Giga-tronics GT 9000, Руководство по эксплуатации и техническому обслуживанию

Страница: 42 / 238

2.2.6 Pulse Modulation
External modulation signals are applied to the PM IN connector, which is duplicated on the
front and rear panels.
The Pulse Modulation function has a number of programmable modes and parameters (see
Figure 2-7).
When the [PM] key in the Modulation field is pressed, the Entry Menu displays the last mode,
whether PM is on or off, and the last parameter with its value.
The [ON] and [OFF] keys in the Function field turn the modulation on and off.
For some functions, it is necessary to select sub-functions as well. For example, the PM
function requires you to specify such parameters as rate, width, and delay. Sub-functions are
selected by means of the [MODE] and [SCROLL] keys in the Functions field.
Use the [MODE] key to change the mode to any of the selections below:
INT Internal
EXT + PULS External pulse positive true
EXT - PULS External pulse negative true
PM + TRIG External rising edge trigger
PM - TRIG External falling edge trigger
Use the [SCROLL] key to select the mode parameters:
RATE Pulse rate
WDTH Pulse width
DELY Pulse delay
Figure 2-7. Pulse Modulation
Model GT 9000 Microwave Signal Generator
2-10
Manual No. 120AM00250, Rev C, September 1998