Pulse Modulation - Holzworth Instrumentation HS9000B Series User Manual

8.3.1 Pulse Modulation

The PULSE mode set button gives the user access to the pulse control panel. This allows for
setting external pulse modulation, internal pulse modulation, or internal pulse modulation with
trigger. Additional settings related to internal pulse modulation include: the pulse repetition rate, the
pulse width, and the number of pulses.
REPETITION RATE: The pulse rep rate allows the user to set the time between rising
edges of a pulse. This setting does not apply when using external pulse modulation.
WIDTH: The pulse width allows the user to set the time interval between the leading edge
and trailing edge of a pulse. This setting does not apply when using external pulse
modulation.
NUMBER OF PULSES: The number of pulses allows the user to specify the number of
output pulses. This setting only applies when using internal pulse modulation with trigger.
A trigger signal at the modulation input port will start the output pulsing and the counter to
track the number of pulses.
PARAMETER
INTERNAL "SELF" PULSE MODULATION (channels up to 6.7GHz)
Risetime (T )
r
fc < 512MHz
fc > 512 MHz
Falltime (T )
f
fc < 512MHz
fc > 512 MHz
On/Off Ratio
Minimum Pulse Width
ALC Loop Deviation (ALC disabled)
PARAMETER
PULSE MODULATION w/ External Stimulus (channels up to 6.7GHz)
Risetime (T )
r
Falltime (T )
f
On/Off Ratio
Minimum Pulse Width
ALC Loop Deviation (ALC disabled)
PARAMETER
PULSE MODULATION w/ External Stimulus (12.5 and 20GHz channels)
Risetime (T )
r
Falltime (T )
f
On/Off Ratio
10MHz to 2GHz
2GHz to 5GHz
5GHz to 18GHz
Minimum Pulse Width
ALC Loop Deviation (ALC disabled)
HS9000B Series Manual 1.04
PERFORMANCE
10ns (typical)
35ns (typical)
8ns (typical)
10ns (typical)
> 70dB
50ns
1dB difference from ALC enabled
PERFORMANCE
<50 ns
<50 ns
> 70dB
<100 ns
1dB difference from ALC enabled
PERFORMANCE
<20 ns
<20 ns
> 60dB
> 50dB
> 90dB
50 ns
1dB difference from ALC enabled
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COMMENTS
COMMENTS
COMMENTS
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