HP 8568B有2个信号输入，输入1和2之间的电平有差异？

在8568B上有2个信号输入。
对于选项001，你得到一个75欧姆的BNC用于输入1.内部有一个50/75欧姆的MLP来提供阻抗匹配，我认为如果该单元具有提升阻抗的选择，CPU会告知IF变量增益
增益约5.7 dB以补偿MLP损失。
我有一个当前面板校准器将N型输入2设置为-10.0 dBm时，如果校准器（50欧姆？）连接到输入1（75欧姆），是否会有很大差异？
我估计可能是+1.6 dB。
这个显示-6.9 dBm的读数。
其他校准器和75欧姆输入不匹配的情况可以忽略不计或是否有调整（除了前面板Amptd Cal？SteveEdited：S。Reeves于2015年5月1日上午9:03



     以下为原文

  On the 8568B there are 2 signal inputs. For option 001, you get a 75 ohm BNC for Input 1. There is a 50/75 ohm MLP inside to provide impedance matching and I would think the IF variable gain is told by the CPU's if the unit has that option to bump up the gain about 5.7 dB to compensate for the MLP loss.

I have one that when the type N Input 2 is set up with the front panel calibrator to -10.0 dBm, should there be a big difference if the calibrator (50 ohm?) is connected to Input 1 (75 ohm).? I estimate maybe +1.6 dB.

This one shows a reading of -6.9 dBm. Other having a mismatch of the calibrator and 75 ohm input, is this negligible or is there an adjustment for this (other than the front panel Amptd Cal ?

Steve

Edited by: S. Reeves on May 1, 2015 9:03 AM