Hameg hm8021 User Manual

Universal Counter

HM8021-4

Service-Manual

General information regarding the CE marking

Hersteller HAMEG Instruments GmbH KONFORMITÄTSERKLÄRUNG
Manufacturer Industriestraße 6 DECLARATION OF CONFORMITY
Fabricant D-63533 Mainhausen DECLARATION DE CONFORMITE

Die HAMEG Instruments GmbH bescheinigt die Konformität für das Produkt
The HAMEG Instruments GmbH herewith declares conformity of the product
HAMEG Instruments GmbH déclare la conformite du produit

Bezeichnung / Product name / Designation:

Compteur Universel
Typ / Type / Type: HM8021-4
mit / with / avec: HM8001-2
Optionen / Options / Options: –

mit den folgenden Bestimmungen / with applicable regulations / avec les directives
suivantes

EMV Richtlinie 89/336/EWG ergänzt durch 91/263/EWG, 92/31/EWG
EMC Directive 89/336/EEC amended by 91/263/EWG, 92/31/EEC
Directive EMC 89/336/CEE amendée par 91/263/EWG, 92/31/CEE

Niederspannungsrichtlinie 73/23/EWG ergänzt durch 93/68/EWG
Low-Voltage Equipment Directive 73/23/EEC amended by 93/68/EEC
Directive des equipements basse tension 73/23/CEE amendée par 93/68/CEE

Angewendete harmonisierte Normen / Harmonized standards applied / Normes
harmonisées utilisées

Sicherheit / Safety / Sécurité
EN 61010-1:2001 (IEC 61010-1:2001)
Überspannungskategorie / Overvoltage category / Catégorie de surtension: II

Verschmutzungsgrad / Degree of pollution / Degré de pollution: 2
Elektromagnetische Verträglichkeit / Electromagnetic compatibility /
Compatibilité électromagnétique

Universal Zähler / Universal Counter /

EN 61326-1/A1 Störaussendung / Radiation / Emission:
Tabelle / table / tableau 4; Klasse / Class / Classe B.

Störfestigkeit / Immunity / Imunitee: Tabelle / table / tableau A1.

EN 61000-3-2/A14 Oberschwingungsströme / Harmonic current emissions / Émissions
de courant harmonique: Klasse / Class / Classe D.

EN 61000-3-3 Spannungsschwankungen u. Flicker / Voltage fl uctuations and fl icker /
Fluctuations de tension et du fl icker.

Datum /Date /Date

22.07.2004
Unterschrift / Signature /Signatur

G. Hübenett
Produktmanager

General information regarding the CE marking

HAMEG instruments fulfi ll the regulations of the EMC directive. The
conformity 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
residential, commercial and light industry are applied. Regarding the
immunity (susceptibility) the limits for industrial environment have
been used.

The measuring- and data lines of the instrument have much infl uence
on emmission and immunity and therefore on meeting the acceptance
limits. For different applications the lines and/or cables used may
be different. For measurement operation the following hints and
conditions regarding emission and immunity should be observed:

1. Data cables
For the connection between instruments resp. their interfaces and
external devices, (computer, printer etc.) suffi ciently screened cables
must be used. Without a special instruction in the manual for a reduced
cable length, the maximum cable length of a dataline must be less than
3 meters and not be used outside buildings. If an interface has several
connectors only one connector must have a connection to a cable.
Basically interconnections must have a double screening. For IEEE-bus
purposes the double screened cables HZ72S and HZ72L from HAMEG
are suitable.

3. Infl uence on measuring instruments.
Under the presence of strong high frequency electric or magnetic fi elds,
even with careful setup of the measuring equipment an infl uence of
such signals is unavoidable.
This will not cause damage or put the instrument out of operation. Small
deviations of the measuring value (reading) exceeding the instruments
specifi cations may result from such conditions in individual cases.

