SP2-433-160 Datasheet, PDF (14/27 Pages) Radiometrix Ltd – UHF SpacePort Transceiver

PREAMBLE
address
default
formula
valid range
Number of "01" preamble cycles on TX packets
One '01' cycle takes 12.5µs @ 160kbit/s
01
8C
Preamble time = PREAMBLE * 0.0125ms
01 to FF
WAKE-UP
address
default
formula
valid range
Number of units of 'WAKE-UP PREAMBLE + PLEASE HOLD LINE'
To be sent as extended preamble to wake-up a remote SP2 in power
save mode. WAKE-UP should be set to approx. 1.5 times the remote
units OFF Time
02
53
Wake-up message = WAKE-UP * 3.24ms
01 to FF
SLEEP-TIME
address
default
formula
valid range
Power Save 'Off' Time (RC controlled)
The OFF time is controlled by an RC oscillator in the SP2 which has a
wide tolerance of +/- 30%
03
03
Off-time = 22 * 2^SLEEP-TIME ms
00 to 03
RX ↔ TX
address
default
formula
valid range
TX ↔ RX change over delay in units of 100µs
04
2C
Delay = RX ↔ TX * 12.5µs
01 to FF
PWR → RX
address:
default:
formula:
valid range:
RX stabilisation delay in units of 100µs
05
8
Delay = PWR → RX * 0.1 ms
01 to FF
TX-BACK-OFF
address
default
formula
valid range
Maximum TX Back-off delay in units of 1ms
Used when LBT=1 & DBT=1
06
03
maximum delay = (2 ^TX-BACK-OFF - 1) ms
00 to 07
00 = 0 - 1 ms
04= 0 - 31 ms
01 = 0 - 3 ms
05 = 0 - 63 ms
02 = 0 - 7 ms
06 = 0 - 160 ms
03 = 0 - 15 ms
07 = 0 - 255 ms
Radiometrix Ltd, SP2 data sheet
page 14