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Tegam F1125 Instruction And Service Manual

Coaxial rf power standards
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MODELS F1125 (A), F1130 (A) (B), F1135 (A) (B),
M1125 (A), M1130 (A), M1135 (A)
Coaxial RF Power Standards
Instruction and Service Manual
PN# IM300
Publication Date: April 2015
REV. R

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Summary of Contents for Tegam F1125

  • Page 1 MODELS F1125 (A), F1130 (A) (B), F1135 (A) (B), M1125 (A), M1130 (A), M1135 (A) Coaxial RF Power Standards Instruction and Service Manual PN# IM300 Publication Date: April 2015 REV. R...
  • Page 2 TEGAM INC. MODELS F1125(A), F1130(A)(B), F1135(A)(B), M1125(A), M1130(A), M1135(A) Coaxial RF Power Standards Model M1125 Model F1125 Model M1130 Model F1130 Model M1135 Model F1135 Instruction and Service Manual PN# IM300 Publication Date: April 2015 REV. R NOTE: This user’s manual was as current as possible when this product was manufactured. However, products are constantly being updated and improved.
  • Page 3 Weinschel, and Pragmatic Instruments. A complete list can be viewed on our Product Service Directory at www.tegam.com For more information about TEGAM and our products, please visit our website at www.tegam.com: or contact one of our customer service representatives at sales@tegam.com...

  • Page 4: Table Of Contents

    Use Care When Servicing with Power On or Off ........2-4 OPERATING INSTRUCTIONS ................3-1 General ....................3-2 Model F1125, F1130, and F1135 Connector Descriptions .......3-2 Figure 3.1 Model F1125 Front View ............3-2 Model M1125, M1130, and M1135 Connector Descriptions ......3-3 Figure 3.2 Model M1125/M1130/M1135 Rear View ........3-3 Connecting RF Power Transfer Standards ............3-4...
  • Page 5 Power Splitter Calibration ................5-3 Figure 5.2 Location of Power Splitter in the F1125/F1130 and F1135 ..5-3 Figure 5.3 Location of Allen Head Screws and Collar on F1125 and F1130 ..5-4 Figure 5.4 Location of Phillips Head Screws on F1135 Splitter Support Bracket ............5-5 Thermistor Bias Voltage Calibration ............5-6...

  • Page 6: Instrument Description

    Instrument Description INSTRUMENT DESCRIPTION PREPARATION FOR USE OPERATING INSTRUCTIONS THEORY OF OPERATION MAINTENANCE SERVICE INFORMATION Coaxial RF Power Standards Instruction and Service Manual...

  • Page 7: Abbreviations And Acronyms

    ESDS Electrostatic Discharge Sensitive NIST National Institute of Standards and Technology RF Radio Frequency DC Direct Current Figure 1.1 Models M1125 & F1125 Figure 1.2 Models M1130 & F1130 Figure 1.3 Models M1135 & F1135 Coaxial RF Power Standards Instruction and Service Manual...

  • Page 8: Description Of Equipment

    This standard was designed for use in the TEGAM System II Power Sensor Calibration System (Figure 1.4). The Reference RF Power Standard (or Terminating RF Power Standard) is a terminating thermistor mount used for the calibration of feedthrough standards (Figure 1.6) and applications...
  • Page 9 Instrument Description Table 1.2 F1125/M1125 Individual Specifications Model F1125 M1125 Frequency Range 100 kHz to 4.2 GHz 100 kHz to 4.2 GHz Max VSWR 1.06 from 100 kHz to 4.2 GHz 1.40 from 100 to 500 kHz 1.20 from 0.5 to 1 MHz 1.10 from 1 to 1000 MHz...
  • Page 10 Instrument Description Table 1.3 F1130/M1130 Individual Specifications Model F1130 M1130 Frequency Range 100 kHz to 18 GHz 100 kHz to 18 GHz Max VSWR 1.06 from 100 kHz to 6 GHz 1.30 from 100 to 500 kHz 1.10 from 6 to 15 GHz 1.10 from 0.5 to 1000 MHz 1.14 from 15 to 18 GHz 1.20 from 1 to 3 GHz...
  • Page 11 Instrument Description Table 1.4 F1135/M1135 Individual Specifications Model F1135 M1135 Frequency Range 10 MHz to 26.5 GHz 10 MHz to 26.5 GHz Max VSWR 1.25 from 0.01 to 18 GHz 1.50 from 10 to 20 MHz 1.35 from 18 to 26.5 GHz 1.40 from 20 to 50 MHz 1.30 from 50 to 100 MHz 1.20 from 0.1 to 4 GHz...

