Agilent Technologies E4411-60019 Installation and operation manual

Part Number E4411-90045 Supersedes October 1998
Printed in USA May 2000
Installation Note
Agilent Technologies ESA Spectrum Analyzer
Gasket Upgrade Kit
Kit Number E4411-60019

Notice.
The information contained in this document is subject to change without notice.
Agilent Technologies makes no warranty of any kind with regard to this material, including but not limited
to, the implied warranties of merchantability and fitness for a particular purpose. Agilent Technologies
shallnotbeliableforerrorscontainedhereinorforincidentalorconsequentialdamagesinconnectionwith
the furnishing, performance, or use of this material.
© Copyright 1998, 1999, 2000 Agilent Technologies, Inc.

Installation Note E4411-90045 3
E4411-60019
Introduction
This kit is intended for customers whose ESA spectrum analyzers have accumulated dust particles or
cloudiness on the lens. It provides gaskets for placement around the lens to reduce further
contamination. Also, a new lens/keypad assembly is required for this upgrade and must be ordered
separately.
Installation Kit Parts List
Table 1 Parts Kit E4411-60019 Contents
NOTE This kit does not include a lens/keypad assembly. Because of variations in these
assemblies, it has been left up to the person performing the upgrade to order the
appropriate lens/keypad assembly for the instrument. Refer to the instrument
service guide for the applicable part number.
Product Affected: . . . . . . . . . . . . . . . . . . . . . . . . ESA Spectrum Analyzers
Serial Numbers: . . . . . . . . . . . . . . . . . . . . . . . . All
Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All
To Be Performed By: . . . . . . . . . . . . . . . . . . . . . (X) Agilent Technologies Service Center
( ) Personnel Qualified by Agilent Technologies
( ) Customer
Estimated Installation Time: . . . . . . . . . . . . . . 0.5 hour
Estimated Verification Time: . . . . . . . . . . . . . . 0.5 hour
Item Quantity Description Part Number
1 2 Long Gaskets 6.3 in. 8160–0959
2 2 Short Gaskets 4.4 in. 8160–0960
3 1 Installation Note E4411-90045

4 Installation Note E4411-90045
Tools Required
Figure 1 TORX Tool
WARNING Opening covers or removing parts is likely to expose dangerous voltages.
Disconnect the product from all voltage sources before opening covers.
WARNING The spectrum analyzer contains potentially hazardous voltages. Failure
to heed the safety precautions can result in severe or fatal injury.
CAUTION Electrostatic discharge (ESD) can damage or destroy electronic components. All
work on electronic assemblies should be performed at a static-safe workstation.
Refer to the documentation that pertains to your instrument for information
about static-safe workstations and ordering static-safe accessories.
Description Part Number
TORX Hand Driver — Size T10 8710-1623
TORX Hand Driver — Size T15 8710-1622

Installation Note E4411-90045 5
Procedure
Removing the Outer Case
1. Disconnect the spectrum analyzer from ac power.
2. Carefully place the analyzer on the work surface with the front frame facing down.
Refer to Figure 2 for steps 3 and 4.
3. Remove the four screws (1) that hold the rear frame (2) and outer case (4) in place.
4. Pull the instrument outer case and rear frame off toward the rear of the instrument.
CAUTION The rear EMI contact grid (3) that clips onto the rear panel can come loose. Note
the correct position to reattach the gasket.
Figure 2 Outer Case, Rear Frame Removal

6 Installation Note E4411-90045
Removing the Front Frame
The front frame assembly can be extended from the instrument without detaching any connections.
Refer to Figure 3 for steps 1 through 3.
1. With the instrument still on its face, remove the two screws (5) on the bottom side of the instrument
that secure the front frame to the RF assembly.
2. Place the instrument with the top side facing up and remove the remaining three screws (1) that
secure the front frame to the inner shield. Remove the two screws (2) that secure the front frame
subpanel to the chassis.
3. Slide the front frame (4) forward until it catches on the tabs (3) on the sides of the chassis.
Figure 3 Front Frame Assembly Removal

Installation Note E4411-90045 7
Refer to Figure 4 for steps 4 through 6.
4. Disconnect the ribbon cable (1) from the front panel interface board.
5. Carefully pull the sides of the front frame subpanel away from the chassis and over the tabs.
6. Slide the front frame forward to disengage from the chassis assembly.
Figure 4 Front Frame Ribbon Cable

