2-4
Operation
Front-Panel Features
Front-Panel Features Figure2-2. Agilent83491/2/3A front panels
SELECT key Pressing this key changes the modulation ra te of the input signal. The recov-
ered and retimed clock trigger is sent to the mainframe. The Trigger On Data
selection is a bypass mode where the data s tream directly triggers the main-
frame. Refer to “Block Diagrams” on page 2-7 to view a schematic of the nor-
mal and bypass paths.