  • Page 12: Coaxial Rf Power Standards With An "A" And "B" Suffix In The Model Number

    1830A Applications The TEGAM RF Power Transfer Standards are an element of a system and are not “stand-alone” instruments. The TEGAM RF Power Transfer Standards are designed to be employed as the fourth arm of a bridge configuration. This unit is designed as the sensing element in RF power calibration and measurement systems.
  • Page 13 AM Out (rear of 1805B) Model 1805B Model F11XX RF IN TEMP IN SENSOR TEMPERATURE BIAS VOLTAGE BIAS VOLTAGE Figure 1.4 RF Power Sensor Calibration Using a Working Standard (Model F1125, F1130, F1135) Coaxial RF Power Standards Instruction and Service Manual...
  • Page 14 Instrument Description Power Meter Power Model M11XX Reference Model 1806 BRIDGE A BRIDGE B BIAS VOLTAGE TEMP VOLTMETER BIAS VOLTAGE TEMP VOLTMETER DVM or DMM Figure 1.5 Measuring a 50 MHz Reference Output on a Power Meter using a Terminating RF Power Standard (Model M1125, M1130, M1135) Signal Generator DVM or DMM AM Input...

  • Page 15: Preparation For Use

    Preparation for Use INSTRUMENT DESCRIPTION PREPARATION FOR USE OPERATING INSTRUCTIONS THEORY OF OPERATION MAINTENANCE SERVICE INFORMATION Coaxial RF Power Standards Instruction and Service Manual...

  • Page 16: Unpacking & Inspection

    When any of these models are placed on a bench or table, the feet support the instrument. The Model F1125 (A), F1130 (A), and F1135 (A) can also be rack mounted in a standard 19” rack, using the optional rack mount kit F1120-RMK.

  • Page 17: Symbols

    Preparation for Use DANGER indicates a personal injury hazard immediately accessible as one reads the marking. Symbols: As Marked in This Manual: This symbol denotes where precautionary information may be found. As Marked on Equipment: CAUTION – Risk of Danger DANGER –...

  • Page 18: Only Use With Compatible Instruments

    TEGAM Models 1805B, 1806(A), 1820 and 1830A. Connecting these heater elements to any other circuit or device may result in damage. Contact TEGAM for any questions regarding instruments that are compatible with these RF Power Standards. All equipment should be operated from either a regulated 115 VAC or 230 VAC supply.

  • Page 19: Operating Instructions

    Operating Instructions INSTRUMENT DESCRIPTION PREPARATION FOR USE OPERATING INSTRUCTIONS THEORY OF OPERATION MAINTENANCE SERVICE INFORMATION Coaxial RF Power Standards Instruction and Service Manual...

  • Page 20: General

    Operating Instructions General The TEGAM RF Power Standards are designed to be employed as the fourth arm of a bridge configuration. These units are designed as the sensing element in RF power calibration and measurement systems. These systems employ other electronic elements to effect control of the measurement routines.

  • Page 21: Model M1125, M1130, And M1135 Connector Descriptions

    DUT is what allows the calibration factor of the DUT to be determined. This connector is a type N on the F1125 and F1130 and a 3.5 mm on the F1135.

