Fluke 5820A, Руководство оператора

Страница: 43 / 272

Feature
Rear Panel Features
3
3-5
Table 3-1. Front Panel Features (cont.)
B Control Display
The Control Display is a multipurpose backlit LCD used for displaying data entries, UUT error
adjustments, softkey labels, and other prompts and messages. When there isn’t enough room
on the Output Display, output frequency displays on the Control Display. Softkey labels identify
the function of the softkey directly below them. Several softkey labels together are called a
menu. The changing menus provide access to many different functions through the five softkeys
plus the PREV MENU key. (See Figure 3-3, Softkey Menu Tree.)
C
l
The OPR (Operate) key places the 5820A in the operate mode. The operate mode is indicated
by “OPR” in the lower left corner of the output display and the lit indicator on the OPR key.
The STBY (Standby) key places the 5820A in the standby mode. Standby mode is indicated by
“SBY” in the lower left corner of the output display. In standby mode, the NORMAL and AUX
output terminals are internally disconnected from the 5820A. The 5820A normally starts up in
the standby mode. The 5820A automatically switches to standby if one of the following occurs:
Pressing the RESET key.
Selecting a voltage at rms value
≥ 33 V when the previous output voltage was less than 33 V.
D
î
The VOLTAGE key lets you select the voltage mode so you can calibrate the voltage gain by
applying a dc or low frequency square wave signal and adjusting its gain to meet the height
specified for different voltage levels, as designated by the graticle line divisions on the
oscilloscope.
E
v
The EDGE key lets you select the edge mode so you can calibrate the edge response for your
oscilloscope by using a square wave signal that has a fast leading edge rise-time.
F
ä
The LEVEL SINE key lets you select the level sine mode so you can use a leveled sine wave,
whose amplitude remains relatively constant over a range of frequencies, to check the
oscilloscope’s bandwidth.
G
w
The MARKER key lets you select the marker mode so you can generate a time marker signal
from the Calibrator and match the time interval to the time divisions on the oscilloscope in order
to calibrate the timing response.
H
m
The
PREV MENU
(Previous Menu) key recalls the previous set of menu choices. Each press of
this key backs up one level of the menu tree until the display indicates the top level menu
selection of the function selected.
I
Softkeys
The functions of the five unlabeled blue softkeys are identified by labels on the Control Display
directly above each key. The functions change during operation so that many different functions
are accessible through these keys. A group of softkey labels is called a menu. A group of
interconnected menus is called a menu tree.