Hameg HM 407A Скачать руководство пользователя страница 3

3

Subject to change without notice

Accessories supplied: Line Cord, Operators Manual, 2 Probes1:1/ 10:1

Screen photo of stored  sinewave signals.

    Screen shot of measurement  software.

The worldwide success of

 HAMEG

´s

 HM205 

and

 HM305 

has led to the

introduction of the new microprocessor controlled

 HM407 

Analog/Digital

oscilloscope. This instrument offers much more performance and specifications
over its predecessores. The

 HM407 

incorporates a

 microprocessor-based 

system

that extensively automates operation. The majority of signals can be displayed by
simply pressing the “Autoset“ button. A

 “Save/Recall“ 

function is available for

storing frequently used setup parameters.

The increased maximum sampling rate of

 100MS/s 

now allows to capture a

10MHz 

signal in “Single“ mode with

 10 samples 

(dots) per period. The

 automatic

Dot-Join 

function provides linear connections between the captured points,

ensuring that all digitized signals are displayed without gaps. New features are the

two reference memories

, allowing their contents to be compared with the live

signal at any time. Cursors can be activated for waveform measurements. All
important parameter settings are displayed on the CRT screen. The

 built-in RS232-

Interface 

enables remote control operation and signal processing via a PC.

Unique in its price range is also the analog section of the

 HM407. 

The increased

bandwidth of

 40MHz 

(-3dB) allows the stable display of signals up to 

100MHz

. As

always, the

 Component Tester 

with one-button control is a standard feature in

the

 HM407

. This is also true for the switchable 

1kHz/1MHz Calibrator 

which

permits you to check the transient characteristics from probe tip to the screen at
any time.

All in all, the new

 HM407 

presents itself as a practical hands-on oscilloscope for

today’s progressive measurement  requirements offering a price/performance ra-
tio that sets new standards world-wide.

Specifications

Vertical Deflection

Operating modes:

 Channel I or CH II separate,

Channel I and II: alternate or chopped
(Chopper Frequency approx. 0.5MHz)

Sum

 or 

Difference

 from Channel I and ± Ch. II,

XY-Mode:

 via CH I (X) and CH II (Y).

Frequency range:

 2x DC to 40MHz (

3dB).

Risetime: <8.75ns. Overshoot: 

1%.

Deflection coefficient:

 14 calibrated positions

variable 2.5:1 to min. 

50V/div

.

1mV/div 

and 

2mV/div

: ±5% (0 to 10MHz (-3dB))

5mV/div

 to 

20V/div

: ±3% (1-2-5sequence).

Input impedance:

 1M

 II 15pF.

Input coupling: DC - AC - GD (Ground)
Input voltage: max. 400V (DC + peak AC).

Triggering

Automatic

(peak to  peak):

≤≤≤≤≤

20Hz-100MHz

(

0.5div),

Normal: 

DC-100MHz

, LED for trigger indication.

Slope:

 positive or negative.

Sources:

 CH I or II, line, ext.

CH I alternate CH II 

(≤

 0.8div.)

Coupling:

 AC

 (

10Hz  - 100MHz), 

DC 

(0 - 100MHz),

HF

 (50kHz - 100MHz), 

LF

 (0 - 

1.5kHz).

Triggering ext.:

 

0.3V

pp

 from DC to 100MHz

Active TV-Sync-Separator

 (field & line, pos, neg.)

2nd triggering (Del. Trig.):

 normal with level

control DC to 100 MHz.

Horizontal Deflection

Time coefficients:

 1-2-5 sequence, Accuracy ±3%

Analog: 

22 cal. positions  from 

0.5

s - 

50

ns/div.

Digital:

 25 cal. positions from 

100

s - 

1

µs/div.

Variable (analog) 2.5:1 up to 1.25s/div.

X-MAG. x10:

 analog to 

10

ns/div., dig.

 

to

 0.1

µs/div ±5%.

Delay:

 

120

ms - 

200

ns, variable,

Hold-off time (analog):

 variable to approx. 10:1.

Bandwidth X-amplifier (analog)

: 0-3MHz (

3dB).

Input X-amplifier via Channel II, Sensitivity see Channel II.

X-Y

-phase shift : <3° below 120kHz.

Digital Storage

Operating modes:

 Refresh, Roll, Single, XY,

Envelope, Average (2 to 512 waveforms).

Automatic Dot Join

 function

Sample Rate:

 max.

 100MS/s

  (8 bit)

Refresh rate:

 max. 180/s

Record length:

 2048 x 8 bit per channel.

Reference memory

Reference memory

Reference memory

Reference memory

Reference memory: 2 x 2k x 8bit (EEPROM).

Resolution

: Y:

 25 points/div

, X:

 200 points/div.

