TRANSMITTER MIXER BLOCK is intended for application in the conversion equipment of a tropospheric radio station as the up-converter of 70 MHz IF in a microwave signal with phase suppression of LO signal and useless sideband. Additionally, TRANSMITTER MIXER BLOCK is performed the following:

- forming of amplitude-response characteristics at 70 MHz IF;
- admixing of 56 and 84 MHz pilot signals to 70 MHz IF information signal;
- selection of useful sideband;
- IF and pilot signals amplification in I and Q channels of mixer with phase suppression of useless sideband;
- preamplification of microwave output signal;
- forming the signals of null IF input power and null LO power.

Operational frequency range, MHz: input signals	70±6
Operational frequency range, MHz: output signals	4500…5000
Transfer ratio, dB	5±1
Gain ripple in 70 ±6 MHz, no more, dB	0,5
Selectivity at Fo±12 MHz offset, not less, dB	30
LO signal level at microwave output in operating output signal range at 70 MHz input signal power of (0±1) dBм, no more, dBс	- 20
Level of useless sideband in operating output frequency range at 70 MHz input signal power of (0±1) dBм, no more, dBс	- 20
Transfer ratio from input pilot signal generator up to microwave output, dB	0±1
VSWR of microwave output, no more	1,35
VSWR of inputs, no more	1,2
Dimensions, mm	148х137х36
Weight, kg	0,5