Agilent Technologies ESA-L1500A Quick start guide

Part Number E4401-90039 Supersedes: December 1997
Printed in USA May 2000
Installation Note
Agilent Technologies ESA-L1500A or Agilent
Technologies E4411A Spectrum Analyzer
GPIB/Parallel (Option A4H) Kit Number E4401-60053
RS-232/Parallel (Option 1AX) Kit Number E4401-60054
IF, Sweep, and Video Output (Option A4J)
Kit Number E4401-60055

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 1997-2000 Agilent Technologies Company

Installation Note E4401-90039 3
GPIB/Parallel (Option A4H) Kit Number E4401-60053
RS-232/Parallel (Option 1AX) Kit Number E4401-60054
IF, Sweep, and Video Output (Option A4J)
Kit Number E4401-60055
Introduction
This kit contains the parts and instructions to install GPIB/Parallel Option, or RS-232/Parallel Option,
and/or IF, Sweep, and Video Output Option.
Installation Kit Parts List
Table 1 Parts Kit Option A4H GPIB/Parallel Parts Kit E4401-60053 Contents
Product Affected: . . . . . . . . . . . . . . . . . . . . . . . . . E4411A or ESA-L1500A
Serial Numbers: . . . . . . . . . . . . . . . . . . . . . . . . . . . US00000000/US99999999
Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A4H, 1AX, and A4J
To Be Performed By: . . . . . . . . . . . . . . . . . . . . . . (X) Service Center
(X) Personnel Qualified by Agilent Technologies
(X) Customer
Estimated Installation Time: . . . . . . . . . . . . . . . . 0.5 Hours
Estimated Verification Time: . . . . . . . . . . . . . . . . . 0.5 Hours
Item Quantity Description Part Number
1 1 Board Assembly GPIB/Parallel E4401-60013
2 1 ESA-L1500A Programmer’s Guide E4411-90003
3 1 Screw M3 x 8-mm (crest washer - pan head - TORX) 0515-0372
4 1 Protective Cap, 25-pin female 1252-4690
5 1 Protective Cap, 24-pin female 1252-5007
6 1 Installation Note E4401-90039

4 Installation Note E4401-90039
Table 2 Parts Kit Option RS-232/Parallel Parts Kit E4401-60054 Contents
Table 3 Parts Kit Option A4J IF, Sweep, and Video Output Kit
E4401-60055 Contents
Tools Required
❏T-8 TORX screwdriver
❏T-10 TORX screwdriver
❏T-15 TORX screwdriver
❏Oscilloscope
❏50 W termination
❏Torque driver (Torque driver requirements are shown in Table 4.)
To avoid potential RFI leakage and prevent connector damage, tighten screws and RF coax cable
connectors to the following torque limits
Table 4 Torque Settings
Item Quantity Description Part Number
1 1 Board Assembly RS-232/Parallel E4401-60014
2 1 ESA-L1500A Programmer’s Guide E4411-90003
3 1 Screw M3 x 8-mm (crest washer - pan head - TORX) 0515-0372
4 1 Protective Cap, 25-pin female 1252-4690
5 1 Protective Cap, 9-pin male 1252-4697
6 1 Installation Note E4401-90039
Item Quantity Description Part Number
1 1 Board Assembly GPIB/Parallel E4401-60011
2 1 Screw M3 x 8-mm (crest washer - pan head - TORX) 0515-0372
3 1 Installation Note E4401-90039
Item Torque in.-lbs
SMA Connector 8.5
SMC Connector 5.5
3-mm, T-8 TORX screws 9.0
3.5-mm, T-10 TORX screws 14
4-mm, T-15 TORX screws 21
Pozidrive Screws 14

Installation Note E4401-90039 5
WARNING Before you disassemble the instrument, turn the power switch OFF and
unplug the instrument. Failure to unplug the instrument can result in
personal 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.

6 Installation Note E4401-90039
Installation Procedure
Remove Instrument Cover
1. Disconnect the spectrum analyzer from ac power.
2. Carefully place the analyzer on the work surface with the front frame facing down.
3. Remove the four screws (1) that hold the rear frame (2) and outer case in place. Refer to Figure 1.
4. Pull the instrument outer case and rear frame off towards 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. Refer to Figure 1.

