Rohde & Schwarz M3SR Series 4100, Service Manual, Page: 66 / 138

R&S M3SR Series 4100 HF Transceivers Motherboard - Function
6124.9007.82.01 1.30
Fig. 1.12 Motherboard, Block Diagram
Ra
di
o
Co
nt
ro
lle
r
Fr
ont
en
d
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nt
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r
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gi
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te
rf
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7..0
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gc
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(d
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nt
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CD
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us
)
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itch
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y
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E
Y
L
IN
E
audi
o
co
nnec
tor
PA
RCB
Ser
Headset
FP_HEADSET
FP_MIC
Fi
llg
un
Front
panel
Au
d
io
S
w
it
ch
M
a
tr
ix
LINE1_TX
LINE2_TX
LINE1_RX
LINE2_RX
LINE_RX_2
LINE_RX_1
LINE_TX_2
LINE_TX_1
audio
connector
4
12
Sw
itc
h-
Ct
rl
A
udi
o-
Ad
ju
st
ERASE
ER
A
SE
PT
T
ERASE_SWITCH
ON/OFF
LED's
Fr
on
tp
an
el
+1
2V
,-
12
V
,+
3,
3V
,+5
V
T
X
_I
nh
ib
it
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X
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nhi
bi
t
NO
G
O
,~
Sq
ue
lc
h,
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T
T
_O
u
t
R
S232
F
PG
A
At
ten
ua
tor
RCB
Se
r
fi
be
r
opt
ic
tr
an
sc
ei
ver
PT
T
L
ogi
c
I2
C
M
ast
er
PW
R/
FA
N
CT
R
L
I2
CC,
I2
CD
(I
2C
-B
us
)
Speaker
R
ea
rpan
el
Fl
as
h
dr
iv
er
Er
as
e
Lo
gi
c
PS_PFI
Ext/Int Speaker
FL
A
S
H
CP
L
D
Fi
ll
gu
n
_d
et
ec
t
PL
L
VC
X
O
CL
K
ERAS
E_SW
ITCH
F
ill
g
un_d
et
e
ct
3.
3_i
nt
CL
K
ICN-S4100-A-E11100-R-D0894-00209-A-01-1