1-14 QuickStart Guide
Getting Started ESG Family Signal Generators
Setting Up a Digital Modulation in the GSM Format
Turning On the GSM Format and the Modulation
The signal generator is now configured to burst two uplink timeslots with a −5.0 dBm, GMSK
digitally modulated carrier at 891 MHz. Follow these remaining steps to output the framed
data.
1. Press Return twice. This moves the softkey menu up two levels. The first GSM
softkeymenu should be displayed. (The first softkey in this menu
isGSM Off On.)
2. Press the GSM Off On softkey. This toggles theGSM Off On softkey from Off to On. At this
timethe internal baseband generator generates the internal data
patterns that you have configured for timeslots 0 and 7.
Amessage is displayed while this process is taking place. Notice
also that the following display annunciators are turned on:
•GSM indicates that you have enabled the GSM standard.
•I/Q indicates that I/Q modulation is being generated.
•ENVLP indicates that burst is activated for transmitting
framed data.
3. Press RF On/Off.Notice that the display annunciator changes fromRF OFF to
RF ON. The modulated signal is now available at the
RFOUTPUT connector.
qsg.book Page 14 Friday, September 22, 2000 3:13 PM