Low noise down - converters of radiorelay station (LNDC)
Low noise down conwertion module is designed to transform the microwave signal to the 70 MHz frequency in the input cannel of radiorelay station. Low noise down conwertion module is produced in two variants:
"H" - of FLO < of FRF;
"B" - of FLO < of FRF.
CHARACTERISTICS
| Parameters, units of measurements | Modification |
| LNDC-8 | LNDC-13 | LNDC-15 |
Input signal frequency, MHz
for variant "H"
for variant "B" |
7600...8000
8000...8400 |
12750...13000
13000...13250 |
14400...14850
14900...15350 |
LO frequency, MHz
for variant "H"
for variant "B" |
5730...7930
8070...8470 |
12680...12930
13070...13320 |
14330...1478
14900...15420 |
| Transmission ratio, dB | 88±3 |
| Ripple of transmission ratio, nanosecond no more | 0,4 |
| Ripple of group delay time, nanosecond no more | 4 |
| Noise factor dB, no more | 2,5 |
| Selectivity at ±25 MHz off set, dB no less | 25 |
| Selectivity on the mirror channel, dB no less | 20 |
| Output signal power, dBm | 5±1 |
| AGC dynamic range, dB no less | 55 |
| VSWR input/output, no more | 1,3/1,1 |
| Consumption power (+12 V), mA no more | 250 | 300 | 250 |
| Weight, g | 250 |
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TM