Tektronix RSA306 - Page 44

Performance ver
ification
15. Measure noise for 1 kHz offset:
a. CF = 1000.000950 Hz
b. Span = 1kHz
c. RBW =10 Hz
d. Avg count = 20 (note: If 20 averages does not result in a stable amplitude, more averages can be used.)
e. Marker frequency = 1000.001 MHz
f. After averaging is completed, enter the raw noise amplitude in dBm/Hz in the measurement table. (See Table 14
on page 33.)
g. Calculate a
nd record Phase noise, the difference of CW amplitude in 100 Hz filter and noise measured with the
power marker. (See Table 14.)
16. Record the results in the Test record.
Table 14: P
hase noise at 1 GHz center frequency
Phase noise offset
frequenc
y
RBW
CW amplitude,
dBm
Raw noise,
dBm/Hz
Phase noise
(raw noise – CW
amplitud
e), dBc/Hz
Specifica
tion
1kHz 10Hz
< –85 dBc/Hz
10 kHz 100 Hz
< –84 dBc/Hz
100 kHz 1 kHz
< –90 dBc
/Hz
1MHz 1kHz
< –118 dBc/Hz
33 RSA306 Speci fications and Performance Verification