Rohde & Schwarz CMU-Z6, Руководство по эксплуатации, Страница: 15 / 16

CMU-Z6 Operating Instructions
1150.0199.12 5 E-3
The CMU states that the CMU-Z6 must be connected and that Mode B must be selected as
described above.
Press ENTER to continue the modulation correction.
The progress of the correction is monitored in the Status and Progress fields. Once the correction is
terminated, the Test status indication changes to HLT and the CMU is ready to perform an improved
wideband modulation analysis.
Important Note:
A warm-up time of at least 30 minutes is necessary to reach the normal operating temperature
of the CMU; otherwise the correction values might be impaired.
Checking the Corrected Measurement
The accuracy of the corrected modulation measurement can be checked by using a standard QPSK or
WCDMA signal from a signal generator. We propose the following equipment and test setup:
Equipment Properties Appropriate R&S device Stock no. Use
SMIQ03 1084.8004.03 QPSK Signal generator 300 kHz to 3.3 GHz
QPSK / WCDMA
SMIQ03B
with option SMIQ-B47 1125.5555.03 WCDMA
Coax cable N to N, approx. 1 m length RF connection cable 0100.7670.10 RF connection
SMIQ –> CMU
Coax cable
BNC to BNC (50
Ω
),
approx. 1.8 m length
RF connection cable 0100.6945.20 Synchronize CMU to 10 MHz
reference signal from SMIQ