RX Received Signal Strength Indicator (RSSI)
The RLC2 has wide range RSSI that measures the strength of an incoming signal over a range of 60dB
or more. This allows assessment of link quality and available margin and is useful when performing
range tests.
The output on pin 2 of the module has a standing DC bias of up to 0.4V with no signal, rising to 2.5V at
maximum indication (RF input levels of -40dBm and above).
∆Vmin-max
is typically 2V and is largely
independent of standing bias variations. Output impedance is 40kΩ. Pin 2 can drive a 100mA meter
directly, for simple monitoring.
Figure 6: RSSI level with respect to received RF level at RLC2 antenna pin
Low Cost TLC2 transmitter differs from standard BMT2 transmitter in the following key features.
BMT2
Industry standard (extra 2 pins)
400-480MHz (any 5MHz band)
32 parallel or 256 serial
5 bit optional
4 pins (and 1 jumper link)
Pin 2
Pin 4
1200 baud modem
2.4V-15, 40mA
TLC2
Industry standard
433.875 - 434.650Hz (only)
32 parallel/serial
Not available
4 pins (and 1 jumper link)
Via S0/PGM pin
not present on TLC2
Not available
4V-15, 32mA
Footprint
Frequency band
Channels
Channel select switches
Parallel channel select
Serial Frequency programming
Transmit Enable
Modem
Supply
Low Cost RLC2 receiver differs from standard BMR2 receiver in the following key features.
BMR2
Industry standard
400-480MHz (any 5MHz band)
32 parallel or 256 serial
5 bit internal
4 pins (and 1 jumper link)
-
Via RSSI/PGM pin
1200 baud modem
3.7V-15, 18mA
65dB-70dB
-118dBm
TLC2/RLC2 Data Sheet
Footprint
Frequency band
Channels
Channel select switches
Parallel channel select
SAW front end filter
Serial Frequency programming
Modem
Supply
Spurii
Sensitivity
Radiometrix Ltd
RLC2
Industry standard
433 – 435 MHz
32 parallel/serial
Not available
4 pins (and 1 jumper link)
Yes
via S0/PGM pin
Not available
3.7V-15, 20mA
<-60dB
-120dBm
page 9
RADIOMETRIX [ RADIOMETRIX LTD ]
