346 Chapter 11
GPS Modulation
Real Time MSGPS
Scenario Files
When you install option 409, a GPS directory is created in the ESG non-volatile memory and two MSGPS
scenario files are loaded into the GPS directory. Additional scenario files are available for Option 409.
(Go to http://www.agilent.com/find/e4438c and click the
Options tab.) After downloading a
scenario file to your PC, you can download the scenario file to the ESG using FTP over a local area network
(LAN) or using SCPI commands over a general purpose interface bus (GPIB) interface.
Downloading Scenario Files Using FTP (LAN)
The following procedure describes how to download scenario files to an ESG using FTP on a PC connected
to your ESG through a LAN:
1. On the PC click
Start > Programs > Accessories > Command Prompt.
2. At the command prompt enter: ftp <IP address> or <hostname>
3. At the user name prompt, press
Enter.
4. At the password prompt, press
Enter. You are now in the signal generator’s user directory.
5. Type cd GPS.
6. Type bin.
7. Type put <scenario_file>.
8. Type quit or bye to end your FTP session.
9. Type exit to end the command prompt session.
Downloading Scenario Files Using SCPI Commands (GPIB)
The following procedure describes how to download scenario files to an ESG using a SCPI command on a
PC connected to your ESG through a GPIB interface:
1. Open your web browser and type in the IP address of your ESG.. The ESG’s Welcome webpage is
displayed.
2. Click
Signal Generator Web Control. Below the graphical representation of the ESG front panel is a field
for entering SCPI commands.
3. Enter the following command in the SCPI command field:
:MEMory:DATA "<GPS:file_name>",<data_block>
where file_name is the name of the destination file in ESG memory and GPS: specifies the destination
directory. Refer to the Programming Guide for a description of the <data_block> parameter.
NOTE Refer to the Programming Guide for more information on downloading files.
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