User manual: Installation and Operation of Direction Finder System RHOTHETA RT-600 / SAR-DF 517
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5 Technical Data
5.1 Electric features
Method of bearing:
Doppler-principle (3 kHz rotational frequency, right / left rotation)
Bearing accuracy
1
:
± 5°
Internal resolution:
1°
Sensitivity:
RF-Voltage at Receiver Input (50
Ω
):
VHF < 100 nV; Maritime Band < 100 nV; UHF < 100 nV; 406 MHz < 150 nV
LoJack < 100 nV, ETS < 200 nV, Med Track < 200 nV
Frequency stability:
±2.0 ppm (
∆
f/f = ±2
·
10
-6
) [at Temperature range –30 °C…+80 °C]
Receiving channels:
15/18 (five of them are free adjustable)
Receiving frequencies:
(or see type plate for
special customer
options)
Standard Version
Law Enforcement Version
118.000 ... 123.975 MHz
118.000 ... 123.975 MHz
156.000 ... 162.975 MHz
164.000 ... 174.000 MHz
240.000 ... 246.000 MHz
201.000 ... 220.000 MHz
400.000 ... 410.000 MHz
400.000 ... 410.000 MHz
Special Scanning
modes:
LE version: automatic scanning for LoJack and ETS signals
Standard version: complete maritime ship band scanning within 3 sec
COSPAS-SARSAT
Frequencies
Channel A…S / 406.022 … 406.076 MHz
COSPAS-SARSAT
fast scan mode
Full automatic detection of any active COSPAS-SARSAT channel A…S within
400 msec
COSPAS-SARSAT
analysis:
Reception and analysis / decoding of COSPAS-SARSAT data signals (112 Bit
(short message) resp. 144 Bit (long message), 400 baud, biphase L encoded,
phase modulation, with Bose-Chaudhuri-Hocquenghem error-correcting code /
specified in accordance to COSPAS-SARSAT C/S T.001 October 1999)
Bearable
kinds
of
modulation:
A3E, F3E, A2X (ELT-modulation), F1D, G2D, COSPAS-SARSAT
bearing largely independent of modulation.
Polarization:
Vertical
Error of polarization :
≤
5° at 60° field vector rotation
Garbling cone:
Ca. 30° to the vertical
Time of response:
2
:
≤
20 ms (with sufficient receiving field strength)
LC-graphic display
128 x 64 dots, supertwist / transflective, extended range of temperature, dark-blue
display on yellow-green background, background light.
Freely adjustable (exponential) dimming of brightness
Supply voltage range:
12 V to 35 V DC
Current consumption:
LCD-background light Off:
max. 350 mA (12 V DC) / 200 mA (24 V DC)
LCD-background light 100 %: max. 600 mA (12 V DC) / 300 mA (24 V DC)
1
Undisturbed wave field and sufficient field strength proposed. Measuring by changing the angle of incidence, the bearing antenna rotates
on a revolving table in order to eliminate influences of environment to the bearing result.
2
Very weak signals can considerably increase the time of response!
