HEADQUARTERS OH-58A - Page 142

TM 55-1520-228-10
CONTROL/INDICATOR FUNCTION
1. NAV VOL Power Switch and
Volume Control
NAV VOL...................................................... Turns set on and controls VOR/LOC receiver volume.
OFF .............................................................. Turns set OFF.
2. MB VOL Power Switch and
Volume Control
MB VOL........................................................ Turns set on and controls marker beacon volume.
OFF .............................................................. Turns set OFF.
3. MB SENS Switch
HI.................................................................. Selects high receiver sensitivity.
LO................................................................. Selects low receiver sensitivity.
4. Frequency Selectors
Right............................................................. Selects the fractional megahertz portion of the desired
frequency.
Left ............................................................... Selects the whole megahertz portion of the desired
frequency.
5. VOR/MB-TEST Switch ......................................... Provides on and off capability for the VOR/MB self-test
circuit within the receiver.
206075265
Figure 3-11. CONUS Navigation Receiver Control Panel
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