8 Installation Note E4411-90045
Removing the Display
CAUTION The display and lens surfaces are very easily scratched. Avoid touching them with
your bare hands or other objects.
1. Place the front frame assembly face down on the work surface.
Refer to Figure 5 for steps 2 through 5.
2. Disconnect the two-wire backlight cable (1) from the front panel interface board.
CAUTION The W3 display ribbon cable connector (2) is delicate. With a small screwdriver or
similar tool, gently push the lock tabs out from the back of the connector.
Excessive force on the locking tab will brake the retaining clips, and if broken,
board replacement will be necessary.
3. Disconnect the W3 display ribbon cable (2) from the front panel interface board. The ribbon cable
connector has a lock that needs to be slid out before removing the ribbon cable.
4. Remove the four screws (3) securing the display bracket (4) to the front frame.
5. Carefully lift the display and bracket out of the front frame assembly and put it in a safe place.
Figure 5 Display Removal

Installation Note E4411-90045 9
Installing the EMI Gaskets
1. Refer to Figure 6. Use a pair of needle-nose pliers to remove the metal fingers located in three
places on the front frame around the lens opening.
NOTE The fingers are held in place with adhesive and some force may be required to
remove them.
Figure 6 Metal Finger Location

10 Installation Note E4411-90045
Refer to Figure 7 for steps 2 through 6.
2. Locate the two long (8160–0959) and two short (8160–0960) EMI foam gaskets.
3. Install one of the short gaskets, along the left or right edge of the opening, approximately 1 mm
from the edge, as shown in the figure. Use the following steps:
a. Remove the protective paper backing from the gasket strip, to expose the self-stick adhesive.
b. On the inside of the front frame, center and align the gasket along the edge of the opening. (The
short gaskets should have approximately equal amounts of overlap at the top and bottom of the
opening.)
c. Firmly press along the length of the gasket to adhere it to the frame.
4. Repeat steps 3a through 3c with the remaining short gasket along the opposite edge of the opening.
5. Repeat steps 3a through 3c to install one of the long gaskets, along the top or bottom edge of the
opening as shown in the figure.
NOTE Make sure that the long gaskets touch the ends of the short gaskets. This is
necessary to create an airtight seal around the inner plastic lens and the LCD
display. The seal minimizes particulate contamination that may cloud the lens.
6. Repeat steps 3a through 3c with the remaining long gasket along the opposite edge of the opening.
NOTE The long gaskets will either partially or completely cover holes in the subpanel
through which rubber front panel alignment posts protrude. This is normal and
will not adversely affect the function of the gasket.
Figure 7 Gasket Placement

Installation Note E4411-90045 11
Removing and Replacing the Lens
Due to the nature of the inner surface of the lens, it is not readily cleanable, and therefore it is
recommended that you replace rather than attempt to clean the lens.
NOTE If the gasket is being added as a preventive measure and the lens is not impaired,
go to “Reinstalling the Display” on page 12.
NOTE If the lens is scratched or damaged, you will need to order a new lens and keypad
assembly for the repair.
Removing the Keypad/Flex Circuit
1. Remove the volume knob and the RPG knob by pulling straight off of the control shafts.
NOTE There is a water seal gasket placed around the volume control shaft that will need
to be repositioned during the replacement procedure.
Refer to Figure 8 for steps 2 and 3.
2. Remove the six screws (1) securing the subpanel (2) to the front frame (5). Lift the subpanel, with
the front panel interface board attached, from the front frame assembly.
3. Lift out the flex circuit (3) and the main keypad (4). Be careful to avoid touching the keypad contacts
with your fingers.
Figure 8 Front Frame Subpanel Removal

