HP 5061A

MANUAL CHANGES MODEL 5061A Page 15
CHANGE 11 (1940A) STANDARD INSTRUMENT (Continued)
ground connection to pin 4.
Page 4-4, Paragraph 4-37, Second Line:
Change 12.631,771,6 MHz in line 2 to 12,631,772.5 Hz.
Page 4-20, Paragraph 4-211, Fourth Line:
Change 61 to 76 milligauss.
Page 5-10, Table 5-3, Assembly Designations:
Change HP Part No. for Al from 05061-6097 to 05061-6158 (SERIES 1940).
Page 5-13, Paragraph 5-51, Third Line:
Change 12,6B1,771.6 to 12,631,772.5 Hz.
Page 5-13, Table 5-5, Synthesizer Output Period:
Change "8636 ” under "Digital Divider Hardwired for ” to 5921.
Change "273.2 gs ” under "Signal Period at A1TP1 ” to 815.8 gs.
Page 5-14, Table 5-6, Synthesizer Troubleshooting Chart:
Change "273.2 ps ” to 815.8 ps for measured period at A1TP1.
Page 6-3, Table 6-1, Replaceable Parts for Al Module:
Change A1 part number in HP and Mfr columns from 05061-6097 to 05061-6158.
Change A1 series number from 1908 to 1940.
Change Al cover (Al MISC PARTS) part number from 05061-0054 to 05061-0088 in HP and Mfr part number columns.
Change A1A1 Board Assembly series number from 1908 to 1940.
Page 6-5, Table 6-1, A1A1 Replaceable Parts:
Change A1A1R84 from 0757-0948 (10 Kill to 0757-0939; R:FXD ELM 4.3K 2% .125W; 28480; 0757-0939. FACTORY
SELECTED VALUE.
Pages 8-9 and 8-11, Figures 8-8 and 8-9, A1 Schematic Daigrams:
Change A1 part number in both diagrams from 05061-6097 to 05061-6158.
Change Al Assembly and A1A1 circuit board series numbers from 1908 to 1940.
Change connections to Preset Decade IC1 (in Figure 8-8i by removing common
Add a common ground connection to IC1 pin 3.
Add a common ground connection to IC2 pin 4.
Remove common ground connections to IC5 pins 4 and 11.
Add common ground connections to IC5 pins 10 and 3.
Remove common ground connection to IC6 pins 4 and 3.
Add a common ground connection to IC6 pin 11.
NOTE The above changes in connections to the Preset Decade Dividers changes the division number from 1366 to
4079 and the synthesizer output frequency from 12,631,771.6 Hz to 12,631,772.5 Hz.
Paee 6-21 Table 6-1, A15 Replaceable Parts:
Change A15R21 from 0811-3260 (2350) to 0811-1016; R:FXD 185 OHM 1% 3W WIRE TC=0+20 PPM/° CELSIUS; 28480;
0811-1016. FACTORY SELECTED VALUE.
Page 8-51, Figure 8-28, A15 Schematic Diagram:
Change value of R21 in NOTE 4 from 235 to 185 ohms.
Change value of A15R21 in schematic diagram from 360 to 280 ohms.
NOTE — Resistors selected for use as A15R19 and A15R21 must have a low temperature coefficient of resistance.
Page 6-23, Table 6-1, A19 Power Supply:
Change A19 series number from 1908 to 1940.
Page 8-57, Figure 8-31, A19 (05060-6092) Schematic Diagram:
Change series number at top of A19 schematic from 1908 to 1940.
Change minimum output voltage range at A19 pin 4 from "-1250V ” to "-1500V ’ .
CHANGE 12 (Serial Prefix 1948A)
Page 4-1, Table 4-1, Assembly Desginations:
Change listing for A10 to the following:
A10 Quartz Oscillator (Options 001, 002, or 003) HP Part No. 00105-6012.
A10 Quartz Oscillator (Option 004 only) HP Part No. 00105-6013.
Page 5-10, Table 5-3, Assembly Designations:
Change listing for A10 to the same given above for Table 4-1.