Tektronix CMD 80, Руководство пользователя

Страница: 182 / 672

Analog: Module Test
CMD 80 Digital Radiocommunication Tester User Manual
3–115
AUDIO FREQ RESPONSE. Press the AUDIO FREQ RESPONSE softkey to
measure the audio frequency response of the mobile transmitter using the normal
mode (see Figure 3–86).
Figure 3–86: Analog module test tx qual — audio freq response (normal mode)
NOTE
. You must turn off the mobile station’s compressor when performing this
test.
When you press the AUDIO FREQ RESPONSE softkey, the tester displays the
audio frequency response curve plotted between the upper and lower limit lines.
Frequencies of the response curve that are not within the limit lines are indicated
in inverse video at the bottom of the display.
You use the configuration menu to set the upper limit line, lower limit line, and
the number of points sampled. Refer to AUDIO FREQUENCY RESPONSE on
page 3–156.
Refer to AUDIO FREQ RESPONSE on page 3–86 for a detailed description of
the menu items.