Tektronix Vm700a vmtb User manual

Operators Manual

VM700A

Probe Adapter

063-0927-00

Please check for change information at the rear

of this manual.

First Printing August 1991

Reprint September 1993

Advanced Test Equipment Rentals

www.atecorp.com 800-404-ATEC (2832)

®

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United States of America. Contents of this publication may not be repro-

duced in any form without the written permission of Tektronix, Inc. Speci-

fication and price change privileges are reserved.

This instrument, in whole or in part, may be protected by one or more U.S.

patents or foreign patents or patent applications.

TEKTRONIX, TEK, PLOT 10, TEKTEST, and SCOPE-MOBILE are reg-

istered trademarks.

For further information, contact Tektronix, Inc., Corporate Offices, P. O.

Box 1000, Wilsonville, OR 97070–1000. Phone: (503) 627–7111; TLX:

192825; TWX: (910) 467–8708; Cable: TEKWSGT.

WARRANTY

Tektronix warrants that this product will be free from defects in materials and workmanship for a period

of one (1) year from the date of shipment. If any such product proves defective during this warranty period,

Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will

provide a replacement in exchange for the defective product.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expi-

ration of the warranty period and make suitable arrangements for the performance of service. Customer

shall be responsible for packaging and shipping the defective product to the service center designated by

Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if

the shipment is to a location within the country in which the Tektronix service center is located. Customer

shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products re-

turned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inade-

quate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to

repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair

or service the product; b) to repair damage resulting from improper use or connection to incompatible

equipment; or c) to service a product that has been modified or integrated with other products when the

effect of such modification or integration increases the time or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU

OF ANY OTHER WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VEN-

DORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR

A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DE-

FECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUS-

TOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT

BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAM-

AGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NO-

TICE OF THE POSSIBILITY OF SUCH DAMAGES.

Probe Adapter 1

PROBE ADAPTER

(067–1429–00 to 067–1429–05)

PURPOSE

The Tektronix Probe Adapter accessory is designed to interface a Tektronix P6109 10X probe to the

VM700A Video Measurement Set. This accessory is intended for use in manufacturing and repair

applicationswheninternalsignalsofandeviceundertestareaccessibleonlyusingahigh-impedance

probe. The Probe Adapter provides the impedance matching and signal gain needed to drive the 75Ω

inputs of the VM700A.

ÎÎÎÎ

ÎÎÎ

ÎÎ

Î

ÎÎÎÎ

ÎÎÎ

Î

Front Panel

Rear Panel

ÎÎÎÎÎ

Î

ÎÎ



067-1429-00 PROBE ADAPTER

INPUT

(10K PROBE)

1MW, 20 pF

42 V PEAK MAX

LINE VOLTAGE

SET FOR 90–132V OUTPUT

(75 OHM)

10 VA MAX

49–66 Hz

Figure 1. The VM700A Probe Adapter.

APPLICATION

When the Probe Adapter accessory is used, accurate measurement results are obtained by using the

relative-to-reference feature of the VM700A’s Measure Mode. The relative-to-reference feature

subtracts out distortions introduced by the Probe Adapter, thereby providing measurement results

that represent distortions introduced by the device under test. This feature removes the effects of the

0.3degreedifferentialphaseand0.3%differentialgainthatareinherentintheProbeAdapter,aswell

as any frequency response flatness errors.

Operating Information Probe Adapter

2

Frequencyresponseflatnessfrom10Hzto100kHzisstronglydependentontheaccuracyoftheprobe

compensation. It is recommended that each probe be compensated to match the individual Probe

Adapter that it will be used with. This adjustment should be made by observing the effect on the

mid-field transition of a field square-wave signal.

Flatness in the 100 kHz to 10 MHz range varies a great deal between probe types. The Probe Adapter

circuitry is optimized for the Tektronix P6109 10X probe, a common low-cost probe. Other 10X

oscilloscope probes capable of driving a 1 MΩ, 20 pF input may be used, but they can degrade the

flatness of the frequency response.