Pre-/Posttrigger

: 25, 50, 75, 100, -25, -50, -75%.

Operation / Control

Manual (

front panel switches);

Auto Set 

(automatic parameter selection).

Save / Recall 

of

 9 

user-defined parameter settings

RS232 interface 

for remote control via a PC.

Remote control (Option)

 HZ68

.

Multifunction- Interface 

HO79-6(Option): RS232,

IEEE-488, Centronics (Postscript, HPGL, PCL, EPSON).

Readout:

 Display of parameter settings.

Cursor measurement

 of 

V, 

t or 

1/t (frequency),

separate or in tracking mode.

Component Tester

Test voltage:

 approx. 7V

rms

  (open circuit).

Test current:

 max. 7mA

rms

 (short circuit).

Test frequency:

 approx.50Hz

One test lead is grounded (Safety Earth).

General Information

CRT:

 D14-364GY/123 or ER151-GH/-,rectangular

screen (8x10cm) internal graticule

Acceleration voltage:

 approx 2000V

Trace rotation:

 adjustable on front panel

Calibrator:

 square-wave generator (t

r

 <4ns)

1kHz/1MHz;

 

Output: 0.2V ±1%.

Analog Intensitymodulation

, max. +5V (TTL).

Line voltage:

 100-240V AC ±10%, 50/60Hz

Power consumption:

 approx. 42 Watt at 50Hz.

Min./Max. ambient temperature: 0°C...+40°C

Protective system:

 Safety class I (IEC1010-1)

Weight: approx. 5.6kg, color: techno-brown
Cabinet: W 285, H 125, D 380 mm

     3/98

Auto-Set, Save/Recall, Readout/Cursor, RS232 Interface

Analog: 2 x DC-40MHz, max. 1mV/div, Timebase 0.5s/div - 10ns/div

Triggering DC - 100MHz, Component Tester, 1MHz Calibrator

Digital: Max. Sampling Rate 100MS/s, Timebase 100s/div - 0.1µs/div

Storage 2 x 2048 x 8 bit, Reference Memory, Post/Pre-Trigger
Storage Modes: Refresh, Single, Roll, Average and Envelope

40MHz Analog-/Digital-Scope HM407

Содержание HM 407A

Страница 1: ...in analog mode 29 Auto Set 31 Save Recall 31 Component Tester analog mode 31 General 31 Using the Component Tester 32 Test Procedure 32 Test Pattern Displays 32 Testing Resistors 32 Testing Capacitors...

Страница 2: ...mity test made by HAMEG is based on the actual generic and product standards In cases where different limit values are applicable HAMEG applies the severer standard For emission the limits for residen...

Страница 3: ...100MHz 0 5div Normal DC 100MHz LED for trigger indication Slope positive or negative Sources CH I or II line ext CH I alternate CH II 0 8div Coupling AC 10Hz 100MHz DC 0 100MHz HF 50kHz 100MHz LF 0 1...

Страница 4: ...protective earth contact The protective action must not be negated by the use of an extension cord without a protective conductor Themains lineplugmustbeinsertedbeforeconnections are made to measuring...

Страница 5: ...is stated for possible queries this helps towards speeding up the processing of guarantee claims Maintenance Various important properties of the oscilloscope should be carefully checked at certain int...

Страница 6: ...he readout with the symbol for DC and the symbol for AC coupling Amplitude Measurements In general electrical engineering alternating voltage data normally refers to effective values rms root mean squ...

Страница 7: ...ore the measurement It can lie below or above the horizon tal central line according to whether positive and or negative deviations from the ground potential are to be measured Total value of input vo...

Страница 8: ...has little meaning For amplifiers with approximately constant group delay therefore good pulse transmission performance the following numerical relationship between rise time tr in ns and bandwidth B...

Страница 9: ...tective conductor connections caused by external equipment connected to the mains line e g signal generators with interference protection capacitors Controls and readout The following description assu...

Страница 10: ...a pre or post trigger value PT is not indicated by the readout Pressing and holding the STOR ON button switches over to the digital mode but without changing the channel operating mode CH I CH II DUAL...

Страница 11: ...and back to PT0 The values refer to the X axis graticule of the screen display 10 1div The following description assumes that the X magnifier x10 is inactive and the signal display starts on the left...

Страница 12: ...V In this case also several signal acquisition scans are required hence it is similar to Refresh operation The signal is averaged over the several acquisitions so that amplitude variations e g noise a...

Страница 13: ...r pretrigger and post trigger settings the signal acquisition is not complete when the trigger occurs and will only be terminated later After termination the RES LED extinguishes but the signal displa...

Страница 14: ...nob In ADD addition mode both Y POS I and Y POS II control knobs are active If the instrument is set to analog XY mode this control knob is inactive and the X POS knob must be used for a horizontal po...

