Chapter 2
31
Operation
Using the Mixers with the 856X Series Spectrum Analyzers
O
p
er
ati
o
n
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
