Technical data

85108L System Manual
Operation
System Description
3-4
85110L S-Parameter Test Set Operation
Figure 3-2 shows a detailed diagram of the 85110L test set signal separation, signal routing, and
frequency conversion. This is a fundamentally mixed test set, providing four 20 MHz outputs to the
8510. Placement of a 0 to 70 dB (10 dB/step) attenuator before each mixer provides control of the
signal levels into the mixers while allowing operation at high PORT 1 and PORT 2 signal levels
necessary in many pulsed-RF applications.
The test set has rear panel access links to allow integration of additional test and signal
conditioning equipment in the low-loss main signal paths to the test ports. If your device exhibits
more than about 20 dB of gain, or higher port signal levels are required, refer to “High Power
Measurements” on page 3-30.
Agilent harmonic mixing test sets are designed to work with the normal 10 kHz IF and detectors.
These include the 8514, 8515, 8516, and 8517 coaxial test sets. This 85110 fundamental mixing test
set is designed to work with the wideband IF and detectors. There are applications in which the
85110 can be used with normal IF and detectors. All 85104A-series and 11643-series millimeter test
sets can be configured to operate with the wideband IF and perform the pulse measurement
functions described here.
Figure 3-2 85110L S-Parameter Test Set Signal Flow