12-4 Service Guide
Theory of Operation 8719ET/20ET/22ET
System Operation 8719ES/20ES/22ES
RF Network Analyzers
The signal separation devices separate the source signal into a reference path and a test
path. They provide attenuation for the source signal, RF path switching to allow forward
and reverse measurements, and external connections for the device under test (DUT). The
signal transmitted through or reflected from the DUT goes to the receiver for comparison
with the reference signal.
The receiver converts the source signal to a 4 kHz intermediate frequency (IF) for signal
processing, retaining both magnitude and phase characteristics. The IF is converted to
digital signals, which are processed into magnitude and phase information. The processed
and formatted data is finally routed to the display and to the GPIB for remote operation.
In addition to the analyzer, the system includes cables for interconnections and calibration
standards for accuracy enhancement.
Table 12-1 Maximum Leveled Power
Model Type Power
dBm
ES Models
8719ES and 8720ES +5
8719ES Option 007 and 8720ES Option 007 +10
8722ES (50 MHz to 20 GHz) −5
(20.0 GHz to 40.05 GHz) −10
8722ES Option 007 (50 MHz to 20 GHz) 0
(20.0 GHz to 40.05 GHz) −5
ET Models
8719ET and 8720ET +10
8722ET (50 MHz to 20 GHz) 0
(20.0 GHz to 40.05 GHz) −5
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