HAMEG Instruments GmbH

2. Signal cables
Basically test leads for signal interconnection between test point and
instrument should be as short as possible. Without instruction in the
manual for a shorter length, signal lines must be less than 3 meters
and not be used outside buildings.
Signal lines must screened (coaxial cable - RG58/U). A proper ground
connection is required. In combination with signal generators double
screened cables (RG223/U, RG214/U) must be used.

2

Subject to change without notice

Content

Declaration of Conformity 2

General information regarding the CE-marking 2

4¾ Digit P

rogrammable Multimeter HM8021-4 4

Specifi cations 5

Control elements 6

Adjustment 7

Circuit and layout diagrams 8

Subject to change without notice

3

HM8021-4

1.6 GHz Universal Counter
HM8021-4

Frequency range 0 Hz to 1.6 GHz

10 MHz time base with 0.5 ppm stability (TCXO)

Input A:
Input impedance 1 MΩ, maximum sensitivity 20mV

rms

Input C:
Input impedance 50 Ω, maximum sensitivity 30 mV

rms

Time interval resolution up to 10ps

Offset mode over the entire measurement range

Gate input (in combination with HO801)

Mainframe HM8001-2 required for operation

Option HO801

Mainframe HM8001-2

Option HO85, a high-stability
oscillator with a stability
of ± 5x10

-9

per day

4

Subject to change without notice

Specifications

1.6 GHz Universal Counter HM8021-4

Valid at 23 °C after a 30 minute warm-up period

Measurement functions

Frequency A/C, Period A;
Totalize A;
Pulse width :L / L: (averaged);
Totalize A during ext. gate

Input characteristics (Input A)

Frequency range:

0 – 150 MHz: DC-coupled

10 Hz – 150MHz: AC-coupled

Sensitivity: (normal triggering)

DC – 80 MHz 20mV

rms

(sine wave)

80 mV (pulse)

80 MHz – 150MHz 60 mV

rms

(sine wave)

20 Hz – 80MHz (auto trig.) 50 mV

rms

(sine wave)

Minimum pulse width: 5ns
Input noise: 100 μV (typ.)
Coupling: AC or DC (switchable)
Input impedance: 1 MΩ II 40pF
Attenuator: x 1, x 20 (switchable)
Max. input voltage:

0 to 440 Hz: 400 V (DC + AC

peak

)

1 MHz: decreasing to 8V

rms

Input characteristics (Input C)

Frequency range: 100MHz – 1.6 GHz
Sensitivity:

to 1.3 GHz: 30 mV (typ. 20mV)
to 1.6 GHz: 100 mV (typ. 80 mV)

Input impedance: 50 Ω nominal
Coupling: AC
Max. input voltage: 5 V (DC + AC

peak

)

Input characteristics (external gate)

Input impedance: 4.7 kΩ
Max. input voltage: ±30 V
High/low level: › 2V/‹ 0.5V
Min. pulse duration: 50 ns
Min. effective gate time: 150 μs

Frequency measurement (Input A)

LSD: (2.5x10-7s x freq.)/measurement time
Resolution: ±1 or 2 LSD

Period duration measurement

Range: 10000 sec to 66.6 ns
LSD: (2.5 x 10-7s x period)/measurement time
Resolution: ±1 or 2 LSD

Totalize (manual / external gated)

Range: DC to 20 MHz
Min. pulse duration: 25 ns
LSD: ±1 count
Resolution: LSD
Ext. gate error:

in manual mode only 100 ns

Time interval (averaged)

LSD: 100 ns to 10ps
Resolution: 1 or 2 LSD

Offset

Range: covers the entire measurement range

Gate time

(Gate time cannot be less than 1 period.)

