Vega R-662A PRO PLUS, Руководство пользователя, Страница: 4 / 17

Controls and Indicators
Front Panel:
Audio-Level Meter: The Audio-level LED bargraph reads relative audio output
level. The reading shows the amount of modulation being received and is not
affected by adjusting the audio-output-level controls on the receiver. Ordinarily,
the scale's zero point indicates there is about 14 dB of headroom left in the system.
RF-Signal-Level Bargraph: A ten-position LED bargraph shows the relative
strength of the RF signal being received.
RF Meter Switch: A three-position rotary switch is provided to select whether the
RF-level bargraph indicates the RF level received by the channel A antenna, the
channel B antenna, or the channel that is presently being selected by the diversity
circuits. Ordinarily, the switch is left in the center, or DIV, position. However, during
setup or when trying to determine the effectiveness of each antenna, sometimes it is
helpful to force the RF-level bargraph to indicate the RF signal level at one or the
other antenna. This switch only changes the source being monitored by the RF-
level bargraph—it does not determine which audio channel is being selected by
the diversity circuits.
Diversity Selection Switch and Nondiversity Indicator: A three-position rotary
switch allows the operator to override the diversity selection circuits. In the
“NORM” position, the receiver's internal diversity circuits determine which
receiver will provide audio to the output connector. This is the way the R-662A
PRO PLUS receiver should normally be operated.
If the operator wishes to force the receiver to select either channel A or B, he/she
may do so by rotating the “DIVERSITY SELECT” switch to the appropriate
position. This feature allows the operator to verify that both receiver channels are
fully operational during sound check, and to “lock out” a channel that may be
defective for whatever reason.
An LED warning indicator near the diversity selection switch illuminates when
the operator has set the switch to a nondiversity position.
Power Switch and LED Power Indicator: Toggle on/off switch for ac, battery, or
external dc power. An LED indicates that ac or dc power is “on”.
Audio-Level Control: Screwdriver adjustment (30 dB range) for fine adjustment
of receiver audio output level. In addition, a rear-panel-mounted “MIC/LINE”
switch provides a 30-dB step attenuation to the output audio level.
Monitor Jack and Control: Level control for the monitor amplifier in the receiver;
independent of the main program audio output of the unit. The jack accepts a 1/4-
inch (6.35-mm) stereo or mono phone plug. This jack may be used as an auxiliary
line-level program output; however, the S/N will be slightly lower than for the
main program output.
Selected Diversity Channel Indicators (“DIV”): These LEDs indicate which
receiver channel is currently selected by the diversity circuits or by the diversity
selection switch.
Squelch Indicator (“SQ”): These green LEDs light up when the squelch circuit for the
corresponding channel is opened; that is, an above-threshold signal is being received by
that channel.
4 Model R-662A PRO PLUS Dynex III