Thurlby Thandar Instruments TGP110 User Manual [en, de, fr, it]

THURLBY THANDAR INSTRUMENTS

Model TGP110

10MHz PULSE GENERATOR

INSTRUCTION MANUAL

Table of Contents

Introduction 2
Specification 3
Safety 6
EMC 7
Installation 8
Operation 9
Maintenance 12
Instructions en Francais
Sécurité 13
Installation 14
Fonctionnement 15
Entretien 18

Bedienungsanleitung auf Deutsch

Sicherheit 19
Netzbetriebsspannung 20
Betrieb 21
Wartung 24
Istruzioni in Italiano
Sicurezza 25
Installazione 26
Funzionamento 27
Manutenzione 30
Instrucciones en Español
Seguridad
Instalación 31
Operación 33
Mantenimiento 36

1

Introduction

The TGP110 is a mains operated, 0·1Hz to 10MHz pulse generator with independent variable
50Ω Main and CMOS/TTL Auxilliary outputs. Period, pulse width and delay are each selected by
an 8 position range switch, plus a vernier control.

There are no duty cycle limitations and with the use of the Complement switch very stable pulse
trains with duty cycles of ~0 to ~100% can be achieved, within the overall period and pulse width
limitations. Error lamps indicate illegal settings of the pulse width and pulse delay controls.

The variable 50Ω output is controlled by a vernier over two switch-selectable ranges of 0·1V to
1·0V and 1V to 10V (from 50Ω), giving an overall range of 50mV to 5V into a 50Ω load.

Operating modes are run, external trigger, external gate, and manual one-shot or gate. The pulse
modes are normal, square, double and delayed. The Complement button inverts both the Main
and Auxilliary outputs.

A Sync output and a Trigger/Gate input are also provided.

2

PERIOD

100ns to 10s (10MHz to 0·1Hz) in 8 overlapping decade ranges, with separate vernier providing
continuously variable control within each range.

Jitter: <0·1%.

PULSE WIDTH

50ns to 5s in 8 overlapping decade ranges, with separate vernier providing continuously variable
control within each range. The Overlap lamp lights when the pulse width is set greater than the
period.

Jitter: <0·1%.

PULSE DELAY

100ns to 5s in 8 overlapping decade ranges, with separate vernier providing continuously variable
control within each range. The overlap lamp lights when the pulse delay is set greater than the
period.

GATED OPERATION

Specification

0·1Hz to 10MHz pulse train, parameters set by Period and Pulse Width controls, starts
synchronously with leading edge of Gate input. Last pulse is completed at the end of gating
period.

TRIGGERED OPERATION

DC to 10MHz pulse train in synchronism with external Trigger pulses; pulse width determined by
Pulse Width controls.

DOUBLE PULSE

A second pulse is generated after a delay from the leading edge of the first pulse set by the Pulse
Delay controls.

DELAYED PULSE

The pulse is generated after a delay from the Trigger signal set by the Pulse Delay controls.

SQUAREWAVE

0·1Hz to 10MHz squarewave, frequency set by the Period controls.
Mark:Space ratio typically 1:1 ± 10%.

COMPLEMENT

Inverts both the MAIN (50Ω) and AUX outputs.

MANUAL

With Triggered selected: Pressing Manual initiates a single pulse of duration determined by

the Pulse Width controls.

With Gate selected: 0·1Hz to 10MHz pulse train set by the Period and Pulse Width

controls for the duration of button depression.

3

TRIGGER/GATE IN

Frequency Range: DC - 10MHz

Signal Range:
Trigger Delay: Typically 100ns from trigger edge to MAIN OUT transition.
Gate Delay: Approximately 20% of the PERIOD range setting +80ns from gate leading

Minimum Pulse Width: >30ns.

Threshold nominally TTL level; maximum input ±10V.

edge to MAIN OUT transition.

Input Impedance:

Typically 10kΩ.

MAIN 50Ω OUTPUT

Amplitude:

V

low: <5% of Amplitude +100mV (1V-10V range).

OUT

Rise/Fall Times:

Aberrations:

Two switch selectable ranges of 0·1V - 1·0V and 1V - 10V from 50Ω.
(50mV to 500mV and 500mV to 5V into 50Ω). Adjustable within ranges by
a single turn vernier.

