RAD-ISM-900-EN-BD…
6-4
PHOENIX CONTACT
2476_en_I
6.2
RSSI (Received Signal Strength Indicator)
The RSSI test point allows measurement of the received radio signal at each slave radio
(see Figure 6-2). RSSI will not function on a master because there is no method of
determining which slave is connected. The RSSI is a voltage output, ranging from
0-3.5 V DC, and can be measured using a standard voltmeter.
The positive connection for the multimeter is made on the RSSI test point of the radio and
the negative connection to the power supply ground. An adapter is available that will
connect to the RSSI connector to allow permanent monitoring of the RSSI voltage
(Order No. 0201744 for the test connector and Order No. 0201663 for the insulating
sleeve).
Figure 6-2
RSSI voltage strength check
Figure 6-3
Signal strength to voltage comparison
RAD-ISM-900-EN-BD
FLBL-2938-03R2
Transmit
Receive
Po
wer
RF Link
Positive probe (–) to
RSSI connector
Common probe (–) to
terminal No. 2 (GND)
0 to 3.5 V DC
-105
-100
-95
-90
-
8
5
-
8
0
-75
-70
-65
-60
-55
-50
1.50
2.00
2.50
3
.00
3
.50
Volts
dB
m
500 kbps
250 kbps
125 kbps
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-12970-Phoenix-Contact-2900016-Radio-900-MHz-Ethernet-Radio.aspx
