RFL 9780 RFL Electronics Inc.
April 8, 2003 13-1 (973) 334-3100
SECTION 13. CARRIER LEVEL INDICATOR MODULE
R95
TP1
P1
R1
C15
C51
C14
C30
C12
U1
TP3
C33
C28
C1
R73
CR2
C27
C16
U4
R58
C41
U6
DS1
R99
U5
Q1
R37
Q2
R94
R55
R2
R69
R44
R45
R43
R29
R46
R47
R49
R48
R51
R52
R50
R53
R54
R56
R57
R59
R61
R60
R62
R63
R65
R68
R77
R78
R33
R32
R35
R36
R38
R39
R40
R42
R4
R3
R6
R5
R7
R8
R9
R10
R12
R13
R14
R85
R15
R16
R84
R81
R82
R20
R19
R18
R21
R22
R83
R24
R25
C2
R26
R27
R28
R64
R66
R67
R75
R71
R72
R74
R41
R80
R79
R87
R86
R88
R93
C32
C42
C46
C45
C47
C3
C6
C7
C10
C48
C36
C31
R91
U2
U3
TP4
TP2
C35
C39
C40
C26
C29
C43
C8
C13
C24
C25
C5
C4
C44
CR3
R89
CR1
CR9
CR7
CR4
C49
CR8
R11
R30
R17 R106
R23
C22
R76
U7
CR6
U8
TP5
R90
C50
TP6
TP7
C23
TP8
R92
C34
DPM1
J2
P2
U9
R96
R97
R98
J1
C52
C53
9780 CLI ECB NO. 106488 REV D
10W
3W
1W
F.S.
METER
RIPPLE
LEVEL
FILTER
NOTCH
LOWER
NOTCH
UPPER
PASS BAND
CENTER
RFL ELECTRONICS INC., BOONTON, NJ, U.S.A.
NULLLEVEL
32
AC
1
+
+
+
+
10
1
C
B
A
Figure 13-1. RFL 9780 Carrier Level Indicator Module
13.1 DESCRIPTION
The RFL 9780 Carrier Level Indicator Module (Fig. 13-1) contains three elements of the RFL 9780's
receiving system:
1. A narrowband active band-pass filter that sets the bandpass limits for the entire receiving section.
2. A signal monitoring circuit that initiates an alarm if the received level falls below a set level.
3. A signal level indicator with a digital meter to indicate deviation of the received signal above or
below the specified normal level.
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