Range: 100 ms – 10s in 3 steps
External gate time: min. 150 μs

Timebase

Frequency: 10 MHz clock

10 MHz crystal

Accuracy (between 10° C and 40°C):

±5 x 10

-7

Aging: ±3 ppm/15 years

General information

Display: 8-digit 7-segment LED display with

7.65 mm digit height, sign and exponent

Power consumption: approx. 7 Watt
Operating temperature: +10°C to +40° C
Max. relative humidity: 10 % – 90%

(without condensation), 5 % – 95 % RH

Dimensions (W x H x D): 135 x 68 x 228 mm
Weight: approx. 0.6kg

Accessories supplied: Operator’s Manual
Optional accessories: HZ33/HZ34 BNC Test Cable, HZ24 Attenuators, HZ20

BNC banana adapter, HO85 OCXO, HZ10 Silicone test leads

HM8021-4E/140705/ce · Subject to alterations · © HAMEG Instruments GmbH · ® Registered Trademark · DQS-certified in accordance with DIN EN ISO 9001:2000, Reg.-No.: DE-071040 QM

HAMEG Instruments GmbH · Industriestr. 6 · D-63533 Mainhausen · Tel [phone] · Fax [phone] · www.hameg.com · [e-mail]

A Rohde & Schwarz Company

www.hameg.com

Subject to change without notice

5

Control elemtents

Control elements

OF (LED)

This LED is lit when an over fl ow ocurs. This depends on the se-

lected gate time and on the frequency of the signal applied.

GT (Gate Open; LED)

The gate indicator is lit when the gate is open for measure-

ments. This time equals the preselected gate time and a
synchronization time. The gate cannot be open for a time
smaller than 1 period of a signal.

GATE TIME (Gate time selector; pushbutton + LEDs)

The gate time is selectable in steps of 0.1s, 1s, 10s.

EXT. (LED)
In the gate external mode, the counter will expect an ex ter-

nal control signal, and will not measure until such a signal
is supplied.

DISP. HOLD (pushbutton + LED)

Depressing the DISP. HOLD pushbutton sets the display

time to infi nity and freezes the last measurement result. A
new measurement can be initiated using the reset pushbut­ton. Measuring will restart when Display Hold is switched
off. Display Hold starts and stops counting in the TOTALIZE
function mode.

Function indicators (LEDs)

FUNCTION (pushbuttons)
The § and ¨ pushbuttons select the desired function. The

appropriate LED is lit when a function is selected. The def­ault value when switching power on is FA (Frequency A).

OFFSET (pushbutton + LED)

The displayed value becomes the reference value. (Not

available with the TOTALIZE function).

is activated, depressing RESET shows the reference value
(which is the actual offset). Reset is active as long as the
button is de pressed.

INPUT C (BNC-connector)

Frequency range: 100 MHz to 1.6 GHz
Input impedance: 50 Ω

Attention! Do not apply more than 5 V (DC+AC

peak

) to this

input terminal.

DC (pushbutton)

Selection of AC or DC coupling of the signal input A. The

bandwidth for low frequencies is as low as 10 Hz (3 dB) when
the input is AC coupled. Input C has a fi xed AC coupling.

DC coupling = button depressed

1:20 (pushbutton)

Selection of input signal attenuation. Pressing this button

attenuates the input signal by 26 dB before it is applied to
the input amplifi er.

AUTO (pushbutton)

With Auto Trigger active the counter triggers in the middle

of the input signal. Auto Trigger always uses AC-coupling.
AC = pushbutton depressed.

INPUT A (BNC connector)

Signal input with a sensitivity of 20 mV up to 80 MHz and

60 mV up to 150 MHz. The input is protected against over­voltage up to 400 V (DC+AC

peak

).

Input impedance: 1 MΩ II 40 pF.

TRIGGER (adjusting knob)

Continuously adjustment of trigger level.

TRIGGER (LED)
Trigger indicator. The LED fl ashes when triggering is cor-

rect. The LED lights when the trigger level is above the in­put signal level, it is not activated when the trigger level is
below the input signal level.

RESET (pushbutton + LED)

Stops a measurement and clears the display in normal

measurement mode. When depressing the button in display
hold-mode the counter performs a single measurement
(one shot) on release of the button. When the offset-mode

6

Subject to change without notice

8 digit display (7 segment LEDs, 7.65mm high)

for the measuring result (8 digit max. + exponent)

Hz (LED): Indicates the measurement of a frequency

s (LED): Indicates the measurement of time