Cisco Prisma II Installation And Operation Manual page 109

Glossary
, Continued
PLL
PROM
PWB
QAM
QPR
QPSK
RC
Redundant
Reverse path
RF
RF Bypass
RFI
RMA
RMS
Router
RS
RX
SAM
SAT
S-band
SET
Glossary-8
Phase Lock Loop. An electronic servo system controlling an
oscillator to maintain a constant phase angle relative to a
reference signal.
Programmable Read Only Memory
Printed wiring board
Quadrature Amplitude Modulation
Quadrature Partial Response
Quadrature Phase-Shift Keying
Reverse conditioner
A secondary or backup (electronic) system
Signal flow direction toward the headend.
Radio frequency
A bypass feature that allows subscribers to view a clear
analog channel while recording a digital or analog channel
on a VCR.
Radio frequency interference
Return material authorization
Root Mean Square
A data communications device which examines a packet
and routes the packet to an output port appropriate to the
packet destination.
Remote Sensing
Receive or receiver
Signal analysis meter
Site acceptance test
The group of frequencies between 2 and 4 GHz.
Secure electronic transaction
Glossary 78-715192-01 Rev C