Tektronix P6248 Instructions Manual
  1. Manuals
  2. Brands
  3. Tektronix Manuals
  4. Measuring Instruments
  5. P6248
  6. Instructions manual
Tektronix P6248 Instructions Manual

Tektronix P6248 Instructions Manual

Differential probe
Hide thumbs Also See for P6248:
Table of Contents

Advertisement

Quick Links

Download this manual
xx
®
P6248
1.7 GHz (Typical)
Differential Probe
ZZZ
Instructions
*P071056604*
071-0566-04
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)

Advertisement

Table of Contents
loading

Related Manuals for Tektronix P6248

Summary of Contents for Tektronix P6248

  • Page 1 ® Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) P6248 1.7 GHz (Typical) Differential Probe Instructions *P071056604* 071-0566-04...
  • Page 3 P6248 1.7 GHz (Typical) Differential Probe Instructions www.tektronix.com 071-0566-04...
  • Page 4 Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions. Tektronix products are covered by U.S. and foreign patents, issued and pending.
  • Page 5 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 returned to any other locations.

  • Page 7: Table Of Contents

    Nominal Characteristics ......... . P6248 1.7 GHz Differential Probe Instructions...
  • Page 8 ............Figure 7: Typical differential input impedance versus frequency . . Figure 8: Probe head and compensation box dimensions ... P6248 1.7 GHz Differential Probe Instructions...
  • Page 9 Table 1: Features and standard accessories ......Table 2: P6248 Probe tip accessory kit contents ..... . .

  • Page 10: General Safety Summary

    Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation. P6248 1.7 GHz Differential Probe Instructions...
  • Page 11 DANGER indicates an injury hazard immediately accessible as you read the marking. WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. The following symbol(s) may appear on the product: P6248 1.7 GHz Differential Probe Instructions...

  • Page 12: Environmental Considerations

    European Union’s requirements according to Directive 2002/96/EC on waste electrical and electronic equipment (WEEE). For information about recycling options, check the Support/Service section of the Tektronix Web site (www.tektronix.com). Restriction of Hazardous Substances This product has been classified as Monitoring and Control equipment, and is outside the scope of the 2002/95/EC RoHS Directive.

  • Page 13: Preface

    This manual contains instructions and specifications for using the P6248 differential probe. Related Manuals For performance verification procedures, adjustment procedures, a list of replaceable parts, and other service information, refer to the P6248 Service Manual (071-0573-XX). P6248 1.7 GHz Differential Probe Instructions...
  • Page 14 Preface viii P6248 1.7 GHz Differential Probe Instructions...

  • Page 15: Getting Started

    Getting Started The P6248 is a high-bandwidth differential probe with the TEKPROBE interface. The P6248 probe has a bandwidth of 1.5 GHz (1.7 GHz typical). The probe has low circuit loading, high common-mode rejection, and comes with accessories that accommodate a wide variety of applications.
  • Page 16 Replacement part number: 016-1952-XX Calibration certificate. A certificate of traceable calibration is provided with every instrument shipped. Instructions. Provides instructions for operating the P6248 differential probe. Replacement part number: 071-0566-XX P6248 1.7 GHz Differential Probe Instructions...
  • Page 17 10 Color marker bands 2 Tip savers 1 Solder-down adapter, one-inch 1 Solder-down adapter, three-inch 2 Y-lead adapters 2 Longhorn via adapters 8 Straight tip adapters 3 MicroCKT test tips 2 Ground leads Replacement part number: 020-2702-XX P6248 1.7 GHz Differential Probe Instructions...

  • Page 18: Table 2: P6248 Probe Tip Accessory Kit Contents

    Getting Started The contents of the probe tip accessory kit are described below. (See Table 2.) Table 2: P6248 Probe tip accessory kit contents Accessory Description Color marker bands. Attach matching pairs of the color marker bands onto the cable at the head and compensation box of each probe.
  • Page 19 Getting Started Table 2: P6248 Probe tip accessory kit contents (cont.) Accessory Description Y-lead adapter. The Y-lead adapter plugs directly into the probe. The socketed ends of the leads may be connected to the probe tips and accessories, or fitted onto 0.025-inch pins.

  • Page 20: Table 3: Optional Accessories And Instrument Options

    Getting Started The optional accessories that you can order for the P6248 differential probe are shown below. (See Table 3.) Table 3: Optional accessories and instrument options Accessory/Option Description TPA–BNC Adapter. Use this adapter to connect the P6248 probe to Tektronix oscilloscopes that feature the TekVPI interface.
  • Page 21 Replacement part number: 016-1782-XX (package of 6) TwinTip adapter. This accessory provides two adjustable tips for probing connections that are close to each other. Replacement part number: 016-1786-XX (package of 4) P6248 1.7 GHz Differential Probe Instructions...
  • Page 22 Adjustment tool. Use for making internal adjustments to the probe. Replacement part number: 003-0675-XX Calibration data (Option 95). Option 95, which must be ordered at the time of purchase, documents the measurements taken during calibration. P6248 1.7 GHz Differential Probe Instructions...

