Boonton 4500B Peak Power Meter Manual do Utilizador descarregar pdf (Página 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.

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Boonton 4500B Peak Power Meter Manual do Utilizador Página 95