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Apollo 8 User Manual

Apollo 8
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Apollo 8 Hardware Manual Front Panel 20
Monitor Output Gain Bypass
By default, monitor output levels are continuously variable. However, the monitor
outputs can be set to completely bypass the monitor level circuitry and operate at a
fixed reference level. This feature is set with the MONITOR OUTPUT GAIN menu in the
Hardware panel within the Console Settings window.
Tip: This feature routes the signal directly from the D/A converters to the monitor
outputs for the purest signal path when level control is not needed (for example,
when connecting the monitor outputs to an external monitor controller).
When the MONITOR OUTPUT GAIN menu is set to BYPASS in Console Settings:
The Monitor Level Indicator ring (#23) is solid green
When the Monitor knob (#22) is rotated, the ring flashes to indicate that no level
adjustment is occurring
ALT monitoring and assignable FCN switch features are unavailable
Signals at the Monitor Outputs (#34) are output at line level (without attenuation)
Monitor Mute
Pressing the Monitor knob toggles the mute state of the signals at the Left & Right
Monitor Outputs on the rear panel. If ALT monitoring is configured in the Hardware panel
within the Console Settings window (when ALT COUNT is a non-zero value), the ALT
monitor outputs are also muted by this control.
When the monitor outs are muted, the Monitor Level Indicator ring (#23) is red.
Note: Monitor Mute does not mute the headphone outputs.

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Apollo 8 Specifications

General IconGeneral
Mission TypeManned Lunar Orbit
Launch DateDecember 21, 1968
Launch VehicleSaturn V
Crew Size3
Crew MembersFrank Borman, James Lovell, William Anders
Duration6 days, 3 hours, 0 minutes, 42 seconds
Orbits Around Moon10
Landing DateDecember 27, 1968
Perigee111.1 km (69.0 mi)

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