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EXTERNAL MODULATION
The 3314A modulation capabilities include Amplitude Modulation (AM), Amplitude
Modulation Suppressed Carrier (AMSC) and Frequency Modulation (FM). The
3314A can also be used as a Voltage Controlled Oscillator (VCO). All of these
operations require an external modulating signal.
Amplitude Modulation
The 3314A's output signal (the carrier) can be amplitude modulated to
The sense of the AM input, along with the carrier, is inverted when Invert Func-
tion is asserted.
AM Inpllt Chancteristics.
are approximate):
Input Impedance
Input Sensitivity
Modulation
3dB Bandwidth
Envelope Distortion
Carrier Ampl with no input
>
The AM input has these operating characteristics (all values
10kO
2Vp-p = 100%
(+
1V = 2 times carrier ampl)
(-1 V = 0 times carrier amp!)
o
>
.
to
100%. Maximum limited by envelope
clipping. see AM Input Overload
.
DC to 100kHz
.
see AM Specifications
.
1/2 Displayed Amplitude
56
>
100%.
e
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