92 Chapter 12
Monitor Spectrum Measurements
Measurement Procedure
Measurement Procedure
Step 1. Press Mode, TD-SCDMA with HSPA/8PSK to enable the TD-SCDMA mode
measurements.
Step 2. Press
Mode Preset to preset the analyzer.
Step 3. Press
Input/Output, External Gain, BTS and enter the number and −dB according
to the external attenuator connected to the analyzer.
Step 4. Press
Mode Setup, Radio, Device to toggle the device to BTS.
Step 5. Press Meas, Monitor Spectrum to initiate the Monitor Spectrum measurement.
Step 6. Press
Sweep/Control, Gate and toggle the Gate to On. Press More, Gate Source
and select the desired gate source
External 1.
If no measurement is performed and only a symbol of yellow ‘*’ displays on the
top right of the screen, you need to check the gate settings. You need the correct
gate signal to make the Monitor Spectrum measurement.
Step 7. Press
FREQ Channel, 2, GHz to set the center frequency to 2 GHz.
Step 8. Press
SPAN X Scale, enter a numerical span using the front-panel keypad, and
select a units key, such as
MHz.
NOTE A display with a Spectrum window appears when you activate a Spectrum
measurement. Changes to the
FREQ, Span, or AMPTD settings will affect only the
active window.
Step 9. Press
Meas Setup to check the keys available to change the measurement
parameters from the default condition.
Step 10. Press
Trace/Detector, Select Trace and select the trace(s) desired for display, then
toggle
Display to Show.
For more details about changing measurement parameters, see N9079A
TD-SCDMA with HSPA/8PSK User’s and Programmer’s Reference.
If you have a problem, and get an error message, see the “Instrument Messages
Guide”.
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