Agilent Technologies 8751A Guide de démarrage rapide

8751A-17

SUPERSEDES: None

Continued

DATE: 15 April 1995

8751A Network Analyzer

Serial Numbers: 0000J00000 / 3146J00696

0000A00000/3146A00212

Duplicate Service Notes: None

Modification to fix unexptected spurious problem.

To Be erformed By: Agilent-Qualified Personnel

arts Required:

1 of 3

AUTHOR: MT ENTITY: 3355

PRINTED IN U.S.A.

SERVICE NOTE

ADMINISTRATIVE INFORMATION

MODIFICATION RECOMMENDED

SERVICE NOTE CLASSIFICATION:

ACTION

CATEGORY:

LOCATION

CATEGORY:

CUSTOMER INSTALLABLE

ON-SITE

SERVICE CENTER

RESPONSIBILE UNTIL: 15 Apr l 1995

ADDITIONAL INFORMATION:

IMMEDIATELY

ON SPECIFIED FAILURE

AGREEABLE TIME

AVAILABILITY: PRODUCT’S SUPPORT LIFE

RETURN

SCRAP

SEE TEXT

SERVICE

INVENTORY:

RETURN

SCRAP

SEE TEXT

USED

PARTS:

STANDARDS:

Labor 2.0 hrs

art No. Qty Description

1901-0050 1 Diode

0757-02 0 1 Resistor 1K

069 -3444 1 Resistor 316

9100-354 1 Inductor 470 NH

1 54-1073 1 Transistor

0160-4 32 1 Capacitor 0.01 UF

069 -3441 1 Resistor 215

Page 2 Serv ce Note 8751A-17

Situation:

The 751A may show the unexpected spurious response due to the parasitic oscillation

of the source signal.

Solution:

This is caused by the breakdown of A3Q2 transistor. This symptom can be confirmed

using the following procedures:

1. Set the 751A as follows:

CENTER --> 500 MHz

SPAN --> 0 Hz

2. Connect the Spectrum Analyzer to the 751A’s “RF OUT”, and observe the signal

with 1 MHz frequency span.

3. Connect the Signal Generator to “EXT REF IN” on the rear panel. Set the Signal

Generator to 10 MHz.

4. Change the frequency of Signal Generator from 9.999 MHz to 10.0002 MHz.

Observer the 751A’s ouput signal using the Spectrum Analzyer. If a spurious is

observed, the A3Q2 transistor is broken.

Action:

Modify the A3 board with referring the following procedures:

1. Turn the 751A off. Remove the top cover and the shield plate.

2. Remove the A3 board.

3. Modify the A3 board with referring Figure 1:

a. Replace the A3Q2 transistor (P/N 1 54-1073) with the new one.

b. Replace the R3 resistor. 464 ohm --> 1 kohm (P/N 0757-02 0)

c. Replace the R6 resistor. 464 ohm --> 316 ohm (P/N 069 -3444)

d. Replace the L2 inductor. 6 0 nH --> 470 nH (P/N 9100-354 )

e. Replace the location of C5 (0.01 uF, P/N 0160-4 32) and R19 (215 ohm, P/N

069 -3441).

f. Add the diode (P/N 1901-0050) with referring Figure 1.

4. Perform the following adjustments:

100 MHz VCXO Frequency

Fractional N Osc Spurious

1st IF Offset Osc Frequency

LF power linearity

5. Reinstall the A3 board.

Page 3Serv ce Note 8751A-17

Autres manuels Agilent Technologies Instrument de mesure

Agilent Technologies

Agilent Technologies OmniBER OTN Series Manuel d'installation et d'exploitation

Agilent Technologies

Agilent Technologies ADM series Manuel utilisateur

Agilent Technologies

Agilent Technologies 8719ET Manuel

Agilent Technologies

Agilent Technologies Agilent 4396B Manuel utilisateur

Agilent Technologies

Agilent Technologies 8719D Manuel utilisateur

Agilent Technologies

Agilent Technologies U2300A Series Manuel utilisateur

Agilent Technologies

Agilent Technologies E5071C Manuel utilisateur

Agilent Technologies

Agilent Technologies ESA Series Manuel utilisateur

Agilent Technologies

Agilent Technologies 8753ES Manuel utilisateur

Agilent Technologies

Agilent Technologies E4991A Manuel utilisateur

Agilent Technologies

Agilent Technologies Cary 100 Manuel utilisateur

Agilent Technologies

Agilent Technologies 53147A Manuel utilisateur

Agilent Technologies

Agilent Technologies E4406A VSA Series Manuel

Agilent Technologies

Agilent Technologies 8712ET Manuel utilisateur

Agilent Technologies

Agilent Technologies PSA Series Manuel utilisateur

Agilent Technologies

Agilent Technologies E5070B ENA Series Manuel utilisateur

Agilent Technologies

Agilent Technologies MXA Series Manuel d'installation et d'exploitation

Agilent Technologies

Agilent Technologies 16962A Manuel utilisateur

Agilent Technologies

Agilent Technologies E5072A ENA Series Manuel utilisateur

Agilent Technologies

Agilent Technologies 16850 Series Manuel utilisateur

Agilent Technologies

Agilent Technologies X Series Guide de l'utilisateur

Agilent Technologies

Agilent Technologies B1500A Guide d'installation

Agilent Technologies

Agilent Technologies OmniBER OTN Series Manuel utilisateur

Agilent Technologies

Agilent Technologies N5225-60114 Manuel d'installation et d'exploitation

Manuels Instrument de mesure populaires d'autres marques

Suaoki

Suaoki D40 Manuel utilisateur

Elster

Elster BK-G1.6 Manuel utilisateur

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuel

Duratool

Duratool D03128 Manuel utilisateur

Vega

Vega VEGAPULS 65 Manuel utilisateur

Tonghui

Tonghui TH2618B Manuel utilisateur

Tenmars

Tenmars TM-801 Manuel utilisateur

MSR

MSR 145 Manuel utilisateur

TPS

TPS WP-82 Manuel utilisateur

ELMETRON

ELMETRON CP-511 Manuel utilisateur

PCB Piezotronics

PCB Piezotronics 003C30 Manuel utilisateur

Tenma

Tenma 72-10465 Manuel utilisateur

Endress+Hauser

Endress+Hauser Proline Promag 50 Caractéristiques techniques

Siemens

Siemens SITRANS F Coriolis FCT030 Manuel de la liste des pièces

KLINGER

KLINGER CMF V Series Manuel utilisateur

EXFO

EXFO FTB-2 Manuel d'exploitation et d'entretien

Keysight

Keysight M8290A Manuel utilisateur

ADTEK

ADTEK MW-5 Manuel utilisateur