Agilent Technologies 8935 Series, Manual

Page: 185 / 343

184 Chapter 8
Performance Tests
RF Generator FM Flatness Performance Test 3
RF Generator FM Flatness
Performance Test 3
The purpose of this test is to verify that the Test Set meets the
specification limits in PTR (Performance Test Record)
Table 9-3, “RF
Generator FM Flatness Test 3 Record,” on page 238 . The FM flatness of
the RF generator is measured directly by the measuring receiver. The
Test Set's internal audio generator provides the modulation source.
NOTE
Two setups are shown below. The first setup can measure signals to 1
GHz. Since the FM generator in the Test Set translates FM in the lower
band directly into the 1.7 to 2 GHz range, testing to 1 GHz is adequate
when verifying a repair. The second setup has a microwave converter
which covers the full measurement range of FM signals to 2 GHz.
Initial Setup
Figure 8-5 Setup for Measurements to 1 GHz
Figure 8-6 Setup for Measurements to 2 GHz Using a Microwave Converter
INPUT 50
Ω
DUPLEX OUT
Measuring Receiver
INPUT 50
Ω
DUPLEX OUT
Measuring Receiver
Microwave Converter
Signal Generator
IF OUTPUT
RF INPUT
LO INPUT
RF OUTPUT