Checking Transmitter Battery Power; Changing Transmitter Audio Level; System Frequency Compatibility - Shure SC User Manual

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CHECKING TRANSMITTER BATTERY POWER

With the transmitter on, press and hold the BATTERY CHECK switch and
observe the battery fuel gauge. Three green LEDs will light if the battery is
fresh. As the battery is used up, the green indicators turn off one by one.
When approximately two hours of battery life remain, a single yellow LED
will light. When approximately 45 minutes of battery life remain, a single red
LED will light, indicating the need to change the battery. If no indicators light,
the transmitter is not operational and the battery must be replaced.
Fuel Gauge
3 Green LEDs
2 Green LEDs
1 Green LED
1 Yellow LED
1 RED LED
No LEDs
NOTE: Actual operating time varies depending on the battery in use.

CHANGING TRANSMITTER AUDIO LEVEL

The audio gain control on all SC transmitters is factory pre–set to provide
a satisfactory output level for most applications. However, for high sound
pressure level applications such as loud singing or loud musical
instruments, the preset gain level may be too high, as indicated by the
constant illumination of the red AUDIO light on the SC4. For low sound
pressure level applications, such as soft-spoken presenters, the gain may
need to be increased, as indicated by the failure of the yellow AUDIO light
on the SC4 to light at all.
To increase gain, rotate the audio gain control counterclockwise, using
the supplied screwdriver, until the yellow AUDIO light on the SC4 flickers
occasionally when the vocalist is singing or an instrument is being played.
To decrease gain, rotate the audio gain control clockwise, using the
supplied screwdriver, until the yellow AUDIO light on the SC4 flickers
occasionally when the vocalist is singing or an instrument is being played.

SYSTEM FREQUENCY COMPATIBILITY

SC wireless systems are available in two basic frequency ranges: the
Broadcast frequency range (174–216 MHz) and the Traveling frequency
range (169–172 MHz).
In each Broadcast frequency group, eight frequencies are available at
200 kHz intervals. Each system is shipped with the frequency selector
switches in the base frequency (#4) position. To ensure RF compatibility,
all SC systems must share the same frequency selector switch settings.
Battery
*Estimated operating time with a fresh 9V battery
– 8 –
SC1 and SC2 Operating Time
Available (estimated)*
6 – 8 hours
4 – 6 hours
2 – 4 hours
45 minutes – 2 hours
0 – 45 minutes
none
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