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PDF TX1-xxx.xxx-10 Data sheet ( Hoja de datos )
| Número de pieza | TX1-xxx.xxx-10 | |
| Descripción | VHF Narrow Band FM Transmitter and Receiver | |
| Fabricantes | Radiometrix | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TX1-xxx.xxx-10 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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Radiometrix
www.DataSheet4U.com
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
IssueV2H, 1F7 ONcatrorboewr 2B0a0n5Tdel:F+4M4 (0)D20 8a90t9a95T95,rFaaxn: +s4m4 (0i) t20te89r09a22n33d Receiver MoTdXu1le&s RX1
VHF Narrow Band FM Transmitter and Receiver
The TX1 and RX1 form a miniature
VHF radio transmitter/receiver pair
designed for PCB mounting and
suitable for extended range data
links at speeds up to 10kbps.
Link ranges of 10km+ are achievable
with suitable choice of data rate and
antennas.
Features:
left: TX1 transmitter
right:RX1receiver
CE Certified by independent Notified Body
Verified to comply with harmonised radio standard ETSI EN 300 220-3 and EMC standard ETSI
EN 301 489-3 by accredited Test Laboratory
Frequencies available as standard: 173.225MHz, 173.250MHz
Other frequencies from 151.300MHz to 173.250MHz available to order
Data rates up to 10 kbps with 25kHz channel spacing
Usable range to 10km+
Screened construction
Available for licence-exempt operation in the UK 173MHz bands, the TX1 & RX1 modules combine
effective screening with internal filtering to minimise spurious radiation and susceptibility thereby
ensuring EMC compliance. They are particularly suitable for one-to-one and multi-node wireless links
where longer ranges are required at low to moderate data rates. Applications include building security,
EPOS and inventory tracking, remote industrial process monitoring and data networks. Because of
their small size and low power consumption, both modules are ideal for use in battery-powered portable
applications such as hand-held terminals.
Transmitter - TX1
2 stage crystal controlled, NBFM modulated at up to 10 kb/s
Operation from 2.2V to 12V @ 9.5mA
Built-in regulator for improved stability and supply noise rejection
Exceptional power efficiency, typically 35% DC → RF @ 3V supply
+10dBm (10mW) RF output
Harmonics typically -70dBc
Enable facility
Receiver - RX1
Single conversion NBFM superhet
Image rejection >50dB
Operation from 2.7V to 12V @ 12mA
Built-in regulator for improved stability and supply noise rejection
10kbps, -116dBm sensitivity @ 1ppm BER
RSSI output with >80dB range
Local oscillator leakage <-60 dBm
Enable facility
Radiometrix Ltd., TX1 & RX1 Data Sheet
page 1
1 page  
Performance specifications: RX1 receiver
(Vcc = 3.0V / temperature = 20°C unless stated)
www.DataSheet4U.com
pin min. typ.
DC supply
Supply voltage
Supply current
7 2.7
7
3.0
12
RF/IF
RF sensitivity @ 10dB (S+N)/N
RF sensitivity @ 1ppm BER
IP3 at RF input
RSSI threshold
RSSI range
IF bandwidth
Image rejection
Adjacent channel rejection
Spurious response rejection
LO leakage, conducted
LO leakage, radiated
1, 8
1, 9
1
1, 5
1, 5
1
1
1
1
80
50
50
70
-119
-116
-28
-127
90
15
55
55/60
100
-70
-70
Baseband
Baseband bandwidth @ -3dB
AF level
DC offset on AF out
Distortion on recovered AF
Load capacitance, AFout / RXD
8
8
8
8
8, 9
0.05
0.7
400
1.0
1
Dynamic timing
Power up with signal present
Power up to valid RSSI
Power up to stable data
4, 5
4, 9
4
16
Signal applied with supply on
Signal to valid RSSI
Signal to stable data
1, 5
1, 9
0.4
4
Time between data transitions
Mark : space ratio
9
9
1.8
20
50
max. units
12 V
14 mA
-115
-112
-65
-60
dBm
dBm
dBm
dBm
dB
kHz
dB
dB
dB
dBm
dBm
6 kHz
mVP-P
1.3 V
10 %
100 pF
5 ms
20 ms
0.6 ms
12 ms
0.1 ms
80 %
notes
1
1
2
3
3
1, 4
5
6
7
8
Notes:
1. See applications information for further details.
2. Typically 55dB @ +25kHz offset, 60dB @ -25kHz offset.
3. Exceeds EN/EMC requirements at all frequencies.
4. Lower limit can be extended to DC if required, by means of external circuitry.
5. For received signal with ±3kHz FM deviation.
6. Typically 4ms for signal at channel centre, maximum 12ms at ±4kHz RF offset.
7. For 50:50 mark to space ratio (i.e. squarewave).
8. Average over 50ms period at maximum bit rate.
Radiometrix Ltd., TX1 & RX1 Data Sheet
page 5
5 Page 
410mm @ 173MHz
www.DataSheet4U.com
Whip antenna
R wire, rod, PCB track
F or a combination of these
length(mm) = 71250 / freq(MHz)
Helical antenna
35-40 turns wire spring
R
F
length 120mm, dia 10mm
trim wire length or expand coil for
best results
Ctune
Loop antenna
RF
Cmatch
track width = 1mm
min. area 500mm2
capacitors may be variable or fixed
(values depend on loop dimensions)
RF GND
Fig.10: integral antenna configurations
Integral antenna summary:
Ultimate performance
Ease of design set-up
Size
Immunity to proximity effects
whip
***
***
*
**
helical
**
**
***
*
loop
*
*
**
***
Tamper-proof integral antenna
Where the RX1 is used in alarm applications it may sometimes be necessary to provide a warning if any
attempt is made to remove or disable its antenna. A typical solution to this problem is as follows:
1/4 wave
hairpin loop
antenna
123
1n
R1
RX1
4 56789
R2
to comparator circuit, etc.
Fig.11: Tamper-proof antenna arrangement
In normal operation the output will have a resistance to ground of R1+R2. If the antenna is shorted to
ground it will show R2 only, and if the antenna is cut it will be open-circuit.
R1 and R2 may be any value over 1kΩ. All track lengths should be kept to a minimum and the output
may need to be decoupled in some cases to avoid noise being injected into the antenna from the
following circuitry.
Radiometrix Ltd., TX1 & RX1 Data Sheet
page 11
11 Page | ||
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| PDF Descargar | [ Datasheet TX1-xxx.xxx-10.PDF ] | |
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