Troubleshooting
8 Apollo SL40 Field Maintenance Manual
Full transceiver functions are operational during this function, including transmit.
Note: The sidetone level is an 8-bit value with a range of 0 to 255.
BASE STATION LOCKOUT MODE DISPLAY AND ADJUSTMENT
This function is used to display and adjust the lockout mode. Improperly set, the lockout can
disable various Comm functions giving the appearance of a malfunctioning unit. Turning the
small knob changes the mode. The modes are summarized as follows.
Locks 000
• Mode 0: Normal pilot mode. No disabled functions
• Mode 1 & 3: Toggle Lock. Only the Flip-Flop button is disabled.
Fixed Primary frequency.
Variable Standby frequency.
Frequencies cannot be swapped.
• Mode 2 & 6: Primary Frequency Protected.
Fixed Primary frequency.
Variable Standby frequency.
Frequencies can be swapped.
Primary is not modifiable when it is the standby freq.
(displayed as Mode 6)
• Mode 4: Fixed Two Channel radio.
Both frequencies are fixed.
Frequencies CAN be swapped.
• Mode 5 & 7: Toggle Lock w/ fixed standby frequency.
Both frequencies are fixed.
Frequencies CANNOT be swapped.
Note that it is possible to put the unit into mode 8, but on re-entry to the system functions, it
will be show as mode 0.
Full transceiver functions are operational during this function, including transmit.
Note: The lockout mode has a range of 000 to 008.
While viewing the frequency display, use the large and small knobs on the right side of
the SL40 to select an unused local channel. Toggle this frequency to the active channel.
Press and hold the MON button for about 3 seconds to reach the System Function. Use
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