Boonton 4500B Peak Power Meter Manual do Utilizador descarregar pdf (Página 66)

Boonton 4500B RF Peak Power Analyzer

Getting Started

3-32

MENU ITEM EXERCISE

CHAN (continued)

Chan 1 > Vert Center Press the Chan 1 > Vert Center menu key. Use any of the data entry controls to shift the vertical

center of the display to correspond to power levels of -10, 0 and +10 dBm. Observe the position of

the display at each setting and note that the VertCenter parameter changes to match the selected

level. Note also that the power readings do not change and the display is moved without recapture

of data.

Chan 1 > Calibration Used at the start of this procedure to calibrate the sensor.

Chan 1 > Exten > Press the Chan 1 > Exten menu key to access the Extensions submenu (Figure 3-6).

Chan 1 > Exten Press the Chan 1 > Exten >Units menu key to see the Units selection menu. The top menu box

> Units displays the current units of the channel. To change the units to Watts, Volts, dBV, dBmV or

dBuV, press the corresponding menu key. The selected unit will appear in the top menu box

location. Return the units to dBm before proceeding to the next step.

Chan 1 > Exten Press the Chan 1 > Exten > Corrections menu key to see the Corrections sub-menu.

> Corrections

Chan 1 > Exten Press the Chan 1 > Exten > Corrections > dB Offset menu key to display or enter the dB Offset

>Corrections vertically on the display (Positive offsets move the CCDF up; negative offsets move it down).

> dB Offset Unlike Chan 1 > Vert Center above, dB offset does affect the power readings.

Note In practice, dB Offset is used to compensate for attenuators or amplifiers inserted between the sensor and

the device under test. Freq CF is used to compensate for losses in cables, adapters, switches and other line

equipment inserted between the sensor and the calibrator output, or between the sensor and the device

under test, but not both.

Chan 1 > Exten Press the Chan 1 > Exten >Corrections > FreqCF menu key to display or enter a frequency

>Corrections cal-factor. If a value is entered it will temporarily override the interpolated value and change

> FreqCF Meas > Freq CH1 Meas > Freq CH1 or if

the 4500B is powered to Standby or OFF, the interpolated value will be restored.

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Boonton 4500B Peak Power Meter Manual do Utilizador Página 66