Terrasat Rx 1+1, Operation Manual

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5-6
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Monitor and Control Features and Functions
Frequency Shift Keying (FSK)
Frequency shift keying (FSK) and RS485 operate in ASCII mode and share a common
address. The message formats for both FSK and RS485 are the same. Receiver link
specifications are provided in
Table 5.2 .
FSK data is transmitted at 9600 baud with 8 data bits, no parity, no flow control, and
one stop bit.
Synchronization is maintained by the following method:
1. Once a
<
character is received, the link will be in sync. A state machine passes the
ASCII characters
The Rx 1+1 system is capable of responding to messages at a rate of one every
20 ms.
2. If the Rx 1+1 system does not respond within the maximum response time, the
command should be cyclically repeated.
Ethernet
Using Ethernet, you can communicate with the Rx 1+1 system through Telnet
(ASCII), the on-board Web server (HTTP), or through SNMP. The Rx 1+1 system
uses a static IP addressing structure and does not support DHCP. The Rx 1+1 system
is factory-configured as follows:
IP Address 192.168.1.254
IP Gateway 192.168.1.1
Subnet Mask 255.255.255.0
Telnet Port 23
Note:
Your computer should have a static IP address on the same subnet as the Rx 1+1
interface module. Using a suitable cable, connect the computer to the J1 connector on
the interface module.
Note:
An Ethernet hub will function with a straight connect cable. If an Ethernet hub is not
used to connect to the interface module, a crossover cable must be used instead.
Table 5.2
Receiver Link Specifications
Locking Range
±32.5 KHz
Input Impedance
50 Ω
Input Sensitivity
-15 dBm