12 Installation Note E4411-90045
Removing the Lens/Keypad Assembly
1. The lens/keypad assembly is secured in place, with adhesive instead of hardware. To remove it from
the front frame, apply pressure along the edges of the lens from the front side until it pops out.
Replacing the Lens/Keypad Assembly
1. Remove the paper covering the adhesive on the lens/keypad assembly.
2. Carefully fit the new lens/keypad assembly into place in the front frame. Press along the edges of
the lens from the inside to adhere it to the front frame.
3. Make sure the inside of the lens is clean from contaminants such as lint and fingerprints before
proceeding.
Replacing the Keypad/Flex Circuit
1. Place the main keypad (4) so it lays flat in the front frame (5). Be careful to avoid touching the
keypad contacts with your fingers.
Refer to Figure 8 for steps 2 through 5.
2. Lay in the flex circuit (3) so it aligns with the pegs on the front frame and lays flat. A small amount
of circuit ripple will be unavoidable.
3. Place the subpanel (2), with the display and the front panel interface board attached, on top of the
flex circuit, taking care to not pinch the flex circuit ribbon cable underneath.
4. Ensure that the water seal gasket on the volume control shaft is correctly positioned.
5. Ensure that the flex circuit is aligned with the pegs and not visible through the screw holes in the
subpanel. Replace the six screws that secure the subpanel to the front frame. Replace the four
screws that secure the display to the front frame. Torque to 101 N/cm (9 inch pounds).
6. Press the volume and RPG knobs onto their control shafts.
Reinstalling the Display
NOTE If the LCD display requires cleaning, Isopropyl Alcohol on a soft wipe may be used
to gently wipe the glass lens of the display.
1. Place the display (4) into the front frame assembly. Make sure that the cables are not pinched
between the display and the front frame.
Refer to Figure 5 for steps 2 through 4.
2. Replace the four screws (3) that secure the display bracket to the front frame. Torque to 101 N/cm
(9-inch pounds).
CAUTION The W3 display ribbon cable connector (2) is delicate. Use a small screwdriver or
similar tool to push the lock tabs into the back of the connector.
3. Connect the display ribbon cable (2) to the front panel interface board. Make sure that the display
ribbon cable is fully inserted into the connector body and aligned straight in the connector before
pressing the locking bar into place.
TIP An easy way to insert this delicate cable into the connector is to place your finger
on the cable, in the center of the LCD display, and gently slide the cable away from
the connector until they align.

Installation Note E4411-90045 13
Gently slide the cable toward the connector providing guidance with the other
hand as necessary until the cable end slips into the connector
Ensure the cable end is seated completely in the connector, and is square within
the connector.
Continue to hold the cable in place with your finger, and with the other hand
gently press the locking tab into place.
NOTE If you experience display problems, check this connection.
4. Connect the backlight cable (1) to the front panel interface board.
Replacing the Front Frame
1. Refer to Figure 3. Align the front frame subpanel rails with the chassis.
2. Refer to Figure 4. Connect the ribbon cable (1) to the front frame assembly.
3. Carefully slide the front frame toward the chassis, assuring the ribbon cable is not pinched between
assemblies, and the RF input connector lines up correctly with the opening in the front frame.
NOTE Make sure the water seal is still in place around the input connector (and around
the tracking generator connector if the instrument has Option 1DN or 1DQ)
before reinstalling the front frame assembly.
4. Carefully place the spectrum analyzer on the work surface with the front frame facing down.
5. Refer to Figure 3. Replace the seven screws that secure the front frame to the chassis. Torque to
101 N/cm (9-inch pounds).
Replacing Outer Case
1. Replace the instrument outer case by matching the grill on the side of the case to the fan on the
power supply assembly.
2. Fit the leading edge of the case completely into the slot on the back of the front frame assembly.
Refer to Figure 2 for steps 3 through 5.
3. Replace the rear frame assembly (2) on the instrument.
NOTE The rear EMI gasket (3) that clips onto the rear panel can come loose. When
replacing the outer case, make sure the gasket is in the correct position.
In some cases, the rear EMI gasket may be misaligned, or the fingers may not be
bent far enough to make proper contact. Poor contact will negatively impact the
EMI performance of the instrument.
4. Check to make sure that all fingers of the rear EMI gasket (3) contact the rear panels of the
boards/blank panels. Each pair of fingers should contact the faceplate to its left and right,
respectively.
If the contacts of the rear EMI gasket are misaligned, remove the rear frame, loosen all the rear
card cage screws, power supply screw, IF screws, and option card screws, and move the whole group
of parts in the direction needed to ensure that the fingers of the gasket make contact with the rear
panels.
If the panels are properly aligned, but the EMI fingers do not reach the panels, remove the rear
frame and bend the fingers farther out to ensure that they make contact with the rear panels.

14 Installation Note E4411-90045
5. Use the four screws (1) to fasten the rear frame to the instrument. Torque to 247 N/cm (21-inch
pounds).
After a Spectrum Analyzer Repair
After the spectrum analyzer assemblies have been repaired or replaced, perform the related
adjustments and performance verification tests. Refer to the Adjustment and Tests for Replacement or
Repaired Assemblies in the Post-Repair Procedures chapter of the service guide for the related
adjustments and performance verification tests required for each assembly.