Ratio Diversity Receiver
OPERATING INSTRUCTIONS
1) Connect the power supply.
2) Attach and place the antennas.
3) Connect the audio cable.
4) Set the front panel AUDIO LEVEL control fully counter-clockwise and set the POWER switch to ON. Check to
see that the red POWER LED lights up.
5) Adjust the transmitter “gain”. THIS IS PERHAPS THE MOST IMPORTANT STEP IN THE SET UP PROCEDURE.
See your transmitter manual (Operating Instructions section) for specific directions on the proper gain adjustment
of your particular transmitter.
6) After adjusting the transmitter gain, set the AUDIO LEVEL to a comfortable listening position.
7) Operate the system and adjust the receiver output level as required for your equipment. The input levels on
different VCR’s and PA equipment vary, which may require that you set the OUTPUT ATTENUATOR control in an
intermediate position. Try different settings and listen to the results. If the output of the receiver is too high, you
may hear distortion or a loss of the natural dynamics of the audio signal. If the output is too low, you may hear
steady noise (hiss) along with the audio.
INDICATOR QUICK REFERENCE
CODE LED - Lights when the transmitter is turned on and the internal code in the transmitter matches this particular
receiver. If the receiver is turned on after the transmitter, the code led will not come on. In this case, it will be neces-
sary to turn the transmitter off and back on to enable the receiver. When the carrier signal from the transmitter is too
weak to produce a clean audio signal the receiver will squelch (no audio) but the code lamp will remain lit.
POWER - This red LED lights up when the receiver is properly connected to a power supply and switched on.
MODULATION -- The audio level is indicated by these two LEDs, -20 and 0dB. The normal operating level occurs
when the -20 (green) LED is lighting up with the audio. The 0dB LED (red) lights up when the audio level is high and
the signal is being compressed in the transmitter. An extremely high audio level may cause distortion. If neither LED
lights up when audio is being produced through the system, the audio level is too low, which may produce audible
background noise (hiss) in the audio. The audio level is adjusted with the transmitter GAIN or MIC LEVEL control.
OPTI-BLEND LEDs -- These green LEDs indicate the blending action of the panning circuit in response to the
comparison of signal to noise ratios in the two receivers. The audio from either receiver is being mixed into the blend
when the corresponding LED lights up. The brightness of these LEDs varies in proportion to the amount of audio
being utilized from the associated receiver.
Rio Rancho, NM – USA
5
(12 pages)
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