Anritsu MG3702xA Series, Maintenance Manual

Page: 27 / 184

Chapter 2 — Functional Description 2-2 Major Subsystems
MG3702xA MM PN: 10370-10372 Rev. B 2-3
Figure 2-1. Block Diagram of MG3702xA System (2 of 2)
System PCB Co
ntrol
Sweep C
ontro
l
System PCB Co
ntrol
A9 RF Oscillator
To A10 Switched Filter
To A4 and A6
Coarse Loop, Fine
Loop
Steering L
oop
Freq M
u
lt
ipli
er
C
hain
Fin
e
Loop
Sa
m
p
le
r
Phase/Freq
Detector
Osc
2
.5 GHz to
4.0GHz
A7 Reference Loop and Coarse Loop
X2
X3
X3
100 M
H
z
OCXO
Mixer
100
MHz
Tu
ne
DAC
Ext Ref
Dete
ct
Ext Ref Detect
1
/10
100 MH
z L
V
DS to A9 via
mother boar
d
)
100
MHz
(Op
tion
al to
rear panel)
300
MHz
X2
90
0 MHz
PLL
800-1000
MHz VCO
Mixer
÷
4
30
–
90 MH
z
3600 MH
z
C
oarse Lo
op Output (
J
1)
Frequency 202.5 MHz to 217 MHz
or
3
00 MHz
VCO Tu
ne (J5 EFC
fro
m
rear
panel)
Ext 10 MH
z
(J
6
from rear p
anel)
10
0 MHz In
(Optional J3
from
Rear Panel)
J4
J4
J2
J3
J1
232 MHz to 247.2 MHz
Co
arse Loop
100 MHz Loop
Sweep C
ontro
l
Controller / CPU / Display
Display, Keypad and
Rotary Knob
A2 CPU Assembly
System PC (Intel Celeron /
Microsoft
XP Pro)
GPIB
Mo
dule
USB
Module
Har
d
Di
sk
Dr
iv
e
DSP
Module
A8 FPGA/ Synth
Module Digital
Controller
Power Supply
+13v
+16.
25v
-16.
25v
+6.75v
+26v
Main Power Supply Au
xila
ry (Standby)
Power Supply
A3
PC
B
(Voltage Regulators)
AC
Line
Module/
Filter
+3
.3
v
+5
.0
v
+7
.0
v
+8
.0
v
+10.0v +12.0v +15.0v
-1
5.0v
+24v +12v +5 v
(standb
y)
to A2 through A9
P
C
Bs, rear panel
to A2
throu
gh A9 PCBs, most RF com
ponents
to A2 through A9 PC
Bs, a
ll RF comp
onents
to A3, A7 PCBs, fans
to A3 th
rough
A9 PCBs
to A3
, A9 PCBs, sw
itched filter
to switche
d
filter
to A2 through A9
PCBs, H
DD, rear panel
to A3 through A9
P
C
Bs
to 100MH
z oscillator a
nd PS fan
(standby)
to
front pa
nel sw
itch
Rear Panel
Re
ar
Panel
A1
0 A
To A7 R
ef./Coarse Loop
1
0
MHz Ref O
u
t
10 M
Hz
Ref In
From A7 Ref./
Co
arse Loop
In
puts
Ou
tp
uts
Pu
lse Video Out
From A6 ALC
P
u
lse Sync Out
From A6 ALC
To A6
ALC
P
u
lse Trigger I
n
To A6 AL
C via Rib
b
on Cable
and Mo
ther B
oard
EXT
Trigger
In
To A6 ALC
via Ribb
on Cable
and Mo
ther B
oard
EXT ALC In
Lo
ck Status Out
From A4 AUX via Ribbon Cab
le a
nd Mother Board
VGA
AUX
I/O
To
A2
C
P
U via Mo
ther B
oard
Serial IO
To
A2
C
P
U via Mo
ther B
oard
Ethernet
To
A2
C
P
U via Mo
ther B
oard
To
A2
C
P
U via Mo
ther B
oard
2 USB HOST
To
A2
C
P
U via Mo
ther B
oard
USB Device
Rear Pane
l
A10 B
To A4 Auxiliary PCB
via Moth
er Boa
rd
To A7 R
ef./Coarse Lo
op
EFC IN
To A7 R
ef./Coarse Lo
op
100 MH
z In
10
0 MHz Out
F
rom A7 R
ef./
Coar
se Loop
To
A2
C
P
U via Mo
ther B
oard
IEEE 488
BNC Connector MC
X Con
nector
Coaxial Cable
Legend
Assembly