JDS Uniphase CellAdvisor JD780A Series, User Manual

Page: 125 / 592

JD780A Series Analyzers
Using GSM/GPRS/EDGE Signal Analyzer
125
Selecting measurement mode
Procedure
1.
Press the MODE hard key.
2.
Press the Signal Analyzer soft key.
3.
Press the GSM soft key. The Spectrum mode is set by default.
4.
Press the MEASURE hot key, and then select the measurement mode option from the following
choices:
–
Spectrum
–
RF Analysis > Channel Power, Occupied BW, Spectrum Emission Mask,
Output RF Spectrum, or Spurious Emissions
–
Power vs Time > Power vs Time (Slot) or Power vs Time (Frame)
–
Constellation
–
Auto Measure
–
OTA > Channel Scanner, Frequency Scanner, Multipath Profile, or
Modulation Analyzer
Configuring test parameters
Setting frequency
You can set the frequency with either frequency or channel number. If a frequency to be set matches
to the frequency corresponding to the selected channel standard, the instrument calculates its channel
number and updates the screen with it automatically.
Procedure
To set the center frequency:
1.
Press the FREQ/DIST hard key.
2.
Toggle the Unit soft key and select Freq .
3.
Press the Center Frequency soft key.
4.
Enter a value by using the numeric keys. You can also use the rotary knob.
5.
Select the unit: GHz , MHz , kHz , or Hz .
6.
Optional . To define the amount of frequency increment for the rotary knob, complete the following
steps:
a. Press the Frequency Step soft key.
b. Enter a value by using the numeric keys. You can also use the rotary knob.
c. Press the unit: GHz , MHz , kHz , or Hz .
To set the channel number:
1.
Press the FREQ/DIST hard key.
2.
Toggle the Unit soft key and select Channel .
3.
To select the standard channel, complete the following steps:
a. Press the Channel Std soft key. The standard channel window appears.
See
“Appendix C – Band, frequency & channel standard” on page 571 for more information.