  • Page 22: Connecting Rf Power Transfer Standards

    Working RF Power Standard is being calibrated, the Reference RF Power Standard is connected to this port. This connector is an N type female on the F1125 and F1130 and a 3.5 mm on the F1135. Proper care, cleaning, alignment, and torquing of coaxial connectors should be practiced to reduce insertion loss and extend the life of the connectors.

  • Page 23: Theory Of Operation

    Theory of Operation INSTRUMENT DESCRIPTION PREPARATION FOR USE OPERATING INSTRUCTIONS THEORY OF OPERATION MAINTENANCE SERVICE INFORMATION Coaxial RF Power Standards Instruction and Service Manual...

  • Page 24: Temperature Variable Resistance

    Power Splitter The Models F1125, F1130, F1135 contain a two-element resistive power splitter. The T-shaped divider contains a series 50 ohm resistor in each of the two legs (refer to Figure 4.1). The test port is a Type N precision female.

  • Page 25: Controlling Thermistor Temperature

    K = calibration factor of the RF Power Standard traceable to NIST TEGAM Coaxial RF Power Standards are configured to provide a path for RF energy via a coaxial line. DC Bias is introduced from the Bias terminals to the thermistors via filtering capacitors.

  • Page 26: Power Measurements

    Theory of Operation Power Measurements RF power is measured in terms of a power change across the precision resistance leg of a Type IV Bridge Circuit. A digital voltmeter measures voltage across the precision resistance leg which can be used to determine the power by the following equation: Where: P = power across the precision resistance leg V = voltage measured across the precision resistance leg...

  • Page 27: Calibration Factors

    Theory of Operation CALIBRATION FACTORS For a Terminating RF Power Standard (M1125, M1130, M1135) K is denoted as the measure calibration factor (K ), and P is the RF power from a match-terminated source incident upon the mount. If the mount is connected to the side arm of a coupler or a port of a power splitter (a Feedthrough RF Power Standard), K is denoted as the monitor calibration factor (K ), and P the RF power emerging form the mount into a match terminated load.

  • Page 28: Sources Of Calibration Error

    If both the ρ and φ of the reflection coefficient are known for both the K1 and K2 or K2 and K1S (TEGAM provides this data for the RF Standards as part of the factory calibration), then Gamma corrections can be applied to the calibration factor. Applying Gamma corrections to the calibration...
  • Page 29 Theory of Operation Gamma corrections are applied to cal factor as follows: Corrected K |1 - Γ Γ Corrected K |1 - Γ Γ Where: = calibration factor of the Feedthrough RF Power Standard, = calibration factor of the DUT, = reflection coefficient of the Terminating RF Power Standard, Γ...

  • Page 30: Maintenance

    Maintenance INSTRUMENT DESCRIPTION PREPARATION FOR USE OPERATING INSTRUCTIONS THEORY OF OPERATION MAINTENANCE SERVICE INFORMATION Coaxial RF Power Standards Instruction and Service Manual...
  • Page 31 #1 and #2 Philips head screwdriver 1/4” wrench Note: The procedures in this chapter apply to the F1125, F1130, and F1135 Working RF Power Standards. If one of these units fails any Calibration procedure and cannot be adjusted to its specifications, contact TEGAM for assistance. Contact information and instructions for returning an instrument to TEGAM can be found in Chapter VI Service Information in this manual.

