Keysight E8251-60690 Installations- und Betriebshandbuch

Keysight E8257D/67D and E8663D PSG

Signal Generators Add Option UNY

(Enhanced Ultra-Low Phase Noise)

Kit Part Numbers: E8251-60690 and E8251-60990

Part Number: E8251-90396

Supersedes: July 2013

Printed in USA: August 2014

Installation Note

Notice.

The information contained in this document is subject to change without notice.

Keysight 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.

Keysight 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.

Installation Note E8251-90396 3

Add Option UNY (Enhanced Ultra-Low Phase Noise)

Kit Part Numbers: E8251-60690

Introduction

This upgrade kit adds Option UNY (Enhanced Ultra-Low Phase Noise Performance) to an

E8257D, E8663D (Analog) or E8267D (Vector) PSG Signal Generator. This kit applies to

instruments that have either a standard crystal oscillator or Option UNX.

Installation includes the following major steps, starting on page 5:

1. Check signal generator functionality.

2. Check firmware version and upgrade if <C.06.15.

3. Remove the outer and inner signal generator covers.

4. Remove the A32 10 MHz Crystal Oscillator.

5. Install the A32 10 MHz Crystal Oscillator.

6. Remove and replace A5 with A46 and A6 with A45.

7. Install A43 board and cables.

8. Activate Option UNY.

9. Verify proper installation of Option UNY.

10.Re-assemble the signal generator.

11.Update calibration arrays.

12.Verify signal generator calibration.

Products Affected: E8257D/67D and E8663D

Serial Numbers: >MY/SG/US5042xxxx

Options: N/A

To Be Performed By: (X) Keysight Service Center

Estimated Installation Time:

Estimated Verification Time:

2.0 Hours

1. For instruments with serial prefixes >US5150/MY5150.

4Installation Note E8251-90396

Installation Kit Parts List

E8251-60690

E8251-60990

(For E8257D and E8663D with serial prefix > US5150/MY5150)

Tools Required

❏TORX T-10 driver

❏TORX T-15 driver

❏TORX T-20 driver

❏Needle-nose pliers

Item Quantity Description Keysight Part Number

1 1 W155 Cable A33/A33 75G 8121-0646

2 1 Assembly, Frac-N, Used with Offset Loop E8251-60437

3 1 Assembly, Offset Loop E8251-60438

4 1 Oscillator Assy - UNY E8251-60798

5 1 Installation Note E8251-90396

Item Quantity Description Keysight Part Number

1 1 Cable A33/A33 75G 8121-0646

2 1 Assembly, Frac-N, Used with Offset Loop E8251-60437

3 1 Assembly, Offset Loop E8251-60438

4 1 Oscillator Assy - UNY E8251-60798

5 1 Cable Retainer E8251-40001

6 1 Retainer - Cable Top E8251-40007

7 1 Cable, LB Output to Amp Filter Board, 2 piece, Bottom E8251-20488

8 1 Cable, LB Output to Amp Filter Board, 2 piece, Top E8251-20489

9 1 A43, Assy, Amp Filter BD E8251-60633

10 1 Installation Note, UNY Upgrade Kit E8251-90396

11 1 Entitlement Certificate n/a

Installation Note E8251-90396 5

Safety Considerations

WARNING Before you disassemble the signal generator, turn the power switch off and

unplug the power cord. Failure to unplug the signal generator 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.

Check Signal Generator Functionality

Use the following procedure to confirm that the signal generator powers up and the internal

check identifies no errors. The internal check evaluates the operation of the signal generator

and returns an error message if it detects a problem.

NOTE When the signal generator is first connected to ac line power, the error

message ERROR 514, Reference Oven Cold occurs, which causes both

the OVEN COLD annunciator and the ERR annunciator to turn on.

After approximately five minutes, the OVEN COLD annunciator automatically

clears, but the ERR annunciator remains on until all errors are cleared from

the error queue.

1. Turn on the signal generator and let it warm up for at least five minutes.

2. Run the signal generator self-test by pressing

Utility > Instrument Info/Help Mode > Self Test

> Run Complete Self Test

. Upon completion, a summary of the self-test will be displayed.

Use the E8257D/67D, E8663D PSG Service Guide, E8251-90359, to troubleshoot any

failures detected by the test.

NOTE Some circuits may require up to 50 minutes to warm up before passing the

self-test. If self-tests continue to fail after 50 minutes of warm up,

troubleshoot the instrument.

3. Check to see if the ERR annunciator is on.

• If the ERR annunciator is on, review the error messages in the error queue by pressing

Utility > Error Info

. The first page of error messages in the error queue appears in the

display text area. (Refer to the signal generator error messages document for

information about each error message.)

After resolving all problems causing errors, press

Clear Error Queue(s)

• If the ERR annunciator is off, the signal generator functionality check has passed.

6Installation Note E8251-90396

Check Firmware Version and Upgrade if <C.06.15

1. Press

Utility > Instrument Info/Help Mode > Diagnostic Info

2. Find the firmware information.

3. If the version of firmware is <C.06.15, upgrade the firmware.

Remove the Outer and Inner Signal Generator Covers

Remove the Outer Cover

Refer to Figure 1.

1. Disconnect the power cord.

2. Using a T-20 driver, loosen the two screws (1) and remove the strap handle (2).

3. Using a T-15 driver, remove the center screws (3) on the four rear-panel feet (4).

4. Remove the four bottom feet (5) from the cover by lifting the tab and sliding the foot toward

the tab.

5. Place the signal generator on its side.

6. Tilt the signal generator forward and slide the outer cover (6) back to remove it from the

frame.

Remove the Inner Top Cover

Refer to Figure 2.

1. Using a T-10 driver, remove the screws (1) from the inner-top cover (2). There are twelve

screws for E8257D/E8663D and eleven screws for E8267D.

2. Remove the inner-top cover.

Installation Note E8251-90396 7

Figure 1 Outer Cover Removal

8Installation Note E8251-90396

Figure 2 Inner Top Cover Removal

Installation Note E8251-90396 9

Remove the A32 10 MHz Crystal Oscillator

Refer to Figure 3 for this procedure.

1. Position the signal generator with the rear panel facing you.

2. Using the needle-nose pliers, disconnect the W47 flexible cable (A31 Motherboard J1041)

from A32J2.

3. Using the needle-nose pliers, disconnect the W48 flexible cable (10 MHz EFC) from A32J1.

4. Disconnect the A32W1 bias cable from the A21 Rear Panel Interface P2.

5. Using the T-10 driver, remove the three screws (3) that attach the A32 10 MHz Crystal

Oscillator to the rear panel.

6. Remove the A32 10 MHz Crystal Oscillator.

Install the A32 10 MHz Crystal Oscillator

NOTE W47 may be shipped disconnected from the A32 10 MHz Crystal Oscillator. If

it is disconnected, connect one end of the cable to A32J2 before you start

the installation procedure.

Refer to Figure 3.

1. Position the signal generator with the rear panel facing you.

2. Using a T-10 driver, install the three screws (3) to secure the A32 10 MHz Crystal Oscillator

to the rear panel.

3. Connect the A32W1 bias cable to the A21 Rear Panel Interface Board, A21P2.

4. Using the needle-nose pliers, connect the W48 flexible cable from 10 MHz EFC (rear panel

connector) to A32J1.

5. Using the needle-nose pliers, connect the W47 flexible cable to J1041 of the A31

Motherboard.

10 Installation Note E8251-90396

Figure 3 A32 10 MHz Crystal Oscillator

A32 A21P2 A47A32W1 A48

a.Used only on E8267D with serial prefix <US4824/MY4824 and all E8257D.

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