  • Page 23: Installation

    NOTE. TDS400 and TDS400A series oscilloscopes do not interpret the scale factor coding of the P6248 differential probe. This problem is only apparent when the probe is in the ÷1 position. To correct for this problem, divide the measurement (or scale factor) by 10 when you use the probe in the ÷1 position.
  • Page 24 Getting Started P6248 1.7 GHz Differential Probe Instructions...

  • Page 25: Operating Basics

    CAUTION. To avoid damaging the inputs of the P6248 differential probe, do not apply more than ±25 V (DC + peak AC) between each input and ground. Common-Mode Signal Range...

  • Page 26: Attenuation Settings

    In addition to the 3-inch ground lead, there are optional ground lead accessories that are useful in certain applications, for example, the short ground contact. (See Figure 2.) P6248 1.7 GHz Differential Probe Instructions...

  • Page 27: Input Impedance And Probe Loading

    When you connect the probe inputs to a circuit, you are introducing a new resistance, capacitance, and inductance into the circuit. Each input of the P6248 differential probe has a characteristic input impedance of 100 kΩ to ground in parallel with less than 1 pF. (See Figure 3.) For signals with low source impedance and frequency, the 100 kΩ...

  • Page 28: Common-Mode Rejection

    Common-Mode Rejection The common-mode rejection ratio (CMRR) is the specified ability of a P6248 differential probe to reject signals that are common to both inputs. More precisely, CMRR is the ratio of the differential gain to the common-mode gain. The higher the ratio, the greater the ability to reject common-mode signals.

  • Page 29: Reference

    Voltage that is common to both inputs is often referred to as the Common-Mode Voltage (V and voltage that is different as the Differential-Mode Voltage (V P6248 1.7 GHz Differential Probe Instructions...

  • Page 30: Figure 4: Simplified Model Of A Differential Amplifier

    CMRR generally is highest (best) at DC and degrades with increasing frequency. Assessing CMRR Error A graph of the CMRR of the P6248 differential probe is shown in the Specifications section. (See Figure 6 on page 24.) This derating chart assumes a common-mode signal that is sinusoidal.

  • Page 31: Extending The Input Leads

    CAUTION. To avoid damaging the input connectors, do not insert anything larger than a 0.025-inch square pin into the inputs. Use the tip saver accessory to preserve the integrity of the input connectors. P6248 1.7 GHz Differential Probe Instructions...

  • Page 32: Extending The Ground Lead

    50 Ω. If the measurement instrument does not support 50 Ω input termination, connect a 50 Ω coaxial termination on the input. P6248 1.7 GHz Differential Probe Instructions...

  • Page 33: Using The Probe With Other Instruments

    As the frequency of a signal increases, current flow concentrates at the outer edges of the conductor, effectively increasing the impedance. This effect is known as skin loss. The P6248 probe contains circuitry to compensate for skin loss. The compensation provides flat response with the probe cable.
  • Page 34 Reference P6248 1.7 GHz Differential Probe Instructions...

  • Page 35: Specifications

    Specifications The specifications in the following tables apply to a P6248 probe installed on a Tektronix TDS694C oscilloscope. When the probe is used with another oscilloscope, the oscilloscope must have an input impedance of 50 Ω. The probe must have a warm-up period of at least 20 minutes and be in an environment that does not exceed the limits described in the temperature and humidity sections of the table.
  • Page 36 To avoid a burn hazard at high ambient temperatures, do not touch the probe with bare hands at operating temperatures above +50 °C or at nonoperating temperatures above +70 °C. Allow sufficient time for the probe to cool before handling. P6248 1.7 GHz Differential Probe Instructions...

  • Page 37: Typical Characteristics

    DC to ≥1.85 GHz (-3dB) @ ≤27 ºC (÷10) Random noise <50 nV/√Hz at 100 MHz Input impedance (See Figure 7 on page 24.) Pass band ripple ≤±0.25 dB to the 3 dB bandwidth (deviation from a nominal slope) P6248 1.7 GHz Differential Probe Instructions...

  • Page 38: Figure 6: Typical Common-Mode Rejection Ratio

    Specifications Figure 6: Typical Common-Mode Rejection Ratio (÷1 and ÷10 attenuation) Figure 7: Typical differential input impedance versus frequency The impedance graph represents simulation results of a first order model of the probe input. P6248 1.7 GHz Differential Probe Instructions...

  • Page 39: Figure 8: Probe Head And Compensation Box Dimensions

    78 mm × 12 mm × 9.3 mm (3.0 in × 0.47 in × 0.36 in) Dimensions, output cable 1.2 m (47 in) Unit weight (probe only) 160 g (5.4 oz) Figure 8: Probe head and compensation box dimensions P6248 1.7 GHz Differential Probe Instructions...

  • Page 40: Nominal Characteristics

    (See Table 7.) Table 7: Nominal electrical characteristics Input configuration Differential (two inputs, + and - ), with case ground Output coupling Attenuation settings ÷1 and ÷10 Termination Terminate output into 50 Ω P6248 1.7 GHz Differential Probe Instructions...

Table of Contents