Javad UHFSSRx, Руководство пользователя

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Rx Displays the initial frequency of the receiver
T
-30°C to 100°C – Displays the temperature inside
of enclosure
The STATE command without Parameter Name indi-
cates all values:
Region =1
Tx =915000000
Rx =915000000
T=46.00
IC
The IC command prints string:
IC: 3504A-FH915
@00
FCC ID
The FCC ID command prints string:
FCC ID: WJ4FH915
@00
GTX
The GTX command allows get from port the Number
of transmitted bytes.
GTX [Parameters List]
Parameter
List
Short Description
0
0 – Disable send to port the Number of the trans-
mitted bytes (a default setting).
1
1 – Enable send to port the Number of the trans-
mitted bytes.
RSS
The RSS command send to port the string: 00 0031
-85.7
Where: 0031 - the received Packets Number;
00 - the received Packets Number with bad
Checksum;
-85.7 - RSSI (dBm) calculated along the last
Packet;
After reading both the received Packets Number and
the received Packets Number with bad Checksum are
cleaned.
RSSI
The RSSI command send to port RSSI (dBm) calculat-
ed along the last Packet.
RSSM
Modem stores the last RSSI values for each particular
frequency on which a subpackage was received. An
array of the last RSSI for 128 possible frequencies can
be read by command “rssm\n”.
RSSC
The command RSSC clears particular RSSI values ob-
tained by using the command RSSM to default value
-140.7 dBm.
RNSS
The command RNSS prints last Noise Strength mea-
sured between Data Sabpackages.
NSCN
The command NSCN allows to get the power of noise
and interference for 128 frequencies from 902200000
to 927600000.
NSCN [Parameters List]
Parameter
List
Short Description
d d – threshold, dB
SCAN
The command SCAN allows to get the power of noise
and interference for defined range of frequency with
defined step.
SCAN [Parameters List]
Parameter
List
Short Description
ddddddddd
DDDDDDDDD
sssss
ddddddddd – Begin frequency, Hz
DDDDDDDDD – End frequency, Hz
sssss – step, Hz
SCNS
The command SCNS stop scanning.
Modem protection from interference
If interference contains a big power at some frequen-
cy such frequency (“unwanted frequency”) can be
excluded from the use. To eliminate unwanted fre-