2
INTRODUCTION
Anritsu’s 54100A Network Analyzers operate with
precision waveguide reflectometers available to 110 GHz.
This application note describes how to operate the user-
defined scaling, external leveling, and detector offset
features of the 54100A to make multiplied and frequency
offset measurements accurately.
Basic Setup
Figure 1 shows RF connections with the 54147A.
Option 16 pr15 Vdc bias.
The multipliers are designed to operate with any 12.5 GHz
to 18.75 GHz source providing at least +5 dBm output power
and
−
60 dBc harmonics.
The low input harmonics are required to meet the multi-
plier’s output spurious harmonic specification of
−
55 dBc
(
−
60 dBc typical). Higher source harmonics, such as the
−
20 dBc performance common to existing millimeter fre-
quency extensions, cause significant errors. For example
a
−
20 dBc spurious level has a maximum error of more
than
±
2.0 dB measuring devices with more than 10 dB
return loss.
Figure 2 identifies return loss error magnitude due to source
harmonics. In transmission measurements, sub-harmonics
and crossing spurs from excessive input source harmonics
can make filter tuning impossible.
The 54100A Network Analyzers ulitize broadband detectors.
Accurate device characterization requires that harmonics and
spurious signals be significantly lower than power level of
the test’s fundamental frequency.
54100A SERIES
NETWORK ANALYZER
560-10BX-2
DETECTOR CABLE
TRANSMISSION
DETECTOR
RF IN
>+5 dBm
ANRITSU
REFLECTOMETER
MILLIMETER WAVE
5400-MMXXXX
TEST
PORT
A
B
R
(Option 16)
+15Vdc
DUT
-4.00
-3.00
-2.00
-1.00
0.00
1.00
2.00
3.00
4.00
10 dB
20 dB
30 dB
40 dB
0 dB
P
o
s
s
ib
le
E
rr
o
r
(d
B
)
Source Harmonic
Level
-2
5
dB
-3
0
dB
-3
5
dB
-4
0
dB
-4
5
dB
-50
dB
-60
dB
-60 dB
-5
0 d
B
-4
5 d
B
-4
0 d
B
-3
5 d
B
-3
0 d
B
-2
5 d
B
Figure 1
Basic setup for multiplying the output
frequency of the 54100A
Figure 2
Return Loss accuracy due to source harmonics
Note
The 54100A detector offset function
provides excellent absolute power
measurement capability with the
waveguide detectors. The offset level
is determined using an Anritsu
ML2438A Power Meter.
