Select a Block Number for
Frequency Select Switch Settings:
Block 470 470.100 to 495.600 MHz
Block 19 486.400 to 511.900 MHz
Block 20 512.000 to 537.500 MHz
Block 21 537.600 to 563.100 MHz
Block 22 563.200 to 588.700 MHz
Block 23 588.800 to 614.300 MHz
Block 606 606.000 to 631.500 MHz
Block 24 614.400 to 639.900 MHz
Block 25 640.000 to 665.500 MHz
Block 26 665.600 to 691.100 MHz
Block 27 691.200 to 716.700 MHz
Block 28 716.800 to 742.300 MHz
Block 29 742.400 to 767.900 MHz
Block 30 768.000 to 793.500 MHz
Block 31 793.600 to 819.100 MHz
Block 32 819.200 to 844.700 MHz
Block 33 844.800 to 862.000 MHz
Block 944 944.100 to 951.900 MHz
CLICK HERE for a pre-coordinated frequency chart in PDF format.
TV Channels, Frequencies and Blocks:
CLICK HERE for US
CLICK HERE for Europe
Important!
Transmitter and receiver must be on the same frequency block and the transmitter and receiver must be set to the same frequency. If they are not, the system will not work.
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SM Frequency Adjustment
 The SM Series offers state-of-the-art membrane switches and
LCD to set up and control the transmitter. The operating
frequency can be displayed in MHz or as a two-digit
hexadecimal number. The hexadecimal number is equivalent
to the rotary switch settings used on other Lectrosonics
transmitters. With the SM, pressing the Up or Down Arrows
increases or decreases the operating frequency in 100 kHz increments. The
frequency range (block) of the unit is displayed as part of the power on process.
Adjusting the Frequency for Transmitters
with Rotary Frequency Select Switches
If you are experiencing interference from another signal on your frequency, you may want to change the operating frequency of your system. 
To gain access to the frequency adjustment switches, slide the access door (if equipped) open with a fingernail. The frequency range (block) of the unit is laser engraved on this switch cover or housing.
The left switch changes the operating frequency in large steps and the right switch changes it in fine steps. If you are experiencing interference, change the operating frequency in fine steps to find a clear channel. If it is not possible to find a clear channel using the fine switch, return it to its original position and change the left switch by one click then try the right switch again.
Note: Block 944 wireless microphones operate within the STL band and are only allowed for use in Part 74 of the FCC rules by licensed users for broadcast production. All other users of wireless microphones must operate in the range between 470-698 MHz.
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