communication
The delay lines are designed for signal delay during determined time without notable distortions and for further use of delayed signal.
It has one input and output interdigital transducer (ITD) located on some distance from each other.
SPECIFICATIONS
| Delay line | 7,44µs |
| Central frequency | 140 MHz |
| Bandwidth | 20 MHz |
| Losses within the bandwidth | 15 dB |
The module is designed for operation in communication systems using pseudonoise signals, which guarantees high reliability, noise-immunity,and secrecy of the transmitted information.
Correlation processing of radio signals carries out by SAW convolver in real time.
Correlation procession module includes electronic circuits which form the PSK reference signal and generate output signals in form of logical «1» or «0» levels (depending on existence or absence of correlation).
Two modifications are produced CPD-01 and CPD-02.
The general parameters CPD-01, CPD-02 and AKH — 01, AKH — 02 is identical.
| Advantages: -high speed processing; -low power consumption; -small overall dimensions |
| Maximum input signal | 100mV |
| Phase-shift keying carrier frequency signal level | (30 ± 2) mV |
| Dynamic range no less than | 35dB |
| Reference data signal | TTL levels |
| Output signal | TTL levels |
| DC Supply voltage | 12V |
| Wight | 300g |
| Dimensions | 140x90x15mm |
SAW convolver is the element of nonlinear interaction.
Convolver carries out correlation processing of spread spectrum signals with large duration in real time.
Simplicity and reliability of SAW convolver give the opportunity to its usage in radars.
Two modifications of SAW filter are proposed
SPECIFICATIONS
|
Parameters |
АКн — 01 | АКн — 02 |
| Central frequency | 70 MHz | 150 MHz |
| Bandwidth of processed signals, at minus 3 dB | 10 MHz | 25 MHz |
| Carrier frequency of phase-shift keyed | 70 MHz | 150 MHz |
| Integration time (maximum length of the processed signal) | 20 ms |
| Weight | 100 g |
| Efficiency | 5 dBm |
| Dimensions | 120x27x10 mm |
The SAW filters are used in the radiotechnical eguipment, in TV communication systems, mobile phones, etc.
Specifications
| Frequency range | 10…1000 MHz |
| Minimal dimensions | 0.9…1,8 mm |
| Relative pass band | 0,1…40% |
| Losses within the pass band | 2…20 dB |
| Guaranteed attenuation | 30…50 dB |
| Operating temperature | minus 40 0C…+ 800C |
SAW FILTERS FOR MOBILE PHONES
| Nominal frequency | 210 MHz |
| Pass bandwidth minus 5 dB | 630 kHz |
| Ripple within ±300 kHz | 1 dB |
| Insertion Loss | 10 dB |
| Attenuation bandwidth at a level minus 40 dB | ±1,25 MHz |
| Guaranteed attenuation | 40 dB |
| Input impedance | 1000 Ohm |
| Output impedance | 500 Ohms |
| Operating temperature | minus 30 0C …+ 800C |
| Dimensions | 13,8×8,0x2,0 mm |
«BOXCAR» — The series narrow-band SAW filters, which have different central frequencies, with LC matching circuits of input and output is proposed .
Filters Input and output is strip line.
Produced three groups of filters
| group A | 30,30…89,50 MHz |
| group B | 227,45…396,30 MHz |
| group С | 11,00…134,80 MHz |
It is intended for providing of reliable and qualitative communications with possibility to organize the internal communication, increasing efficiency of use of the existing local phone lines, thereby decreasing expenses of it contents.
Automatic telephone exchange (ATE) satisfies to the international quality standards, providing uninterrupted communication at any load. It is simple in installation and is convenient in use.
The given advantages in a combination of easy usage and obtainable price do automatic telephone exchange by necessary attribute for business life of any firm.
MINI ATE
The main functions of the MINI ATE are: