UHX1-144-5 Datasheet, PDF (6/7 Pages) Radiometrix Ltd – NBFM Multichannel 500mW VHF Transceiver

2. The command interpreter IS case sensitive. Use upper case.
3. Spaces are optional (they are not decoded), provided the command line does not exceed 16
characters.
4. When manually programming this unit we recommend setting your terminal to local echo. The
'backspace' key functions normally.
5. All serial communications use 9600baud 'inverted RS232' 8 bit data, no parity, 1 start bit, 1 or
2 stop bits
6. A simple 'driver' program will be made available to simplify programming of these units, if
desired.
7. RSSI read operations only function correctly if the unit is in RX mode (TXE pin is high or
floating)
Condensed specifications (All details are provisional)
Frequency
Frequency stability
Channel spacing
Number of channels
Any 2MHz segment in 140 - 175MHz
(TX and RX frequencies need not be the same)
+/-5ppm (better than ±1.5kHz)
20kHz or 25kHz (12.5kHz by special order)
128 channels by serial RS232 interface or 16 by parallel select
Supply
Receive
Transmit:
Operating temperature
Spurious radiations
3.1 -15V at 24mA
5.0V regulated 55mA (at 10mW output)
270mA (at 500mW output)
(plus 20mA at 3.6-15v from pin4: Vcc)
-20 to +70 C (Storage -30 to +70 C)
Compliant with ETSI EN 300 220-3 and EN 301 489-3
Interface
User
RF and TX supply
Reprogram
Recommended PCB hole size
Size
11 pin 0.1" pitch molex
6 pin 0.1" pitch molex
5 pin 0.1" pitch socket in top of case
1.2mm (min.)
67 x 30 x 12mm
Transmitter
Output power
TX on switching time
Modulation type
TX modulation bandwidth
Deviation
Adjacent channel TX power
TX spurii
Inputs
500mW (+27dBm); Adjustable via serial command 1 - 500mW in 1dB steps)
<50 ms
FM, FSK (F1D, F3D)
DC – 3kHz
±3kHz (±1.5kHz for 12.5kHz channel variant)
-37dBm
<-40dBm
Data (CMOS/TTL compatible)
Receiver
Sensitivity
image / spurious
blocking
adjacent channel
Outputs
-118dBm for 12dB SINAD
-65dB
-86dB
-65dB (tested per ETSI EN300 086)
RSSI, Audio, Data
Dynamic timing
RX data recovery settling time
Power on to stable (50:50
mark / space) RXD
Maximum time between data
transitions
20ms
50ms (TXE low/active to stable RX data out)
250ms
Radiometrix Ltd
UHX1 Data Sheet (preliminary)
page 6