Atec HP-Agilent-8904A - Manual (Page 2)

The Agilent Technologies 8904A
Multifunction Synthesizer uses the
latest VLSIC technology to create
complex signals from six fundamental
waveforms. The standard 8904A digi-
tally synthesizes precise sine, square,
triangle, ramp, white noise, and dc
waveforms and routes these signals
to a single output. Option 001 adds
three more identical internal synthe-
sizers (channels) which can either
modulate the first synthesizer or be
summed to the output. Frequency,
amplitude, waveform, phase, and des-
tination can be independently set for
each synthesizer. Available modula-
tion types for channel A include AM,
FM,
F M, DSBSC, and pulse modula-
tion. Option 002 adds a second 50
Ω
output, providing a second separate
signal for two channel applications.
Option 003 adds fast hop and digital
modulation capability to the 8904A.
Option 005 allows multiple 8904As to
be phase synchronized for applica-
tions which require the use of more
than one 8904A. Option 006 changes
output 1 of the 8904A from a 50
Ω
floating output to a 600
Ω
, high-power
balanced output. With this option, the
8904A can deliver 10 volts rms into a
600
Ω
load from 30 Hz to over 100 kHz.
All this unique capability makes the
8904A a powerful tool for demanding
applications like VOR, ILS, FM Stereo,
and communications signaling.
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Function synthesizer
The Agilent 8904A Multifunction Syn-
thesizer delivers synthesizer accuracy,
along with six waveforms in a compact,
economical package. Broad sinewave
frequency coverage from 0.1 Hz to
600 kHz with 0.1 Hz resolution make
the 8904A ideal for a number of low-
frequency applications. In addition to
sinewave generation, the 8904A has
five other standard functions: square,
triangle, ramp, dc, and Gaussian white
noise. Of these five, square, ramp, and
triangle functions are available from
0.1 Hz to 50 kHz. All waveform values
in the 8904A are DIGITALLY calculated
in real time by Agilent’s Digital Wave-
form Synthesis IC. The use of this chip
results in signals with very well-defined
accuracy and exact repeatability. This
means unprecedented performance at
an unexpectedly low price. Compared
with analog technologies, drift is elim-
inated, accuracy is improved, and the
number of required adjustments is
greatly reduced.
Modulation source
For demanding modulation require-
ments, where internal modulation
sources of signal generators don’t
measure up, use the Agilent 8904A
Multifunction Synthesizer. With its
digitally synthesized accuracy and
resolution, the 8904A is an ideal, yet
low cost, external modulation source
for signal generators. Besides com-
mon sinewave modulation, the func-
tions of the 8904A can be used to cre-
ate more complex modulating signals.
For example, use the 8904A to exter-
nally modulate a signal generator
with the noise function while at the
same time using internal modulation.
Using this technique accurate degra-
dation of the modulation signal-to-
noise ratio can be achieved. To accom-
modate applications requiring remote
operation for system use, the 8904A
comes with GPIB as a standard feature.
2
The Agilent 8904A
Multifunction Synthesizer . . .