Lectrosonics UH400a - Manual (Page 9)

Frequency Agile Plug-On UHF Transmitter
Block Numbers and Freqeuncy Ranges
The transmitter will tune to any of 256 different frequen- Block Numbers and Frequency Ranges (MHz):
cies within a factory assigned block.
0 1
2
3
4
5
6
7 8 9
A
B
C
D
E
F 0 1
2
3
4
5
6
7 8 9
A
B
C
D
E
F
Block 470 470.100 - 495.600
Block 19 486.400 - 511.900
Block 20 512.000 - 537.500
Block 21 537.600 - 563.100
Block 22 563.200 - 588.700
Block 23 (lower) 588.8 00- 607.900
Block 23 (upper) 614.100 - 614.300
Block 24 614.400 - 639.900
Block 25 640.000 - 665.500
Block 26 665.600 - 691.100
Block 27 691.200 - 716.700
Block 28 716.800 - 742.300
Block 29 742.400 - 767.900
Part of block 23 (TV channel 37) is not available since it
Two 16- position switches adjust the operating
covers a 608 to 614 MHz band that is allocated for radio
frequency in 100 kHz steps yielding the 256 in a
astronomy.
block (16 x 16 = 256).
To determine a frequency from a block number:
25.6 × Block Number = Lowest freq. (MHz) in the block
Example: 25.6 x 24 = 614.400
To determine a block number from a frequency:
Freq. (MHz) divided by 25.6 = Block number
(first two digits are the block number)
Example: 685.500 divided by 25.6 = 26.77734375
The first two digits left of the decimal are the block num­
ber. In this case, 685.500 MHz falls within block 26.
It is handy to remember these formulas, in case you do
not have a copy of the table.
Rio Rancho, NM 9