Typically 10ns into 50Ω load.
Maximum 15ns.

Typically <5%, for output set at >20% of range maximum, into 50Ω.

AUX OUTPUT

CMOS/TTL level, signal with the same timings as MAIN OUT; leads MAIN

OUT by typically 15ns.

SYNC OUTPUT

Amplitude: A positive going pulse at CMOS/TTL level.
Timing: Leading edge occurs typically 40ns before the MAIN OUT transition in all

pulse modes and typically 10ns after MAIN OUT in Square mode.

Duration: Typically 30ns.

GENERAL

Power: 220V-240V or 110V-120V AC ±10%, 50/60Hz, adjustable internally;

20VA max. Installation Category II.
Operating Range: + 5°C to 40°C, 20-80% RH.
Storage Range: -40°C to 70°C.
Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2.
Safety: Complies with EN61010-1.
EMC: Complies with EN61326.
Size: 220(W) x 130(H) x 230(D)mm, excluding feet.
Weight: 1·6kg.

4

EC Declaration of Conformity

We Thurlby Thandar Instruments Ltd
Glebe Road
Huntingdon
Cambridgeshire PE29 7DR
England

declare that the

TGP110 10MHz Pulse Generator

meets the intent of the EMC Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC.
Compliance was demonstrated by conformance to the following specifications which have been
listed in the Official Journal of the European Communities.

EMC

Emissions: a) EN61326-1 (2006) Radiated, Class B

b) EN61326-1 (2006) Conducted, Class B
c) EN61326-1 (2006) Harmonics, referring to EN61000-3-2 (2006)

Immunity: EN61326-1 (2006) Immunity Table 1, referring to:

a) EN61000-4-2 (1995) Electrostatic Discharge
b) EN61000-4-3 (2006) Electromagnetic Field
c) EN61000-4-11 (2004) Voltage Interrupt
d) EN61000-4-4 (2004) Fast Transient
e) EN61000-4-5 (2006) Surge
f) EN61000-4-6 (2007) Conducted RF
Performance levels achieved are detailed in the user manual.

Safety
EN61010-1 Installation Category II, Pollution Degree 2.

CHRIS WILDING
TECHNICAL DIRECTOR

1 May 2009

5

Safety

This instrument is Safety Class I according to IEC classification and has been designed to meet
the requirements of EN61010-1 (Safety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use). It is an Installation Category II instrument intended for operation
from a normal single phase supply.

This instrument has been tested in accordance with EN61010-1 and has been supplied in a safe
condition. This instruction manual contains some information and warnings which have to be
followed by the user to ensure safe operation and to retain the instrument in a safe condition.

This instrument has been designed for indoor use in a Pollution Degree 2 environment in the
temperature range 5°C to 40°C, 20% - 80% RH (non-condensing). It may occasionally be
subjected to temperatures between +5°C and –10°C without degradation of its safety. Do not
operate while condensation is present.

Use of this instrument in a manner not specified by these instructions may impair the safety
protection provided. Do not operate the instrument outside its rated supply voltages or
environmental range.

WARNING! THIS INSTRUMENT MUST BE EARTHED

Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited. The protective action must not be
negated by the use of an extension cord without a protective conductor.

When the instrument is connected to its supply, terminals may be live and opening the covers or
removal of parts (except those to which access can be gained by hand) is likely to expose live
parts. The apparatus shall be disconnected from all voltage sources before it is opened for any
adjustment, replacement, maintenance or repair.

Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided
as far as possible and, if inevitable, shall be carried out only by a skilled person who is aware of
the hazard involved.

If the instrument is clearly defective, has been subject to mechanical damage, excessive moisture
or chemical corrosion the safety protection may be impaired and the apparatus should be
withdrawn from use and returned for checking and repair.

Make sure that only fuses with the required rated current and of the specified type are used for
replacement. The use of makeshift fuses and the short-circuiting of fuse holders is prohibited.

Do not wet the instrument when cleaning it.
The following symbols are used on the instrument and in this manual:-

Caution -refer to the accompanying documentation, incorrect
operation may damage the instrument.

alternating current.

terminal connected to chassis (ground).

