4
Wireless Microphone System Operating Manual
A double receiver rack mount kit is available as an optional extra if required (Fig. 4).
Positioning the Receiver
For best operation, the receiver should be at least 1m above the ground and at least 1m
away from a wall or metal surface to minimize RF reflections.
4. THE BELT-PACK TRANSMITTER (SM716)
Channel Selection and Gain
The channel selector and gain adjustment are located under the battery cover as
shown in the picture below. To make channel selection remove the cover and select a
channel by turning the Channel Selector(6) with a small screwdriver. Gain adjustment
for Lavalier and Headset microphones can be done by adjusting the MT trimpot(5),
whereas GT trimpot(4) is for the gain adjustment of an Electric Guitar or other high
impedance line level inputs. If you’re using the Transmitter with an Aeromic then turn
down the MT trimpot to minimum. If
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MT trimpot at full and turn down only if
distortion is evident.
Due to minor variations in the casing sizes
of many brands of 9V batteries, the trans-
mitter battery compartment is designed
to accommodate the preferred 9V size
battery made by Eveready - the Energizer
9V Alkaline – but other brands may also
work well. Re-chargeable Ni MH batteries
@ 170-190mAH ratings may need to be
re-charged after about 1.5 – 2.0 hours of
continuous use, whereas Alkaline 9V Bat-
teries will generally be suitable for about
6 – 8 hours of airtime with the Aeromic or
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1. Battery Status Indicator
2. Power Switch
3. Microphone Connector
4. GT Trimpot
5. MT Trimpot
6. Channel Selector