TwoadditionaleffectsofmakingmeasurementsthroughtheProbeAdaptershouldbenoted.First,the

video signal-to-noise ratio is degraded from the VM700A’s typical 82 dB to approximately 73 dB with

theProbeAdapter.Secondly,theProbeAdapterintroducessomeoutputoffsetvoltageandsomeminor

tilt effects due to ac coupling. Both of these effects are normally eliminated by the clamping

capabilities of the VM700A.

The 1 MΩ10X probe connector provides a high impedance signal input that produces minimal circuit

loading for the device under test. The output of the probe adapter is at 75Ωto match the input of the

VM700A.Usehigh quality 75ΩBNCcoaxialcable to connecttothe VM700A input,andterminate the

signal line with a 75Ωtermination at the last device in the signal path as shown in Figure 2.

ÎÎ

Î

ÎÎ

75WBNC coaxial cable

75WTermination

P6109 10X Probe

To device under test

VM700A

Figure 2. Typical hookup for the Probe Adapter.

Probe Adapter Operating Information

3

SPECIFICATIONS

The specifications given in Table 1 for gain, frequency response, and tilt are with a P6109 probe that

has been properly compensated for the Probe Adapter with which it is to be used.

Table 1

Specifications

ÁÁÁÁÁÁÁÁÁÁÁ

Characteristic

ÁÁÁÁÁÁÁÁÁÁÁ

Specification

ÁÁÁÁÁÁÁÁÁÁÁÁ

Supplemental Information

ÁÁÁÁÁÁÁÁÁÁÁ

Input Resistance

ÁÁÁÁÁÁÁÁÁÁÁ

1 MΩ±0.5%

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

Input Capacitance

ÁÁÁÁÁÁÁÁÁÁÁ

20 pF ±2 pF

ÁÁÁÁÁÁÁÁÁÁÁÁ

Use a compensated probe

ÁÁÁÁÁÁÁÁÁÁÁ

Gain

ÁÁÁÁÁÁÁÁÁÁÁ

X1 ±2%

ÁÁÁÁÁÁÁÁÁÁÁÁ

From 10X probe tip, into 75Ω

ÁÁÁÁÁÁÁÁÁÁÁ

Frequency Response

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

10 Hz to 100 kHz

ÁÁÁÁÁÁÁÁÁÁÁ

±1%

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

100 kHz to 10 MHz

ÁÁÁÁÁÁÁÁÁÁÁ

±1%

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

Differential Gain

ÁÁÁÁÁÁÁÁÁÁÁ

≤0.3%

ÁÁÁÁÁÁÁÁÁÁÁÁ

Measured with 1910 or VM700A

ÁÁÁÁÁÁÁÁÁÁÁ

Differential Phase

ÁÁÁÁÁÁÁÁÁÁÁ

≤0.3°

ÁÁÁÁÁÁÁÁÁÁÁÁ

Measured with 1910 or VM700A

ÁÁÁÁÁÁÁÁÁÁÁ

Output Offset Voltage

ÁÁÁÁÁÁÁÁÁÁÁ

≤±50 mV

ÁÁÁÁÁÁÁÁÁÁÁÁ

≤±10 mV at 25°C

ÁÁÁÁÁÁÁÁÁÁÁ

Á

ÁÁÁÁÁÁÁÁÁ

Á

ÁÁÁÁÁÁÁÁÁÁÁ

Video SNR

ÁÁÁÁÁÁÁÁÁÁÁ

Á

ÁÁÁÁÁÁÁÁÁ

Á

ÁÁÁÁÁÁÁÁÁÁÁ

≥70 dB rms

ÁÁÁÁÁÁÁÁÁÁÁÁ

Á

ÁÁÁÁÁÁÁÁÁÁ

Á

ÁÁÁÁÁÁÁÁÁÁÁÁ

VM700A Noise Spectrum, un-

weighted

ÁÁÁÁÁÁÁÁÁÁÁ

Tilt (ac coupled)

