d15 Modem Integration and Application Developers Guide version draft 0.53 Page 87 of 181
Abbreviation
Description
PMIT
Packet modem integration test
POST
Power-on self test
Ppm Parts
per
million
QFP
Quad flat pack
R&D
Research and development
RAM Random-access memory
Rayleigh
A measure of multi-path fading depth of a signal
RC Resistor-capacitor
RF Radio
frequency
RFI Radio-frequency
interference
RGxxx Cabling
designation
number
RLP
Radio link protocol, a sophisticated error-correcting system
RMA
Return material authorization
RNC Radio
network
controller
RPM Radio
packet
modem
RS-232
The EIA standard for a serial data interface
RSSI
Received signal strength indicator
RTU
Radio Training Utility
Rx
Receive or reception
SAP0
A specific service access point
Schottky diode
A diode with low forward voltage drop and fast switching
SCR
Standard context routing
SDK
Software developers kit
SDU
Service data unit
SFR Single-frequency
reuse
SINAD
Ratio (measured in dB) of signal to noise-plus-distortion
SMA Sub-miniature
connector
SMB Sub-miniature
connector
SMS
Short message service
SNR Signal-to-noise
ratio
SPDT
Single pole, double throw (switch)
SPI
Serial peripheral interface
SRAM
Static random-access memory (static RAM)
TA
Terminal Adapter. Equivalent to DCE. e.g. the d15 module.
TBD
To be determined
TE
Terminal Equipment. Equivalent to DTE. e.g. a laptop computer or OEM device.
TNC
Industry standard connector type
Transorb Transient
absorber
TTO
Transmitter turn-on time