The set of KU-BAND up-converters.
The set of Ku-band up-converters consists of two blocks:
- The tuner - indoor (50…90) MHz frequency up-converter to L band (950…1700) MHz;
- Outdoor frequency converter (OFC) from L to Ku band (13750…14500 MHz).
The indoor 70 MHz frequency synthesized up-converter to L band KRYuB. 434851.001 (tuner) is designed to convert 50…90-MHz input band signals into the 950…1,700-MHz output signals. The tuner is used as part of the transmitting equipment of a 13.75…14.5-GHz satellite communications station together with outdoor L-to-Ku band frequency converter (OFC).
The input band central frequency f0 = 70 MHz is converted at the tuner output into any of the F0 band frequencies 970 to 1,680 MHz. Values of the F0 frequency shall be settled with 0.125 MHz step and the tuner indicator shows the output frequency in the range 13750 to 14500 MHz. This frequency is equal to the output frequency of the outdoor converter KRYuB.434852.025 .
The tuner is equipped with a monitoring signal output that takes not significant part of the output signal.
Operating conditions:
- Operating ambient temperatures from: +5°С to +45°С
- Relative humidity: 95±4 % at + 35°С
- Decreased air pressure: 460 mm Hg (4,000 m above sea level)
MAIN TECHNICAL CHARACTERISTICS OF THE TUNER
| N | Parameter name, unit of measurement, permissible value | Value | Note |
| 1 | Input frequency band, MHz | 50…90 | |
| 2 | Input VSWR, no more | 1,2 | |
| 3 | Output frequency band, MHz | 950…1700 | |
| 4 | Output VSWR, no more | 1,3 | |
| 5 | Transmission gain, dB | 18…22 | |
| 6 | Transmission ratio adjustment range, dB, min. | 30 | Step ~0,5 dB |
| 7 | Main output power at 1 dB compression dBm, no less | 10 | |
| 8 | Power ratio at test signal output to main signal output, dB | Minus 33…27 | |
| 9 | Ripple of amplitude-frequency characteristic in Fo ± 20 MHz output signal band dB, no more | ±0,5 | 970 < F0 < 1,680 |
| 10 | Ripple of amplitude-frequency characteristic in full band of output frequencies, dB, no more | ±1,5 | |
| 11 | Transmission ratio instability, at constant temperature under applying input signal of constant level, dB/day, no more. | ±0,5 | When the temperature
and the input signal
are constant |
| 12 | Output signal ratio at "ON/OFF" regimes, dB, no less | 70 | |
| 13 | Group delay time ripple in Fo ± 20 MHz band of output signal, nc, no more | 4 | 970 < F0 < 1,680 |
| 14 | Noise figure, dB, no more | 20 | |
| 15 | Level of spurious products in output signal spectrum:signal related at output signal level +0 dBm, dBc, no more | Minus 60 | |
| 16 | Level of spurious products in output signal spectrum: without input signal, dBm, no more | Minus 55 | |
| 17 | Step size of carrier frequency tuning, kHz | 125 | |
| 18 | Carrier frequency instability, no more | (±2x10-8) | From internal 10-MHz generator |
| 19 | The level of spectral density of phase noise
Frequency offset from carrier: | | From internal 10-MHz generator |
| 0,1 kHz | Minus 66 | |
| 1,0 kHz | Minus 76 | |
| 10,0 kHz | Minus 86 | |
| 100,0 kHz | Minus 96 | |
|
TM
