Hameg HM303-6, Руководство пользователя

Страница: 21 / 24

21 Subject to change without notice
Element Function
DUAL Button released:
one channel only.
(pushbutton Button depressed: channel I
switch) and channel II in alternating
mode.
CHOP. DUAL and ADD buttons depressed:
CH I and CH II in chopped mode.
ADD ADD depressed only:
(pushbutton switch) algebr. addition.
In combination with INV.:
difference.
VOLTS/DIV. Channel II input attenuator.
(12 position Selects Y input sensitivity
rotary switch) in mV/div. or V/div.
in 1-2-5 sequence.
VAR. GAIN Fine adjustment of Y amplitude
(knob) CH II. Increases attenuation
factor min. by 2.5 (left hand stop).
For amplitude measurement
must be in CAL. position (right
hand stop).
TRIG. MODE Trigger selector:
(switch) AC : 10Hz-100MHz.
AC-DC-LF-TV DC : DC-100MHz.
LF : DC-1.5kHz.
TV: Triggering for frame and line.
AT/NM Button released = autom. trig.
(pushbutton trace visible without input signal.
switch) Button depressed = normal trig.
with LEVEL
adjustment.
~
AT/NM and ALT pushbuttons
depressed:
Internal line triggering in combi-
nation with normal triggering.
ALT Triggering alternates between
(pushbutton switch) CH I and CH II in alternating
DUAL Channel mode only.
HOLD OFF Controls holdoff-time
(knob) between sweeps.
Normal position = full ccw.
TIME/DIV . Selects time coefficients
(rotary switch) (speeds) of time base,
from 0.2s/div. to 0.1µs/div.
Variable Variable adjustment of time base.
time base control Decreases time deflection speed
(center knob) at least 2.5 fold.
For time measurements
turn to right hand stop.
Element Function
XY Selects X-Y operation,
(pushbutton switch) stops sweep.
X signal via CH I.
Attention!
Phosphor burn-in without signal.
TRIG. EXT. Button released = internal trig.
(pushbutton switch) Button depressed = external
triggering, trigger signal via TRIG.
EXT. BNC socket.
INPUT CH I Channel I signal input and input
(BNC socket) for horizontal deflection in X-Y
mode.
Input impedance 1M
Ω
II 20pF.
AC-DC Selects input coupling of CH I
(pushbutton switch) vertical amplifier.
DC = direct coupling
AC = coupling via capacitor.
GD GD = signal disconnected
(pushbutton switch) from input, Y amplifier grounded.
Connector for reference potential
(4mm socket) (galvanically connected to earth).
INPUT CH II CH II signal input.
(BNC socket) Input impedance 1M
Ω
II 20pF.
AC-DC Selects input coupling of the CH II
(pushbutton switch) vertical amplifier. Specs see (29).
GD GD = signal disconnected
(pushbutton switch) from input, Y amplifier grounded.
INV. Inversion of CH II display.
(pushbutton switch) In combination with ADD button
= difference CH I, CH II.
TRIG. EXT. Input for external trigger signal.
(BNC socket)
(Pushbutton TRIG. EXT. depressed.)
COMP. TESTER Switch to convert oscilloscope
(pushbutton switch) to component tester mode.
Release X-MAG. X10 pushbutton.
COMP. TESTER Connectors for test leads
(4mm sockets) of the Component tester.
0.2Vpp Calibrator square wave output
(test socket) 0,2V
pp
.
CALIBRATOR
1kHz/1MHz
Selects calibrator frequency.
(pushbutton switch) Button released: approx. 1kHz,
Button depressed: approx. 1MHz.
Front Panel Elements HM 303-
6
(Brief Description - Front View)