24 Chapter 3
ACP 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, ACP to initiate the Adjacent Channel Power 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 ACP measurement.
Step 7. Press
FREQ Channel, 2, GHz to set the center frequency to 2 GHz.
Or, you can also manually set the reference frequency by pressing
Meas
Setup
, Carrier Setup, Ref Carrier and enter the carrier number to be
referenced, and pressing
Ref Car Freq and enter the carrier frequency.
NOTE When the number of carriers (Carriers) is set to 1, the Ref Carrier is
automatically grayed out and set to 1.
Step 8. Press
Meas Setup to check the keys available to change the
measurement parameters from the default condition.
•Press
Carrier Setup, Carriers and enter the number of carriers.
•Press
Config Carriers to adjust the parameter settings for each
carrier, or to couple other carriers to Carrier 1 when
Carriers is set to
greater than 1.
Step 9. Press
Meas Setup, Carrier Result and enter the carrier number to display
and highlight the desired carrier power result in the text window.
NOTE When Carriers is set to 1, the Carrier Result is grayed out.
Step 10. Press
Offset/Limits to adjust the adjacent channel offset and test limits
parameters.
For more information 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
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