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SUPPLEMENT NUMBER: SU-10073-6910A
TO
PUBLICATION NUMBER: 10073-0020
Copyright @ 1983
By Harris Corporation
All Rights Reserved
HARRIS CORPORATION RF COMMUNICATIONS GROUP
1-- 1680 University Avenue Rochester, New York 14610 U.S.A.
Tel: 716-244-5830 Cable: RFCOM; Rochester, N.Y. TELEX: 978464
m HARRIS
RF COMMUNICATIONS
TABLE OF CONTENTS
Paragraph Page
PartsList
Functional
RF-553-01 Description.
Remote Control Adapter General Description. 1
2 1
3 1
LIST OF FIGURES
Figure
1-
1 A24
A24Schematic
A24 Component
A241nterfacePWBLocationInterface
InterconnectCableAssembly(10073-6917) PWB DiagramLocation Interconnect (10073-6901)
( 10073-6900) Diagram. 2
2 3
3 5
:- 4 7
5 8
f~
LIST OF TABLES
1'-- Table
1 I n/Out
Interconnect Cable
A24lnterfacePWBPartsList. Cable
Assembly Parts PartsList. List 9
1-
2 9
3 9
~
J-
iii/iv
m HARRI S
RF COMMUNICATIONS
RF-553-01 REMOTE CONTROL ADAPTER GENERAL DESCRIPTION
The RF-553-01 Remote Control Adapter enables the RF.551A/552 Preselector to be remotely controlled
by the RF-590 Receiver. This option consists of A24 Interface PWB (10073-6900) and necessary intercon-
necting cables and connectors.
The A24 Interface PWB (10073-6900) is ured to convert serial data from the RF-590 to parallel data for
use with either preselector. Serial data is supplied to J2 of A24 Interface PWB from A 14 Control PWB
through W21. Parallel data to the remote preselector is sent through Interconnect Cable W41
(10073-6917) from J9 on the rear panel of the R F-590 Receiver. Figure 1 shows the location of the A24
Interface PWB on the RF-590 Receiver Chassis.
2. FUNCTIONAL DESCR IPTION
Refer to the component location diagram, figure 2; schematic diagram, figure 3; Interface (A24) I ntercon-
nect diagram, figure 4; and Interconnect Cable diagram, figure 5 through this discussion.
Upon initial turn on of the RF-S90, R10, C13 and inverter U7 produce the trailing-edge-triggering for US.
US enables the shift registers U1, U2, and U3 and gated buffers U4, US, and U6 to load frequency informa-
tion to the pre,selec;tor.
Serial data from'the RF-590 is clocked into U1, U2, and U3 and latched with strobe 1. US is a retrigger-
able one shot that enables frequency information to be sent to the preselector ~ 1 second after a frequency
change. When a frequency change is made, strobe 2 is generated causing US to disable the shift registers
while data is being loaded. Once data is loaded and strobe 2 remains in a low state, US 5:A. enables the
shift registers after a one second delay set by C9, R 1 time constant.
If frequency changes are made at less than one second intervals, the preselector will not respond. A bypass
signal is provided for system applications. There is no bypass mode in the RF-551/552 Preselector, a
large degradation in sensitivity will be noted for a large frequency change due to the one second delay of
frequency information to the preselector.
US OB signal is delayed 0.1 milliseconds by R7 and C4 to allow frequency information to be loaded into
U4, US, and US from the shift registers. RS and CS produce a 1 millisecond delay before U4, US, and US
are latched holding the frequency data to the preselector.
3. PARTS LIST
Table 1 is a comprehensive parts list for the A24 Interface PWB Assembly. Tables 2 and 3 are the parts
lists for the cable assemblies used in this option.
1
1
m HARRIS
RF COMMUNICATIONS .1;
-1
I
.
t
I
t
t
I
I
t
I
Figure 1. A24 Interface PWB Location
2
m HARRIS
RF COMMUNICATIONS
Figure 2. A24 Component Location (10073-6900)
3/4
m HARRIS
RF COMMUNICATIONS
J1 W43Pl
+5V
UN REG. 1 TO A 16A2
REAR POWER DISTRIBUTION
2 2
ASSY
3 3
GND 4 4
5 S
J2 W41IP1
J9-1
GND 1 ! 1 Jg
REAR PANEL
2MHZ 2 2
ASSY
1 MHZ 3 3
4MHZ 4 4
20 MHZ 5 5
'&
8 MHZ 6 6
10 MHZ 7 7
8 8
9 9
J9-26
BYPASS 10 10
8 KHZ 11 11
100 KHZ 12 12
4 KHZ 13 13
200 KHZ 14 14
80 KHZ 15 15
10 KHZ 16 16
2 KHZ 17 17
18 18
J9-13
1 KHZ 19 19
.19.31
20 KHZ 20 20
~
40 KHZ 21 21
400 KHZ 22 22
23 23
J9-33
800 KHZ 24 24
25 25
26 26
J3 W21P6
INDEX 1 1
DATA 2 2 A14
STROBE 2 3 3
/1 CONTROLBOARO
ASSY
ClOCK 4 4
STROBE 1 5 5 :::=.=?
Figure 4. Interface (A24) Interconnect Diagram
'7
m HARRIS
RF COMMUNICATIONS
., --,
P2 P1
t I "";"[
I
I
I
2 Q
3
4 I
5 u
6
7 s
8
9 E
tO I D
tt I
I
J
t2 C
13 B
14 H
1~
16
17
18
19 i
201
,
21
22 p
23 R
24 !
T
25
26
27 K
28 L
29 F
30
31 G
32 M
33 N
34
35
36
37
Figure 5. Interconnect Cable Assembly Diagram
8
m HARRIS
RF COMMUNICATIONS
Table 1. A241nterface PWB Parts List
Ref. Desig. Part No. Description
10073-6900 Interface PWB Assembly
C1-CS CK06BX104K Capacitor, Ceramic, 1 u F, 100 V
cg C26-0016-330 Capacitor, 33 u F
C10 C26-0025-339 Capacitor, 3.3 uF
C11, C12 CK06BX104K Capacitor, Ceramic, 1 uF, 100 V
C13 C26-0016-330 Capacitor, 33 u F
J1 J46-0032-005 Connector, 5 Pin
J2 J46-0031-026 Connector, 26 Pin
J3 J46-0032-005 Connector, 5 Pin
L1 - MS75085-13 Coil
R1 R65-0003-303 Resistor, Carbon, Film, 30K, 1/4 W, 5%
R2-R4 R65-0003-473 Resistor, Carbon, Film, 47K, 1/4 W, 5%
R5, Re R65-0003-103 Resistor, Carbon, Film, 10K, 1/4 W, 5%
R7 R65-0003-102 Resistor, Carbon, Film, 1K, 1/4W, 5%
RS-R10 R65-0003-473 Resistor, Carbon, Film, 47K, 1/4W, 5%
U1-U3 101-0000.156 Integrated Circuit, CMOS, CD4094BE
U4-Ue 105-0000.373 Integrated Circuit, 74LS373
U7 f{)1-0000.018 Hex Inverter -Buffer
US 101-0000.353 Dual Monostable, CD4538BEX
Table 2. In/Output Cable Assembly Parts List
Table 3. Interconnect Cable Parts List
9/10
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