Section 12.
RECEIVER DETECTOR MODULE
CR8
TP5
P1
R1
CR4
CR7
CR9
CR1
CR3
TP11
TP7
TP14
TP6
TP4
TP10
C63B
C66A
R26
C47
C4
DS1
C5
C6
C25
C57A
C58A
TP13
C60B
R2
C62
C67A
TP2
TP3
C67B
C56
C59
TP12
U10
C52
C53
C9
C8
C27
C26
C48
C50
C51
C7
C16
C17
C15
C14
C13
C61A
C61B
C55C
C55A
C64B
C57B
C58B
C24
C22
R90
R84
R79
R51
C69
R67
U8
U1
R72
R85
R81
R89
R88
R83
R82
R80
R78
R76
R75
R77
R55
R10
C2
R11
R12
R44
R61
R43
R49
R48
R46
R50
C55B
R7
C18
R6
R5
R4
R56
R47
R45
R57
R60
R58
R62
R63
R64
R65
R66
R68
R54
R69
R42
R41
R40
R70
R38
R37
R36
R35
R53
R52
R33
R32
R59
R31
R30
R29
R28
R25
R27
R23
R22
R21
R20
R19
U6
J2
R17
R18
R16
R14
R13
R15
R71
R73
R24
R93
TP8
R91
R3
R39
C21
R98
C23
U2
Q1
DPM1
CR2
C65
C66B
C60A
C68
C20
C12
C64A
R74
U9
C3
U5
U7
U3
J1
C63A
C49
C1
R92
TP1
R94
CR10
J3
P2
R95
R97
R96
C70
C71
U11
9785 RX DETECTOR ECB NO. 106518 REV D
1999 RFL ELECTRONICS INC., BOONTON, NJ, U.S.A.
LEVEL
NOTCH
LOWER
RIPPLE
NOTCH
UPPER
CENTER
NULL
LEVEL
32
A
C
1
+
1
R34
10
1
+
1
+
C
B
A
Figure 12-1. RFL 9785 Receiver Detector Module
12.1
DESCRIPTION
The RFL 9785 Receiver Detector Module (Fig. 12-1) contains three elements of the RFL 9785's
receiving system:
1.
A narrowband active band-pass filter that sets the bandpass limits for the entire receiving section.
2.
A carrier detect circuit used to signal the AM Logic module that a signal is being received.
3.
A signal level indicator with a digital meter to indicate deviation of the received signal above or
below the specified normal level.
4.
An optional voice filter when the RFL 9785 voice option is used.
NOTE
The dotted area in Figure 12-1 indicates the location of the Voice Filter when the RFL 9785
voice option is used. The Voice Filter plugs into connectors J1 and J2 within the dotted area
of Figure 12-1. Refer to Section 14 for information on the Voice Module and the voice filter.
For specific component information at the board level please contact the factory with the board
part number and revision level.
Receiver Detector Module Schematics are provided at the end of
this section.
RFL 9785
RFL Electronics Inc.
July 7, 2006
12-1
(973) 334-3100