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參數(shù)資料
| 型號(hào)： | QMR2 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | QM Receiver Module |
| 中文描述： | 質(zhì)量管理接收模塊 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 97K |
| 代理商： | QMR2 |
Ds302_3 AUG 01
ó
2001 REG No 277 4001 England
Page 4
QM Receiver Module QMR1 / QMR2
QMR2 Details
QMR2
1
2
3
4
5
6
7
Figure 3 QMR2 Receiver
Pin Description:
RF IN ( pin 1 )
50 ohm RF input from antenna, connect using
shortest possible route. This input is isolated from
the internal circuit using the air gap of the front
end SAW RF filter.
RF GND ( pin 2 )
Supply ground connection. Preferably connected
to a solid ground plane.
RSSI ( pin 3 )
This is a dc output voltage that is proportional to
the RF signal strength applied to pin 1.
GND ( pin 4 )
Connected to power supply ground.
Vcc ( pin 5 )
+Ve supply pin. Operation from a 5V supply able
to source 6mA at less than Vp-p ripple.
AF ( pin 6 )
Audio frequency output. Note Source current is
limited to 40 microA. In most applications a buffer
may be required to interface to this pin.
DATA OUT ( pin 7 )
CMOS compatible output. This may be used to
drive external decoders.
General Information
Phase
Lock
Loop
RF
Band Pass
Filter
IF
Low Pass
Filter
Detector
Antenna
Mixer
Figure 4: Receiver Block Diagram
The QMR2 receiver module is a FM single
conversion superhet receiver capable of handling
data rates of up to 10Kbits/s. With an on board
data buffer, phase locked loop and a high quality
front end RF stage, a –107dBm sensitivity is
achieved.
Utilising the latest phase locked loop receiver
technology with one of the compatible transmitter
modules will yield a highly efficient wireless link.
RSSI
Values
RF Level (dBm) pin 3
RSSI (volts) pin 6
-110
1.16
-100
1.34
-90
1.59
-80
1.78
-70
1.81
-60
1.81
-50
2.17
-40
2.45
-30
2.52
-20
2.52
-10
2.52
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