Sc4 Receiver Features And Controls (Figure 1) - Shure SC User Manual

ENGLISH

SC4 RECEIVER FEATURES AND CONTROLS (FIGURE 1)

1. Control Panel Door: Helps prevent tampering. Open by pushing down
on the door and pivoting it outward. A label on the inside of the door
lists the available system operating frequencies.
2. Frequency Selector Switch: Provides system frequency agility by
allowing user to select from eight different operating frequencies at 200
kHz intervals. It is factory pre–set to position #4 and is identical to the
frequency selector switch on the transmitters.
3. Tone Key Squelch Switch: Turns the tone key squelch on and off.
During installation, set tone key squelch in the OFF (right) position in
order to identify and adjust for potential interference problems. During
normal operation, set this switch in the ON (left) position.
4. Squelch Control: Automatically quiets or "mutes" the receiver when
the transmitter signal becomes weak or fails. This control is
factory–preset for optimal operation in most installations. However, it
can be adjusted to compensate for unusual conditions.
5. Volume control: Determines signal level at both receiver output
connectors and lets the user adjust the receiver output level to match
the input level requirements of a mixer or amplifier.
6. Screwdriver: Used to adjust the frequency, squelch, and volume
controls. Also used to adjust transmitter frequency and audio gain.
Snaps into place behind the control panel door for storage.
7. Diversity Signal LEDs: Illuminate to show RF signals received by
antenna A, antenna B, or both. Normal operation is indicated by the
steady illumination of either or both LEDs. Note that these LEDs
indicate diversity mix, not signal strength.
8. RF Level Indicators: "Floating point" LEDs illuminate one at a time
to show strength of received RF signal. A stronger signal will illuminate
a higher numbered LED. The green LEDs indicate a signal of usable
strength. The yellow LED indicates a signal of marginal strength. The
red LED indicates an unusable signal.
9. Audio Level Indicators: A series of five LEDs illuminates to indicate
audio level. Normal operation causes steady illumination of the green
LEDs, with occasional flickering yellow LEDs. A red LED indicates
approaching audio overload condition and should occur rarely (only
during the loudest signals). Frequent and/or constant illumination of the
red LED indicates excessive audio level and the need to lower the
transmitter audio gain level.
10. Power ON LED: Green LED illuminates to indicate the receiver is on.
11. Power ON/OFF rocker switch: Applies power from the external ac
adapter to the receiver.
12. Antenna Connectors: UHF-type connectors provide connection to
1/4-wave antennas supplied with the SC4, or to the coaxial cable in the
optional WA420 Antenna cable kit for remote location of antennas, or
to optional WA380 1/2-wave high-gain antennas.
13. Output Connectors: XLR connector provides balanced low-impedance
(150 ) microphone or line level output; 1/4-inch phone jack provides
– 4 –
ENGLISH