Agilent Technologies PSA Series Installation and operation manual

Installation Note
Part Number E4440-90254
Printed in USA August 2004
Agilent PSA Series Spectrum Analyzers
Switchable Microwave Preselector Bypass
Option 123

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 shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the furnishing, performance, or use
of this material.
© Copyright 2004 Agilent Technologies, Inc.

Installation Note E4440-90254 3
Switchable Microwave Preselector Bypass Installation Kit
Switchable Microwave Preselector Bypass Installation Kit
Introduction
This installation note explains how to install the Switchable Microwave Preselector
Bypass into newer instruments that have the serial prefix listed above. These
instruments already contain the proper Front End Driver assembly required to support
this retrofit kit. There is another kit, Option 423, that is designed for earlier
instruments that require the latest Front End Driver assembly.
Because the mixer in this kit requires the same SLODA LO output that the external
mixing option AYZ requires, the two options cannot be installed at the same time.
The retrofit adds a switchable alternate signal path when the analyzer start frequency is
above 3.05GHz. This alternate path bypasses the preselector filter and mixer in the
normal highband path. The advantage of bypassing the preselector is that the
preselector filter will drift with time and temperature and will cause small amplitude
errors.
When the preselector is bypassed, images, multiples and out of band responses will
appear on the analyzer display since there is no longer a bandpass filter present to limit
the input frequency range of the analyzer. Therefore, the display may show many signal
responses even though only one response is the true signal. Since the preselector can be
switched in or out easily, it is possible to find a signal in preselected mode and tune to it,
then switch the preselector out and measure it.
NOTE This option is licensed for one instrument model number/serial number
combination. The license key will only install on the designated
instrument.
Products Affected: PSA E4440A
PSA E4443A
PSA E4445A
Serial Numbers: US4430 / US9999
MY4430 / MY9999
To Be Performed By: (X) Agilent Service Center
(X) Personnel Qualified by Agilent
( ) Customer
Estimated Installation Time:
Estimated Adjustment and Verification Time: 4 Hours 4.5 Hours

4Installation Note E4440-90254
Switchable Microwave Preselector Bypass Installation Kit
Contents
Quantity Description Agilent Part
Number
1 Installation Note This note
1 Option Upgrade Entitlement Certificate ---
1 Dual mixer 5086-7749
1 Microwave Switch/Bracket Assembly
Includes: 2-microwave switches, standoffs, wire harness
and mounting bracket.
N/A
1 W80, Cable, semi-rigid, Input Atten to SW1 E4440-20090
1 W81, Cable, semi-rigid, SW1 to RYTHM E4440-20091
1 W82, Cable, semi-rigid, SW1 to Mixer input. E4440-20092
1 W84, Cable, Semi-rigid, Mixer Out to SW2 E4440-60298
1 W86, Cable (10), coax, 3rd converter to SW2 E4440-60373
1 W87, Cable (2), coax, RYTHM to SW2 E4440-60370
1 W88, Cable, semi-rigid, SLODA LO Out to cable W83 E4440-20087
2 Cable tie .062D .09W 1400-0294
5 Screw, M3 X 0.5 8 MM-LG 0515-0372
1 50 Ohm Load (SMA) 1810-0118
1 Specifications Guide ---
1User’sGuide ---

Installation Note E4440-90254 5
Switchable Microwave Preselector Bypass Installation Kit
Tools Required
❏T-20 Torx driver
❏T-10 Torx driver
❏5/16-inch open end wrench/torque wrench
❏1/4-inch open end wrench
❏PSA Series Performance Tests and Adjustment Software, E.01.00 or later
❏Test equipment supported by the PSA Series Performance Tests and Adjustment
Software.
❏PSA Series Spectrum Analyzer and Service Guide. This manual is available as part of
the E4440AU, E4443AU, or E4445AU Option OBW kits.
❏Microsoft Windows based personnel computer
❏Windows 2000, Windows XP Professional
❏Firmware A.0 6.00 or later. Download the latest revision form
http://www.agilent.com/find/psa_firmware, or order the Firmware Update kit.
Depending on your model number, the firmware update kit is ordered as: Order
E444xAU (Qty.1) Option UE2 (Qty. 1), where the “x”is the last digit of the model
number. For example: E4440AU option UE2.

