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Chapter 2 31
Operation
Using the Mixers with the 856X Series Spectrum Analyzers
Operation
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