Time Electronics 5041 Manuale utente

Time Electronics Ltd

Unit 11 Botany Industrial Estate

Tonbridge, Kent, TN9 1RH

Tel: 01732 355993 Fax: 01732 770312

E-Mail: [email protected]

Web Site: www.TimeElectronics.co.uk

V10.3 16/04/08

5041

Oscilloscope & Timer

Counter Calibrator

Technical Manual

CONTENTS

Chapter 1 - INTRODUCTION.......................................................... 3

Chapter 2 - SPECIFICATION .......................................................... 4

Chapter 3 - SETUP & FRONT PANEL............................................ 5

3.1 Mains Input Voltage

3.2 Communication Settings

3.3 Communication Connections

3.4 GPIB User Commands

3.5 Front Panel

3.6 Output Connections

Chapter 4 - OPERATION ................................................................ 9

4.1 Installing program on PC

4.2 Amplitude Function

4.3 Fast Rise Function (Bandwidth Determination)

4.4 Frequency (Time Base) Function

4.5 Period Function

4.6 2.2 GHz Levelised Sine Function

Chapter 5 - EASYCAL .................................................................... 18

Chapter 6 - FAULT DIAGNOSIS ..................................................... 27

6.1 Mains Power Unit……………………………… 28

Chapter 7 - GUARANTEE & SERVICE FACILITIES ........................ 29

The information contained in this document is subject to change without notice. We make no warranty of any kind

with regard to this material, including, but not limited to, the implied warranties or merchantability and fitness for a

particular purpose. We shall not be liable for errors contained herein or for incidental consequential damages in con-

nection with the furnishing, performance or use of this material.

All trademarks and trade names are recognised.

Windowsis copyright of the Microsoft Corporation.

Page 2

Chapter 1 - INTRODUCTION

5041 OSCILLOSCOPE & TIMER/COUNTER CALIBRATOR

The 5041 is a versatile high accuracy calibrator capable of calibrating a wide range of

oscilloscopes and timer/counters to 2.2GHz. It provides a wide range of calibrated

outputs for amplitude, frequency, period and bandwidth.

The 5041 is compatible with Time Electronics’ well established EasyCal software.

The 5041 follows the modern trend of instrumentation which is PC control based and

has few front panel controls and switches. A virtual front panel is displayed on the PC

screen and communication with the unit is via the RS232 (serial) or GPIB (IEEE) port.

The 5041 is supplied as standard with a Windows based control program that is both

user friendly and simple to use. The program will be supported and updated free of

charge for the life of the instrument.

For a greater precision of bandwidth determination and additionally, a frequency

response analysis function, a 10MHz to 2.2GHz levelised sine wave option is

available. The frequency over this range can be swept manually or under the control of

the manual control program or Time Electronics’ EasyCal software. This enables

precision response analysis of and oscilloscopes input amplifiers (and any other high

frequency amplifier). If read-back of the amplifier’s output is available, either via the

serial link or GPIB, a fully closed loop calibration can be done.

For calibration of oscilloscope current probes an optional external battery powered

adapter is available. This converts the 5041’s amplitude output to current and covers

the range 0.1 – 100 mA pk-pk, 0.2% accuracy, DC or 1kHz.

Enhanced timing performance is optionally available by specifying a rubidium atomic

clock module (9762). This option is required to achieve the timing accuracy required to

calibrate high performance Timer/Counters which need accuracies of 1 part in 10 E-10.

By using a GPS frequency standard it is possible to cross check to International

Standards the accuracy of the Rubidium oscillator.

Page 3

Chapter 2 SPECIFICATIONS

AMPLITUDE CALIBRATION

FREQUENCY CALIBRATION

GENERAL INFORMATION

Power: 100 - 230V AC (+/-7%) 50 or 60Hz

Dimensions: 43cm wide x 25cm deep x 15cm high (17 x 10 x 6 ins ) 7Kg (15 lbs)

ORDERING INFORMATION Order Code

Scope and Timer/Counter Calibrator for use with external PC 5041

EasyCalSoftware 9747

1GHzsweep 9761

Rubidium frequency reference 9762

Current probe calibration adapter 9764

Rack mount kit (standard 19”) 9728

PCIGPIBboard 9743

Output Levels per Div 1mV to 50V in 1,2,5 sequence, 1kHz square wave or DC.

