Antenna/Block Reference Table - Lectrosonics DCR822 Instruction Manual

Antenna/Block Reference Table

The two AMJ whip antennas supplied with the receiver are factory cut to specific frequency blocks as shown in the
table below. A colored cap and label are used on blocks 20 through 26, and a black cap and label are used on the
other blocks to denote the frequency range of each model.
The chart is useful for fabricating an antenna from coaxial cable or other materials, or for identifying the frequency of
an antenna that is not marked. The lengths shown are specifically for the AMJ whip antenna with a SMA connector, as
determined by measurements with a network analyzer. The optimal length of the element in other designs will likely be
different than those shown in this table, but since the bandwidth is typically wider than the specified block, the exact
length is not critical for useful performance in whip, dipole and coaxial designs.
The hinged joint pivots in both directions
BLOCK
A1
B1
C1
Note: Not all Lectrosonics products are built on all of the blocks covered in this
chart.
Lay uncut antenna on this template and cut to length for the desired frequency block
Trim the end of the color cap and slide the remaining sleeve over the whip - OR - Glue color cap onto the end
Rio Rancho, NM
FREQUENCY
RANGE
470 470.100 - 495.600
19 486.400 - 511.900
20 512.000 - 537.500
21 537.600 - 563.100
22 563.200 - 588.700
23 588.800 - 614.300
24 614.400 - 639.900
25 640.000 - 665.500
26 665.600 - 691.100
941 941.525 - 959.825
961 961.100 - 1014.900
CUTTING TEMPLATE
Whip Length
*Cut end of cap off
and slide over whip
Note: Check the scale of your printout. This line should be 6.00 inches long (152.4 mm).
Dual Channel Digital Receiver
CAP
COLOR
Black w/ Label 5.47"
Black w/ Label 5.19"
Black w/ Label 4.95"
Brown 4.73"
Red 4.47"
Orange 4.23"
Yellow w/Label 4.07"
Green w/Label 3.87"
Blue w/Label 3.68"
Black w/Label 2.53"
Use antenna for 941
Frequency Blocks
ANTENNA
WHIP LENGTH
141.2 mm
133.9 mm
126.2 mm
119.6 mm
113.8 mm
108.5 mm
103.4 mm
98.3 mm
93.5 mm
64.3 mm
*Color cap
21