![background image](http://html2.mh-extra.com/html/racal-instruments/1257/1257_manual_3121580016.webp)
1257 User Manual
ix
List of Figures
Figure 1-1, 1257 Switching System .................................................................................................1-1
Figure 1-2, 1257 Features, Front Panel...........................................................................................1-3
Figure 1-3, 1257
Features, Rear Panel ...........................................................................................1-3
Figure 1-4, Dimensions....................................................................................................................1-4
Figure 1-5, 2U High Remote Unit.....................................................................................................1-5
Figure 1-6, Reverse Rack-Mounted .................................................................................................1-5
Figure 1-7, 5U Front Panel Display..................................................................................................1-6
Figure 1-8, 6U Front Panel Display..................................................................................................1-6
Figure 2-1, Changing Fuse for Main AC Power ...............................................................................2-1
Figure 2-2, Inserting a Drawer .........................................................................................................2-3
Figure 2-3, Activating Main AC Power .............................................................................................2-4
Figure 3-1, Front-Panel Controls .....................................................................................................3-2
Figure 4-1, Connecting the Ethernet Interface.................................................................................4-3
Figure 4-2, Using the GPIB Interface.............................................................................................4-11
Figure 4-3, Using the RS-232 Interface .........................................................................................4-15
Figure 4-4a, Using the 1257 with a Computer ...............................................................................4-16
Figure 4-4b, Using the 1257 with a Modem ...................................................................................4-16
Figure 4-5, HyperTerminal Connection Dialog Box .......................................................................4-25
Figure 4-6, Phone Number Dialog Box ..........................................................................................4-25
Figure 4-7, COM Properties Dialog Box ........................................................................................4-26
Figure 4-8, Main Communications Screen.....................................................................................4-27
Figure 4-9, Properties Dialog Box..................................................................................................4-28