User`s guide

Operation

Using the Mixers with the 856X Series Spectrum Analyzers

Select the Frequency Band

2. Specify unpreselected external mixing by pressing CONFIG, then EXT MXR PRE UNPR until UNPR

is selected.

3. To select a frequency above 18 GHz:

a. Press

AUX CTRL, EXTERNAL MIXER to set the analyzer to external mixer mode.

b. Enter the desired frequency directly using the center-frequency function.

c. Notice in Table 2-1 that some frequencies overlap and fall into two bands. To be sure that the

desired band is selected, refer to Table 2-1 and select the desired frequency band, then use the full

band function to enter this band.

d. In the external mixer menu, press

FULL BAND, then press the step up ⇑ key until the letter

preceding BAND in the active function area corresponds to the desired frequency band.

Table 2-1 External Mixer Frequency Ranges

Frequency

Band

Frequency Range

(GHz)

Mixing

Harmonic

Conversion

Loss

K 18.0 to 26.5 6− 30 dB

A 26.5 to 40.0 8− 30 dB

Q 33.0 to 50.0 10− 30 dB

U 40.0 to 60.0 10− 30 dB

V 50.0 to 75.0 14− 30 dB

E 60.0 to 90.0 16− 30 dB

W 75.0 to 110.0 18− 30 dB

F 90.0 to 140.0 24− 30 dB

D 110.0 to 170.0 30− 30 dB

G 140.0 to 220.0 36− 30 dB

Y 170.0 to 260.0 44− 30 dB

J 220.0 to 325.0 54− 30 dB