Интересует перевод термина impaired . Тематика - генератор опорных сигналов. Контекст следующий: The frequency of the internal reference oscillator can be impaired by means of the EXT TUNE input . (Частота внутреннего генератора опорных сигналов может быть искажена (???) при использовании входного разъема EXT TUNE )

Не могу подобрать корректную формулировку.

Всем спасибо за ответы!

The frequency of the internal reference oscillator can be impaired by means of the EXT TUNE input (AUX I/Q connector at rear of instrument) (Frequency Adjustment; see data sheet for technical information).

External impairment is possible in both Adjustment State states (On or Off).

External tuning can be used for EFC (Electronic Frequency Control), e.g. in phase noise measurement systems. The resulting frequency variation is in the range between 4E10-9/Volt to 30E10-9/Volt (see data sheet). It depends on the installed options and is typ. 20 Hz/Volt for an RF output frequency of 1 GHz with option R&S SMA-B22, FM/PhiM modulation with low phase noise. The maximum bandwidth for the EXT TUNE input is approx. 50 Hz. The maximum bandwidth of an external PLL (Phase Locked Loop) used in a phase noise measurement system has to be set smaller than the bandwidth of the EXT TUNE input. If a higher bandwidth is required, the use of external FM modulation (DC coupling) with low noise mode is recommended. FM-DC mode yields a fixed tuning sensitivity which is independent from the set RF output frequency and which is equal to the set FM deviation.

In the external reference mode an external signal with selectable frequency and defined level must be input at the REF IN connector . This signal is output at the REF OUT connector. The EXT REF status message appears in the display header.

Oo, дело в том, что это вход (EXT TUNE input), непонятно, в связи с чем может происходить влияние.

изменяться ... регулироваться ... возможно уменьшаться (impairment ?)

Всем большое спасибо за помощь!

The diagram is displayed in a window with two separate coordinate systems. The coordinate
systems have identical X and Y axes. The time (in number of symbols, chips or
samples depending on the signal) is plotted on the X axes, and the amplitude scaled to
the peak envelope power (PEP) is plotted on the Y axes (minimum scaled amplitude =
-1; maximum scaled amplitude = +1). The recording depth is 1 kSamples.
This signal is picked off at the output of the baseband main module ("Impairment" function
block), i.e. contained in the displayed signal is:
● impairment of the signal as defined by the user and the addition of noise.
● Fading of the signal as defined by the user
● an added external (Baseband Input)
● an added internal signal (from the second path).

4.7.1.1 Impairment Settings Menu
To access the "Impairment Settings" menu for setting the digital I/Q impairments, select
"AWGN/IMP > Configure > I/Q Impairements" or use the MENU key under "AWGN/
IMP".
I/Q impairment is activated and set in the "I/Q Impairments" section.

This module also offers digital I/Q impairment functions. The I/Q signal can be deliberately
corrupted, e.g. for testing the receiver quality.

Table 1-2: Pin assignment of the AUX I/O Connector connector
Pin .....Signal ...............Description
46 ......EXT TUNE ......Tuning input for the internal reference frequency.

http://www.rohde-schwarz.es/file_3813/SMU200A_Operating.pdf

deliberately corrupted ... impaired ... больше похоже на "намеренно ухудшена" ...

...впрочем решайте сами - вам ответ держать ... хорошо бы спросить технаря, пусть даже он английског не знает совсем, но разбирается в генераторах ... или рунет перешерстить на эту тему ...

This module also offers digital I/Q impairment functions. The I/Q signal can be deliberately corrupted , e.g. for testing the receiver quality.
The frequency of the internal reference oscillator can be impaired by means of the EXT TUNE input

RF Reference Frequency - Reference Oscillator
In the internal reference mode the internal reference signal is available at the REF OUT connector (rear of instrument). The frequency of the internal reference signal is fixed to 10 MHz. The frequency of the internal reference oscillator can be varied by means of the EXT TUNE input at the rear of the instrument (Electronic tuning from input EXT TUNE, see data sheet for technical information).
External impairment is possible in both Adjustment State states (On or Off).
External tuning can be used for EFC (Electronic Frequency Control), e.g. in phase noise measurement systems. The resulting frequency variation is in the range between 4E10-9/Volt to 30E10-9/Volt (see data sheet). It depends on the installed options and is typ. 20 Hz/Volt for an RF output frequency of 1 GHz with option R&S SMA-B22, FM/PhiM modulation with low phase noise.

Почему - не имею других объяснений, кроме того, которое не нравится 123.