UHF TV Band (792-806 MHz)
Freq. Code
Freq. (MHz)
• For use only where there is no TV Channel 67:
67R
792.650
67V
793.000
• For use only where there is no TV Channel 68:
68F
795.600
68K
796.650
68L
797.000
• For use only where there is no TV Channel 69:
69F
801.700
69K
802.700
69Q
804.100
69R
804.850
69S
805.200
Aside from the TV channel restrictions above, multi-channel systems may combine up to all 20
frequencies. Due to the unique conditions encountered in any complex system, the following
guidelines may be helpful:
• Use the Low-power transmitter setting to reduce the possibility of interference.
• Maintain the maximum possible spacing between transmitters and receivers, and
between transmitters.
• PRO 400 Series operating frequencies have been selected for optimum compatibility.
However,
all
sources of 800-900 MHz RF energy (other manufacturers’ wireless systems,
900 MHz cordless phones, etc.) can affect the overall performance of the multi-mic system in
ways which cannot be predicted. Only on-site trials with
all
RF equipment in operation can
determine the overall system functionality.
9
System Operating Frequencies
900 MHz Band (944 -952 MHz)
Freq. Code
Freq. (MHz)
44C
944.100
44Q
944.700
45A
945.000
46E
946.200
47C
947.100
48N
948.600
49S
949.800
50L
950.500
51M
951.550
51U
951.900
Wireless Operating Frequencies
Frequency Selection
Each transmitter/receiver system operates on a single factory-aligned, crystal-controlled
frequency. Available frequencies are shown in the chart on the following page. Frequencies in the
792-806 MHz band are useable in the U.S. and Canada; 944-952 MHz frequencies are approved
for use only in the U.S.
Because the 792-806 MHz frequencies are shared with TV broadcasting, frequency selection
is partially dependent upon which TV broadcast channels are in operation
where the wireless
system is to be used.
Operating frequency is specified by a three-character code, such as “67V,” in addition to the
actual frequency in MHz. The frequency of each transmitter appears on a label on the outside of
the unit. The frequency of each receiver appears on a label on the back of the unit and the frequen-
cy of each system appears on the outer carton. For future reference, please record them in the
space provided below.
RF Interference
If you encounter receiving interference (from other than an operating TV station), often it can be
eliminated by adjusting the receiver’s squelch control, as described on page 6.
Please note that wireless frequencies are shared with other radio services. According to
applicable regulations,“Wireless microphone operations are unprotected from interference from
other licensed operations within the band. If any interference is received by any Government or
non-Government operation, the wireless microphone must cease operation...”
If you need assistance with operation or frequency selection, please contact your dealer or the
A-T professional division.
Extensive wireless information also is available on the A-T Web site at www.audio-technica.com.
For future reference, please record your system information here (the serial numbers appear
inside the battery compartment of each transmitter, and on the bottom of each receiver):
Operating Frequency
Freq. Code
Frequency
•
MHz
Receiver
Model
Serial Number
Transmitter
Model Serial
Number
8
