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IF AMPLIFIER KRUB.468714.038
IF amplifier is intended for using in receivers of analog or digital radiorelay station with 70MHz IF. The functions of IF amplifier are the following:
- regulation of IF signal amplification in automatic gain control regime or in hand control regime;
- forming of the amplitude frequency response and the phase frequency response of receiving path;
- forming of the substitute 70 MHz signal in case of input signal decreasing lower then threshold level;
- forming of the supervisory signals: "IF level", "IF alarm", "Usource control";
- receiving and executing of the remote control signals: "AGC off", "Hand gain control", "Output power level setting".
There are 3 models of IF amplifier which differs of the frequency band:
- KRUB.468714.038 - 30 MHz bandpass;
- KRUB.468714.038-01 - 18 MHz bandpass;
- KRUB.468714.038-02 - 7 MHz bandpass.
Operating conditions of IF amplifiers are the following:
- ambient temperature: from minus 40 °С up to +55 °С;
- relative humidity: no more 95% at 35 °С;
- low pressure: up to 460 mm Hg.
SPECIFICATION
| Operating frequency range at minus 3dB level, MHz, no more | KRUB.
468714.038-00 | KRUB.
468714.038-01 | KRUB.
468714.038-02 |
| - | 30 | 18 | 7 |
| Maximal gain, dB, no less | 60 | 65 | 65 |
| Gain ripple in 70±12 MHz frequency range, dB, no more | 0,4 | not specified |
| Group delay time ripple in 70±12 MHz frequency range, nsec, no more | 4 | not specified |
Output power in AGC regime, mW
normal regime
forced regime |
1±0,25
3,5±0,5 |
| Maximal permissible level of input signal, mW, no more | 1 |
| Automatic gain control level, dB, no less | 55 |
| Noise figure, dB, no more | 5 |
Selectivity
at ±25 MHz, dB, no less
at ±14 MHz, dB, no less
at ±7MHz, dB, no less |
30 |
26 |
20 |
(2-d…4-th) harmonic suppression of output signal
at Pout=1mW, dB
at Pout=3.5mW, dB, no less |
30
20 |
| 3rd intermodulation distortion in full AGC range, dB, no more | 30 |
| input* VSWR, no more. | 1,35 |
| outputs** VSWR, no more. | 1,06 |
Input signal threshold level
of auxiliary generator switching on, dBm
of auxiliary generator switching , dBm |
-65
-60 |
-70
-65 | -75
-70 |
| Output frequency of auxiliary generator, MHz | 70±0,1 |
| Output power of auxiliary generator, mW | 0,3...1,4 |
“IF level” control voltage, V
Рin=-55 dBm
Рin=-30 dBm
Рin=-10 dBm |
10,5±0,5
6±1
2±1 |
Supply voltage, V
no less
no more |
14,5
18 |
| Consumption current, mA, no more | 120 |
| Dimensions, mm | 188х95х27 |
| Weight, g | 600 |
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TM
