Comtech EF Data VIPERSAT File Streamer v1.2.x - Manual (Page 45)

Appendix A - Glossary A-1
A
P P E N D I X
G
LOSSARY
A
ALC Automatic Limit Control is a closed loop mechanism controlling the gain
stabilization of the HPA’s RF output power.
APL Asynchronous Party Line – A VIPERSAT term for RS-485 multi-drop bus used
for control of indoor equipment. See also SPL.
ARP Address Resolution Protocol – A protocol for a LAN device to determine the
MAC address of a locally connected device given its IP address. See also MAC.
ATM Asynchronous Transfer Mode
B
BER Bit Error Rate (sometimes Ratio) – A measure of the number of data bits
received incorrectly compared to the total number of bits transmitted.
BUC Block Up Converter
BPS Bits Per Second – A measure of transmission speed. See also Kb/s &
Mb/s.
BPSK Binary Phase Shift Keying – A modulation technique in which the carrier is
phase shifted +/- 180 degrees. See also QPSK.