Anritsu MS8608A, Руководство по эксплуатации, Страница: 136 / 338

6-24
Section 6 Performance Tests
(4) Procedure
Step Procedure
1 Press the Preset key.
2 Operate All Cal.
3 Set the MG3633A output to 1000 MHz and 0 dBm.
4 Set the MS8608A/MS8609A as shown below:
Center Freq .................................. 1.000 010 GHz
Span .......................................................... 25 kHz
Reference Level ........................................ 0 dBm
Attenuator ................................................... 10 dB
RBW ......................................................... 300 Hz
VBW .......................................................... 10 Hz
DET MODE ......................................... SAMPLE
5 Press the Peak Search key to search for a peak
point so that the peak point on the signal trace is
included in the zone marker.
6 Press the
→
RLV key to match the peak of the
signal trace to the top line (REF LEVEL) on the
screen.
7
After pressing the Measure key, select C/N Ratio
Measure.
8 Press the Meas On key to start C/N measurement.
9 Set Zone Width of Marker to Spot.
10
Press the Marker key, then turn the rotary knob
to move the zone marker to the right so that the
zone center frequency is 10.0 kHz.
11 Set Reference Level to –10 dBm.
12 Repeat steps 4 to 11 for offset frequency 100 kHz according to the below setup table.
Frequency offset
Setting the MS8608A/MS8609A spectrum analyzer
Measured result
Span RBW VBW Center frequency
10 kHz
100 kHz
1.00001 GHz
1.0001 GHz
25 kHz
250 kHz
300 Hz
3 kHz
10 Hz
100 Hz
CF: 1.000010GHz SPAN : 25kHz
Sideband Noise Measurement