packet switching 分组交换
pad(programme associated data) 节⽬伴随数据
pay-tv：付费电视
pcn(personal communication network) 个⼈通信
pcs(personal communication rvice) 个⼈通信业务
pd(power-double) 功率倍增(放⼤器)
pdfa(praodymium-doped fiber amplifier) 掺镨氟化物光纤放⼤器
pdh(pudo－synchronous digital hierarchy) 准同步数字序列
pha 相位
physical layer 物理层
pi(programme identification) 节⽬识别
picture 图像
pilot frequency：导频
pin(positive-intrinsic-negative) 正－本征－负(⼆极管)
power 电源，功率
pp(push-pull) 推挽
ppc(pay-per-channel) 按频道付费
ppv(pay-per-view) 按次付费
prbs(pudo-random binary quence) 伪随机⼆进制序列
prentation layer 表⽰层
pri(primary rate interface) 初始速率接⼝
programmable channel 可编程序频道
pstn(public switching telecommunication network) 公共交换电信
qos(quality of rvice) 服务质量
rdi(receiver data interface) 接收机数据接⼝
rds(radio data system) ⽆线数据系统
receiver 接收机
remote head end：远地前端
rf(radio frequency) 射频
rin(relative intensity noi) 相对强度噪声
router 路由器
s/n(signal to noi ratio) 信噪⽐
sa(rvice area) 服务区
sbs(stimulated brillouin scattering) 受激布⾥渊散射
s-cdma(synchronous code division multiple access) 同步码分复⽤
scpc(single channel per carrier) 单路单载波
scte(society of cable telecommunication engineers) (美国)有线电视通信⼯程师协会sdh(synchronous digital hierarchy) 同步数字序列
sdm(space division multiplexing) 空分复⽤
sdma(space division multiple access) 空分多址
lf－healing ⾃愈
sr(verely error cond ratio) 严重误码秒率
ssion layer 会话层
sfn(single frequency network) 单频(同步)
sid(rvice identifier) 服务识别码
signal 信号
smf(single mode fiber) 单模光纤
smr(signal to mask ratio) 信号掩蔽⽐
sms(state monitoring system) 状态监测系统
smt(state monitoring transponder) 状态监测转发器
snap(sub-network access protocol) ⼦访问协议
snmp(simple network management protocol) 简单络管理协议
snr(signal to noi ratio) 信号噪声⽐
sonet(synchronous optical network) 同步光纤
sr(symbol rate) 符码率
stb(t－top box) 机顶盒
sti(rvice transport interface) 业务传输接⼝
stm(synchronous transport module) 同步传递模块
stn(rvice transport network) 业务传输络
stp(shielded twisted pair) 屏蔽双绞线
subch(sub-channel of the main rvice channel) 主业务信道的⼦信道
subchid(sub-channel identifier) ⼦信道标志
subid(sub-identifier of a transmitter) 发射机⼦识别
switch 开关，转换
system outlet 系统输出⼝
tcp(transmission control protocol) 传输控制协议
tdm(time division multiplexing) 频分复⽤
tdma(time division multiple access) 频分多址
te(terminal equipment) 终端设备
terminal 终端
threshold value 阈值
threshold 门限
tm(terminal multiplexer) 终端复⽤器
tm(traffic management) 流量管理
tmc(traffic message channel) 交通信息信道
transmitter 发射机
transport layer 传输层
trunk feeder system ⼲线系统
tune 调谐
tuner 调谐器
twa(two-way addressable) 双向寻址
two-way catv 双向有线电视
uc(up converter) 上变频器
uhf(ultrahigh frequency) 特⾼频
ulf(ultralow frequency) 特低频
uni(ur network interface) ⽤户接⼝
upstream 上⾏
utp(unshielded twisted pair) ⾮屏蔽双绞线
v/a(the vision to audio carrier power ratio) 图像－伴⾳载波功率⽐vc(virtual capsule) 虚容器
vcco(voltage controlled crystal oscillator) 压控晶体振荡器
vco(voltage controlled oscillator) 压控振荡器
vdsl(very high bit－rate digital subscriber line) 超⾼速数字⽤户线vdt(video dail-tone) 拨号视频(业务)
vhf(very high frequency) 甚⾼频
vod(video on demand) 视频点播
vsb-am(vestigial sideband-amplitude modulation) 残留边带调幅vswr(voltage standing wave ratio) 电压驻波⽐
wan(wide area network) ⼴域
wave 电波
wdm(wavelength division multiplexing) 波分复⽤
ws(work station) ⼯作站
www (world wide web)万维
