The Sat-Schneider DRT1 The DRT1 is a high-performance RF- tuner unit with an input frequency ranging from 10 kHz to 30 MHz. It was designed for software-defined receiver concepts using an A/D conversion at the 2nd IF output at 12kHz standard. So a PC standard soundcard may be used as an A/D converter by example. Other customer-specific IF output frequencies than 12 kHz, up to 2 MHz, are easy to implement on request. High selection is provided by means of an 8 pol. crystal filter at 1st IF. The standard bandwidth is 10 kHz, other customer-specific bandwidths are easy to implement on request. The strong linear output peak level together with levelling to high dynamic reserve allows bandwidth tuning by DSP after A/D conversion. The use of a high-level 1st mixer in combination with high linear gain control stages and amplifiers provides excellent overall linearity at all gain values and temperature stability of gain. Low narrowband phase noise of the 14 bit DDS provides compatibility to new digital modulations like DRM or HD Radio with high decoder SNR. For measurement applications, it is recommended to use the onboard reference voltage for VGC generating together with an additional D/A converter. This provides high gain accuracy. The gain response over receiving frequency is very flat. The board layout is designed for direct soldering to a back-plane PCB.
- High-Performance RF Tuner
- Frequency Range: 10 kHz to 30 MHz
- Input ICP3: +13,5dBm, typ.
- Noise Figure @ full gain: 14dB, typ.
- Receiver Factor: -0,5dB, typ.
- Input Impedance: 50 Ohms
- 12 kHz IF output: 1,5Vpp, max.
- Single-Supply Operation: 5V @ 220mA, typ.
- 8pol. Crystal Filter 45,0 MHz BW: 10 kHz
- LO: 14 Bit DDS tuning steps < 1mHz
- Long Time-Frequency Stability: 5ppm/ 5 years
- High stability of Gain Control
- Reference Voltage Output: 2,5V
- Highest gain independent Linearity
- Long Lifetime due to lack of Electrolytic Capacitors
- Small geometrical Dimensions
|Freq. Range:||50 KHz – 28 MHz, steps 1 KHz, steps until 0,1 Hz possible on request|
|Freq. Accuracy:||+-1,5ppm ex factory at 25°C|
|additional +-5ppm over full TCXO temperature range –20°C to +80°C|
|additional aging +-3ppm /5years|
|Output Signal:||Baseband at final transmitting frequency, no I/Q outputs|
|Output Level:||0dbm true rms according 10 dBm peak|
|Linearity:||serves ITU limit- curve|
|Precorrection Unit:||internal as option, serves 100W with precorrection or 75W without by use together with our 100W linear DRM power amplifier|
|Power Supply:||internal, 230V ac|
|Dimensions:||19” 2 highness units|
|Output:||50 Ohms N female|
|Audio Input:||Chinch R+L 10 KOhms unsymmetrical|
|optional also 600Ohms symmetrical|
|Remote Control:||Ethernet RJ45|
|Processor:||VIA C3 1000MHz|
|HDD:||1 GB bootable memory card|
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