6

This instrument has been designed to meet the requirements of the EMC Directive 2004/108/EC.
Compliance was demonstrated by meeting the test limits of the following standards:

Emissions

EN61326-1 (2006) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use. Test limits used were:

a) Radiated: Class B
b) Conducted: Class B
c) Harmonics: EN61000-3-2 (2006) Class A; the instrument is Class A by product category.

Immunity

EN61326-1 (2006) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use.

Test methods, limits and performance achieved are shown below (requirement shown in
brackets):

a) EN61000-4-2 (1995) Electrostatic Discharge : 4kV air, 4kV contact, Performance A (B).

EMC

b) EN61000-4-3 (2006) Electromagnetic Field:

c) EN61000-4-11 (2004) Voltage Interrupt: ½ cycle and 1 cycle, 0%: Performance B (B);

d) EN61000-4-4 (2004) Fast Transient, 1kV peak (AC line), 0·5kV peak (signal connections),
Performance B (B).

e) EN61000-4-5 (2006) Surge, 0·5kV (line to line), 1kV (line to ground), Performance A (B).
f) EN61000-4-6 (2007) Conducted RF, 3V, 80% AM at 1kHz (AC line only; signal

connections <3m, therefore not tested), Performance A (A).
According to EN61326-1 the definitions of performance criteria are:

Performance criterion A: ‘During test normal performance within the specification limits.’
Performance criterion B: ‘During test, temporary degradation, or loss of function or

performance which is self-recovering’.
Performance criterion C: ‘During test, temporary degradation, or loss of function or

performance which requires operator intervention or system reset occurs.’

Cautions

To ensure continued compliance with the EMC directive observe the following precautions:

3V/m, 80% AM at 1kHz, 80MHz – 1GHz: Performance A (A) and 1.4GHz to 2GHz:
Performance A (A); 1V/m, 2.0GHz to 2.7GHz: Performance A (A).

25 cycles, 70% and 250 cycles, 0%: Performance B (C).

a) Connect the generator to other equipment using only high quality, double−screened cables.
b) After opening the case for any reason ensure that all signal and ground connections are

remade correctly and that case screws are correctly refitted and tightened.

c) In the event of part replacement becoming necessary, only use components of an identical

type, see the Service Manual.

7

MAINS OPERATING VOLTAGE

The operating voltage of the instrument is shown on the rear panel. Should it be necessary to
change the operating voltage from 230V to 115V or vice-versa, proceed as follows:

1. Disconnect the instrument from all voltage sources.

2. Remove the 4 screws which hold the upper and lower case halves together and lift off the
case upper.

3. Remove the 4 screws which hold the power supply printed circuit board to the case lower.

4. Change the appropriate zero-ohm links in the pcb:

Link LK1 only for 230V operation
Link LK2 and LK3 only for 115V operation

5. Refit the pcb to the case lower, ensuring all connections (especially safety earth) are
remade as before, and refit the case upper.

6. To comply with safety standard requirements the operating voltage marked on the rear
panel must be changed to clearly show the new voltage setting.

Installation

MAINS LEAD

When a three core mains lead with bare ends is provided it should be connected as follows:

Brown - Mains live
Blue - Mains Neutral
Green/Yellow - Earth

Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited.

WARNING! THIS INSTRUMENT MUST BE EARTHED

8

POWER

The OPERATE switch turns the instrument on. The switch is on the secondary side of the mains
transformer. Disconnect from the AC supply by unplugging the mains cord from the back of the
instrument or by switching off at the AC supply outlet; make sure that the means of disconnection
is readily accessible. Disconnect from the AC supply when not in use. The OPERATE lamp lights
to show when the instrument is on.

PERIOD, PULSE WIDTH and DELAY CONTROLS

Period, pulse width and pulse delay are each set by the appropriate 8-position switch and vernier
control; the vernier provides continuous adjustment across the selected range.

The appropriate Overlap lamp lights when the pulse width or pulse delay is set greater than the
period.

The operation of the period, pulse width and pulse delay controls depends on the operating mode
selected, see below.

MODE SELECTION

The operating mode is selected by the FUNCTION/MODE control in combination with the Run­Triggered-Gated switch.

