Boonton 4500B Peak Power Meter Instrukcja Użytkownika Pobierz pdf (Strona 93)

Boonton 4500B RF Peak Power Analyzer

Operation

4-21

Table 4-4A. Chan # > Extensions > Corrections > Submenu

Menu Item Function

(Type) Selections (SCPI cmd)

dB Offset Pulse, Mod & Stat Set the value of the input attenuator for channel 1 or 2

(Numeric) Continuous Range:

-99.99 to +99.99 dB This function is used to account for

attenuator(s) or amplifier(s) inserted at the



levels to the input range of the instrument.

The value for offset correction factor is

always entered in dB but is correctly applied

to the signal level for all measurement units.

The offset entered in this function will also

correct the internal trigger level value.

To display the un-attenuated signal power,



of the data entry controls to input the known

value of the offset attenuator.

If the exact value of the attenuator is

unknown, determine the value by connecting

the sensor with the attenuator to the calibrator

output and following these steps:

1. Use Cal > Cal Mode t

See Section 4-16.

2. Set the calibrator output to +20 dBm

using the Calibrator > Set Level menu

key and the keypad.

3. On the top level menu set Measure Mode

4. to Modulated.

5. Set Chan # > Extensions >Units to dBm.

6. Select Chan # > Extensions >

Corrections > dB Offset and use the spin

knob to adjust the dB Offset parameter Figure 4-15

until the Avg Pwr reads 20.00 dBm. The Chan # > Corrections

exact value of the attenuator is indicated

by the dB Offset parameter.

SENSe[1|2]:CORRection:OFFSet < -99.99 to 99.99> (dB)

1 2 ... 88 89 90 91 92 93 94 95 96 97 98 ... 371 372

Brak uwag

Boonton 4500B Peak Power Meter Instrukcja Użytkownika Strona 93