Chapter 9 47
BBIQ Input Frequency Response (Option BBA only)
Procedure
Procedure
1. On the X-Series analyzer, press Mode, IQ Analyzer (Basic). Press Mode
Preset.
2. Press Input/Output, I/Q (to change to I/Q inputs), I/Q (to bring up the I/Q
input menu), I/Q Cable Calibrate. Follow the instructions on screen. Use
the short BNC cable listed above to perform the calibration. This process
has several steps and will take about 3 minutes to perform.
3. Press I/Q Path, I+jQ, I Setup, Differential (On). Press Return, Q Setup, Q
Same as I (Yes).
4. Preset the RF Signal Generator and set the controls as follows:
Frequency 250 kHz
Amplitude –10 dBm
RF On
NOTE Once the RF Signal Generator’s Amplitude is set, do not change the RF Signal
Generator’s Amplitude setting during the rest of this procedure.
5. Connect the longer BNC cable between the RF Signal Generator’s RF
OUTPUT and the I input of the X-Series analyzer, see Figure 9-1
6. Connect the 50 Ohm termination to the I input of the X-Series analyzer,
see Figure 9-1
7. Press Mode Preset on the X-Series analyzer. Press System, Show,
System. Note if either of the options listed below are present:
N9030A-B25
N9030A-S40
N9030A-B40
8. If none of the options listed in step 7 are present, the maximum IQ
bandwidth is 10 MHz
9. If N9030A-B25 is present, but N9030A-S40 and N9030A-B40 are not
present, the maximum IQ bandwidth is 25 MHz
10.If either N9030A-S40 or N9030A-B40 is present, the maximum IQ
bandwidth is 40 MHz.
11.Press FREQ on the X-Series analyzer and set the Center Freq equal to one
half the maximum IQ bandwidth determined above. For example, if the
maximum IQ bandwidth is 40 MHz, set the Center Freq to 20 MHz.
12.Press SPAN on the X-Series analyzer and set the Span equal to the
maximum IQ bandwidth determined above.
13.Press BW on the X-Series analyzer and set the Res BW to 100 kHz.
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