6Installation Note E4440-90254
Installation Procedure
Installation Procedure
Install Firmware A.06.00 or Greater if Needed
1. Press System, More, Show System. The Firmware Revision needs to be A.06.00 or later.
2. If the firmware needs to be updated, do the following:
Download the PSA Update Program and the PSA Firmware Procedure from
http://www.agilent.com/find/psa_firmware. Follow the directions to install the
firmware.
Alternate Method:
Install the Firmware Update Kit E4440AU Option UE2. Follow the directions in the
kit.
Before you begin the kit installation:
The instrument should be fully functional and pass all of the power on align tests. If an
alignment test fails, either note the failure and go on with the kit installation or repair
the problem now. Since the following installation involves removing and replacing cables
and removing and reinstalling major assemblies, you must be aware of the instrument
status before you begin the kit installation.

Installation Note E4440-90254 7
Installation Procedure
Remove the Outer Case
CAUTION If the instrument is placed on its face during any of the following
procedures, be sure to use a soft surface or soft cloth to avoid damage to
the front panel, keys, or input connector.
1. Disconnect the instrument from ac power.
2. Refer to Figure 1. Remove the two handles on the sides of the instrument as shown.
Use the T-20 driver to loosen the screws that attach each handle (1). Remove the
handles.
3. Remove the four bottom feet (2). Lift up on the tabs on the feet, and slide the feet in
the direction indicated by the arrows.
4. Remove the four screws (3) that hold the rear feet (4) in place.
5. Pull the instrument cover (5) off toward the rear of the instrument.
Figure 1 Instrument Outer Case Removal

8Installation Note E4440-90254
Installation Procedure
Remove the Top Brace
1. Refer to Figure 2. Use the T-10 driver to remove the top screws (3) (one screw is
under the security label), and the side screws (2) attaching the top brace (1) to the
deck.
2. Remove the top brace from the deck.
Figure 2 Top Brace Removal

Installation Note E4440-90254 9
Installation Procedure
Remove the Front Frame
1. Refer to Figure 3. Using the T-10 driver, remove the 7 screws
(1) that attach the front frame assembly (2) to the deck.
2. Pull the front frame off of the deck until it is disengaged from the disc drive.
3. Using a 9/16”socket drive, remove the nut securing the Ext Trigger Input BNC
connector. Take care to not scratch the front dress panel.
4. Disconnect the ribbon cable (3) from the A2 front panel interface board. Pull the
coaxial cable (4) from the front frame and unclip from the two cable clamps.
5. Lift the front frame assembly away from the deck.
Figure 3 Front Frame Assembly Removal

10 Installation Note E4440-90254
Installation Procedure
Installing the Retrofit Kit
1. Locate the input attenuators near the RF input and remove the W8, E4440-20068
rigid cable that connects the two attenuators. Refer to Figure 4. This cable will be
reused later.
Figure 4 Cable Locations
2. Locate the switch/bracket assembly in the retrofit kit (Figure 5) and place it over the
attenuators as shown in Figure 6. Secure the switch/bracket assembly to the
attenuator bracket with the 0515-0372 screws provided in the kit.
Figure 5 Switch/Bracket Assembly

Installation Note E4440-90254 11
Installation Procedure
3. Locate the Dual Mixer in the kit. Look at the wire harness attached to the
switch/bracket assembly and locate the grey and violet wires.
4. Refer to Figure 7 to determine how the Dual Mixer will attach, but do not attach the
mixer yet. Connect the grey wire with the push on connector to the Dual Mixer bias
pin. Connect the violet wire with the push on connector to the Pin 7 SW on the Dual
Mixer.
Figure 6 Mixer and Cable Locations

12 Installation Note E4440-90254
Installation Procedure
5. Refer to Figure 7. Attach the Dual Mixer to the end of the switch bracket using two of
the screws in the kit. Before inserting the top screw, locate the black wire with the
ground lug that is part of the switch harness. Place the ground lug between the screw
head and the mixer body. Torque the mounting screws to 9 in-lbs.
Figure 7 Mixer Installation
6. Refer to Figure 4. Remove the W9, E4440-20069 rigid cable from the RYTHM to the
attenuator. This cable can be discarded.

Installation Note E4440-90254 13
Installation Procedure
7. Locate the W80, E4440-20090 rigid cable in the kit. Refer to Figure 8. Attach one end
of the cable to the bottom switch port C, and the other end to theattenuator connector
where you just removed W9. Torque to 10 in-lbs.
Figure 8 Bottom Switch Cables

14 Installation Note E4440-90254
Installation Procedure
8. Refer to Figure 9. Re attach the W8 rigid cable between the two attenuators. This is
the cable you removed in step 1. Torque to 10 in-lbs.
Figure 9 Cable Locations

Installation Note E4440-90254 15
Installation Procedure
Figure 10 Mixer and Cable Locations
9. Locate the W82 rigid cable in the kit. Refer to Figure 9 and Figure 10. This cable will
connect between the bottom switch Port 1, and Dual Mixer port “HI BAND IN J3”.
The cable must be routed between the switches. To do this, make sure the flat portion
of the connector nut is positioned so the end of the cable will fit between the switches.
Torque the cable to 10 in-lbs.

