二十五、自动频率控制 (AFC Control Range-3dB) (±250KHz-±200KHz) 先测好98MHz最大灵敏度,再增加发生器输入电平至60dB,关小音量至标准输出2V,再上偏调数码输入频率至输出降低-3dB,此时数码上偏调频率加上,下偏调降低3dB时的频率,即为被测机的自动频率控制。 二十六、通频带 (-6dB Band width) (10KHz...
二、AM的各项重要指标的定义、标准及具体测试方法1、 FREQUENCY RANGE(频率覆盖范围)A、 定义:指收音机所能接收频率的范围。标准:520KHZ1730KHZ;LIMIT:530KHZ1700KHZ;频率覆盖宽一些可接受。(SPEC:+10KHZ)B、 测试方法及条件一词制频率1KHZ,调制度30%,RF信号强度86dB,音量输出标称电压,EQ放中间。a) 首先将...
1、FREQUENCY RANGE(频率覆盖范围) A、定义:指收音机所能接收频率的范围。标准:520KHZ~1730KHZ;LIMIT:530KHZ~1700KHZ;频率覆盖宽一些可接受。(SPEC:+10KHZ) B、测试方法及条件一词制频率1KHZ,调制度30%,RF信号强度86dB,音量输出标称电压,EQ放中间。 a)首先将PVC转到最低端,然后调整高频信号发生器频率使信号接...
A5. The Cover Range depends on 4 factors:1. Power from Transmitter; 2. Height of Antenna; 3. Gain from Antenna; 4. Around Environment. Then we can know the cover range of your station. Q6. Is the Frequency Adjustable? A6. FM Radio Band Frequency is 87~108MHz, TV Band Frequency inc...
A5. The Cover Range depends on 4 factors:1. Power from Transmitter; 2. Height of Antenna; 3. Gain from Antenna; 4. Around Environment.Then we can know the cover range of your station.Q6. Is the Frequency Adjustable?A6. FM Radio Band Frequency is 87~108MHz, TV Band Fr...
Band FM/AM/SW/CB/AIR/VHF Material ABS Plastic Weight 210g Size 103*60*15MM Battery 700mAH 3.7v lithium battery FM Frequency Range 87.5-108MHZ Air Frequency Range 118.00-138.00MHZ AM Frequency Range 520-1720KHZ SW Frequency Range 2.3-30MHZ VHF Frequency Range 30-223MHZ Packaging and delive...
FM AM (高中频部分分开,仅低频部分共用的FM/AM方框图)二、重要指标定义、标准及具体测试方法 1、FREQUENCY RANGE频率覆盖范围(高端、低端)标准:LENOXX,LIMIT:88MHZ~108KHZ,NORMAL:87.5KHZ~108.5MHZ,允许宽一些(1KHZ)测试条件:音量 标准输出(失真最小调谐,EQ置中间) RF信号强度→60dB,调制频率:1KHZ,频偏:+22.5...
Band 3 Band(FM/AM/SW) Material ABS Plastic Weight 230G Size 120*79*23mm Battery BL5C 1000mAH lithium battery AM Frequency Range 522-1710KHZ FM Frequency Range 64-108MHZ SW Frequency Range 4.75-21.85MHZ Logo OEM Logo Printing Package Color box Packaging and delivery Selling Units: Single it...
全国fm无线广播电台频率表_全国网络广播全国主要城市的fm(The FM wireless radio frequency meter _ national network broadcasting the main city of FM) The radio is only AM band single band radio, both AM and FM band which is multi band radio in radio or radio recorders, I believe we are ...
I am trying to find the source that specifies what the FM Broadcast Band frequency range and channel separation is required to be, pretty much for the entire world. I have had only two responses, both were "I think" or "pretty sure". I ...