Motorola R-2001A Service Manual page 157

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71-86
91-98
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87
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5 VDC • AM MOD
AM MOD
+
DC REF (I)
INT MOD
(I)
INT MOD RTN (I)
EXT MOD (I)
EXT MOD RTN (I)
1 KHz SINE (I)
1 KHz SINE RTN (I)
U10, 13, 21 , 31
A()-A15
ADRS
D()-D7
DECODE
AND
-
NMI
CONTROL
HALT
LATCHES
EXTAL
U1 , 15-18
RESET
..___
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BUS
INTERFACE
VMA
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R/W
IEEE OPT DET
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r RFLEVELcoNT'-,
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SEL SW
U24, 34, 44,
AND
51 , 64,65
PRGM
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ATTEN
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l
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SEL SW
U27, 37, 47 ,
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AND
52, 66, 67
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SEL SW
U26, 36, 46,
I
AND
52, 66, 67
PRGM
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ATTEN
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SEL SW
U25, 35, 45,
l
AND
52, 64, 65
I
P RGM
ATTEN
I
~------
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AM MOD
+
DC REF (0)
P1
INT MOD RTN
(0)
EXT MOD RTN
(0)
1 KHz SINE RTN (0)
I
I
10 DB, 20 DB, 30 DB , 35 DB
DI01-DI08, DAV
NRFS, NOAC, ATH, IFC,
REN , SRQ , EOI
(IEEE-488 BUS)
Figure 14-1. IEEE Interface Module AB
Block Diagram
/
/
42
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36
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30
J1
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1-14
J2
1-24
852"33