FPX3-869-20 RADIOMETRIX, FPX3-869-20 Datasheet - Page 3

• Manufacturer Part Number: FPX3-869-20
• Description: MODULE, TRANSCEIVER, 500MW, UHF
• Manufacturer: RADIOMETRIX

Specifications of FPX3-869-20

• Rohs Compliant: YES

Pin Description
NOTES:
Radiometrix Ltd
Figure 3: FPX3 footprint (Top) view
Pins
RF
1A
2A
3A
4A
5A
6A
User
1
2
3
4
5
6
7
8
9
10
11
1. No inversion occurs between TXD and RXD.
2. P1 - P3 (parallel channel selects) and N_TXE are active LOW and have internal 47K pullups to 4v
3. RXD is an open collector output, with a weak pullup to 4v (approx 50K)
4. This radio has no 'internal modem' functions in this version.
5. Programming port (P0) operates at 2400 baud. (Command set specific to this design). The unit is
6. The high current (500mA maximum) transmitter supply (5v regulated) is fed to a separate pin, on the
7. 10% duty cycle: While the FPX3 is capable of transmitting continuously (the case temperature will
capable of operating in 'basic' parallel channel select only mode, or in serial controlled 'expanded'
mode
RF out connector.
The V supply (pin 4 on the user connector) also requires a 5v regulated supply, and draws up to
50mA
Both pins must be supplied at all times (most users connect them to a common +5v supply)
rise noticeably) this will be in contravention of the sub-band restrictions.
Units operating in the high power 869.4-869.65MHz sub-band are limited to 10% maximum transmit
duty cycle. It is the responsibility of the user to ensure that this restriction is complied with.
Alternatively, the user may wish to implement a listen-before-talk protocol (using the RSSI output).
See EN300-220 for further details
NO PIN
RF in/out
RF Gnd
GND
GND
Vcc (TX)
TXD
TXE
GND
Vcc
P3
P2
P1
PGM in
RSSI
RXD
AF out
Normal mode
0V
0V
DC coupled input for 5v pp CMOS logic waveforms
Transmit enable.
Low = TX mode
0V
Parallel channel select
Parallel channel select
Parallel channel select
DC level between 0.5V and 2.5V. 60dB dynamic range
Open collector output of data slicer. 47K pullup to 4V
500mV p-p audio. DC coupled, approx 0.8V bias
To the antenna
RF ground
+5V regulated supply for TX
DC supply input (+5V regulated)
Serial programming/control input (inverted logic level RS232)
FPX3 Data Sheet (preliminary)
7
8
page 3