FUNC TIONAL DE SCRIP TION
Low Ra tio Com pass PCB
68
The PCB accepts inputs from Synchro Compass
systems with ratios between 1:1 and 128:1. The
normal ratios used are 1:1, 36:1 and 90:1. Nucleus systems
can cater for 90:1 without this Low Ratio Compass PCB.
Mas ter/ Slave Adapter PCB
69
The PCB mainly comprises a number of Plugs, which
provide interconnections between the Master/Slave
PCBs, (if fitted, the Synchro Compass PCB), the Tx/Rx’s and
the Display System.
Mas ter/Slave In ter face PCB
70
The Master/Slave Interface PCB takes inputs of
Azimuth, Heading Line, Video and Sync from two
Radars and converts the inputs to the standard Display
requirements. The selection of Radar 1 or Radar 2 is
controlled from the Display.
NOTE:
(1) If Radar 2 has a Synchro or Resolver Azimuth, the
Synchro/Compass PCB must be used in addition to the
Master/Slave Interface PCB.
(2) If Radar 1 and/or 2 is 1024 pulse Azimuth the Divide by
4 PCB must be used in addition to the Master/Slave
Interface PCB.
Switches
71
The switch functions on the Master/Slave Interface
PCB are as follows:
(1) SW1 sets the division ratio for Radar 1 Azimuth,
using PLL.
(2) SW2 sets the division ratio for Radar 2 Azimuth,
using PLL.
(3) SW3 sets the Radar 1 Video for + ve or - ve signal.
(4) SW4 sets the Radar 2 Video for + ve or - ve signal.
Po ten ti ome ters
72
The potentiometer functions on the Master/Slave
Interface PCB are as follows:
(1) RV1, Radar 1 Video input to give +ve 5.5V
standard Video.
(2) RV2, Radar 1 Noise Level threshold for high noise
inputs.
(3) RV3, Radar 2 Video input to give +ve 5.5V
standard Video.
(4) RV4, Radar 2 Noise Level threshold for high noise
inputs.
(5) RV5, Radar 1 lock Delay.
(6) RV6, Radar 2 Lock Delay.
Mas ter/Slave Syn chro PCB Ra dar 2 only.
73
The PCB receives the input from a radar with 1:1
Synchro or Resolver azimuth transmission, and
converts it to 4096 pulses per aerial revolution for the
Master/Slave Interface PCB. The PCB also produces the
Heading Line.
Links And Switches
74
Links 1 to 6 are normally MADE for Nucleus fittings,
unless Table 5 indicates otherwise. The links may be
changed to vary the input voltage range of the PCB.
75
Switches 1 to 3 are used to adjust the Heading Line to
the correct angle.
(1) SW1, adjusts in 22.5 degree steps.
(2) SW2, adjusts in 1.4 degree steps.
(3) SW3, adjusts in 0.088 degree steps.
(4) Zero correction is with all switches in the F
position.
Di vide By 4 PCB
76
The PCB receives inputs of 1024 pulses per
revolution, from either Radar 1 or Radar 2, and divides
the input to produce 256 pulses per revolution for the
Master/Slave Interface PCB. The board also produces
Heading Line alignment correction.
Original
8a.19
May 01
KH 2020
Chap 8a
Summary of Contents for Kelvin Hughes Nucleus 3 5000 Series
Page 27: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 ii Amdt 1 KH 2020 Index Introduction ...
Page 73: ...THIS PAGE IS INTENTIONALLY BLANK KH 2020 Chap 2a July 03 2a 6 Amdt 5 ...
Page 101: ...THIS PAGE IS INTENTIONALLY BLANK May 01 3 6 Original KH 2020 Chap 3 ...
Page 109: ...THIS PAGE INTENTIONALLY BLANK July 03 viii Amdt 5 KH 2020 Index Chap 1 3 ...
Page 119: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 x Amdt 1 KH 2020 Contents Chap 4 5 ...
Page 150: ...THIS PAGE IS INTENTIONALLY BLANK May 01 4b 12 Original KH 2020 Chap 4b ...
Page 157: ...THIS PAGE IS INTENTIONALLY BLANK May 01 4c 6 Original KH 2020 Chap 4c ...
Page 163: ...THIS PAGE IS INTENTIONALLY BLANK May 01 4c 14 Original KH 2020 Chap 4c ...
Page 176: ...THIS PAGE IS INTENTIONALLY BLANK May 01 4c 28 Original KH 2020 Chap 4c ...
Page 234: ...THIS PAGE IS INTENTIONALLY BLANK May 01 4f 6 Original KH 2020 Chap 4f ...
Page 257: ...THIS PAGE IS INTENTIONALLY BLANK May 01 4f 30 Original KH 2020 Chap 4f ...
Page 275: ...THIS PAGE IS INTENTIONALLY BLANK July 03 5 18 Amdt 5 KH 2020 Chap 5 ...
Page 279: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 iv Amdt 1 KH 2020 Index Chap 4 5 ...
Page 309: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 xiv Amdt 1 KH 2020 Contents Chap 7 8 ...
Page 356: ...Original 7c 19 May 01 KH 2020 Chap 7c CD 2413 Figure 16c Modulator PCB Switches Test Points ...
Page 359: ...THIS PAGE IS INTENTIONALLY BLANK May 01 7c 22 Original KH 2020 Chap 7c ...
Page 381: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 7d 26 Amdt 1 KH 2020 Chap 7d ...
Page 425: ...THIS PAGE IS INTENTIONALLY BLANK May 01 8a 22 Original KH 2020 Chap 8a ...
Page 445: ...THIS PAGE INTENTIONALLY BLANK July 03 8aA 16 Amdt 5 KH 2020 Chap 8a Annex A ...
Page 463: ...THIS PAGE IS INTENTIONALLY BLANK May 01 8c 12 Original KH 2020 Chap 8c ...
Page 472: ...THIS PAGE IS INTENTIONALLY BLANK May 01 8c 22 Original KH 2020 Chap 8c ...
Page 476: ...THIS PAGE IS INTENTIONALLY BLANK May 01 8d 4 Original KH 2020 Chap 8d ...
Page 498: ...THIS PAGE IS INTENTIONALLY BLANK Original 8e 19 May 01 KH 2020 Chap 8e ...