Remtron
®
Engineered Systems
User Manual
45
9M02-9028-A021-EN
Version 4.0
Appendix I: Transmitter Specifications
Item
Detail
Operating frequency band
902
–928 MHz
Channel spacing
300 KHz
Modulation
Digital Frequency Modulation based on Manchester Code. Contains 16-
bit address plus 16-bit CRC check
Power, input
AA cell batteries (Alkaline recommended)
Output power
Meets FCC Part 15 requirements for license-free operation
Antenna
Circuit board, internal or front mounted (belly box)
Indicators
Self-test LED indicator
Ambient Operating Conditions
-20º F to +160º F (-28º C to +71º C)
Model
Weight
(1)
Dimensions
Commands
Batteries
21T10A
10.9 oz.
2.75" x 7.11" x 1.22"
10
2
21T14A
12.9 oz.
2.75" x 8.48" x 1.22"
14
2
21T18A
12.9 oz.
2.75" x 8.48" x 1.22"
18
2
21T20
1.25 lb.
3.5" x 11.5" x 1.0"
20
3
21T23
1.25 lb.
3.5" x 11.5" x 1.0"
23
3
21T34A
4.5 lbs.
5.0" x 9.0" x 5.5"
(2)
24 + 6
3
21T44A
4 lbs.
5.0" x 10.0" x 6.5"
(3)
24 + 8
3, 6 or 9
21T54A
4 lbs.
4.5" x 9.5" x 7.5"
(3)
24 + 8
3, 6 or 9
21T74A
4.5 lbs.
5.0" x 10.5" x 8.5"
(3)
24 + 8
3, 6 or 9
Notes:
(1)
Weight includes batteries.
(2)
21T34A can transmit 24 discrete plus 6 stepped lever commands.
(3)
21T44A, 21T54A and 21T74A can transmit 24 discrete plus 8 analog commands.
