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Caltest CT4121 User Manual

Summary of CT4121

  • Page 1

    Ct4121 user manual 1 mΩ // 3 pf 1.2 ghz active fet probe 10:1 with 50 Ω t ermination power led 1.2 ghz 10:1 1 mΩ // 3 pf 40 v pk.

  • Page 2: Safety Summary

    800-572-1028 caltestelectronics.Com 1 safety summary to avoid personal injury and/or product damage, review and comply with the following safety precautions. These precautions apply to both operating and maintenance personnel and must be followed during all phases of operation, service, and repair o...

  • Page 3: Grounded Instruments

    800-572-1028 caltestelectronics.Com 2 being tested when a fault condition in the circuit exists. Capacitors inside the instrument may retain a charge even if the instrument is disconnected from its source of supply. Grounded instruments use only grounded instruments. Do not connect the probe’s groun...

  • Page 4: Use Proper Power Source

    800-572-1028 caltestelectronics.Com 3 use proper power source do not operate this probe from a power source that applies more than the voltage specifi ed. Compliance statements disposal of old electrical & electronic equipment (applicable in the european union and other european countries with separ...

  • Page 5: 1  Introduction

    800-572-1028 caltestelectronics.Com 4 1 introduction overview the ct4121 is a compact fet probe with very high input resistance and low input capacitance. With a 1.2 ghz bandwidth, this probe is ideal for timing analysis or troubleshooting high speed logic circuits, for design verification of disk d...

  • Page 6: 2  Product Overview

    800-572-1028 caltestelectronics.Com 5 • (2) microleads, 0.8 mm, pin-jack, 10 cm, black/red • (4) ground pin, bent • (6) test tip, uninsulated, 0.8 mm x 11.6 mm 2 product overview ct4121 description offset adjust linear range @ 10:1 absolute max range ±15 v dc+peakac ±40 v dc+peakac ct4121 active fet...

  • Page 7: 3  Using The Probe

    800-572-1028 caltestelectronics.Com 6 3 using the probe power connection slide open the battery compartment and attach a 9 v battery to the snap connector. Place the battery inside compartment and then slide the cover back in place. See figure 2. Figure 2 battery connection alternatively, connect th...

  • Page 8: Warning

    800-572-1028 caltestelectronics.Com 7 warning at the time of powering on the probe, the input leads must not be connected to an item to be tested. Never operate the probe with the case open. Inspection procedure 1. Connect the bnc output connector to the vertical input of the oscilloscope. 2. Power ...

  • Page 9: 4  Cleaning

    800-572-1028 caltestelectronics.Com 8 vertical scale on oscilloscope the actual vertical scale of the oscilloscope is equal to the attenuation factor (10x) multiplied by the range of vertical scale selected on the oscilloscope. For example, with the oscilloscope on 2.0 v/div, the real vertical scale...

  • Page 10: 5  Specifications

    800-572-1028 caltestelectronics.Com 9 5 specifications all specifications apply to the unit after a temperature stabilization time of 20 minutes over an ambient temperature range of 25 °c ± 5 °c. Electrical specifications parameter characteristics bandwidth (-3db) 1.2 ghz rise time (probe only) 291 ...

  • Page 11: Parameter

    800-572-1028 caltestelectronics.Com 10 mechanical characteristics parameter characteristics weight 200 g dimensions 83 x 19 x 14 mm cable length 120 cm (total) environmental characteristics parameter characteristics operating temp/humidity -10°c to 40°c / up to 85% rh storage temp/humidity -30°c to ...

  • Page 12: Frequency Response

    800-572-1028 caltestelectronics.Com 11 figure 5 frequency response of ct4121 frequency response.

  • Page 13

    800-572-1028 caltestelectronics.Com 12 10 9 input i mpedanc e ( ohm) 10 7 10 6 10 5 10 4 10 3 10 2 10 1 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 1 frequency (hz) black - measured by lcr meter grey - simulated by altium software figure 6 input impedance vs frequency data graph input impedance vs frequ...

  • Page 14

    800-572-1028 caltestelectronics.Com 13 6 service & warranty information limited one-year warranty cal test electronics warrants this product to be free from defective material or workmanship for a period of 1 year from the date of original purchase. Under this warranty, cal test electronics is limit...

  • Page 15

    800-572-1028 caltestelectronics.Com 14 notes.

  • Page 16

    © 2017 cal test electronics 450830-001 rev. A.