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Gemini Space Program Voice Communications
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Voice communications [for the Gemini program] were performed at 296.9 MHz with an output power of 3 W. A backup transmitter-receiver at 15.016 MHz with an output power of 5 W was also available. Two antenna systems consisting of quarter-wave monopoles were used.
Telemetry was transmitted via three systems, one for real time telemetry, one for recorder playback, and a spare. Each system was frequency-modulated with a minimum power of 2 W. Spacecraft tracking consisted of two C-band radar transponders and an acquisition-aid beacon. One transponder is mounted in the adaptor with a peak power output of 600 W to a slot antenna on the bottom of the adaptor. The other is in the reentry section, delivering 1000 W to three helical antennas mounted at 120 degree intervals just forward of the hatches. The acquisition-aid beacon was mounted on the adaptor and had a power of 250 mW.
Source: NASA
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Frequencies |
| Frequency | Bandwidth | Use | Service | Table |
| 15016 kHz | 3 kHz | Backup Gemini voice communications | - | - |
| 296.9 MHz | 15 kHz | Primary Gemini voice communications | - | - |
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