美国百威TLS系列音箱
老音箱
·TLS-1 两分频，连续功率70W，8欧姆，频响80Hz~17KHz，......
·TLS-2 两分频，连续功率150W，8欧姆，频响65Hz~17KHz，......
·TLS-3 两分频，连续功率75W，8欧姆，频响70Hz~17KHz，......
·TLS-4 两分频，连续功率250W，4欧姆，频响70Hz~17KHz，......
·TLS-5 两分频，连续功率150W，8欧姆，频响60Hz~17KHz，......
·TLS-SUB 超低音，连续功率250W，8欧姆，频响55Hz~250Hz，......
·112-TLM/TLM-2 返听音箱，连续功率100W，8欧姆，频响75Hz~17KHz，......
·115-TLM/TLM-5 返听音箱，连续功率100W，8欧姆，频响75Hz~17KHz，......
·MINI-MONITOR II 返听音箱，连续功率50W，16欧姆，......
·115-TLS 两分频，连续功率150W，8欧姆，频响60Hz~17KHz,......
·1210-TLS 三分频，连续功率150W，8欧姆，频响65Hz~17KHz,......
·112-M 返听音箱，连续功率65W，8欧姆，......
·112-HS 返听音箱，内置功放：75W，频响75Hz~17KHz,......
·SP-1G 两分频，连续功率450W，8欧姆，频响63Hz~19KHz，......
·SP-2G 两分频，连续功率300W，8欧姆，频响65Hz~17.5KHz，......
·SP-3G 三分频，连续功率350W，8欧姆，频响54Hz~17KHz，......
·SP-7G 两分频，连续功率600W，4欧姆，频响48Hz~18KHz，......
·SP-118SUB 超低音，连续功率350W，8欧姆，频响48Hz~1KHz，......
ICP DAS CO., LTD Website: Vol. 1/2
Voltage Attenuator and Current Transformer2020.6DNM-848VI-10VDNM-848VI-80VDNM-848VI-150VDNM-843VI-600VDNM-843VI-800V8-channel Voltage Attenuator with channel to channel isolation3-channel Voltage Attenuator with channel to channel isolation ®Applications ®IntroductionThe DNM-843VI series and DNM-848VI series are voltage input attenuator. The maximum input range is from ±80 to ±800 V can be attenuated to ±10 V. provide 3000 VDC intra-modules isolation and 3000 VDC channel to channel isolation to avoid the noise interference from inputs to outputs or channel to channel. It can be used with the analog input modules such as I-7017, I-87017, M-7017RMS and I-87017W-RMS etc. to measure the high voltage. ¯Features AC/DC Source Input High Voltage Input Measurement Linear Attenuation Ratio High Input Impedance Channel to Channel Isolation 4 kV ESD Protection 3 kV Surge Protection Easily Wire Connection -84DN-xMxxV: VoltageInput Voltage RangeNumber of Channels3: 3 channels8: 8 channelsM: MetalxI: Channel to Channel Isolation ®Selection Guide ®AppearanceDNM-848VI-10V/DNM-848VI-80V/DNM-848VI-150VDNM-843VI-600V/DNM-843VI-800V ICP DAS CO., LTD Website: Vol. 2/2 DNM-843VI-600V CR3-channel 600 VDC Voltage Attenuator with channel to channel isolation (Metal) (RoHS)DNM-843VI-800V CR3-channel 800 VDC Voltage Attenuator with channel to channel isolation (Metal) (RoHS)DNM-848VI-10V CR8-channel 10 VDC Voltage Attenuator with channel to channel isolation (Metal) (RoHS)DNM-848VI-80V CR8-channel 80 VDC Voltage Attenuator with channel to channel isolation (Metal) (RoHS)DNM-843VI-150V CR8-channel 150 VDC Voltage Attenuator with channel to channel isolation (Metal) (RoHS)2020.6 ®Specifi cationsModelsDNM-843VI-600VDNM-843VI-800VDNM-848VI-10VDNM-848VI-80VDNM-843VI-150VEMS ProtectionESD (IEC 61000-4-2)±4 kV contact for power line, input and output channels, ±8 kV air for random pointSurge (IEC 61000-4-5)±3 kV for power linerAnalog InputChannels38TypeAC/DC VoltageRange±600 Vpp±800 Vpp±10 Vpp±80 Vpp±150 VppAccuracy1% of FSRBandwidth100 KHz30 KHzInput Impedance>1 MΩChannel-to-Channel Isolation3000 VDCIntra-module Isolation3000 VDCAnalog OutputChannels38TypeAC/DC VoltageRange±10 VppPower InputInput Range+10 ~ +24 VDCPower Consumption0.56 W9.2 WMechanicalCasingMetalDimensions (W x L x D)173 mm x 122 mm x 25 mm173 mm x 122 mm x 35 mmInstallationDIN-Rail MountingEnvironmentOperating Temperature-25 ~ +75 °CStorage Temperature-30 ~ +75 °CHumidity10 ~ 90% RH, Non-condensing ®Ordering Information ®Dimensions (Units: mm)MDR-20-24 CR24 V/1 A, 24 W Power Supply with DIN-Rail Mounting (RoHS)I-7017-G CR8-channel Analog Input Module with DCON Protocol (Gray Cover) (RoHS)I-87017-G CR8-channel Analog Input Module (RoHS) ®Accessories35.041.035.441.24.0122.0117.6173.0Left ViewFront View173.0117.6122.025.020.841.035.541.14.0Left ViewFront View
100W Ultraminiature Open Frame Switching Power SuppliesLFM100 series
300 Myles Standish Blvd., Taunton, MA 02780Ph: 1-800-823-8082 Fax: 508-823-8181
Universal 85-265VAC InputHigh EfficiencyRegulated Outputs3000V IsolationSingle OutputsUL60950 & EN60950 Approved
Model Number Output Voltage Output Amps(max)
0.156” SPACED CONNECTORS
LFM100-5 5 VDC 20A
LFM100-9 9 VDC 11.2A
LFM100-12 12 VDC 8.4A
LFM100-15 15VDC 6.7A
LFM100-18 18VDC
5.6A
LFM100-24
24VDC
4.2A
LFM100-48 48VDC
2.1A
Order On-Line!3”W x 5”L x 1.24”H3”W x 5”L x 1.34”H (5V Output)元器件交易网100W Ultraminiature Open Frame Switching Power SuppliesLFM100 series
300 Myles Standish Blvd., Taunton, MA 02780
Ph: 1-800-823-8082 Fax: 508-823-8181
INPUT SPECIFICATIONS
Input Voltage Range 85-265 VAC (See Note 2)
收音机（FM/AM）的基本原理及相关重要指标定义、标准及具体测试方法
第一节 AM BAND （调幅式收音机）
基本原理
广播电台将声音信号加到高频电波上即“调制”，意思即用音频信号去调制高频电信号，使高频信号的幅度、频率或相位随音频信号的变化而变化。“连载”音频信号的高频信号即“载波”。
所谓“调幅”是使高频载波的幅度随音频信号的变化而变化。但载波的频率不变，经调幅后产生的信号为“调幅波”。
以下为调幅收音的基本方框图：
收音机调试位说明
1.中频位（IF位）
1、中频位有AM中频和FM中频，统称IF位，IF位主要是用来调较中频频率和增益的，按规定AM中频一般为450KHZ/455KHZ/465KHZ 、FM为10.7MHZ。
2、IF位需用仪器：AM中频信号仪、FM中频信号仪、高频示波器、信号衰减器。
3、 按图接好仪器与机架
输入电路 混频
本振 第一中放 第二中放 检波 前置放大 功率放大
F.SA.SF.MA.MF.RFA.RF19.5T10430P104天线次级中频输出高频信号线机架接、唛架仪AM.IFFM.IF
衰减器高频示波器W1W2
信号仪上的信号点信号（M）经开关W1转换后，输入到高频示波器背后信号点输入端，为示波器提供频率标点；信号仪上的水平信号（S）经开关W2转换后，输入到高频示波器背后的水平输入端，为示波器提供较机水平线。AM IF信号（ARF）经衰减器调节后从天线（AM COIL）次级输入；FM IF信号（FRF）经衰减器调节后接到机板的FM 19圈半输入（或者接到天线输入端）。AM、FM的振荡用104电容短路接地，输出检波/鉴频信号经104 电容耦合接高频示波器INPUT端。
4、将样机放入机架上（样机调试方法后面介绍）调节衰减器、示波器，使AM/FM波形适中且信号不能过强，否则看不出低机，样机波形用标记贴于示波器上，方便较机员鉴别好坏机。
5、IF位波形AM中频要求455时，
