Tabor Electronics 5251, User Manual

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TE5251
User Manual
1-16
ASK
ASK (amplitude shift keying) function shifts the amplitude of the
carrier frequency between two amplitude settings. The trigger input
is used for programming the amplitude value. Trigger false state
generates base amplitude and trigger true state generates shifted
amplitude. For positive true trigger state select the positive trigger
slope and for negative true trigger state select the negative trigger
slope.
3D
The 3D function is operated from an external utility only, such as
ArbConnection. The carrier waveform can be programmed to
sweep in three dimensions: frequency, amplitude and phase.
Pulse Waveforms
Using the arbitrary memory, one may use the 5251 as a stand-
alone pulse generator. All pulse parameters are adjustable
including period, pulse width, delay, rise and fall times as well as
double pulse parameters, just as you would program parameters
on a standard pulse generator. Pulse structure is limited only by the
resolution of the sample clock and the number of waveform points
that are required to create the pulse shape.
Just as it is on a standard pulse generator, the pulses that are
generated from this function are limited to one or two pulses in a
pulse train and cannot change amplitude from train to train. For
applications that require complex pulse trains where multiple pulse
sequences that have variable amplitude profiles for each pulse, one
may use the Pulse Composer program that is available in
ArbConnection.
Half Cycle
Waveforms
There are three half cycle waveforms that the 5251 generates:
sine, triangle and square. Frequency range is 10 mHz to 1 MHz
and the delay between the half cycles is programmable from 200
ns to 20 seconds with increments of 20 ns. One may also program
the start phase of the waveforms from 0.1
°
to 359.9
°
.
Counter/Timer
The 5251 can be made to operate as a stand alone counter/timer. It
can measure the following functions: frequency, period, period
averaged, pulse width and it also can accumulate and totalize
incoming pulses. The counter/timer can measure frequencies to
over 100 MHz within gate times of 100
μ
s to 1 s. Frequency and
period averaged are measured and display 7 digits in one second
of gate measurement time and with accuracy of 1 ppm.