As A Modulated Generator; As A Sweep Generator - Promax GF-941 Manual De Instrucciones

4.3.2

As a modulated generator

Generator basic signals obtained according to the utilization mode as described in
the former item are capable to be modulated whether in amplitude AM or in frequency FM.
The choice of modulation kind is carried out through the proper selector [7], the rest
condition of these selectors being the no modulation one.
AM modulation depth or FM deviation are set by means of control [8] up to the
specified limits.
As modulating signal, whether that signal an be selected that is internally provided
by the available auxiliary generator or that one able to be externally injected through
connector [19].
1.- Modulation through internal generator
Area related with internal auxiliary generator controls is indicated on the panel.
Auxiliary internal generator frequency can be selected firstly, through range selector
[15] according to limit into which the desired frequency is introduced. There are three
ranges available, covering to decades each one, 0.01 Hz to 1Hz, 1 Hz to 100 Hz and
100 Hz to 10 kHz.
Connector [19] provides an output signal that fits with
frequency and symmetry as in waveform
Take into account that output impedance is about 8 kΩ. It will be serviceable for
measuring the auxiliary generator frequency by means of an oscilloscope, a frequency
counter or for synchronism.
Modulating signal type can be selected through selector [17]. Three basic types
available are: sine, triangular and square.
Auxiliary signal symmetry can be varied through control SYMM. [18].
2.- External modulation
AM and FM selectors remain operative in this function as well as the [8] modulation
level control.
To use the external modulation, just place auxiliary function selectors [17] on rest
position, in this way the internal generator will be kept inhibed and connector [19] will
be set as external signal input.
Remember that the highest voltage applicable to the input is ± 10 V, which are
required to get a 100% 10 Vpp AM modulation.
4.3.3

As a sweep generator

In this function, the main generator operates and is used according to the above
described in item 4.3.1.
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USER'S MANUAL GF-941
modulating signal both in
04/2003