Mission System Operator (MSO) Standardization Practice Test

For MILSATCOM operation, how many ARC-210 radios can transmit simultaneously on UHF MILSATCOM?

One Two Three All

Correct Answer:

One

Explanation:

The key idea is that the UHF MILSATCOM uplink is a shared, single-channel path. On MILSATCOM, the ground and airborne links use one transmitter path to reach the satellite, and multiple ARC-210 radios connected to that uplink cannot all transmit at the same time without causing interference and signal collisions. To keep the link clean, only one radio is allowed to transmit on the UHF MILSATCOM channel at any given moment, while the others can receive or operate on other bands. So, the best answer is that only one ARC-210 can transmit simultaneously on UHF MILSATCOM. The other options would create uplink conflicts that the system is designed to avoid.

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