A low-power MITRIS system is intended for channel "shifting" from the main head-end to new locations for a distance of 8km. It is impossible to use digital tuners in the new locations because signal reception is conducted by analog tuners from a low-power MITRIS system. The price of this system can be compared to the price of digital tuners.

                          * The system is compatible with the existing cable networks and is intended for a directive transmission of
                            TV signals from the main head-end for a distance of 8-20km
                          * A broad frequency range provides transmission of great information streams over-the-air, including digital
                            streams from IKM-15, IKM-30 telephone multiplexers, etc.
                          * It occupies an intermediate position between television market and telephony market
                          * It is based on use of frequency modulation
                          * Compact design
                          * Delivery set for MITRIS-5: AVT-300F modulator - 5pc, UCA-5 up-converter - 1pc, dish 0.6m - 1pc,
                            power supply device 12V - 1pc, infeed - 1 pc

The up-converter appearance without protective cover
	A MITRIS receiving part comprises standard satellite equipment: a dish antenna and analog tuners (see the fig. at the left side) or a SAT receiver SR-100, manufactured by Beta TV com. The explanation of this part's operation is not necessary.

     A Supposed Procedure of Operation with MITRIS System Transmitting Part.
    Inject group signal from frequency modulator outputs to an up converter (see fig.1). Signal levels of each modulator at the up-converter input should be set according to the table given in the MITRIS datasheet. It should be done with the help of an output level adjuster on a faceplate of every modulator or with the help of an additional continuous attenuator which can reduce group signal. (A device LFM-320 or an analogous one can be used for measuring). While having the set output levels, signal power is the same for each channel at the up-converter output. The signal power amounts to 2 mW (level spread of signals arriving to the up-converter is caused by amplitude frequency response unevenness of a transmission path and the up-converter).
    Power equalization at the up-converter output is needed for a qualitative signal reception. The dynamic range of a receiving converter is not high because of its higher gain of ≈40...50dB. Its dynamic range amounts approximately to 10 dB and ranges (output) from 41dB/µV (for a channel) to 51dB/µV (for a channel). The information is given for a AP8-74C converter of the company MICROELECTRONICS TECHNOLOGY. (The lower level of dynamic range is defined by converter noise power led to the input - U_eff.n ≈8dB/µV and the necessary store of SNR which amounts to 33dB. Altogether 33+8=41dB/µV. The upper level is defined by the maximum possible output amplifier level of a receiving converter IMA3 of which is 100dB/µV according to DIN 45004. While having 10 channels the maximum output level for a channel is a bit higher than 93 dB/µV. While having a 40dB gain of the ÀÐ8-74Ñ converter the upper level amounts to 93-40=53dB/µV and dynamics amounts to 53-41 ≈10dB. Irregularity of the ÀÐ8-74Ñ receiving converter is slight, not more than 1dB. That is why it was not considered in the description above).
     Thus while using the ÀÐ8-74Ñ receiving converter the signals at its output should be within the limit of 41+40=81 dB/µV to 53+40=93 dB/µV for a channel (the control can be effected by connecting a LFM-320 device to the output of the receiving converter). In case of an 93dB/µV upper threshold excess the group signal power at a sending end should be lowered (with the help of a group signal continuous attenuator). If a signal level at a receiving-end is lower than a lower threshold give consideration to a more precise transmitting and receiving antenna orientation or change the secondary radiators to those with a greater diameter. Use the description given above while using receiving converters of other companies.

• TV transmitting equipment in the IF range of 1000-2000 MHz
• TV transmitting equipment in the MMDS frequency range of 2500-2700 MHz
• TV transmitting equipment in the MITRIS frequency range of 11700-12200 MHz
• MITRIS system (transmitting part)
• Tunable attenuator
  DP-2000
• FM-stereotransmitting equipment