Specifications

Problem Fails the Raw Receiver Noise Figure Check:
Solution Check the setup connections:
1. Check the Noise Source ENR Table stored on the instrument. Refer
to the MS462XX Scorpion Measurement Guide (P/N: 10410-00213)
for instructions on how to create a new ENR Table file.
2. Check the Internal ENR Extension Table stored on the instrument.
Refer to Chapter 5, Section 5-8 of this manual, for instructions on
how to create a new Internal ENR Extension Table file.
3. If the instrument fails this test in Wideband External Noise Source
Mode, but passes the Noise Figure Assurance Test, try another
Noise Source.
NOTE
A new Noise Source Vendor ENR Table must be loaded into the instru
-
ment prior to using a new noise source.
4. If the instrument fails this test in Wideband Internal Noise Source
Mode, but passes the test in External Noise Source Mode and the In-
ternal ENR Extension Table is okay, replace the Port 1 Switch Mod-
ule.
Problem Fails the Noise Figure Measurement Confidence Check:
Solution Perform a Back-end Attenuator calibration (refer to Chapter 5).
Replace the Option Module.
Problem Others:
Solution Consult the factory.
When consulting the factory with Noise Figure Measurement problems,
please provide the following:
q
S-parameter data
q
Noise Figure and Gain data
q
Y-Factor data
q
Sketch of a block diagram of the test setup
q
DUT specifications
q
Scorpion instrument settings:
Transmission/Reflection—Frequency, Source Power, IFBW, and
Averaging
Noise Figure—Frequency, DUT Bandwidth, Noise Source Loca
-
tion, Source Power, Noise Figure Averaging
6-26 MS462XX MM
NOISE FIGURE MEASUREMENT PROBLEM TROUBLESHOOTING