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The CPU in the IF section performs the AGC, the cable loss compensation, and the monitoring and
control functionalities.
Figure 3-1is a block diagram of the AP-RFU.
AUTO ON/OFF
RX_LVL
TMG
CNT
Gen
COMP
TH
CNT
t o I F U
LOGAMP
H Y B
4 2 7 . 5
C oa x a l
M H z
O b s t a c l e
C A B L E
i n f o r m a t i o n
A S K
M O D E M
Serge protection
DC +1 6 V
IF部
3.1.5. Operations and Indications
The AP-RFU does not have any operation or indication panels.
3.1.5.1. Indications
The AP-RFU does not have any LEDs or other status indicators.
3.1.5.2. Switches
The AP-RFU does not have any switches.
AP-RFU
RFU-IF
V a ri ab l e[ 20 d B]
VAR_ATT
[30dB]
S A W _ B P F
C A B L E
T e m p
D / A
L O S S
C N T
A T P C
M A X _ H O L D /
R F U
A V E R A G I N G
A / D
¦
A G C
I F U
C o n t
T e m p
D / A
C N T
T e m p S e n s
S A W _ B P F
AG C 2
AG C
F R EQ _C N T[ DA TL C LK /L E ]
Figure 3-1 AP-RFU Block Diagram
I F _ F r e q
1 7 1 0 M H z
T RS EL ( RF )
×2
B P F
UP_CONV
SAW
BPF
1 2 8 2 . 5
HYB
M H z
×3
SW
LOGAMP
BPF
SAW_BPF
×2
2 1 3 . 7 5
TRCNT
M H z
×2
B P F
A GC 2
DOWN_CONV
RFU_PS
3-26
RF
PA
F RE Q _C NT
×n
WG
SW
2.4GHz
BPF
2 6G :× 5
Synth
T RS EL ( RF )
LNA
Horn
Ante nna(V /H)
or
Omni
Ante nna(V /H)
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