Instruction Manual

FREQUENCY BLOCKS AND RANGES
The table below lists the factory designated frequency ranges
available for the UCR300 receiver. For convenience, the table
includes information about the UM300B belt-pack transmitter
antennas as well.
Each UCR300 receiver is built to cover a pre-selected range of
frequencies (a “block”) as shown below. The receiver will tune to
any of 256 different frequencies within this factory assigned block.
The UCR300 UHF Receiver antennas (model A8U) are color
coded to indicate the frequency block that they operate within.
The length of the antenna varies with the frequency block. The
actual length of the antenna is not as critical as it might appear in
the table below. The usable bandwidth of the A8U antennas are
+/- 50 MHz from the center frequency, so it is acceptable to use an
antenna from an adjacent block above or below the operating
frequency.
The color of the antenna sleeve is in keeping with standard resistor
value color codes for the second digit of the block number.
FREQUENCY ANT SLEEVE ANTENNA
BLOCK RANGE COLOR WHIP LENGTH
21 537.600 - 563.100 Brown 4.74"
22 563.200 - 588.700 Red 4.48"
23 588.800 - 614.300 Orange 4.24”
24 614.400 - 639.900 Yellow 4.01"
25 640.000 - 665.500 Green 3.81"
26 665.600 - 691.100 Blue 3.62"
27 691.200 - 716.700 Violet (Pink) 3.46"
28 716.800 - 742.300 Grey 3.31"
29 742.400 - 767.900 White 3.18"
30 768.000 - 793.500 Orange/Black 3.08"
31 793.600 - 819.100 Orange/Brown 2.99”
32 819.200 - 844.700 Orange/Red 2.92”
33 844.800 - 865.000 Orange/Orange 2.87”
Whip Length
A8U Receiver Antenna
Whip Length
A6U Transmitter Antenna
10