Boonton 4500B Peak Power Meter - Manual (Page 95)

Boonton 4500B RF Peak Power Analyzer
Operation 4-23
Table 4-4B. Chan # > Extensions > Define Pulse > Submenu (continued)
Menu Item Function
(Type) Selections (SCPI cmd)
Mesial
Pulse Sets the percentage of pulse amplitude
(Numeric) Continuous Range defining the mesial.
The mesial is normally defined as 50 % of the
pulse top level amplitude. The range is from
10% to 90%.
SENSe[1|2|3|4|6|7]:PULSe:MESIal
<10.00 to 90.00> (percent)
Proximal Pulse Sets the percentage of pulse amplitude
(Numeric) Continuous Range defining the proximal.
The proximal is normally defined as 10% of
the pulse top level amplitude. The range is
from 0.10% to 30%.
SENSe[1|2|3|4|6|7]:PULSe:PROXimal
<0.10 to 30.00> (percent)
Pulse Units Pulse Selects voltage or power amplitude
(Toggle) Volts, Watts interpretation of the Distal, Mesial
and Proximal levels for automatic
measurements
SENSe[1|2|3|4|6|7]:PULSe:UNIT
{WATTS, VOLTS}
Figure 4-16. Chan # >
Exten > Def
Note
The distal, mesial and proximal levels are set in percentage of the waveform amplitude. If Distal = 90%
Mesial = 50% Proximal = 10% and the power waveform is converted to voltage (Volts), the risetime
measured will correspond to the risetime measured by a conventional oscilloscope. Thus, it bears the
familiar relationship between risetime and bandwidth for simple systems. Without the conversion, (Watts)
the equivalent levels are Distal = 81%, Mesial = 25% and Proximal = 1%. These values derive from the
proportionality between power and voltage squared. With Pulse Units set to Volts, the automeasure system
will assume the level percentages relate to a voltage waveform; and conversely, a power waveform when
set to Watts. This is without regard to the units of the waveform actually displayed. For the automatic
measurements to function properly, the distal must be greater than the proximal.