Graticule Divisions X 1, 2, 4, 6, 8. Max output 200V pk-pk into >500kohm/100pF or 2V into 50ohm

Accuracy 1mV-200mV: 0.2%+/-4uV. >300mV: 0.05%. Into 50ohm: 0.25%+/-4uV. TC<20ppm/C

Low Range 0.1Hz to 170kHz (in steps equivalent to 1µs intervals). Output: 1Vpp into 50ohm

High Range 200, 500kHz, 1, 2, 5,10, 20, 50, 100MHz. Output: 400mVpp into 50ohm

Accuracy 10MHz & below: 0.02ppm, <0.1ppm/yr stab. 20/50/100MHz: 5ppm, <10ppm/yr stab

PERIOD CALIBRATION

Low Frequency Mode 6µs to 15s (settable in 1µs steps). Output: 1V pp into 50ohm (2Vpp into open circuit)

High Frequency Mode 10, 20, 50, 100, 200, 500ns, 1, 2, 5µs. Output: 400mVpp into 50ohm

Accuracy 100ns - 15s: 0.02ppm +/- 30ps, <0.1ppm/yr. 10/20/50 ns: +/- 50ps, <10ppm/yr

MARK/SPACE RATIO

Range 0.01% to 99.99% for periods >20ms. For periods <20ms the % mark/space resolution

is determined by a minimum 2us step. Output level: as Frequency and Period

FAST RISE

Fast Rise Time < 300ps. Allows bandwidth checking up to 1 GHz. Output: 400mVpp into 50ohm.

PROGRAMMABLE OPERATION

Interfaces SERIAL (RS232) and GPIB (IEEE-488)

Commands A full command set allows complete control of all functions by an external computer

SOFTWARE

PC Program An easy-to-use program allows full control of the calibrator from an external PC

PC Requirement PC running Windows 98, ME, 2000, or XP. RS232 serial or GPIB port

EasyCal The 5041 is fully compatible with Time Electronics’ EasyCal software which includes

an in-built driver to allow speedy automatic calibration runs.

1GHz sweep 10MHz - 2.2GHz levelised sine wave output (1Vpp). Precision bandwidth calibration

Rubidium reference Rubidium atomic clock frequency reference. Increases freq/per acc to 1 in 10 E 10

Current probe adapter A battery powered adapter for checking current probes. 0.1-100mA, 0.2% accuracy

OPTIONS

Chapter 3 SETUP & FRONT PANEL

3.1 Mains Input Voltage

The supply power is connected via a standard IEC Euro connector on the rear panel.

The standard voltage supply is 100V - 230V 50/60Hz. There are two protection fuses

mounted in the IEC connector assembly, both are T3.15A slow blow.

3.2 Communication Settings

The 5041 can communicate via GPIB or RS232 (serial) connection. GPIB preferred if

other instruments are to be used on the same bus. Note GPIB operation requires the

PC to be fitted with a GPIB interface card and the relevant software drivers. Time

Electronics option 9743 or equivalent are suitable.

The 5041 hardware communications settings are set using the DIP Switch on the rear

panel. Note: All switches are in the OFF position when set to the left, and ON when set

to the right.

(see rear panel photo on following page).

DIP Switch Use

1 GPIB/RS232 OFF = GPIB ON = RS232

2-6 Binary-coded GPIB address (not used if RS232 is selected)

When the switches are OFF (to the left) they have the value 0

When the switches are ON (to the right), they have the values,

Switch 2 = 1

Switch 3 = 2

Switch 4 = 4

Switch 5 = 8

Switch 6 = 16

The GPIB address is determined by the sum of the switch values.

For example, to set the GPIB address to 20:

Set switch 4 (value 4) and switch 6 (value 16) ON

Set switches 2, 3, and 5 OFF

Address = 0+0+4+0+16 = 20

7-8 Not used – Keep in the OFF position

Page 5

Only change the DIP switch settings while the unit is turned off – changes in DIP

switch settings will not be recognized while the unit is on.

3.3 Communication Connections

The 5041 must be connected to the PC by a GPIB cable or a “straight-through”

RS232 cable. Do not connect or disconnect the unit from the PC while the 5041 or

PC is switched on.

