Agilent Technologies E8362B Service Manual page 154

Theory of Operation
Network Analyzer System Operation
Synthesized Source Group
The built-in synthesized source generates a swept, stepped, or continuous wave (CW)
signal in the frequency ranges as listed in
an internal automatic leveling control (ALC) circuit. In the standard analyzer, a portion of
the source signal is routed to one of the reference receivers (R1 or R2), and fed back to the
source for phase lock. In the Option 080 (frequency offset mode) analyzer, a portion of the
source signal is routed to a frequency offset receiver to provide the phase lock signal. The
maximum output power level of the network analyzer at the test ports is shown in
Table 5-1.
The operation of the source functional group is described in
page 5-6.
Table 5-1 Frequency Range and Maximum Output Power Level
Frequency 10 MHz to
Range 45 MHz
Max. Pwr. Out
+2 dBm
Standard
+2 dBm
Opt. 014
Opt. UNL 0 dBm
0 dBm
Opt. UNL/014
Signal Separation Group
The source signal is separated into a reference path and a test path. The reference signal is
transmitted to the receiver group. The test signal is transmitted through—and reflected
from—the DUT and then is transmitted to the receiver group.
Hardware options added to the analyzer also provide attenuation for the test signals, RF
path switching to allow forward and reverse measurements, and external connections for
the DUT.
Refer to "Signal Separation Group Operation" on page
Receiver Group
The receiver converts the test signal to a 41 kHz intermediate frequency (IF) for signal
processing, retaining both magnitude and phase characteristics. The IF signal is converted
to a digital signal by the digital processing group.
Refer to "Receiver Group Operation" on page
Frequency Offset Group
This group provides the phase lock needed for frequency offset mode (Option 080), where
the source and receivers are tuned to different frequencies.
It also provides reference signal transfer switches in the channel R1 reference path for
automatically adding or removing an external reference mixer in the measurement setup.
Refer to "Frequency Offset Group Operation (Option 080)" on page
5-4
Table 5-1. The source output power is leveled by
45 MHz 10 GHz
to to
10 GHz 20 GHz
+5 dBm +3 dBm
+5 dBm +2 dBm
+3 dBm +1 dBm
+3 dBm
0 dBm
5-21.
PNA Series Microwave Network Analyzers
"Source Group Operation" on
20 GHz 30 GHz
to to
30 GHz 40 GHz
0 dBm −4 dBm
−2 dBm −6 dBm
−2 dBm −6 dBm
−4 dBm −8 dBm
5-16.
5-24.
Service Guide E8364-90026
E8362B, E8363B, E8364B
40 GHz 45 GHz
to to
45 GHz 50 GHz
−5 dBm −10 dBm
−7 dBm −12 dBm
−9 dBm −15 dBm
−11 dBm −17 dBm