16 Installation Note E4440-90254
Installation Procedure
10.Locate the W81 rigid cable in the kit. Refer to Figure 9 and Figure 11. This cable will
connect between bottom switch Port 2, and the RYTHM port.
Figure 11 W81 Location

Installation Note E4440-90254 17
Installation Procedure
11.Refer to Figure 12. On the instrument, locate the flexible coax “10”cable that
connects between the A10 Third Converter J1 and RYTHM. Remove the cable from
Third Converter J1.
Figure 12 Top View
12.Remove the screw from the cable hold down rod on the mid web to allow the “10”cable
and other cables to be free.
13.In order to remove the RYTHM end of the cable, and replace the cable, several board
assemblies must be removed. Please note the position and routing of all cables. All of
the flexible coax cables are color coded, but the ribbon cables are not.
14.Remove the Front End Driver being careful to avoid damaging the ribbon cables.
15.Remove the Synthesizer assembly after removing the rigid cable and the two
retaining screws.
16.Remove the Reference assembly.

18 Installation Note E4440-90254
Installation Procedure
17.Locate the “10”cable again, and take note of the cable routing. Refer to Figure 13.
Using needle nose pliers, carefully grab the body of the “10”cable smb connector and
gently rock the smb connector free of the RYTHM. Discard the cable.
Figure 13 RYTHM SMB Connector
18.Locate the W87 flexible coax in the kit. This cable has a “2”color code and connects
from port 2 of the top switch to the smb connector on RYTHM. Route the SMA end of
the cable under the W80 semi-rigid cable, and connect it to port 2 of the top switch.
Torque to 10 in lbs. Route the cable next to the RF section sheet metal and directly to
the RYTHM. Carefully align the SMB end of the cable with the RYTHM connector by
looking through the hole in the chassis. Press the SMB connector on.
19.Reinstall the A13 Front End Driver, Synthesizer Assembly and the Reference
Assembly. Assure all cables are routed correctly.
20.Locate the W86 flexible coax cable in the kit. This cable has a 10 color code on one end
and a “C”on the other end. Refer to Figure 12. Route the SMA end of the cable under
the W80 semi-rigid cable, and connect it to the center port of the top switch. Torque to
10 in lbs. Attach the other end of the cable to the A10 Third Converter J1 connector.
NOTE The shrink-wrapped ferrite beads on the cable can be moved slightly to
aid cable routing.

Installation Note E4440-90254 19
Installation Procedure
21.Locate the W84 flexible cable in the kit. This cable has a right-angle SMA connector
on one end. Refer to Figure 9 and Figure 10. Route the end of the cable with the
straight SMA connector under the W80 semi-rigid cable, and connect it to port 1 of
the top switch. Route the cable under the attenuator and to the Dual Mixer “OUT”J5
port. Connect the cable being careful that the right-angle connector is clear of the
cooling fan. Torque the connectors to 10 in-lbs.
22.Refer to Figure 14. Locate the SLODA (LO distribution amplifier) in the RF section.
Remove the 50 ohm load from the 1st LO OUT port.
23.Refer to Figure 7. Place the 50 ohm load on the Dual Mixer 3.9107GHz OUT port.
24.Locate the 50 ohm load in the kit and install it on the Dual Mixer, LOW BAND IN
port.
25.Locate the W88 rigid cable in the kit. Refer to Figure 14. Attach one end to the LO
OUT port of the SLODA. The other must lay against the fan near the upper fan
mounting hole.
Figure 14 RF Section

20 Installation Note E4440-90254
Installation Procedure
26.Locate the W83 rigid cable in the kit. Refer to Figure 15. Attach one end to the Dual
Mixer at the “LO IN MIXER BIAS”port. The other end attaches to the W88 cable
installed in the previous step. Refer to Figure16. Assure that when the two cables are
joined that the connection lays against the fan near the upper fan mounting hole. You
may need to loosen the other end of W88 or W83 to achieve the proper fit. Use both
the ¼-inch and 5/16-inch open-end wrenches to connect the two cables.
Figure 15 W83 Cable