HP 8924E, Assembly

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477
Chapter 11, Block Diagrams
Assembly Details
N:\mkt\MANUALS\HP8924C\ALR\blkdia.fb
Dig
ital 1
and 2
CD
MA
Cl
o
c
ks
Da
ta T
o/F
rom
Ti
me
-mu
ltip
lex
ed
J1
B3
-6
Bi
di
re
ct
ion
al
I &
Q
Mo
dul
atio
n
Sig
n
al
s fr
om
the
LO/
IF/D
EM
OD
J2
Pow
er
Su
ppl
ies
and
G
rou
nds
(J
1):
A
2,
5-9,
12,
17-
19,
24,
30
B1
,2
,3
0
(J
2):
A
3,
6,1
2,
18
,2
4,
31
B
3,
6,
31,
32
C1
8
Gn
d
(J
1):
A
29,
B
29,
C29
+3
.3
V
+1
2
V
J1-
A16
26
.67
m
s
20
ms
CH
IPX
16
CH
IP
X8
PP
2S
/
To
var
iou
s co
mp
one
nts
th
roug
ho
ut t
his
boa
rd.
1.
25m
s
i960 Micro
p
ro
ce
sso
r:
Co
m
m
u
n
ica
tio
n
s
wit
h
th
e P
rot
o
c
ol
a
s
s
e
m
-
bl
y t
o
a
nal
yz
e
re
ce
ive
d
CDM
A sig
-
na
ls, and
to cre
a
te
I &
Q d
a
ta
for
th
e Ce
ll
S
ite A
n
al
og
asse
mb
ly
to gen
er
ate C
D
M
A
si
gn
al
s.
Pr
oto
col
Pr
oce
sso
r
As
sem
bl
y
C
3-6
,
F
IFO
In
terf
ace
Ba
se
St
a
tio
n
M
o
d
u
la
to
r
#2
fo
r g
e
n
e
rat
in
g
C
D
M
A
c
han
nel
s
5 to
8.
B2
3-
3
0
C
23-
30
J2
B7
-1
4
C7
-1
4
J1-
C
12
>
S
yst
em
Re
set
Man
ua
l Re
set
S1
As
se
mbl
y
Se
ria
l Vit
erb
i
D
eco
de
r
I a
n
d
Q d
ata
to
the
Ce
ll S
ite
An
alo
g
As
se
mb
ly.
F
las
h Bo
ot
RO
M
12
8K
x8
Fla
sh Pro
gra
m
RO
M
1M
x
8
SR
AM
Pr
og
ra
m
Me
mo
ry
128
K
x8 (
x8)
J2
A
1
9,
20
IF
G
ain
Ad
jus
t
to
th
e L
O
/I
F/D
EM
OD
As
se
mb
ly
J1
B
20-
27
C2
0-
27
I &
O G
ain
Co
ntr
o
l
Dat
a to
th
e C
ell S
ite
Ana
log
As
se
mbl
y
J2
A7
-1
1
13
-1
5
R
ear
Pa
ne
l
CE
LL S
IT
E
/T
RIG
GE
RS
Con
ne
cto
r
J2
B
1
6,
17
C
16,
17
CD
MA
Sp
ec
tr
um
A
n
al
yze
r T
rigg
ers
B
a
s
e
S
ta
ti
on
Mo
dul
a
tor
#
1
fo
r g
ene
ra
ti
ng
C
D
M
A
ch
ann
el
s 1
to
4.
Un
iv
e
rs
a
l
A
sy
n
ch
ro
nous
Re
ce
iv
er
Tr
a
ns
m
itte
r
(U
AR
T)
To opt
ion
al
Vo
cod
er
Un
iv
er
sa
l
Asyn
ch
ro
no
us
Re
ce
iv
er
Tra
ns
m
itte
r
(U
AR
T)
J2
B1
9
-2
2
C1
9-
22
(O
pti
o
na
l)
Com
m
uni
cat
ions
bet
wee
n C
ell
Sit
e
Dig
ital
As
sem
bl
ies
J1
A2
0-
2
3
A2
5-
2
7
B1
2-
1
5
J2
-B1
8
A
d
dr
e
ss
an
d
Da
ta
B
us
se
s
Addr ess an d D ata Busse s
+5
V
(J
1):
A
31-
32
,B
31
-3
2,
C3
1-
3
2
(J
2):
A2
,B
2
,C
2
+
15V
(J2)
:
A1
,B
1
,C
1
-5
V
(J1
):
A2
8,
B2
8,
C
2
8
-12
V
(J2
):
A
4
,B
4,
C4
-15
V
(J2
):
A
5
,B
5,
C5
A7 & A9: Cell
Site
(A
7&
9-
B
D
.F
B
)
Note
: A9J
1
&J
2
c
or
re
spo
nd to J
58 an
d J
59 on th
e mothe
rboar
d (
res
pec
tiv
e
ly
).
A
7
J1
&
J2 c
or
res
pond
to J
62 an
d J
6
3.
J1
-A
10
J1
-A
11
J1
-A
13
J1
-A
14
J1
-A
15
IQ
Mo
dul
atio
n
D
eco
de
r
A22
-30
J2
J1
-A
16
1
.25
ms