Transmitter Quality - Tektronix CMD 80 User Manual

CDMA: Manual Test (Signaling)

Transmitter Quality

3–26
NOTE. The ENVIRONMENT region is present only if the Additive White
Gaussian Noise option is installed. This option provides additional noise to more
closely simulate actual operating conditions.
Use this softkey to test the mobile station transmitter quality. Three sets of tests
are performed by default:
Carrier feedthrough and I/Q imbalance
Carrier frequency error and transmit time error
Waveform quality
One additional test can be selected by pressing one of the following softkeys:
Phase Error
Magnitude Error
Error Vector Magnitude
When you press the softkey associated with a particular test, the graphical output
and the first two lines of the numeric results output change to reflect the results
of that test. Figure 3–18 shows a typical display for the PHASE ERROR test.
This measurement is performed at the FULL data rate.
Figure 3–18: Transmitter quality menu
The tester displays "–––" when it is not able to make a valid measurement of the
input signal.
CMD 80 Digital Radiocommunication Tester User Manual