158
Width Deviation
≤
Period - Pulse Width – Wmin
Where:
Wmin = 20 ns for period
≤
10 s.
Wmin =
20 ns for period
> 10 s, but
≤
100 s.
Wmin =
2
μ
s for period
> 100 s, but
≤
1000 s.
Wmin =
20
μ
s for period
> 1000 s.
Also
Width Deviation
≤
Pulse width – (1.6 X Edge time)
And
Width Deviation
≤
Period - Pulse width – (1.6 X Edge time)
When you choose an external source (PWM:SOUR EXT), the width deviation is
controlled by the ±5V signal level shown on the
Modulation In
connector on the
rear panel. It means that when the modulating signal is at +5V, the output will
be at its maximum width deviation, and when the modulating signal is at -5V,
the output will be at its minimum duty cycle. Lower external signal levels
produce less deviation, and negative signal levels produce negative deviation.
Note: The operation of this command is affected by FUNC:PULS:HOLD
command. FUNC:PULS:HOLD command decides if the pulse width or the duty
cycles are to be held constant as the period varies. If the pulse width is held
constant, so is the pulse width deviation; If the duty cycle is held constant, so is
the duty cycle deviation. If one is held constant, the other specified in the
command will be automatically converted to the equivalent value.
PWM:DEViation? [MINimum|MAXimum]
Query the pulse width deviation. The pulse width deviation is seconds will be
returned.
PWM:DEViation:DCYCle {< deviation in
percent>|MINimum|MAXimum}
Specify the duty cycle deviation in percent. This value represents the duty cycle
variation in the modulated waveform from the duty cycle in the original pulse
waveform, and it is in the form of a percentage of the period.
The default duty cycle deviation is 1%, and the range is from 0% to 100%. The
minimum value is 0% and the maximum value is approximately 100% (limited
by the period, minimum pulse width, and edge time). More over, it must not be
Summary of Contents for G5100A
Page 5: ...5 D APPLICATION PROGRAMS 173 ...
Page 71: ...71 Schematic of Receiver ...
