Rhotheta RT-300 - 4 Technical Data; Electrical Characteristics

User Manual Bearing System RT-300
Issue: 2017/06/27 [Rev 1.04.c] Page 13 of 79 12-9-1-0013-9-2-0001-3-1-60
4 Technical Data
4.1 Electrical Characteristics
Designation Value Remarks
Bearing principle Doppler 3 kHz rotational frequency,
delay time compensation
Direction of bearing
reference, digital display
- REL
- MAG
- TRU
- to antenna direction
- relative to magnetic north
- relative to geographic north
Direction of bearing
reference
LED-circle
relative - to antenna direction
bearing error
<  5°
In undisturbed wave field,
sufficient field strength
assumed, signal without
modulation.
Resolution
Digital display
LED-circle
1°
10°
LC-graphic-display 98x32 dots brightness and contrast
adjustable
Sensitivity
Airband: ≤ 0,5 µV/m
Frequency range
VHF Airband:
UHF Airband:
118,800 ... 124,000 MHz
241,000 … 245,000 MHz
Channel pattern 25 KHz
Bearable types of
modulation
A3E; F3E, A3X (ELT-
modulation)
bearing largely independent of
type of modulation
Polarisation vertical
Polarisation error
≤5°
at 60° rotation of field vector
Cone of silence ca. 30° to the vertical
time of response
 300 ms
depending on field strength of
signal
Audio-output max. 1,5 W at 4 Ohm
operating temperature
range
DCU: -20° ... +60° C
AU: -40° ... +60° C
at low temperatures running in
time up to 5 minutes
Range of operating
voltage
12 … 28 Volt DC