Output Controls; Auxiliary Generator Controls - Promax GF-941 Manual De Instrucciones

USER'S MANUAL GF-941
[6] Variable symmetry control
This control permits on-time symmetry of the output signal to be varied steadily, in
both directions in regard with the middle symmetric value.
This control is inoperative when selector [5] is released.
[7] Modulation selectors
To select amplitude (AM) or frequency (FM) modulation.
Both selectors released will determine the current operation mode. Control [8]
becomes active when using one of these three possibilities.
[8] Modulation and sweep control
When the modulated generator is used in AM and FM through selector [7], this
control allows modulation index to be varied from 0 to the highest value as specified
in each case. It maybe used with an outer modulating signal too.
When using the appliance as a sweep modulator, i.e. SWP function of selector [17],
this control determines the lowest frequency of such a variation.
[9] Trigger control (TRIGGER)
The generator current working position is at the "OFF" counterclockwise end of this
control. When driving it, trigger point on which the main generator signal will start can
be changed; the ending point will be at the same level as the starting point.
4.1.3

Output controls

[10] Amplitude control
It permits output signal level to be varied continuously from the highest specified level
and with an about 20 dB range.
[11] Output attenuator
It consists of three attenuating cells: 40, 20 and 3 dB respectively. On keeping the
output impedance constant, discrete step levels can be reduced until 63 dB,
combining either three cells.
[12] Direct voltage level control "DC OFFSET"
Generator current operation is at the "OFF" counterclockwise position of this control.
When driving this control, a direct voltage will overlap the desired value output signal,
within specified limits.
[13] Polarity selector
It settles the direct voltage polarity allowed to be overlapped on the output by control
[12]. This selector is inoperative when control [12] is at OFF position.
[14] Output connector
This is the main generator output and the output impedance is 50 Ω.
4.1.4

Auxiliary generator controls

[15] Frequency range selector
It consists of three selectors to choose that range in which the chosen frequency is
included. Each selector covers two decades to obtain the 0.01 to 10 kHz total range.
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