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3152B User Manual
Publication No. 980935 Rev. A
PSK
The PSK group contains parameters that control the phase shift
keying function. These are: control data, “0” and “1” frequencies,
baud rate, and marker position.
Control Data
– The Control Data button in the PSK group provides
access to the data string that controls the sequence of base phase
and shifted phase. It contains the list of “0” and “1” values that the
output will repeatedly follow for its phase shift keying sequence
advance as programmed.
“0/1” Phase
– In PSK, the carrier waveform (CW) has two phase
settings: an initial phase which is set by the “0” Phase parameter
and shifted phase which is set by the “1” Phase. The control data
table has a list of “0” and “1” values that flag when the phase shifts
from base to shifted phase.
Baud
– The baud parameter sets the rate at which the generator
steps through the sequence of the PSK Control Data bits.
Marker Index
– The marker index programs a step 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 PSK marker
output.
To access the required parameter, click on the button below
parameters sub-group until the LED next to the required parameter
turns on. The value that is associated with the lit LED is displayed
on the digital display. You can use the dial, keyboard, or the [
↑
] [
↓
}
keys to adjust the readout to the required setting. After you modify
the reading, click on the Modify/Execute knob to update the 3152B
with the new reading.
ASK
The ASK group contains parameters that control the amplitude shift
keying function. These are: control data, non-modulated and shifted
phases, and baud and marker position.
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 the list of “0” and “1”
values that the output will repeatedly follow for its amplitude shift
keying sequence advance 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 at which the generator
steps through the sequence of the ASK Control Data bits.
Marker Index –
The marker setting programs a 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
4-26 ArbConnection
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