Furuno FV-110, Operator'S Manual, Page: 162 / 240

COMTECH 570L
C-20
Connections
Connect the ACU and the COMTECH 570L with the following cables:
• Standard RS-232 serial cable (using 300KHz Narrow Band tracking receiver)
• Or COMTECH Serial & RSSI cable (using Modem RSSI tracking)
• 2 pcs. 75 Ohm RF cables F-F connectors for rx and tx frequencies.
Figure C-14: Connecting COMECH 570L to the ACU (example)
In most cases it is recommended to use the antenna that is built-in in the 300 KHz narrow
band tracking receiver to track the satellite, and you can connect the ACU to the VSAT
modem with a standard RS-232 serial cable.
For Modem RSSI tracking use a cable according to the specifications at Modem Cable
COMTECH Serial & RSSI TT7016A on page B-2 (part number: 407090A-021).
Command Description
EBN?
This command is used to show the signal strength in the web interface and
on the display of the FV-110 to determine if the COMTECH 570L modem
is in Rx Lock.
The signal strength goes from 0dB - 16dB, +16dB indicates a signal
greater than 16dB, 99.9dB indicates no Rx Lock.
TFQ? TFQ (Transmit Frequency) is used to calibrate the Tx chain in real time, in
order to have same output power independent of frequency, temperature
and antenna cable length.
LLO? LLO (LNB LO) is used to set up the LNB LO frequency for the system.
All LNB LO frequencies are supported by FV-110.
BLO? BLO (BUC LO) is used to read the BUC LO. This makes the ADU
compatible with future FV-110 products using a different BUC LO.
RFQ? RFQ (Receive Frequency) is used as tracking frequency for FV-110.
Table C-7:
Note
The BUC LO (BLO) must always be 12800 MHz for FV-110.