Front Panel Elements - Hameg HM 203-7 Manual

Front Panel Elements HM 203-7
(Brief Description - Front View)
Element
Function Element Function
O
POWER on/off
(pushbutton
+
LED)
Turns scope on and off.
LED indicates operating condition.
@
COMPONENTTESTER
Button depressed: CT in operation,
(pushbutton switch 2-terminal measurement: component
(2)
INTENS.
(knob)
Intensity control for
trace brightness.
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@
Y-POS.I
(knob)
Controls vertical position of
CH. 1 display.
(3)
FOCUS
(knob)
Focus control for
trace sharpness.
@
AC-DC-GD
Selects input coupling of the
CH, 1 Vertical Amplifier.
AC/DC depressed: direct coupling;
AC/DC released: Signal is capacitiveiy
coupled (DC is blocked).
GD depressed: Signal is disconnected,
amplifier input is grounded.
® tr
(pot)
Trace rotation. To align trace with
horizontal graticule line. Compensates
influence of earth's magnetic field.
® X-Y Selects X-Y operation, stops sweep.
(pushDutton switch)
a
signal via ui-i. ii.
Attention! Phosphor burn-in without X signal.
@
INPUT(CH.I)
(BNC-connector)
CH. 1 signal input.
Input impedance 1MQil25pF.
Separate ground jack.
® X-POS.
(knob)
Controls horizontal position of trace.
GD
(4 mm socket)
@ HOLD OFF
(knob)
Controls holdoff-time between sweeps.
Normal position = full ccw.
@
VOLTS/DIV.
(rotary switch)
CH. 1 input attenuator.
Selects input sensitivity in mV/div.
or V/div. in 1 -2-5 sequence.
®
TRIG.
(LED)
LED lights, if sweep is triggered.
I®
VAR. GAIN
(center knob)
Continuously variable gain between
the calibrated settings of the
VOLTS/DIVswitch. Decreases
sensitivity 1
:
2.5. Cal. position: cw.
®
TV SEP.
(lever switch)
TV-Sync-Separator,
OFF = Normal operation.
TV: FI = Line or horizontal frequency.
TV: V = Frame or vertical frequency.
®
YMAG.xS
When depressed, increasing of Y-
©
TRIG. Trigger selector
(pushbutton switch) sensitivity 5 fold (max. 1 mV/cm).
AC-DC-HF-LF-~
(lever switch)
AC:
10 Hz to 10 MHz.
DC:
DC to 10MHz.
HF:
1,5kHz to 40MHz.
LF:
DC to 50 kHz.
~:
Internal line triggering.
@
CH l/ll-TRIG. I/ll
(pushbutton switch)
Button released: CH. 1 only and internal
triggering from CH.I.
Button depressed: CH, II only and
internal trig, from CH. 11.
In DUALand ADD mode: Button
selects internal trigger signal.
@ +/-
(pushbutton switch)
ALT.
(pushbutton switch)
Selects the slope of the trigger signal.
+ =
rising edge; - = falling edge.
Triggering alternates between CH. 1
and CH. 11 (Dual Channel Mode only).
@
DUAL
-
(pushbutton
switch)
OP.
Button released: One channel only.
Button depressed: CH.landCH.il
in alternate mode.
DUAL and ADD buttons depressed:
CH. 1 andCH. II in chopped mode.
®
TIME/DIV.
(rotary switch)
Selects timebase speeds
from0.2ns/div.to0.1 s/div.
(||i
ADD
- ADD button depressed only: Algebraic
® Variable
(center knob)
Timebase variable control. Decreases
timebase sweep speed 1:2.5
Cal. position = full clockwise.
(pushbutton
switch)
addition in combination with
INV. CH. II button.
©
VOLTS/DIV.
(rotary switch)
CH. II input attenuator.
Selects input sensitivity in mV/div.
or V/div. in 1-2-5 sequence.
@
EXT.
(pushbutton switch)
Button released = internal triggering.
Button depressed = external triggering,
trigger signal via TRIG. INP.@.
@
VAR. GAIN
(center knob)
Continuously variable gain for CH. 11.
Specifications like®.
®
TRIG.INP.
(BNC connector)
Input for external trigger signal,
if button ® is depressed.
@
YMAG.xS
When depressed, increasing of Y-
sensitivity 5 fold (max. 1 mV/cm).
Button released = autom. triggering,
trace visible without input signal.
Button depressed = normal triggering
with LEVEL@adjustment,
trace invisible without signal.
@
AT/NORM.
(pushbutton switch)
@ INV.CHII
(pushbutton switch)
Inversion of CH. 11 display.
In combination with ADD button
= algebraic addition.
In X-Y mode inoperative.
@
INPUT CH. II
(BNC-connector)
CH. 11 signal inputand input for
horizontal deflection in X-Y mode.
@
LEVEL
(knob)
To adjust trigger point,
if AT/N0RM. @ button is depressed,
Selects input coupling of the
CH. 11 Vertical Amplifier. (See @).
®
X-MAG.xlO
(pushbutton switch)
10:1 expansion in the X direction.
Max. resolution 20 ns/div.
MU L/U UL/
(pushbutton switches)
(§)
Y-POS.II
(knob)
Controls vertical position of
CH. II display.
In X-Y mode inoperative.
®
CALIBRATOR
0.2 V-2V Calibrator output for probes
(eyelets) 10:1 =
0.2Vpp,
100:1
=2Vpp(nj).
K2 203-7
Subject to change without notice