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10 TEGAM WAY • GENEVA, OHIO 44041 440-466-6100 • FAX 440-466-6110 • www.tegam.com 

2-1 

Section II – Preparation for Use and Installation 

 

Unpacking & Inspection 

Each Coaxial RF Power Standards is put through a series of electrical and mechanical inspections before 

shipment to the customer. Upon receipt of your instrument unpack all of the items from the shipping 

carton and inspect for any damage that may have occurred during transit. Report any damaged items to 

the shipping agent. Retain and use the original packing material for reshipment if necessary.  

 

Upon Receipt, inspect the carton for the following items: 

 

Table 2.1 Packing List 

Item 

Part Number 

Model 2505A or 1505A Coaxial RF Power 

Standards 

2505A or 1505A 

Technical (Operation and Maintenance) Manual 

1505A/2505A-900 

Calibration Certificate with Data 

N/A 

 

 

Mounting 

The Model 2505A is shipped with four plastic feet mounted to the bottom cover. When any of these 

models are placed on a bench or table, the feet support the instrument. For rack mounting of Model 

2505A use rack mount kit, (Single) P/N 1830-910 – (Dual) P/N 1830-911. 

 

The Model 1505A is shipped without any type of rack mounting equipment the new design allows for use 

as a terminating sensor and its low weight of 544.3 g (1.2 lb) reduces any stress on connectors. 

 

Only use with Proper Equipment: 

Connecting this device to any other type of circuit or may result in permanent damage to the components. 

Additionally, the heater elements used for the internal heater are designed to be used only with the heater 

control circuits found in TEGAM Models 1830A, 1820B, 1806A, 1806, and 1805B. 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.  

 

Use in Proper Environment 

Normal calibration laboratory practice dictates that the environment should be closely controlled. This will 

minimize errors introduced by temperature and humidity changes. A nominal temperature of +23°C 

(+73.4°F) provides a good working condition. A tolerance of ±1°C gives an ideal temperature spread. 

Controlled temperatures also stabilize the aging process of the standards. 

 

CAUTION: The RF Power Standards have a specified operating temperature range of +15° to +30° C 

(+59° to +86° F). Operating beyond these limits can affect the accuracy of the instruments and damage 

internal circuitry. 

 

CAUTION: When an RF Power Standard is to be stored for extended periods, pack the instrument into a 

container. Place container in a clean, dry, temperature-controlled location. If instrument is to be stored in 

excess of 90 days, place desiccant with items before sealing container. The safe environmental limits for 

storage are -55° to +75° C (-67° to +167° F) at less than 95% non-condensing relative humidity. 

 

 

 

 

Summary of Contents for 1505A

Page 1: ...TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 www tegam com RF Coaxial Power Standards Models 1505A and 2505A Instruction and Service Manual PN 1505A 2505A 900 Publication Date March 2016 REV C ...

Page 2: ...R meters handheld temperature calibrators thermometers humidity and temperature control devices and more TEGAM also repairs and calibrates test and measurement equipment formerly manufactured by Electro Scientific Industries ESI Gertsch Keithley Instruments Lucas Weinschel and Pragmatic Instruments A complete list can be viewed on our Product Service Directory at www tegam com For more information...

Page 3: ...llation Unpacking Inspection 2 1 Recommended Operating Environment 2 1 III Principles of Operation Power Measurements 3 1 Principles of DC Substitution 3 1 Temperature Variable Resistance 3 1 Power Splitters 3 1 Controlling Thermistor Temperature 3 2 IV Operating Instructions Front Panel Connectors 4 1 Calculating Calibration Factors 4 2 Relationship between k gamma And effective efficiency 4 7 V ...

Page 4: ...damage to the equipment or other property WARNING statements identify conditions or practices that could result in personal injury or loss of life Terms as Marked on Equipment CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equipment itself DANGER indicates a personal injury hazard immediately accessible as one re...

Page 5: ...alibration laboratory These units are highly accurate stable with time and temperature and are designed for use as a standard for the characterization of calibration factors for other sensors Table 1 1 General Specifications Frequency Range 6 kHz to 18 GHz Max Power 25 mW 14 dBm RF Impedance 50 Ohms nominal Power Linearity Typical Usable Range 0 1 from 1 to 10 mW 20 dBm to 10 dBm 0 01 to 10 mW typ...

Page 6: ...2 100 MHz to 2 GHz 0 03 2 GHz to 8 GHz 0 12 8 GHz to 12 GHz 0 15 12 GHz to 18 GHz 0 25 Loss from Input Port to DUT Port 8 5 dB typical N A Calibration Factor Accuracy typical 0 70 from 6 kHz to 10 MHz 0 80 from 0 01 to 10 GHz 1 00 from 10 0 to 18 GHz 0 90 from 6 kHz to 10 MHz 1 00 from 0 01 to 10 GHz 1 20 from 10 0 to 18 GHz Test Port Connectors Type N Connector Female Type N Connector Male Weight...

