(April 18 2013)

This combination which is 70 ohms on its female connector
and 35 ohms on its male connector seems to put higher requirements
on the connectors than other DUTs.
It was measured 4 times, connectors were carefully cleaned before the last measurement. It seems reasonable to use a weighted average of all measurements with (1/stddev) File IL Stddev dut81.gif 0.1950 0.00169 dut81a.gif 0.1925 0.00120 dut81b.gif 0.1929 0.00158 dut81c.gif 0.1950 0.00082 Weighted average 0.1941 Guess for standard deviation 0.0006Sorry, the dut81c.gif file is lost. Observed signal levels: none DUT81 11.4712 11.2752 11.4692 11.2735 11.4684 11.2744 11.4685 Averages 11.4693 11.2744 Standard deviations of individual measurements 0.00130 0.00085 Insertion loss 0.1950 dB Standard deviation on insertion loss 0.00082 Error limits (3 sigma) +/- 0.0024 dB The above is the third repetition of this measurement. The standard deviation remains high. | |

Observed signal levels: none DUT81 11.4719 11.2799 11.4698 11.2762 11.4692 11.2752 11.4690 Averages 11.4700 11.2771 Standard deviations of individual measurements 0.00133 0.00247 Insertion loss 0.1929 dB Standard deviation on insertion loss 0.00158 Error limits (3 sigma) +/- 0.0047 dB The above is the third repetition of this measurement. The standard deviation remains high. | |

Observed signal levels: none DUT81 11.4686 11.2759 11.4666 11.2731 11.4650 11.2731 11.4660 Averages 11.4666 11.2740 Standard deviations of individual measurements 0.00158 0.00162 Insertion loss 0.1925 dB Standard deviation on insertion loss 0.00120 Error limits (3 sigma) +/- 0.0036 dB This measurement was repeated because the standard deviation in the first measurement was a bit larger than normal. The new measurement also has a bit high standard deviations. | |

Observed signal levels: none DUT81 11.4937 11.2997 11.4944 11.2971 11.4959 11.3027 11.4953 Averages 11.5005 11.2998 Standard deviations of individual measurements 0.00097 0.0028 Insertion loss 0.1950 dB Standard deviation on insertion loss 0.00169 Error limits (3 sigma) +/- 0.0051 dB |