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useful for those who want to study radar.
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SMR SPECIFICATION
Transmitter characteristics The SCANTER 2001 configured with Frequency Diversity is available with X-band transmitter characteristics, as listed in table.
Table :Transmitter characteristics
PRF, Pulse Widths and IF bandwidths PW ranges versus PRF and IF bandwidths are given in the Table
Table : Pulse Widths
IF Centre Frequency: 100 MHz
PRF stagger :Pseudo random stagger is available in programmable modes (selectable as set-up and service settings).
0% stagger No staggering2% stagger From +2 to -2% from nominal PRI in 7 step 4% stagger From +4 to -
4% from nominal PRI in 7 steps 8% stagger From +8 to -
8% from nominal PRI in 7 steps
Sector transmission
In Sector Transmission, the defined sector is the transmit or prohibit part.
Number of sectors 4Sector bearing: 0-359°Sector width: 10-350°Resolution: 1°
Note that antenna squint may reduce useable sector by the squint angle (typically 2°)
Pulse ParametersThe output Pulse Characteristics are defined as shown in the figure .The RF output pulse from the magnetron is programmable within the following limits:
Pulse Width, step size 10 nsPulse Width, tolerance ±10 ns, PW ≤ 100 ns,±10%, PW ≥ 100 ns±10%, PW = 40 ns (SMR applications only)Rise Time (Tr) < 20 nsFall Time (Tf) < 40 ns,< 30 ns, PW = 40 ns (SMR applications only)Max. Droop 20 % at 1000 ns
ReceiverTuning range :
The receiver tuning ranges for the product range are:X-band 9.100 - 9.300 GHz 9.300 - 9.500 GHz
Noise Figure and Image Rejection:Noise Figure of the X band receivers:
Receiver Noise Floor
The thermal noise at the receiver input and the receiver Noise Figure determines the receiver noise floor.NOISE _ FLOOR = −114 + NFov + 10 log10 ( BW [MHz])[dBm]From this expression, the noise floor can be computed for the various receiver band-widths.
Table: Receiver noise floor versus bandwidth
Dynamic characteristics
The Noise Floor, the STC characteristics and the Log amplifier characteristics
determine the dynamic characteristics.Receiver overall dynamic range: ≥ 125 dB including STC/ASC:Limiter RF attenuation (STC /ASC) ≥ 45 dB
Power and Noise Figure MonitoringForward Power monitoringMeasurement range 0-50 kWAlarm level 0-30 kW, programmableNoise Figure MonitoringMeasurement range 2-15 dBWarning level Noise Figure > 5.0 dBError level Noise Figure > 7.5 dB
Signal and Clutter ProcessingVP3 functions
A/D Conversion Resolution 8-bit Sample rate 80 MHzNoise Cancellation Sweep to sweep correlation 3 out of 4, full 8 bit resolution on output Pulse width discrimination < 25 ns when using Tx pulses up to 60 ns < 50 ns when using Tx pulses above 60 ns Processing range 0-64 NM (default mode, 7.5 m correlation cellsize) 0-128 NM (long range mode, 15 m correlation cellsize), The mode is programmable during installation.FTC Time constant 0.1 to 20 ∝s, special filter algorithm Sample Rate Decimation (after FTC) Decimation factors 1, 2, 4 and 8.
Sweep Memory Memory depth (one sweep) 32 K samples Memory width (each channel) 1024 sweeps Output data rate / Re-timing Output rates 10, 20, and 40 MHz Retiming factors 1,2,4,8, programmable Note that the maximum output rate is 40 MHz, meaning that the input sample rate of 80 MHz must be decimated, or the output must be re-timed.
Static Clutter Map (Inland VTS and Airport SMR)
The Static Clutter Map is available for stationary applications, typically airports, andwill provide programmable adaptation land clutter levels.
Instrumented Range 0 - 6000 mAttenuation Map Number of cells 32 k Cell size, range 23,976 m Cell size, azimuth 2.813 ° Resolution 8 bit, 0 to 50 dB of attenuation range spread out on 256 stepsBlanking Map Number of cells 512 k Cell size Range 5.994 m Cell size Azimuth 0.703 °
Max PRF 8064 Hz Max RPM 60
Application and Site specific functions
Built-in Antenna motor control :
Table : Built-in motor controllers
Directional couplers (SMR)
Coupling:Forward - 30 dBReverse - 20 dBIndividual calibration sheets are provided with each delivery.
INTERFACES : Antenna InterfaceInput from Azimuth Encoder:
Antenna rotation rate 5 to 66 RPM (6-60 RPM nominal speed)Pulses per revolution 4096 or 8192 ACP’s + 1 ARPPulse widths ACP≥1 µs, ARP ≥ 1 µsFormat 2 sets of balanced line, RS-422Encoder Supply + 5.7 V +/- 5 %, max 500 mA,
Diode coupled and short circuit protected. Specified voltage is prior to built-
in diode.