ÁÁÁÁÁÁÁÁÁÁÁ

≤1% on a 50 Hz square wave

ÁÁÁÁÁÁÁÁÁÁÁÁ

≤5% when driven from 75Ω

ÁÁÁÁÁÁÁÁÁÁÁ

Output Impedance

ÁÁÁÁÁÁÁÁÁÁÁ

75Ω±1%

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

Line Voltage Range

ÁÁÁÁÁÁÁÁÁÁÁ

90 to 132 Vac or 180 to 250 Vac

ÁÁÁÁÁÁÁÁÁÁÁÁ

Internally set by a service person

ÁÁÁÁÁÁÁÁÁÁÁ

Line Frequency Range

ÁÁÁÁÁÁÁÁÁÁÁ

48 to 62 Hz

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

Power Consumption

ÁÁÁÁÁÁÁÁÁÁÁ

≤2W

ÁÁÁÁÁÁÁÁÁÁÁÁ

Operating Information Probe Adapter

4

ELECTRICAL PARTS LIST Table 2

Electrical Parts Lists

ÁÁÁÁÁÁÁÁÁÁ

Circuit Reference

ÁÁÁÁÁ

Quantity

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Description

ÁÁÁÁÁÁÁ

Part Number

ÁÁÁÁÁÁÁÁÁÁ

C1,C2,C3,C4

ÁÁÁÁÁ

4

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Capacitor, 0.1µF

ÁÁÁÁÁÁÁ

281-0775-01

ÁÁÁÁÁÁÁÁÁÁ

C5,C6

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Capacitor, 470µF

ÁÁÁÁÁÁÁ

290-0919-00

ÁÁÁÁÁÁÁÁÁÁ

C7,C8

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Capacitor, 0.47µF

ÁÁÁÁÁÁÁ

281-0563-00

ÁÁÁÁÁÁÁÁÁÁ

C9,C10

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Capacitor, 10µF

ÁÁÁÁÁÁÁ

290-0804-01

ÁÁÁÁÁÁÁÁÁÁ

C11,C17

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Not installed

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

C12

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Capacitor, 4-40pF

ÁÁÁÁÁÁÁ

281-0187-00

ÁÁÁÁÁÁÁÁÁÁ

C14

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Capacitor, 0.1µF

ÁÁÁÁÁÁÁ

285-0526-00

ÁÁÁÁÁÁÁÁÁÁ

C15

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Capacitor, 4700pF

ÁÁÁÁÁÁÁ

281-0772-00

ÁÁÁÁÁÁÁÁÁÁ

C16

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Capacitor, 10pF

ÁÁÁÁÁÁÁ

281-0811-00

ÁÁÁÁÁÁÁÁÁÁ

CR1

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Diode Bridge

ÁÁÁÁÁÁÁ

152-0585-00

ÁÁÁÁÁÁÁÁÁÁ

CR2

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Diode

ÁÁÁÁÁÁÁ

152-0246-00

ÁÁÁÁÁÁÁÁÁÁ

F1

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Fuse 0.1 A, 250 V, 3AG Medium Blow

ÁÁÁÁÁÁÁ

159-0171-00

ÁÁÁÁÁÁÁÁÁÁ

F2, F3

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Fuse, self-healing, RXE020, 0.2 A