  • Page 32: Remove Top Cover

    Gamma corrections to the cal factor of the Standard. 1. Disconnect all cables from rear of the Thermistor Mount Assembly inside the Model F1125, F1130, or F1135. Disconnect the semi-rigid coaxial cable from the back of the RF IN bulk head connector.
  • Page 33 Figure 5.3 Locations of Allen Head Screws and Collar on F1125 and F1130 a) For Models F1125 and F1130 (Type N connectors): Refer to figure 5.3. Remove 2 Allen head screws that clamp power splitter input to Splitter Support Bracket. Remove collar that is over the thermistor mount output connector by loosening two set screws and sliding the collar forward.
  • Page 34 3. Setup and calibrate the Network Analyzer to measure insertion loss and SWR of the power splitter. Clean and inspect all coaxial connectors on the Network Analyzer, power splitter, and thermistor mount. TEGAM also recommends checking the pin depth of the power splitter and thermistor mount. Use care when connecting and disconnecting all coaxial connectors and use proper torque wrench when connecting.

  • Page 35: Thermistor Bias Voltage Calibration

    DC Substitution Bridge with no RF signal applied to the thermistor detector and the bridge circuit balanced and stable. Not only should this procedure be performed on the Working Standards (F1125, F1130, F1135) but also on the Reference Standards (M1125, M1130, M1135) before sending them to a primary standards lab for calibration.

  • Page 36: Calibration Factor

    Adjustment access hole. Calibration Factor This test characterizes the calibration factor of the Working Power Standards (F1125, F1130, and F1135). The Working standard is characterized from the SENSOR port using a Reference Power Standard (M1125, M1130, or M1135). This procedure can be automated using SureCAL Automated Metrology Software.
  • Page 37 Maintenance DVM or DMM DVM or DMM TEGAM Dual Type IV Power Meter Model 1806A BRIDGE A BRIDGE B BIAS BIAS TEMP VOLTMETER TEMP VOLTMETER POWER VOLTAGE VOLTAGE READY READY TEST TEST ERROR ERROR TEGAM Model F11XX RF IN TEMP IN...
  • Page 38 Maintenance 7. Set the Signal Generator frequency to the first frequency that the Working Standard will be calibrated at and set the power level for +6 dBm (for 0 dBm at SENSOR port) with a Continuous Wave (CW) output. Turn the output of the Signal Source on. After the voltage has settled, Record the DC voltage from the Reference Standard as V and the DC voltage from the Working Standard as V...

  • Page 39: Gamma Corrections (Optional)

    (φ) was measured and recorded during the Power Splitter Calibration. The Reflection Coefficient magnitude (ρ) and phase angle (φ) must also be known for the Reference RF Power Standard. TEGAM strongly recommends applying Gamma Corrections as it will provide a more accurate calibration with the lowest uncertainty.

  • Page 40: Service Information

    Service Information INSTRUMENT DESCRIPTION PREPARATION FOR USE OPERATING INSTRUCTIONS THEORY OF OPERATION MAINTENANCE SERVICE INFORMATION Coaxial RF Power Standards Instruction an Service Manual...

  • Page 41: Warranty

    TEGAM service center with shipping charges prepaid. TEGAM Inc. shall pay for the return of the product to the customer if the shipment is to a location within the country in which the TEGAM service center is located. The customer shall be responsible for paying all shipping, duties, taxes, and additional costs if the product is transported to any other locations.

  • Page 42: Repair Parts

    RF components within the RF Power Standard. In the event that damage or a malfunction has occurred, return the unit to TEGAM for repair and calibration. If the user chooses to replace an item within the RF Standard such as a connector or defective cable, the instrument must be recalibrated.

  • Page 43: Preparation For Calibration Or Repair Service

    Once you have verified that the cause for the RF Power Standard malfunction cannot be solved in the field and the need for repair and calibration service arises, contact TEGAM customer service to obtain an RMA, (Returned Material Authorization), number. You can contact TEGAM customer service via the TEGAM website, www.tegam.com...

  • Page 44: Expedite Repair & Calibration Form

    Service Information Expedite Repair & Calibration Form Use this form to provide additional repair information and service instructions. The completion of this form and including it with your instrument will expedite the processing and repair process. RMA#: Instrument Model #: Serial Company: Number:...

This manual is also suitable for:

F1125aF1130F1130aF1130bF1135F1135a ... Show all

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