As standard, a Terma Antenna system provides 8192 ACP’s + 1 ARP per revolution.
The Transceivers are able to provide ACP rates as the input or divide by two
Turning Unit (Motor & Gearbox) sensors:
Contact inputs:Common functions Motor overheat (warning) Motor overheat (protection) High temperature, gear
Additional function used in SMR Low oil level warningMechanism Open/closed contacts, 20 mA current loop
Antenna Polarisation Switch Control Output:
Voltage 28 ±3 V
Current source capacityUp to 3A pulse for 1-3 seconds
Functionality +28 V to output 1, for circular
+28 V to output 2, for horizontal
+28 V to output 3, for vertical
Pulse supply to change state.
Each line is with diode in series for parallel coupling.
Azimuth Output :
The output follows the input of the azimuth encoder, being 4096/8192 clock pulses
(de-pendent of type), with 12/13 bits resolution of azimuth information (ACP), as a
serial string as well as 1 ARP for each antenna revolution.No of outputs 4Antenna rotation rate as inputPulses per revolution as the input or divide ACP’s by twoPulse widths ACP ≥10 µs, ARP≥10µsFormat 2 * balanced line, RS-422
Trigger Output :
No of outputs 5, each programmable to supply T0, PPI, Pre-trigger, or
B trigger.Amplitude +8 ±1 VDrive capacity 75 ohm nominal loadPulse width ≥ 1.0 µsFunctionality Trigger point at low-to-high transitionRise time ≤ 180 ns (10-90%)
Analogue Video Output:No of outputs 4 each programmable to supply Processed, Test or Ex- ternal video.Level 0V to +1V @ 50 ohm nominal load 0V to +5V @ 75 ohm nominal load Individually selectable for each outputDC level ≤ +/- 0.05V (1 V output) ≤ +/- 0.5 V (5 V output)
Digital Video Output:No of outputs 3 each programmable to supply RS-422 / EIA-644 formVideo Amplitude resolution 8 bitsFormat 12 * differential lines 8-bit data + status outputs. RS-422, max 10 MHz output rate EIA-644 (LVDS), max 40 MHz output rateCable Max 10 meter long, type to follow installation documenta- tion.The output rate follows VP 3. (Limited to 10 MHz if any output is in RS422 format)
External Trigger Input (Sync)Amplitude 5-15 V positive pulseImpedance 75 ohm nominal loadPulse width ≥ 0.1 µsData communicationData communication lines are available for control and remote service as well as for interfaces to other units within a system.Serial data linesNo. of serial communication lines 3 per Transceiver for external communication 1 per Transceiver, reserved for communication between TransceiversInterface level RS-422A / RS-232Baud rate Selectable, 1200 / 2400 / 4800 / 9600 / 19200 / 38400 / 57600Character Selectable, even / odd / no parity and 1 / 2 stop bitsProtocols Terma 262020 SI
It is recommended to use a data rate of 57600 baud in connection with the protocol de-fined by Terma 262020 SI
LAN communication lines:No. of LAN communication lines 1 per TransceiverTCP/IP sockets 4 per LAN communication lineType 10 BaseT / 100BaseTX (twisted-
pair)EthernetProtocols: Terma 262021 DI SNTP (Time synchronisation)
Auxiliary Inputs:Number of inputs 4 per TransceiverFormat
20 mA current loop for external contactsLevel Floating
Auxiliary Outputs:Number of outputs 4 per TransceiverFormat Relay contactLevel Floating
Safety LoopContact input:Functions 1) Safety (man aloft switch)Mechanism Open/closed contacts, 20 mA current loop
Mains Power SupplyEach transceiver have separate mains supply
Voltage 115-242 V AC +8/-10%Frequency 47-63 HzPower
Max 350 VA, per Transceiver unit (exclud- ing Antenna Motor Power)Power factor Cos φ ≥ 0.90, transmitting Cos φ ≥ 0.80, non-transmitting
RELIABILITY AND SAFETY
MTBF(Mean Time Between Failure):For each Transceiver, demonstrated unit MTBF exceeds:20.000 hours (Ground Benign conditions)10.000 hours (Naval Sheltered conditions)
Magnetron Life:Magnetron lifetime is guaranteed for at least 3000 hours of operation from MagnetronSupplier.However, depending on operational conditions, practical experience shows that sub-stantially longer operational lifetime can be expected.
Safety LevelSafety level according to: IEC 1508, SIL 1 (during design and life cycle) IEC950, UL, CSA
Figure : Experienced magnetron life
ENVIRONMENTAL SPECIFICATIONS
Temperature limit as a function of PRF