
SYNC State button must be turned on to generate the ASK marker
output.