10
Installation Note E4411-90051
Replace Chassis Cover
19. Refer to Figure 2. Carefully position the chassis cover on the instrument as shown.
20. Replace the 15 pan head screws (3) and three flathead screws (2) as shown. Torque these screws to
101 N-cm (9 in-lb).
Replace Outer Cover and Rear Frame
21. Refer to Figure 1. Carefully place the spectrum analyzer on the work surface with the front frame
facing down.
22. Replace the instrument outer cover by matching the grill on the bottom of the cover to the bottom of
the analyzer (E401B and E4411B).
23. Replace the instrument outer cover by matching the grill on the side of the case to the fan on the A5
power supply assembly (E441A only).
24. Fit the leading edge of the case completely into the slot on the back of the front frame assembly
(E4411A only).
25. The rear EMI contact grid that clips onto the rear frame can come loose. When replacing the rear
frame, make sure the gasket is in the correct position.
26. Replace the rear frame assembly (6) using the four screws (5) to fasten the rear frame to the
instrument. Torque these screws to 236 N-cm (21 in-lb.).
Verify Analyzer Performance (ESA Models E4401B, E4411B)
• Perform the following performance verification tests found in the “Agilent ESA Spectrum
Analyzers Calibration Guide.”
1. Displayed Average Noise Level
2. Tracking Generator Absolute Amplitude and Vernier Accuracy
3. Tracking Generator Level Flatness
4. Tracking Generator Harmonic Spurious Outputs
5. Tracking Generator Non-Harmonic Spurious Outputs
Verify Analyzer Performance (ESA Model E4411A)
• Perform the following performance verification tests found in the “Agilent ESA-L1500A Spectrum
Analyzer User’s and Calibration Guide.”
1. Tracking Generator Feedthrough
2. Absolute Amplitude, Vernier, and Power Sweep Accuracy
3. Tracking Generator Level Flatness
4. Harmonic Spurious Outputs
5. Non-Harmonic Spurious Outputs