Page 6

Note that all commands taking parameters must have at least one space after the command

itself before the first parameter. Multiple parameters must be separated by commas, although

spaces are optional.

Standard Function Commands

These are the commands that are used to set the output of the device.

* - Command is valid only in frequency or period mode.

+ - Command is valid only in amplitude mode.

Command Description Example

FUNC? Return the output current function. Will return

either “F”, “P”, “A”, “FR” or “OFF”

FUNC?

F <Hertz> Set the frequency to the value specified in

Hertz (0.1 – 100000000)

F 0.15

F? *Return current frequency setting in Hz F?

P <seconds> Set the period to the value specified in

seconds (0.00000001 – 15)

P 0.5

P? *Return the current period setting in seconds P?

D <%> *Set the duty cycle to the value specified in %

(0.0001 – 99.9999)

D 20.2

D? *Return the current duty cycle setting D?

SWA <mV> Sets the 2.2 GHz Sweep Amplitude (in mV) SWA 1000

SWF <kHz> Sets the 2.2 GHz Sweep Frequency (in kHz) SWF 10000

A <Volts> Set the output voltage to the value specified

in Volts (0.000001 – 20)

A 10.2

A? +Return the current amplitude setting in Volts A?

+Set the graticule height to the number

specified (0 – 9)

G 1

G? +Return the current graticule height G?

WAVE DC +Set the wave to DC WAVE DC

WAVE SQ +Set the wave to 1kHz square wave WAVE SQ

WAVE? +Return the current wave setting WAVE?

50R ON +Turn on 50Ohm mode 50R ON

50R OFF +Turn off 50Ohm mode 50R OFF

50R? +Return the 50Ohm mode setting 50R?

FR Switch to fast rise output mode FR

OFF Turn all outputs off OFF

3.4 GPIB User Commands

Other User Commands

Other commands the user may need to use to set-up the unit.

Command Description Example

ERROR? Return the error code of the last error ERROR?

GET ON Enter GET mode GET ON

GET OFF Leave GET mode GET OFF

*TRG GET mode trigger *TRG

TERM 1 Set the transmit terminator to CR TERM 1

TERM 2 Set the transmit terminator to LF TERM 2

TERM 12 Set the transmit terminator to CR+LF TERM 12

TERM 21 Set the transmit terminator to LF+CR TERM 21

TERM 0 Set the transmit terminator nothing TERM 0

*IDN? Return the identity of the unit *IDN?

*RST Perform a full reset of the unit *RST

*TST? Perform a self-test of the unit. Returns an

error code or 0.

*TST?

3.5 Front Panel

The LED indicators on the front panel are, Mains On, Amplitude, GHz Sweep, Time

Markers and Data. The data transfer over the communications link is indicated by the

Data led flashing.

The 16-character alphanumeric display indicates the unit’s current output, e.g. the

output frequency, period, or amplitude. It also shows error messages which are also

indicated by a short beep from the internal buzzer.

LED Meaning

Power The unit is switched on

Data Flashes to indicate data received on the comms port (GPIB or

RS232)

Amplitude When lit, this indicates that there is output from the amplitude

BNC connector.

Time Markers When lit, indicates that there is an output signal from the Time

Markers BNC connector

GHz Sweep

(if fitted)

When lit, indicates that there is an output signal from the GHz

Sweep connector

Page 7

3.6 Output Connections

There are 2 (or 3, if the GHz sweep option is fitted) connectors on the front panel of the

5041. From left to right these are:

Amplitude Output

The output from this connector is used to calibrate the amplitude scale of

oscilloscopes. Output can be varied between 1mV and 200V maximum. Output is

either DC or 1kHz square wave.

GHz Sweep Output

This is only present if the 2.2GHz Sweep option is fitted. The output is adjustable from

10MHz up to 2.2GHz. When an output signal is present, the LED above the connector

is lit.

Time Marker

The output from this BNC is used to calibrate the time-base of oscilloscopes, and the

period and frequency readouts of digital oscilloscopes. It is also suitable for calibration

of timer/counters. Duty cycle calibration is also performed using this BNC. When an

output signal is present on this connector, the LED above is lit.

Note:

Good quality, 50 Ohm impedance leads e.g. RG58C/U are recommended for correct

performance at high frequencies. Length is not critical but 1 metre or less is

recommended.

Page 8

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