Overview of direction finders (DF)

 
RT-202
RT-300
RT-500-M
RT-600
RT-1000
 
 
MOB DF
Dual band
radio DF
Multi band DF
Airborne
Multi band DF
ATC/VTS
bearing system
   
VS**
VU**
      
           
Emergency alert function
X
X
X
X
X
Selective alarm function
(distress signals only)
X
X
X
X
X
Transmitter code indication possible
X
X
X
             
Emergency frequencies
Monitoring during use of other frequencies or channels		 121.500
X
X
X
X
X
243.000
X
X
406.025
X
Channel 16
X
X
X
Frequency
Band (MHz)		 VHF-Air band
121.65 *
118.8-
124.0
118.0-
124.0
118.8-
124.0
118.8-
122.9
118.00-
136.975
VHF-Marine band
156.0-
162.3
156.0-
162.1
156.0-
157.9
156.00-
174.00
UHF-Air band
241.0-
245.0
241.0-
245.0
241.0-
245.9
Cospas / Sarsat
400.0-
409.9
400.0-
409.9
             
Interfaces RS 232
X
X
X
X
X
RS 486
X
RS 422 NMEA
X
X
Ethernet LAN
X
             
Display Angle
presentation
LED Dot.
Circle 10°
LED Dot.
Circle and
LCD Display
TFT shows RMI Circle
LCD Display
2 conc. circles
of LED points;
3 digit dig.
LED-Display
Self bearing suspension
X
X
X
Bearing modes
Relative
Relative /
Magnetic /
True
Relative /
Magnetic /
True
Relative
(to the airplane
roll-axis)
QDM; QDR;
relative;
magnetic
Bearing accuracy (RMS)****
< +/- 5°
< +/- 5°
(<± 2° optional)
< +/- 5°
(<± 2° optional)
< +/- 5°
< +/- 2°
Resolution
10° at Dot. Circle, 
2° Digital***
10° at Dot.
Circle
1° Graphic
1° at RMI
Circle
1° Graphic
1° digital
display
10° at Dot.
Circle 1 °
dig. display
Sensitivity
≤ 150 nV
≤ 50 nV
≤100 nV 
≤150 nV at
406MHz
≤100 nV
≤150 nV at
406MHz
< 1µV
Time of response
≤50 ms
≤ 50 ms
≤ 50 ms
≤ 50 ms
< 300ms
Audio output
X
X
X
X
500 mW 4 to 8 Ω
Audio Line out
X
600 Ω,
balanced,
0 dBm,
m = 0.6
Internal speaker
X
X
X
X
             
Technical
Data 		Supply Voltage
12-24 V DC
12-24 V DC
12-24 V DC
12-35 V DC
115/230 V AC
24V DC
power consumption
10 VA max.
10 VA max.
30VA max.
7.5 VA max.
25 VA max
Type of protection
IP 67
IP 67
IP 67
IP 67
Display
Dimensions mm
120x100x55
220x113x25
220x113x62
82x82x43
19’’ / 3 UH,
desktop or
rack mount.
Antenna Dimensions mm
Ø 260x600
Ø 260x600
Ø 201x397/810
Ø 270x185
Ø 400x1120
Display/Antenna weight in g
600 / 1400
700 / 1400
1200 / 5200
250 / 2000
see data sheet
             
Accessories Internal compass
2 axis or
3 axis available
Slave display
on request
X
X
X
Man pack possible
X
             
Applications  
MOB,
SAR
MOB, SAR,
VTC,
Communication
MOB, SAR,
VTC,
Communication
Airborne
SAR
ATC,
VTS

* Other frequency +/- 2 MHz possible
** Other frequency band upon request
*** Digital output at the Interface
**** Undisturbed wave field and sufficient field strength proposed. Measuring by changing the angle of incidence, bearing antenna rotating on a revolving table in order to eliminate environmental influences on the bearing result.