ÁÁÁÁÁÁÁ

307-1593-00

ÁÁÁÁÁÁÁÁÁÁ

FL1

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Line Filter

ÁÁÁÁÁÁÁ

119-1946-00

ÁÁÁÁÁÁÁÁÁÁ

J1

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Connector, Wire Set

ÁÁÁÁÁÁÁ

198-5783-00

ÁÁÁÁÁÁÁÁÁÁ

J2,J4

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Connector, BNC Female

ÁÁÁÁÁÁÁ

131-3379-00

ÁÁÁÁÁÁÁÁÁÁ

J3

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Connector, Sq Pin Jumper

ÁÁÁÁÁÁÁ

131-0993-00

ÁÁÁÁÁÁÁÁÁÁ

Q1

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Transistor, 151-1031-00

ÁÁÁÁÁÁÁ

151-1031-00

ÁÁÁÁÁÁÁÁÁÁ

R1

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 464.0KΩ

ÁÁÁÁÁÁÁ

322-3449-00

ÁÁÁÁÁÁÁÁÁÁ

R2

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 1.00MΩ

ÁÁÁÁÁÁÁ

321-0481-07

ÁÁÁÁÁÁÁÁÁÁ

R3

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 402.0Ω

ÁÁÁÁÁÁÁ

322-3155-00

ÁÁÁÁÁÁÁÁÁÁ

R4,R6

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 200.0Ω

ÁÁÁÁÁÁÁ

322-3126-00

ÁÁÁÁÁÁÁÁÁÁ

R5

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 374.0Ω

ÁÁÁÁÁÁÁ

322-3152-00

ÁÁÁÁÁÁÁÁÁÁ

R7

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 75.0Ω

ÁÁÁÁÁÁÁ

322-3085-07

ÁÁÁÁÁÁÁÁÁÁ

R8

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 1.15KΩ(0.1%)

ÁÁÁÁÁÁÁ

321-0199-07

ÁÁÁÁÁÁÁÁÁÁ

R9

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 7.32KΩ

ÁÁÁÁÁÁÁ

322-3276-00

ÁÁÁÁÁÁÁÁÁÁ

R10

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 50.5Ω

ÁÁÁÁÁÁÁ

321-1068-07

ÁÁÁÁÁÁÁÁÁÁ

R11

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 100.0Ω

ÁÁÁÁÁÁÁ

322-3097-00

ÁÁÁÁÁÁÁÁÁÁ

R12

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 50ΩVariable

ÁÁÁÁÁÁÁ

311-2226-00

ÁÁÁÁÁÁÁÁÁÁ

R13

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Resistor, 10.0Ω

ÁÁÁÁÁÁÁ

322-3001-00

ÁÁÁÁÁÁÁÁÁÁ

T1

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Transformer, 120-14ASIG

ÁÁÁÁÁÁÁ

120-1905-00

ÁÁÁÁÁÁÁÁÁÁ

TP1,TP2,TP3,TP4,TP5, TP6

ÁÁÁÁÁ

6

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Terminal, Test point

ÁÁÁÁÁÁÁ

214-4085-00

ÁÁÁÁÁÁÁÁÁÁ

U1

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

IC, MC7815

ÁÁÁÁÁÁÁ

156-0312-00

ÁÁÁÁÁÁÁÁÁÁ

U2

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

IC, MC7915

ÁÁÁÁÁÁÁ

156-0527-00

ÁÁÁÁÁÁÁÁÁÁ

U3

ÁÁÁÁÁ

1

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

IC, CLC404

ÁÁÁÁÁÁÁ

156-3962-00

ÁÁÁÁÁÁÁÁÁÁ

VR1,VR2

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Zener, 10V

ÁÁÁÁÁÁÁ

152-0149-00

ÁÁÁÁÁÁÁÁÁÁ

VR3,VR4

ÁÁÁÁÁ

2

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Zener, 6.2V

ÁÁÁÁÁÁÁ

152-0166-00

Probe Adapter Operating Information

5

INTERNATIONAL POWER CORDS

Powercordsareprovidedtomatchavarietyofmainsconnectionsthroughouttheworld.SeeTable3for

plugconfigurations,typicaluse,andProbeAdapterpartnumbertoorder. Aseparatepartnumberhas

beenprovidedtopermitthe customer to order the Probe Adapter with the power cordneededfortheir

application. Probe Adapters ordered for countries having 220V AC power are internally set for 220V

operation and have a label affixed on the rear panel to that effect.

Table 3

Probe Adapter Part Numbers

Plug Configuration Typical Use Probe Adapter Part Number

United States 115V 067–1429–00

European 220V 067–1429–01

United Kingdom 240Va067–1429–02

Australian 240V 067–1429–03

North American 240V 067–1429–04

Switzerland 220V 067–1429–05

aA 6 Ampere, type C fuse is also installed inside the plug of the United Kingdom power cord.

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PROBE ADAPTER 1

VM700A PROBE ADAPTER

Tektronix VM700A VMTB User manual

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