Lectrosonics DSSM-A1B1 Quick Start Manual page 13

green and the –20 dB LED starts to flicker red during the loudest peaks
in the audio.
5) Once the audio gain has been set, the signal can be sent through the
sound system for overall level adjustments, monitor settings, etc.
6) If the audio output level of the receiver is too high or low, use only the
controls on the receiver to make adjustments. Unless the microphone
or its position changes, or a different instrument is being used, leave the
transmitter gain adjustment set according to these instructions. Use the
audio output level control on the receiver to make adjustments for the
desired level being delivered to the connected mixer, recorder, etc.
600MHz Guard Band and Duplex Gap
You'll notice that our B1C1 range for North America takes advantage of two sets
of spectrum space within the 600 MHz band, as designated by the FCC auction.
The 600 MHz band is made up of the following four parts:
Guard Band (614-617 MHz)

 Duplex Gap (652-663 MHz)
Wireless devices in North America are limited to the Guard Band (614-617 MHz)
and Duplex Gap (652-663 MHz).
The Guard Band consists of:
 614-616 MHz: 2 MHz (unlicensed operators)
 616-617 MHz: 1 MHz buffer (unavailable for use)
The Duplex Gap consists of:
 652-653 MHz: 1 MHz buffer (unavailable for use)
 653-657 MHz: 4 MHz (licensed operators only)
 657-663 MHz: 6 MHz (unlicensed and WSDs)
www.lectrosonics.com
 Downlink Band (617-652 MHz)
 Uplink Band (663-698 MHz)
Power is limited
to 20mW for
wireless micro-
phones used in
this part of the
spectrum.
13