Страница 15: ...trigger point setting voltage The trigger unit starts the time base when the edge of a trigger signal crosses the trigger point In most Yt modes the trigger point is displayed in the readout by the s...

Страница 16: ...nged All controls related to both channels are active if the inputs 31 and 35 are not set to GD 33 37 Whether alternated or chopped channel switching is present depends on the actual time base setting...

Страница 17: ...ing in DUAL mode Under these conditions both TRIG CH I and CH II LEDs are lit As alternate triggering requires alternate channel operation alternate channel switching is set automatically A change of...

Страница 18: ...of the trace can be set with the DEL POS control in the time base modes SEA SEARCH or DEL DELAY See SEA DEL ON OFF 29 STORAGE MODE ONLY The DEL POS control and the HO LED are disabled since in this m...

Страница 19: ...eviously active settings Automatic normal triggering 15 trigger LEVEL 17 trigger slope 15 and trigger coupling 26 will be stored The instrument will be automatically switched to normal triggering NM a...

Страница 20: ...as an earth ground symbol instead of the deflection coefficient and the AC or DC symbol The GD setting disables the input signal the AC DC 36 pushbutton and the VOLTS DIV 24 knob In automatic trigger...

Страница 21: ...In this mode two signals are normally applied causing an X and a Y deflection The deflection coefficient selected for each channel may be different thus as in DUAL mode the V cursor measurement requi...

Страница 22: ...ent the cursor moves fast 44 CAL Pushbutton and concentric socket A squarewave signal of 0 2Vpp 1 is available from the socket for probe adjustment purposes The signal frequency depends on the pushbut...

Страница 23: ...eady for use If the AUTO SET function was not used and only a spot appears CAUTION CRT phosphor can be damaged reduce the intensity immediately and check that the XY mode is not selected XY not displa...

Страница 24: ...displayed on the CRT screen should have the same value as during the 1kHz adjustment Probes other than those mentioned above normally have a larger tip diameter and may not fit into the calibrator out...

Страница 25: ...n the result The following must be noted here Becauseoftheperiodicnatureofthetrigonometricfunctions the calculation should be limited to angles 90 However here is the advantage of the method Due to ph...

Страница 26: ...g signal AC voltage are displayable in Yt mode In this mode the signal voltage deflects the beam in vertical direction Y while the time base generator moves the beam from the left to the right of the...

Страница 27: ...e previous slope setting for the undelayed time base trigger is stored and still active For further information please note Controls and readout The time base generator can be triggered by a rising or...

Страница 28: ...lit 26 The trigger point symbol is inactive in line mains trigger mode as there is no direct amplitude relationship between the trigger voltage and the signal voltage A voltage originating from mains...

Страница 29: ...sweep periods approx up to the ratio 10 1 Pulses or other signal waveforms appearing during this off period cannot trigger the time base Particularly with burst signals or aperiodic pulse trains of t...

Страница 30: ...tion coefficient must be increased with TIME DIV knob A larger deflection coefficient than in the SEARCH mode cannot be set Example The SEARCH setting selected in figure 2 is 5ms cm The display in DEL...

Страница 31: ...veral frequencies e g video signals are present AUTO SET sets the instrument automatically to the following operating conditions The input coupling is not affected while AC or DC is used but if GD was...

Страница 32: ...e will tend towards the horizontal axis and with low values the slope will move towards the vertical axis Values of resistance from 20 to 4 7k can be approximately evaluated The determination of actua...

Страница 33: ...n circuit tests are possible in many cases However they are not well defined This is caused by a shunt connection of real or complex impedances especially if they are of relatively low impedance at 50...

Страница 34: ...rizontal center graticule line by using the Y POS control Then the trigger point symbol may be set 2 division above the 0 Volt position using the LEVEL control If the deflection coefficient is set to...

Страница 35: ...commended to switch on the instrument for about 20 minutes prior to the commencement of any check Cathode Ray Tube Brightness and Focus Linearity Raster Distortion Normally the CRT of the instrument h...

Страница 36: ...regular intervals the deflection coefficients on all positions of the input attenuators and readjust them as necessary A compensated 2 1 series attenuator is also necessary and this must be matched t...

Страница 37: ...For precise determination set the peak of the first marker or cycle peak exactly behind the first vertical graticule line using the X POS control Deviation tendencies can be noted after some of the m...

Страница 38: ...ariable resistor 100k located on the CRT PCB is used for this adjustment procedure It may only be touched by a properlyinsulatingscrewdriver Caution Highvoltage Correct adjustment is achieved when the...

Страница 39: ...a high level reference potential is not permitted and endangers operator oscilloscope interface and peripheral devices In case of disregard of the safety warnings contained in this manual HAMEG refuse...

Страница 40: ...40 Subject to change without notice Front Panel HM407...

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