X7000 RFSOLUTIONS [rfsolutions.ltd], X7000 Datasheet - Page 2

• Manufacturer Part Number: X7000
• Description: 458MHZ RF SYNTHESISED TRANSCEIVER
• Manufacturer: RFSOLUTIONS [rfsolutions.ltd]

DS007_2
Frequency of Operation
The transceiver operate on the 458.500MHz to 458.950MHz telemetry band. There are 32 channels within
this band at 12.5KHz or 15 channels at 25KHz bandwidth.
The 5 DIL switches accessed from the top of the module set the RF frequency after power is applied or a
RST has occurred. The following frequencies will be set on the standard UK version:
* Excluded from MPT1329 approval and cannot be used for transmission.
Radio Propagation
With any radio system, there are a number of factors affecting the system performance. These are
Antennas
The types of antenna we recommend for this Modem are;
Helical : The smallest, most compact antenna, has a gain of 0.5, designed for short ranges up to 2km
1/4 Wave Flexi : General purpose antenna with gain <1 gives slightly better range than Helical
Yagi : A highly directional antenna (Looks similar to a standard TV aerial). Typically has a gain of >2dB. The
output power of a transmitter connected to a Yagi must be reduced in order to comply to the DTI
specifications. This does however have the advantage of reducing the power consumed by the transmitter to
achieve the same range. By connecting a Yagi to a receiver, the system range may be extended to 20km.
Note : Try to keep the feed wire to the antenna as short as possible, If the antenna is to be mounted some
distance away 50
Ch No (Hex) Frequency (MHz)
O
O
1A*
20*
0A
0C
0E
1C
1E
c
c
02
04
06
08
10
12
14
16
18
22
t
t
0
0
Transmitter power output
Height of transmitter and receiver antenna
Length of feeder cables to the antenna
Type and efficiency of antenna
Surrounding topography
The weather
0
0
low loss co-axial cable should be used as the interconnection.
458.825*
458.900*
458.525
458.550
458.575
458.600
458.625
458.650
458.675
458.700
458.725
458.750
458.775
458.800
458.850
458.875
458.925
458MH
Z
RF S
2000 REG No 277 4001, ENGLAND.
SW5
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
YNTHESISED
SW4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
T
SW3
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
RANSCEIVER
ON
ON
ON
ON
ON
ON
ON
ON
ON
SW2
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
Page 2
SW1
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
X7000