HP 5061A - Service Manual

MANUAL CHANGES
April 21, 1980
CHANGE DATE:
MANUAL DESCRIPTION
INSTRUMENT:
SERIAL PREFIX:
1,2,3,4, 5,6,7,8
1816A 1908 A
1
A5 Series 1916
1840A
1.2
A5 Series 1840
1936 A
3
1 thru 11
1940 A
A2 Series 1848 4
1 thru 12
1948A
1852A
1 thru 13
2002A
1904 A
A5 Series 1904
3.7
5061A-1
5061 A-2
5061 A-3
5061 A-4
5061 A-6
5061 A-7
5061 A-8
NOTE — THE FOLLOWING ERRATA APPLIES ONLY TO INSTRUMENTS WITH SERIAL PREFIX NUMBER 1740A.
17R/S/T/U — 7859-7860-7865/7883/8878/8877/7894/7893/8897-8901/8942/8926-9825/9652/9669/E/
DATE PRINTED:
HP PART NO:
MICROFICHE NO:
IF YOUR INSTRUMENT
HAS SERIAL PREFIX
OR SERIAL NUMBER
JUN 1978
05061-9052
05061-9053
MAKE THE
FOLLOWING CHANGES
TO YOUR MANUAL
(This change supersedes all earlier dated
changes)
• Make all changes listed as ERRATA.
© Check the following table for your
instrument ’ s serial prefix or serial number
and make listed change(s) to manual.
MAKE THE
FOLLOWING CHANGES
TO YOUR MANUAL
HEWLETT
PACKARD
5061A Cesium Beam Frequency
Standard Operating and Service Manual
1740 A
□ NEW OR REVISED ITEM
The following Service Notes are available from your local HP Sales and Service Office.
Service Note No.
1.2,3, 4,5
1.2,3,4,5,6
Description
Improve Decade Divider IC4 in Synthesizer A1
Preferred Replacement Parts that Increase Reliability
Cesium Oven Controller Circuit Modification
Increasing Reliability and Tunability of Harmonic Generator Assembly (A4)
Installation of Hot Wire Ionizer Current Limit Resistors
Summary of Important Circuit Changes, Procedures and Replacement Parts
Modification for Improved Short Term Stability
3, thru 7
1 thru 10
IF YOUR INSTRUMENT
HAS SERIAL PREFIX
OR SERIAL NUMBER
ERRATA
Page 8-5, Figure 8-5, Wiring Diagram:
Add “ (Serial Prefix 1816Ai ” to caption.
Page 8-35, Figure 8-20, A9 Schematic Diagram:
Change SERIES numbers for A9 and A9A1 to 1816.
Page 8-55, Figure 8-30, A17 Schematic Diagram:
Add “ (SERIES 17401 ” to A17 description on bottom edge of diagram.
Page 8-5, Figure 8-5, Wiring Diagram:
Replace with attached Figure 1 Signal Wiring Diagram (Serial Prefix 1740A).
Page 8-35, Figure 8-20, A9 Schematic Diagram:
Replace with attached Figure 2. A9 (05061-6134 SERIES 1740) Schematic Diagram.
Page 8-55, Figure 8-30, A17 Schematic Diagram:
Change output from terminal 4 to “ TO S2B (4, 6, 11,12) MODE ” .
Changeout put from terminal 22 to “ TO SB2 (2, 3) MODE ” .

HP 5061A Specifications

General

Model	5061A
Category	Measuring Instruments
Type	Cesium Beam Frequency Standard
Output Level	1 V rms into 50 ohms
Operating Temperature	0 to 50 °C
Power Requirements	115/230 VAC
Dimensions	133 mm (H) x 425 mm (W) x 476 mm (D)
Frequency	5 MHz
Warm-up Time	30 minutes to reach specified accuracy
Output Frequency	5 MHz

Summary

Manual Changes Overview

New or Revised Service Notes

Lists service notes available from HP Sales and Service offices for manual updates.

Errata and Manual Corrections

Details specific corrections, modifications, and errors found in the manual.

Change 1: 1816 A Serial Prefix Updates

Applies to instruments with Serial Prefix 1816A, detailing specific manual changes.

Change 2: 1840 A Serial Prefix Updates

Applies to instruments with Serial Prefix 1840A, detailing specific manual changes.

Change 3: A5 Series 1840 Updates

Updates for A5 module assembly related to Series 1840, for Options 001 or 003.