USX2-433-5(2008) Ver la hoja de datos (PDF) - Radiometrix Ltd
Número de pieza
componentes Descripción
Fabricante
USX2-433-5 Datasheet PDF : 7 Pages
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Pin Description
Pins Normal mode
Figure 3: Provisional USX2 footprint
Serial mode
1A
RF Gnd RF ground
2A
RF in/out To the antenna
3A
RF Gnd RF ground
Modem
mode
1
TXD
DC coupled input for TTL/ CMOS logic
NC
2
TXE
Transmit enable.
NC
Low = RX mode. High = TX. (10kΩ pull down)
3
GND
(0V)
4
Vcc
DC supply input (3.6 –15V)
5
P3
Parallel channel select MSB
Serial read back BUSY
6
P2
Parallel channel select
TBA
MOD TXD
7
P1
P1 - Parallel channel select
TBA
MOD RXD
8
P0
P0 - Parallel channel select LSB
PGM in
PGM in
9
RSSI
DC level between 0.5V and 2.5V. 60dB dynamic
range
10
RXD
Open collector output of data slicer
NC
11
AF out
500mV p-p audio. DC coupled, approx 0.8V bias
NC
NOTES:
1. No inversion occurs between TXD and RXD. However AF out is inverted relative to TXD.
2. Parallel channel selects (P0-P3) and TXE are active LOW and have 47kΩ internal pullups to 3V
3. Open collector output RXD has a 47 kΩ pullup to 3V.
4. The software incorporates a 1200 baud modem, compatible with that implemented in other
Radiometrix narrowband units ( i1200 tones and format ). Modem operation is selected by serial
command.
5. Main serial port (P0, P3) operates at 9600 baud. (Command set is not the same as TR2M, SMX
families). The unit is capable of operating in 'basic' parallel channel select only mode, or in serial
controlled 'expanded' mode
6. Transmit power can be set by serial command
7. RSSI can be read back as a digital value. (on P3)
8. If analogue transmit modulation is needed, then connect a series 1µF cap + 500kΩ trimmer (a
multiturn is advised) in the TXD circuit. Adjust trimmer for 90% of peak deviation (+/- 2.7KHz) at
mean input level.
Radiometrix Ltd
USX2 Data Sheet (preliminary)
page 3
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