Racal Instruments 3155 Spezifikationen PDF herunterladen (Seite 75)

User Manual 3155

3-22 ArbConnection

Note

The normal color of the digital reading is dark blue. If

you modify the reading, the color changes to a lighter

shade of blue, indicating that the 3155 has not been up-

dated yet with the new parameter. Pressing Execute up-

dates the instrument and restores the color of the digital

readout to dark blue, indicating that the displayed value

is the same as the generator setting.

Also note that the digital readout has an autodetect

mechanism for high and low limits. You cannot exceed

the limits when using the dial but you can if you use the

keypad. If you do, the program will not download an ille-

gal parameter and a correction will be requested.

Mode- The Mode sub-group selects the FM operating mode. You

have a choice of continuous, triggered and gated FM. Unlike the

main trigger function, the trigger modes for the FM function operate

in continuous mode. For example, if you place the instrument in trig-

gered FM, the instrument will idle at the carrier frequency and exe-

cute one FM cycle when triggered. Refer to the appropriate section in

this manual to learn more about triggered FM.

Slope – The Slope sub-group let you select edge sensitivity for the

trigger input of the 3155. If you click on Positive, the instrument trig-

gers on the rising edge of the trigger signal. Likewise, if you click on

Negative, the instrument triggers on the falling edge of the trigger

signal.

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Racal Instruments 3155 Spezifikationen Seite 75