Festival of Frequency Measurement 1 October 2019

Paul David Parks (Dave) W4VU N36'04".67 W079'31".40 Start time 30SEP20192331 UTC Antenna type: horizontal loop in attic - approximately 20 ft x 20 ft Receiver: HP 3586B 4999.0000 KHz, USB, Noise/Demod on, Range 10 Db, Full Scale Auto mode<br> Carrier LED lit, 10Kohm, 150 pf input, Bandwidth 3100 Hz Frequency reference type: QRP-LABS VFO Sig/Gen GPSDO calibration signal 10.000000 MHz,<br> typically receiving 5-10 satellites Frequency measurement technique: Followed HAMSCI procedures- 1. Set HP3586B to 4999 KHz USB 2. Set fldigi to 4999 Khz in dial window 3. Set fldigi frequency lock on 1000 Hz line on fldigi waterfall 4. Check that CSV file is writing. 5. Do not touch computer till end of event <br>保罗·戴维·帕克斯（戴夫），呼号W4VU，观测站点地理坐标为北纬36°04.67′，西经79°31.40′。起始时间：2019年9月30日23时31分协调世界时（UTC）。天线类型：阁楼内水平环形天线，尺寸约20英尺×20英尺。接收机：HP 3586B型接收机，工作频率设定为4999.0000千赫，采用单边带（USB）模式，噪声解调功能开启，量程为10分贝，处于满量程自动模式；载波指示灯点亮，输入阻抗10千欧，输入电容150皮法，带宽3100赫兹。频率参考源：采用QRP-LABS公司的可变频率振荡器（Variable Frequency Oscillator, VFO）信号发生器，搭载GPS驯服振荡器（GPS Disciplined Oscillator, GPSDO）校准信号，校准频率为10.000000兆赫，通常可同步接收5至10颗卫星信号。频率测量流程遵循HAMSCI规范，具体步骤如下：1. 将HP 3586B调至4999千赫USB模式；2. 在fldigi软件的调谐窗口中将频率设置为4999千赫；3. 在fldigi的瀑布频谱图中，将软件的频率锁定至1000赫兹刻度线；4. 确认逗号分隔值（Comma-Separated Values, CSV）文件正在正常写入；5. 实验结束前请勿触碰计算机。