R3132 Series Spectrum Analyzer Operation Manual
5.2.21 Residual Response
5-88
7.
On the R3132 series, after preset, set controls as follows:
Center Frequency:
2 MHz
Span:
2 MHz
CF Step Size:
1.9 MHz
Reference Level:
-50 dBm
Input Attenuator:
0 dB
RBW:
10 kHz
VBW:
300 Hz
Measurement the residual response on the 1 MHz to 3 GHz for R3132/32N
Measurement the residual response on the 1 MHz to 3.3 GHz for R3162/72/82
Under preamplifier off condition
8.
Press DISPLAY, Disp Line ON/OFF(ON), 1, 0, 0 and MHz(-dBm) to place dis-
play line at 100 dBm position.
9.
Press SINGLE, for single sweep.
The noise level should be at least 3 dB below the display line. If it is not, it will
be necessary to reduce the Span and RBW to reduce the noise level. If the span
is reduced, reduce the CF Step to no more than 95% of the Span.
10. If a residual is suspected, press the SINGLE again.
A residual response will persist, but a noise peak will not. Record the frequency
and amplitude of any responses above the display line.
11. If a response is marginal, verify the response amplitude as follows:
Press SHIFT, RECALL(SAVE), 1, and Hz(ENTER) to save the setting condi-
tion.
Press REPEAT to set continuous sweep mode
Place the marker on the peak of the response in the question.
Press MKR
→
, MKR
→
CF to set marker frequency to center.
Press BW and RBW AUTO/NMN(AUTO) to set RBW auto mode.
Continue to reduce the span until a RBW of 1 kHz is reached.
Press MKR
→
, Peak
→
CF to set peak to center.
Record the frequency and amplitude of any residual response above the display
line.
Press RECALL and Recall to recall the setting condition.
12. Check for residuals up to center frequency 3.29 GHz (for R3132/32N up to 2.99
GHz) using the procedure of step 6 through 9.
To change the center frequency, then press the FREQ and
∆
keys.