Installation Note E4401-90039 7
Figure 1 Outer Case, Rear Frame Removal

8 Installation Note E4401-90039
Removal of Inner Shield
5. Remove the instrument outer case. Refer to the “Instrument Outer Case” removal procedure.
6. Remove the 16 screws (1) and (2) attaching the inner shield to the chassis (15 screws if you have the
tracking generator option). Refer to Figure 2.
7. The inner shield can now be removed from the chassis.
Figure 2 Inner Shield Removal

Installation Note E4401-90039 9
8. Loosen but do not remove all of the screws securing the boards and blank plates at the rear of the
chassis.
9. Remove the vibration support bar at the top rear of the instrument by pinching in the ends of the
bar and rotating upward. The support can be removed by sliding it out of the holes in each assembly.
Refer to Figure 3.
CAUTION The vibration support can be broken if it is forced. Remove with care.
Figure 3 Vibration Support

10 Installation Note E4401-90039
10.Refer to Figure 4 to locate the where the new I/O assembly will go.
11.Remove the single screw (1) securing the I/O assembly or blank panel to the chassis.
Refer to Figure 3.
12.Carefully pull up on the I/O assembly (if present) to remove it from the motherboard connector.
Figure 4 Instrument, Rear View
The following procedure can be used for all of the I/O assemblies:
• A7A1 Spectrum Analyzer Input/Output Assembly (Option A4J)
• A7A2 GPIB/Parallel Assembly (Option A4H)
• A7A3 RS-232/Parallel Assembly (Option1AX)
Installation and Replacement
13.Carefully plug the I/O assembly into the motherboard.
• A7A1 Spectrum Analyzer Input/Output Assembly (Option A4J) goes into slot 6.
• A7A2 GPIB/Parallel Assembly (Option A4H) goes into slot 1.
• A7A3 RS-232/Parallel Assembly (Option1AX) goes into slot 1.

Installation Note E4401-90039 11
14.Replace the single screw that secures the I/O assembly to the chassis, but do not tighten it yet.
Refer to Figure 3.
15.Replace the vibration support at the top rear of the instrument. Line up the tabs on the support
with the holes in each assembly and rear blank panel. Slide the support sideways into the holes,
then rotate down until the ends clip into the power supply and the IF assemblies. Refer to Figure 3.
16.Tighten all the screws that were loosened in the removal procedure. Torque to 9 inch pounds.
17.Carefully position the inner shield on the instrument as shown in Figure 2.
18.Replace the 16 screws (1) shown in Figure 2 (15 if you have the tracking generator option). Torque
to 9 inch pounds.
19.Carefully place the spectrum analyzer on the work surface with the front frame facing down.
20.Replace the instrument outer case by matching the grill on the side of the case to the fan on the A5
power supply assembly.
21.The rear EMI contact grid (3) that clips onto the rear panel can come loose. When
replacing the outer case, make sure the gasket is in the correct position. Refer to Figure 1.
22.Fit the leading edge of the case completely into the slot on the back of the front frame assembly.
23.Replace the rear frame assembly (2) using the four screws (1) to fasten the rear frame to the
instrument. Torque to 21 inch pounds.
24.Refer to Table 19 in Chapter 5 of the Agilent Technologies ESA-L1500A Spectrum Analyzer Service
Guide for the related adjustments and performance verification tests required for each assembly.
Functional Testing
❏Option A4H, GPIB/Parallel.
1. Connect to GPIB Controller.
2. Send and receive data.
3. Remove cable from the GPIB connector and install the protective caps on the GPIB and parallel
connectors.
❏Option 1AX, RS-232/Parallel.
1. Connect to RS-232 Controller.
2. Send and receive data.
3. Remove cable from the RS-232 connector and install the protective caps on the RS-232 and
parallel connectors.

12 Installation Note E4401-90039
❏Option A4J, IF, Sweep, and Video Output.
Use an oscilloscope on the following outputs and confirm the presence of signal.
a. SWP OUT
Analyzer settings
Preset, System
50 MHz osc ON
Frequency 50 MHz
Span 0 Hz
Check for a sweep ramp of 0 to +10 volts.
b. HI SWP OUT
Analyzer settings
Preset, System
50 MHz osc ON
Frequency 50 MHz
Span 0 Hz
Check for a 0 to 5 volt signal, TTL signal.
c. AUX VIDEO OUT
Analyzer settings
Preset, System
50 MHz osc ON
Frequency 50 MHz
Span 5 MHz, Bw/Avg 1 MHz
Amplitude −276 dBm
Scale Type Lin.
Check for a 0 to 1 volt signal similar to that displayed on the analyzer’s display. Trigger
oscilloscope from HI SWP OUT (positive edge).
d. AUX IF OUT
Analyzer settings
Preset, System
50 MHz osc ON
Frequency 50 MHz
Span 0 Hz
Amplitude -276 dBm
Scale Type Lin.
Check for a 21.4 MHz signal, approximately 250 mV at signal’s maximum peak.
e. HI SWP IN
Analyzer settings
Preset
Connect a 50 Ωtermination or short from the center lead of the HI SWP IN to ground.
Check to see that the analyzer stops sweeping.