Smiths Kelvin Hughes Nucleus 3 5000 Series, Системный справочник

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FUNC TIONAL DE SCRIP TION
15 The Master/Slave Interface, Master/Slave Synchro
(for Radar 2 only) and Divide By 4 PCBs may receive
inputs from any two Radars. The Master/Slave Synchro can
accept an input from only one Radar (Radar 2 only). The
Radar selection for the Nucleus range of displays is carried
out on the Nucleus display. The Master/Slave Adapter PCB
is used as the interface to the Display ‘Input/Output PCB’.
Many forms of input are acceptable, enabling interfacing with
other compatible Radar Systems.
16 The Low Ratio Compass PCB receives the input from
a 1:1 or 36:1 ratio Synchro Compass System.
PRE- FITTING CHECKS
17 Prior to installing the interface boards into the Nucleus
Display, check that the signals from the host radars
conform to the formats listed below. If the signals are
different, refer to the Technical Description of the host radar
or Kelvin Hughes to ensure compatibility.
Azi muth Types
Master/Slave Synchro PCB (HRC-A290)
(See Table 5) 3 phase Resolver Excitation 50 to 1200 Hz
sinewave.
2 phase Resolver Excitation 50 to 1200 Hz
sinewave.
2 phase Resolver Excitation 900 to 4000 Hz
squarewave.
Divide by 4 PCB (CDY-A297)
(See Table 7) +3 to 7V pulses. 1024 pulses per rev.
Master/Slave Interface PCB (HRC-A197)
(see Table 9) 2 phase
(No ac excitation) 90 cycles per rev.
+ve Pulses, various
voltages 90 to 360 pulses per rev
(even no.’s only).
+ve Pulses, various
voltages 4096 pulses per rev.
Head ing Line Types
Master/Slave Synchro PCB (HRC-A290)
No Heading line input required (generated on
the PCB).
Divide by 4 PCB (CDY-A297)
See Table 11 +ve or -ve going input pulses
of 4 to 15V from 0V. 1 per rev.
Master/Slave Interface PCB (HRC-A197)
See Table 11 +ve or -ve going input pulses
of 4 to 15V from 0V. 1 per rev.
Video
Nove 5.5V peak from Buffer Amplifier.
May be +ve or -ve 12V from 0V, 75 ohm without Buffer
Amplifier.
Other video levels may be catered for using suitably
modified Buffer Amps:
RAN-A23/** (75 ohm Co-axial input sockets)
or
RAN-A29/** (93 ohm UHF input sockets)
Sync Pulses
Normally +ve 12V from Buffer Amplifier.
May be -ve or +ve 3 to 50V from 0V, 75 ohm without
Buffer Amplifier.
Sync pulse levels of up to 50V, +ve or -ve from 0V,
may be catered for by Buffer Amps RAN-A23/** or
RAN-A29/** without modification.
PRFs
Short Pulse 1500 to 3200 Hz.
Medium Pulse 750 to 1600 Hz.
Long Pulse 375 to 800 Hz.
IN STAL LA TION OF IN TER FACES
18 The Interfaces required are to be installed in the
following order:
(1) Low Ratio Compass Kit (HRC-A188)
(2) Master/Slave Synchro Kit (HRC-A289)
(3) Divide by 4 Kit (CDY-A55)
(4) Master/Slave Interface Kit (HRC-A192)
19
Prior to installation, the pre-fit requisites are to be
established. Each PCB is to be fitted in the order
shown above and links set before the next PCB is fitted.
Figure 3a shows the stacking and arrangement of the PCBs
on the side plate.
Low Ra tio Com pass PCB (CDY A188)
20 Install the Low Ratio Compass PCB as follows:
(1) Fit the required converter chip, refer to Table 13.
(2) Set the Links, refer to Paragraph 57.
(3) Set compass ratio switches, refer to Table 14.
(4) Set the links of the Display System PCB, refer to
Low Ratio Compass PCB in Paragraph 64.
(5) Fit the PCB in the position shown in Figure 3a,
using the pillars provided.
NOTE:
If other interfacing is required, refer to the following
Paragraphs; if no other interfacing is required implement
Paragraph 17.
Original 8a.7 May 01
KH 2020
Chap 8a