HP 3720A User Manual

Section I
11.
12.
DATA:
lever switch. In positions 1 or 2 displays
contents of respective store on CRT. In extreme right-
hand position transfers control to SPECTRUM switch.
21. HORIZONTAL: rotary switch. Selects function to be
presented on horizontal axis of CRT. Used together,
controls
20 and 21 enable the user to select the
presentation format of the display.
WINDOW: lever switch. ON position - applies a
triangular window to input data.
OFF position -
natural window occurs.
22.
23.
CALIBRATION lever switch. Allows external X-Y
Recorder plot size to be set.
13. SPECTRUM: lever switch. Controls choice of store
contents to
be transformed.
START: pushbutton. Initiates a single sweep of the
pen across the X-Y Recorder chart.
14. REAL/COMPLEX: lever switch.
REAL
- calculates cosine components only.
COMPLEX
- calculates cosine and sine components.
24.
RECORD:
Lever switch. Controls outputting of trace
on to X-Y Recorder.
25.
HORIZONTAL SHIFT: potentiometer. Moves trace
horizontally on CRT.
15.
16.
GAIN: rotary switch. Selects gain of integrator.
GAIN VERNIER: potentiometer. Provides continuous
gain adjustment between calibrated steps. In CAL,
gain selected by GAIN switch.
OVERLOAD: lamp. Indicates if integrator becomes
overloaded at any time during processing.
26.
27.
CAL:
potentiometer. Adjusts horizontal size of display.
I
HORIZONTAL GAIN: lever switch. Magnifies horiz-
mtal axis of displayed trace by a factor of
2.
17.
PHASE SHIFT: lever switch. Adds 0. +goo, or
-90' phase shift to any display axis representing
phase information.
28.
18. INTERPOLATION:
potentiometer. In the MANUAL
mode fractionally alters each of the
100 frequencies
at which the transform is computed (up to Af max).
In AUTO
10 equally spaced display points are pro-
duced in each frequency interval df.
29.
VERTICAL SHIFT:
potentiometer. Moves trace ver-
tically on CRT screen.
19. MARKER: potentiometer. Puts a marker on any
point of the displayed function.
30. CAL: potentiometer. Adjusts vertical size of display.
31.
VERTICAL GAIN:
lever switch. Provides magnifi-
cation of vertical axis of displayed trace by a factor
of
2.
20.
VERTICAL: rotary switch. Selects function to be
presented on vertical axis of CRT.
3
Figure 1-2 Front panel controls and indicators (continued)
1-3
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HP 3720A Specifications

General

Brand	HP
Model	3720A
Category	Measuring Instruments
Language	English