This is what the NJR2784H looks like:
...

Spec:
Local Oscillator: 10.0 GHz, Frequency range Rx 10.95 - 11.7 GHz, Output 950 - 1700 MHz, F-Connector 75 Ohm, Local Oscillator Stability: +/-900 kHz, Input Waveguide Flange WR75

Best regards, Eric