Agilent Technologies HP 70910A Podręcznik Użytkownika Pobierz pdf (Strona 77)

Chapter 3 77

Operation

Using 8563A, 8561B, 8560A, or 8560 E/EC-Series Spectrum Analyzers

Operation

NOTE The PRESEL PEAK softkey and its lower-level softkeys are only for use with

preselected external mixers. The preselected configuration must initially be

set up using the EXT MXR PRE UNPR softkey under CONFIG.

CNV LOSS VS FREQ

displays the stored conversion loss for a specific frequency in the

current band. This allows amplitude correction to be entered to

compensate for changes in conversion loss with frequency. To enter a

new value, use the data keys. To change the displayed frequency, use

the step keys. Any changes to the data also affect the mean

conversion loss stored under

AVERAGE CNV LOSS. Table 3-3. on

page 77 shows the number of flatness points for each band and the

default flatness values. To view the correction, connect a 310.7 MHz

signal of a known amplitude (approximately

−30 dBm) to the IF

input and set the analyzer to sweep the associated band.

Table 3-3. Flatness Points and Conversion Losses for Frequencies above 18 GHz

Frequency

Band

Frequency Range (GHz) Number of

Flatness Points

Point

Spacing

Default

Conversion Loss

K 18.0 to 26.5 6 2 GHz 30 dB

A 26.5 to 40.0 8 2 GHz 30 dB

Q 33.0 to 50.0 7 3 GHz 30 dB

U 40.0 to 60.0 6 4 GHz 30 dB

V 50.0 to 75.0 6 5 GHz 30 dB

E 60.0 to 90.0 7 5 GHz 30 dB

W 75.0 to 110.0 8 5 GHz 30 dB

F 90.0 to 140.0 6 10 GHz 30 dB

D 110.0 to 170.0 7 10 GHz 30 dB

G 140.0 to 220.0 9 10 GHz 30 dB

Y 170.0 to 260.0 7 15 GHz 30 dB

J 220.0 to 325.0 8 15 GHz 30 dB

PRESEL PEAK

(available only with preselected external mixing) displays the

preselected external mixer softkey menu, which is described below.

This softkey menu is only available when the

EXT MXR PRE UNPR

softkey under

CONFIG is set to “preselected” mode.

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