Real-time and delayed-time transmission will normally be initiated from the ground station by way of DCS channels. The parachute Jettisoned (AE13) signal is initiated when the pilot depresses the CHUTE JETT change energizing redundant main parachute jettison relays. The acquisition support beacon will operate until it's jettisoned with the adapter equipment section. One of the uhf antennas is situated on the adapter gear section and serves the DCS receiver number 1, slots online and the acquisition assist beacon or delayed-time telemetry transmitter.
The actual-time telemetry transmitter might be operating in the course of the pre-launch phase of the mission. Because the spacecraft goes out of range the delayed-time telemetry transmitter is turned off and the acquisition support beacon resumes transmission. The stand-by transmitter is switched to delayed-time transmission by a ground command by way of a DCS channel (if the STBY Control change is in the OFF position), or by inserting the STBY TM switch to the D/T place.
The stand-by transmitter is switched to real-time transmission by a floor command via a DCS channel (if the STBY TM Control switch is in the OFF position), or by placing the STBY TM Control swap to the R/T place. During orbit, operation of the telemetry transmitters and beacons will usually be managed by floor free slots commands via DCS channels.
Lightweight headsets are equipped for use when the spacesuit helmets are removed during orbit, or throughout postlanding if the helmets or total spacesuit is eliminated previous to recovery.
The flashing restoration gentle, used throughout the postlanding section of the mission, incorporates its own power provide and improves visual spacecraft location. The information signal is in phase with the reference for slots online a logical 1 and 180 degrees out of section with the reference for a logical 0; thus establishing the required necessities for digital information. This locations coaxial swap three to place 1; thus connecting the quadriplexer to the IN position of the coaxial change 5.
Coaxial switch 5 was placed in position 1 when the ANT CNTL change was positioned in the ANTY position during the C-band beacon operation. The specified antenna utilization is obtained by inserting the ANT CNTL circuit breaker to the ON position. Input voltage is applied from the spacecraft major bus via the BEACON-C circuit breaker, C-RNTY BEACON Control switch and the RNTY place of the ANT 8EL switch. The 4 beacons are: An acquisition assist beacon and a restoration beacon used to find the spacecraft, and two C-band free slots online beacons used to trace the spacecraft.
Equipment utilization after spacecraft/launch car separation is equivalent to that described below Pre-Launch apart from the next: Upon closure of any two of the three spacecraft separation sensors the acquisition help beacon is energized. The C-band antenna system, used with the re-entry C-band beacon, is energized when the ANT SEL change is placed in the RNTY place. At R & R separation, energized parachute deploy time delay relays energize coaxial switch 3, inserting it to position 2.
This makes the uhf descent antenna available for Casino slots actual-time telemetry transmission and uhf voice communications. In case of failure of the actual-time telemetry transmitter, the standby transmitter could also be used for free slots online actual-time transmission. Between launch and orbital insertion, knowledge acquisition is via the true-time telemetry transmitter. The forked latch is hooked up to a miniature pull-solenoid which is spring loaded within the prolonged place to make sure that launch shock and vibration hundreds won't cause inadvertent antenna extension.