E4433B-03B
SERVICE NOTE
SUPERSEDES: E4433B-03A
ESG "B" Series RF Signal Generator
Defective 1 GHz VCO on the reference board (A11) displays
Error 513 "Het band VCO Unlock" and causes frequency
inaccuracy bel ow 250 MHz.
Serial Numbers:
E4400B-03B US38440487-US39340 708 & GB38450200-GB39 340269
E4420B-02B US38440519-US39340 719 & GB38450272-GB39 340313
E4421B-02B US38440535-US39340 832 & GB38450457-GB39 340827
E4422B-02B US38440334-US39340 523 & GB38450127-GB39 340228
E4430B-02B US38440217-US39340 294 & GB38450163-GB39 340178
E4431B-02B US38440257-US39340 403 & GB38450249-GB39 340275
E4432B-02B US38441439-US39342 082 & GB38450432-GB39 340694
E4433B-01B US38440755-US39341 087 & GB38450413-GB39 340593
To Be Performed By: Agilent Tech nologies- Qua lif ie d Personnel an d
customers capable of running the Agilent ESG Service Software.
Parts Required:
P/N Description Quantity
E4400-60244 Pre-tested 1 GHz VCO 1
DATE: August 2000
ADMINISTRATIVE INFORMATION
SERVICE NOTE CLASSIFICATION:
MODIFICATION RECOMMENDED
ACTION
CATEGORY:
LOCATION
CATEGORY:
AVAILABILITY: PRODUCT’S SUPPORT LIFE AGILENT RESPONSIBLE UNTIL: Support Life
IMMEDIATELY
ON SPECIFIED FAILURE
AGREEABLE TIME
CUSTOMER INSTALLABLE
ON-SITE
SERVICE CENTER
STANDARDS:
LABOR 40 min assy, 30 min test Hours
SERVICE
INVENTORY:
RETURN
SCRAP
SEE TEXT
USED
PARTS:
Continued
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AUTHOR: SN ENTITY: 5923 ADDITIONAL INFORMATION:
© 2000 AGILENT TECHNOLOGIES
PRINT ED IN U.S.A.
1 of 3
Page 2 Service Note E4433B-03B
Tools, Equipment an d Man ual s Required :
-ESG Family Signal Generators Service Guide
-ESG Family Signal Gene r at or s Ca libration Guide
-ESG Family Serv ice Soft ware
-T-8 TORX screwdriver
-T-15 TO RX screwd rive r
-T-20 TO RX screwd rive r
-soldering tool s
-Agilent 8563E Spe ctru m Ana lyze r
-Agilent 8491B Option 010 Attenuator (1 0 dB)
Situation
The ESG-B Family of Signal Gene r ator s ha s be en exp erien cing failures in the refe rence boa rd
modules with pa rt numbers E4400-601 39 a nd E4400-60140. This is due to the failure of the 1
GHz VCO which causes the ESG to display Error 513 "Het band VCO Unlock". Due to the
existance of this pro ble m, a corr e ctive action was taken on Februa r y 7, 2000. However, the initi al
corrective action needs to be modified. All ESG’s, with refer en ce boar ds E4400-60139 and
E4400-60140, and serial numbers mentione d a bove, may experie nc e Error 513. I f this e rror
occurs, the 1 GHz VCO needs to be replaced. As a consequence, the ESG-B population with
affected VCOs will decrease significantly if we provide the service centers and customers with
the means to replace the 1 GHz VCO and not the entire reference module. The Pre-tested 1 GHz
VCO pn E4400-60244 is avail ab le on CPL and shoul d be treated a s a warrant y repair. To or de r,
provide the model and se r ial num be r of th e ESG, and the part number of the re fere nc e bo ard.
Also reference this service note as "Error 513". These information will ensure the ESG fits into
the suspected range of de fective 1 GHz VCOs.
Solution:
The resoluti on pla n c onsists of the following:
1. Repair on failur e .
2. Prevent future occurances of Error 513 by repairing the ESG in advance. When the ESG is
returned for service or calibration,check for the following criteria:
-ESG’s serial number falls with in range mentione d ab ove.
-ESG’s reference board num be r is E4400- 60139 or E4400-60140.
-ESG has not been tre ated for defect "Error 513 ".
If all three criteria are true, replace 1 GHz VCO. Otherwise, no prevention is necessary.
Replace the defectiv e 1 GHz VCO with p/n E4400-60244 an d do the "Nonharmonics"
performance test in accordance to the Calibration Guide (Refer to "Nonharmonics" "Performance
tests" procedur e on Calibration Guide). If the c ustomer is capable of running the ESG Service
Software, repair ma y be pe rfor med by followi ng the instructions be low , othe r w ise shi p fail ed
units to Agilent Tech nologies custo me r service center as descr ibe d in the routing guide .
Instructions for rem oving and replacing the 1 GHz VCO pn E4400-60244, and for cali br at ing the
ESG:
Continued
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