Operation

Run Modes

When Run is selected the generator free-runs as described below; external inputs are
disconnected.

With Pulse selected the frequency and pulse width are set by PERIOD and PULSE WIDTH
controls respectively; PULSE DELAY is inoperative.

With Square selected a squarewave is generated at a frequency set by the PERIOD controls;
PULSE WIDTH and PULSE DELAY are inoperative.

With Double Pulse selected two pulses are generated in each period; period and pulse width are
set by the PERIOD and PULSE WIDTH control respectively. The second pulse is generated after
a delay from the leading edge of the first pulse set by the PULSE DELAY control.

With Delayed Pulse selected a single pulse is generated in each period starting after a delay with
respect to the SYNC OUT signal set by the PULSE DELAY controls +40ns. Frequency and pulse
width are set by the PERIOD and PULSE WIDTH controls respectively.

Triggered Modes

For the Triggered modes described below the trigger is derived from either an external signal
applied to the TRIGGER/GATE IN socket or by pressing the Manual button. Pulse width is set by
the PULSE WIDTH controls. Refer also to the timing diagram.

With Pulse selected the generator produces a single pulse which starts typically 100ns after the
positive-going edge of the TRIGGER IN pulse or at each press of the Manual button. The
PERIOD and PULSE DELAY controls are inoperative.

With Double Pulse selected the generator produces two pulses for each trigger signal. The first
pulse of each pair starts typically 100ns after the positive-going edge of the TRIGGER IN pulse or
at each press of the Manual button. The PULSE DELAY controls set the time between the leading
edges of the first and second pulse. The PERIOD controls are inoperative.

With Delayed Pulse selected the generator produces a single pulse which starts after a delay, set
by the PULSE DELAY controls +100ns, from the positive-going edge of the TRIGGER IN pulse or
press of Manual. The PERIOD controls are inoperative.

Triggered Square mode is not available.

9

10

Gated Modes

When Gated is selected on the Run-Triggered-Gated switch the generator produces a train of
pulses which starts after a delay from the leading edge of the gating signal. The last pulse is
completed (i.e. normal pulse width) when the gating signal ends except for Square mode which is
terminated synchronously with the gating signal. The gating signal is derived from either an
external signal applied to the TRIGGER/GATE IN socket or by pressing the Manual button. The
delay from the leading edge of the gating signal to the first pulse is approximately 20% of the
PERIOD range setting plus 80ns; the vernier setting has minimal effect.

The PERIOD, PULSE WIDTH and PULSE DELAY controls set the pulse train parameters in
exactly the same way as for Run mode according to which FUNCTION/MODE position is
selected. Refer also to the timing diagram.

COMPLEMENT

The Complement switch inverts both AUX OUT and MAIN OUT. It is most useful in generating
jitter-free large mark:space ratio waveforms which cannot be obtained in Normal mode. The
"space" instead of the "mark" is determined by the PULSE WIDTH controls in this mode.

MAIN OUT

The amplitude of MAIN OUT is controlled by the 2-position range switch and the AMPLITUDE
control which provides continuously variable adjustment within each range.

The output has a 50Ω source impedance and is designed to operate into a 50Ω load under which
condition the two ranges are 50mV to 500mV and 500mV to 5V. Good quality 50Ω coaxial cables
should be used. If the cable is not terminated with 50Ω, greater amplitude can be achieved but
cable reflections will cause aberrations on the waveform.

AUX OUT

The AUX OUT provides a TTL/CMOS compatible waveform with the same timings as MAIN OUT.
This output occurs approximately 15ns before MAIN OUT.

SYNC OUT

SYNC OUT provides a TTL/CMOS compatible pulse of typically 30ns duration which occurs
approximately 40ns before MAIN OUT in all Pulse modes. In Square mode the SYNC pulse
occurs approximately 10ns after the MAIN OUT leading edge.

TRIGGER/GATE IN

The TRIGGER/GATE IN is the control input for the triggered and gated modes which have
already been described. The input is a Schmitt trigger which can handle any wave shape from
DC-10MHz with >2V input level.

Do not apply external voltages exceeding ± 10V.

11