HP 3562A Service Manual page 356

MO D E L 3S62A
MR FFTl
M R F P P l
MSMP
MYA D D R S l
N C lK
N DAC
ND CK
N lD
FFT MEMORY R E Q U E ST
Active Low
The A9 FFT asserts the memory req uest l i ne when it w i s hes to add ress
the AB G l obal RAM .
FPP M E MORY R E Q U E ST
Active Low
The A7 FPP asse rts the memory req uest l i ne when it wish es to add ress
the AB G l obal RAM .
EXTE RNAL SAM P L E E R ROR
(A32, A34 TP61 1 )
Active H i gh
Status signal from the A32, A34 Analog D igital Converters to the
AS D igital F i l ter. MSMP is asse rted when operating in the external
sample mode and the sample freq u e n cy is too fast. T h is s ignal is
latched by the d i g ital fi l ter and can be read by the A2 System C P U
a s part o f the d i g ital fi lter status word .
MY ADDRESS
Active Low
The A6 D igital Fi lte r Contro l ler sends the AS D i g i tal F i lter th is s ignal
when the A2 System C PU is add ressing AS D igital Fi lter. MY A D D R E SS
is u sed by the AS D igital F i lter for command decod i ng.
C H I R P C LOCK
(A4 TP1 9)
The A1 Digital S o u rce sends this s i g n a l to the A4 Local Osc i l l ator at
the beg i n n i n g of c h i rp to reset the A4 Local O sc i l l ato r to the i n itial
f requency of the c h i rp and to zero the phase. This s i gnal is p resent
when other modes are u sed, but the A4 Local Osc i l l ator uses N C L K
o n ly for the c h i rp mode.
I L L-'
� / ' I / ' I ' '- ' I , ' '-' '-' L. I
n A T A I\J () T A r r != P T != n
Signal to and from the A2 System C P U to the A22 H P-l B. T h i s l ine is
u sed in the H P-I B handshake se uen ce.
(A4 T P1 6)
Si ne or dc data f rom the A4 Local Osc i l l ator to the A1 D i g ital S o u rce.
DATA C LOCK
(A4 T P1 4)
The NDCK s i g n a l from the A4 Local Osc i l lator c locks the LO serial
data (N DAT) i nto the the A1 D igita l Source.
LOAD D I G I TA L SO U RC E
(A4 TP1 7)
S ignal from the A4 Local O s c i l lator that l atches the LO's serial data
(N DAT) i nto the A1 D i g ital Sou rce.
C I RCU IT D E SC R I PT I O N S
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