HP 8563e, 8561e schematic

4.3 (3)

HP 8561E and 8563E Spectrum Analyzers

Service Guide Supplement

Using Performance Tests When an

HP 3335A Source Is Not Available

Manufacturing Part Number: 08563-srvsup

Printed in USA

October 1999

Notice

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

Hewlett-Packard 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. Hewlett-Packard 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.

Assistance

For any assistance, contact your nearest Hewlett-Packard Sales and Service Ofﬁce.

General Safety Considerations

WARNING Before this instrument is switched on, make sure it has been properly grounded through the protective conductor of the ac power cable to a socket outlet provided with protective earth contact.

Any interruption of the protective (grounding) conductor, inside or outside the instrument, or disconnection of the protective earth terminal can result in personal injury.

WARNING There are many points in the instrument which can, if contacted, cause personal injury. Be extremely careful.

Any adjustments or service procedures that require operation of the instrument with protective covers removed should be performed only by trained service personnel.

CAUTION Before this instrument is switched on, make sure its primary power circuitry has been adapted to the voltage of the ac power source.

Failure to set the ac power input to the correct voltage could cause damage to the instrument when the ac power cable is plugged in.

1. Using this Adjustment Procedure Supplement
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.1-2
Implementation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.1-3
2. Adjustment Procedures
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.2-3
Using the TAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-11
2a. Manual Adjustment Procedures: HP 3335A Source Not Available
What You'll Find in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2a-2
Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2a-3
4a. IF Amplitude Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2a-4
5a. DC Log Ampliﬁer Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2a-9

Contents-1

Contents

Contents-2

1Using this Adjustment Procedure Supplement

This chapter contains an introduction that explains the need for this service guide supplement and instructions on how to implement the supplement material.

1-1

Using this Adjustment Procedure Supplement

Introduction

The HP 3335A Synthesizer Level Generator signal source has become obsolete because parts used in the manufacture of this instrument are no longer available from suppliers. To meet the needs of our customers, HP has created new performance veriﬁcation tests and adjustment tests that use alternative signal sources.

The calibration and service guides are being revised to add additional procedures that do not use the HP 3335A. The changes include the addition of signal sources required to replace the 3335A, changes to the test equipment setup illustrations, and changes in the steps required to execute the procedures.

Because all of our customers will not need to replace the HP 3335A immediately, we are releasing the changes to the calibration guide and service guides in the form of two manual supplements. HP is making these procedure revisions available at this time in electronic form, only. You can download this manual supplement, and add it to your current manual as needed. You will not be required to replace your manuals just to incorporate these changes. These changes will be incorporated in new manuals shipped in the future.

To add these changes to your existing manuals, refer to “Implementation Instructions,” on page 3.

1-2

Chapter 1

Using this Adjustment Procedure Supplement

Implementation Instructions

Update your service guide by performing the following steps:

Step 1. After downloading this supplement, print a hard copy of the entire document.

Step 2. Remove page 2-1 through 2-10 from your service guide.

Step 3. Cross out Table 2-5, “Required Test Equipment for TAM,” on page 2-11.

Step 4. Insert page 2-1 through 2-12 from the supplement into the service guide.

Step 5. Remove the adjustment procedure chapter from the supplement, and insert it into your service guide as Chapter 2a, “Manual Adjustment Procedures:

HP 3335A Source not Available,” immediately after Chapter 2.

Chapter 1

1-3

Using this Adjustment Procedure Supplement

Implementation Instructions

1-4

Chapter 1

2 Adjustment Procedures

2-1

Adjustment Procedures

Introduction

This chapter contains information on automated and manual adjustment procedures. Perform the automated procedures using the HP 85629B test and adjustment module (TAM). Adjustments should be performed after a repair or performance test failure, never perform adjustments as routine maintenance. Refer to Table 2-1 to for which adjustments to perform.

Automated Procedures

Using the TAM

Manual Procedures

1.High Voltage Power Supply Adjustment

2.Display Adjustment

3.IF Bandpass Adjustment

4.IF Amplitude Adjustments

5.DC Log Ampliﬁer Adjustments

6.Sampling Oscillator Adjustment

7.YTO Adjustment

8.LO Distribution Ampliﬁer Adjustment (HP 8561E)

9.LO Distribution Ampliﬁer Adjustment (HP 8563E)

10.Dual Band Mixer Bias Adjustment (HP 8561E)

11.Frequency Response Adjustment (HP 8561E)

12.Frequency Response Adjustment (HP 8563E)

13.Calibrator Amplitude Adjustment

14.10 MHz Reference Adjustment — OCXO

15.10 MHz Reference Adjustment — TCXO (Option 103)

16.Demodulator Adjustment

17.External Mixer Bias Adjustment

18.External Mixer Amplitude Adjustment

19.Signal ID Oscillator Adjustment

20.Switched YIG-Tuned Filter (SYTF) Adjustment (HP 8561E)

21.YIG-Tuned Filter/Mixer (RYTHM) Adjustment (HP 8563E)

22.16 MHz PLL Adjustment

23.600 MHz Reference Adjustment (serial preﬁx 3406A and above)

NOTE	Before performing any adjustments, allow the spectrum analyzer to warm up
	for at least 5 minutes.

Safety Considerations

Although this instrument has been designed in accordance with international safety standards, this manual contains information, cautions, and warnings which must be followed to ensure safe operation and to prevent damage to the instrument. Service and adjustments should be performed only by qualiﬁed service personnel.

2-2

Chapter 2

Adjustment Procedures

Introduction

WARNING

•These servicing instructions are for use by qualiﬁed personnel only. To avoid electrical shock, do not perform any servicing unless you are qualiﬁed to do so.

•The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the product from all voltage sources while it is being opened.

•Adjustments in this section are performed with power supplied to the instrument and protective covers removed. There are voltages at many points in the instrument which can, if contacted, cause personal injury. Be extremely careful. Adjustments should be performed only by trained service personnel.

•Power is still applied to this instrument with the LINE switch in the off position. Before removing or installing any assembly or printed circuit board, remove the line-power cord.

•The power cord is connected to internal capacitors inside that may remain live for 5 seconds after the instrument has been disconnected from its source of supply.

•Use a nonmetallic adjustment tool whenever possible.

Which Adjustments Should Be Performed?

Table 2-1 lists the manual adjustments that should be performed when an assembly is repaired or changed. It is important to perform the adjustments in the order indicated to ensure that the instrument meets its speciﬁcations.

Chapter 2a, “Manual Adjustment Procedures: HP 3335A Source not Available,” provides instructions and procedures for making adjustments when the HP 3335A Synthesizer Level Generator is not available. If the HP 3335A is not available, substitute those procedures for the procedures of the same number and name found in this chapter.

Test Equipment

The equipment required for the manual adjustment procedures is listed in Table 1-4, “Recommended Test Equipment.” Any equipment that satisﬁes the critical speciﬁcations given in the table may be substituted for the preferred test equipment.

Adjustable and Factory-Selected Components

Table 2-2 lists the adjustable components by reference designation and name. For each component, the table provides a description and lists the adjustment number.

Refer to Table 2-3 for a complete list of factory-selected components used in the instrument along with their functions. Factory-selected components are identiﬁed with an asterisk on the schematic diagrams.

Chapter 2

2-3

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