Broadcast Electronics Marti GRX, User And Maintenance Manual, Page: 15 / 45

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Receiver Review
Like the Transmitter, the Receiver front panel accommodates the single control knob, the display,
four LEDs for immediate status control and a single output connector for IF monitoring.
Here too regular operation is signalized by green LEDs: "PLL Lock" and "Field". This latter is a bi-
stable and lights in yellow when RF field is too low or absent. As in the Transmitter red LEDs signals
improper operation. The first one, "Modulation", is activated by low or absent modulation; the last
one is the general "Alarm" LED.
Figure 3 – GRX Block Diagram