With the DiRaSelect 300 we expand our product
range of receiver accessories by an additional component. Via USB up to three
different receiving antennas from 9 kHz - 300 MHz can be switched loss-free
to one output socket.
Additionally it is possible to combine all three input channels according to
your individual needs. The selected channels are added as in-phase signals.
Hereby it is possible to find always the best combination of antennas when
receiving conditions are difficult.
Due to the elemination of mechanic components like relays, channel switching
is purely elctronic switching using active components. So above average intermodulation
values (IP3:+40 dBm at 7MHz typical) and extremely high reverse isolation values
are achieved. The electronics are installed in strong aluminum profile housing.
The HF-inputs are BNC and are protected against short and pulse-shaped voltage
surges with complex ESD protection circuits. Because the voltage supply is
integrated via USB, there is no need for an additional power supply, which
makes the ASM300 ideal for portable operation.
- Radio Monitoring
- Receiver Comparisons
- Laboratory and
Control software AJ10Mini:
The small control panel allows switching
between the three antenna inputs (Antenna Swich) and also individual combining
This software is freely available and registration
is not necessary. It is equally suitable for the NTi DiRaRelect 300 as well
as for the technically identical AntennaJet ASM300 from Bonito.
Input frequency range: 9KHz - 300MHz (-1dB)
Output connector / impedance: BNC / 50 Ohms (DC blocked max. 50V)
ESD input protection: 30KV; max. pulse power 350W (8/20µs)
Max. allowed input power: 0dBm
INput connectors / impedance: BNC / 50 Ohms (DC blocked max. 50V)
Isolation between inputs:
80dB typ. <0.3MHz
70dB typ. <1MHz
55dB typ. < 30MHz
45dB typ. <100MHz
40dB typ. <300MHz
Isolation between output and input (reverse
110dB typ. <0.3MHz
100dB typ. <1MHz
80dB typ. <30MHz
65dB typ. <100MHz
40dB typ. <300MHz
Amplitude frequency response: (300KHz -
300MHz): max. 1dB typ.
Amplitude difference between inputs: max.
Third-order intercept point IP3:
+40dBm typ. <10MHz
+20dBm typ. >100MHz
Power supply connector: Type-B USB jack
Current consumption: max.50mA (5V DC)
Working temperature range: 0 - 40°C (without condensation)
Height / Weight: 115 x 90 x 32mm / 0.30kg
USB A/B cable (shielded with ferrite cores)
The control software AJ10Mini for Windows
7 & 8, Vista & Windows XP can be downloaded directly.
It is also available on CD-ROM
Other items you
might find interesting:
DiRaWave 032 ( Semi-professional USB-controlled Shortwave Receiver
40KHz - 30MHz )
300 ( 3 Way Active Antenna Splitter 9KHz - 300MHz)