Page 7: ... only CA 29 48 RF Signal Generator o 6 kHz to 18 GHz o Minimum power level 10 dBm at 18 GHz Torque Wrench o Torque wrench 12 0 in lbs 1130 911 01 Optional RF Amplifier SureCAL Software P N SureCAL PM Rack Mount Kit for 2505A o Single P N 1830 910 o Dual P N 1830 911 VNA o 2 port o 18 GHz TEGAM 1505A For calibration of TEGAM 2505A Transport Case o 1505 RF Power Standard 1500 910 o 1830A F113X 2505A...

Page 8: ...f even importance a detailed written description of the problem should be attached to the instrument Many times repair turnaround is unnecessarily delayed due to a lack of repair instructions or of a detailed description of the problem This description should include information such as measurement range and other instrument settings type of components being tested are the symptoms intermittent co...

Page 9: ...the processing and repair process RMA Instrument Model Serial Number Company Technical Contact Phone Number Additional Contact Info Repair Instructions Evaluation Calibration Only Repair Only Repair Calibration Z540 Extra Charge Detailed Symptoms Include information such as measurement range instrument settings type of components being tested is the problem intermittent When is the problem most fr...

Page 10: ...tion 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 Repaired products are warranted for the remaining balance of the original warranty or 90 days whichever period is longer Warranty Limitations The TEGAM Inc warranty does not apply to def...

Page 11: ...oper Equipment Connecting this device to any other type of circuit or may result in permanent damage to the components Additionally the heater elements used for the internal heater are designed to be used only with the heater control circuits found in TEGAM Models 1830A 1820B 1806A 1806 and 1805B Connecting these heater elements to any other circuit or device may result in damage Contact TEGAM for...

Page 12: ...d Installation Do Not Use in Explosive Environments CAUTION The 1505A and 2505A are not designed for operation in explosive environments Do Not Operate Without Covers WARNING This device should be operated with all panels and covers in place Operation with missing panels or covers could result in personal injury ...

Page 13: ...oaxial 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 Temperature Variable Resistance Each RF Standard contains a pair of thermistor beads whereby the resistance changes as a function of temperature Thermistor bead temperature is a function of the combined DC and RF power applied to the beads and...

Page 14: ...stant power causes the common point divider to become a constant voltage point This means the source impedance at both splitter output ports is determined by the 50 ohm resistor and the output connector This provides very good source match In addition the power is split equally between the two ports Controlling Thermistor Temperature Since thermistor mounts are temperature sensitive devices it is ...

Page 15: ...ptions Figure 4 1 TEGAM 2505A Connectors RF IN connector SMA female connector connects to signal generator output The RF power that comes in this connector is applied equally to the DUT and the power standard The fact that equal RF power is applied to both the power standard and the DUT is what allows the determination the calibration factor of the DUT There is at least 6 dB and as much as 8 5 dB ...

Page 16: ...able CA 29 48 RF INPUT connector Type N male coaxial connector where RF power to be measured is applied Connecting RF Power Standards The TEGAM RF Standards are an element of a system and is not a stand alone instrument The 2505A and 1505A RF Power Standard can only be connected to the TEGAM 1830A 1806A and 1806 Unlike other TEGAM RF Power Standards the bias and temperature are connected through o...

Page 17: ...user must know that the measurement is accurate and there is traceability to a known standard All diode thermo electric and thermistor power sensors have calibration factors associated to particular frequencies that are used to insure an accurate power measurement Technicians and engineers use these calibration factors when making measurements but where do these calibration factors really come fro...

Page 18: ...𝑃𝑆𝑆𝑆𝑆 𝑃𝑆𝑆𝑆𝑆 Because power sensors are always imperfect loads additional analysis and sometimes correction is required Figure 4 1 shows a signal flow diagram of two one port devices connected together The left hand port is the output or generator port and is designated on the diagram using the subscript g The right hand port is the input or load port and is designated using the subscript l It s cle...

Page 19: ...ram 𝑏𝑔 𝑏𝑠 Γ𝑔𝑎𝑔 But also 𝑎𝑔 𝑏𝑙 Γ𝑙𝑎𝑙 Γ𝑙𝑏𝑔 So substituting the second equation into the first 𝑏𝑔 𝑏𝑠 Γ𝑙Γ𝑔𝑏𝑔 And then re arrange to collect bg 𝑏𝑔 𝑏𝑠 1 Γ𝑙Γ𝑔 Now rewrite as power substituting in 𝑃 𝑔𝑧0 𝑏𝑠 2 and 𝑃𝑖 𝑏𝑔 2 𝑃𝑖 𝑃 𝑔𝑧0 1 Γ𝑙Γ𝑔 2 s b g a a r i d P P P Γ 2 a Pi 2 b Pr g Γ s g g g b a b Γ b a Γ 1 1 Figure 4 3 Signal Flow Diagram ...

Page 20: ... terms are the reflection scattering parameter of the respective port noted in the subscript Gamma is a complex vector with scalar values denoting the real and imaginary magnitudes Γ 𝜌 𝜙 𝜌 cos 𝜙 i𝜌sin 𝜙 In the general transfer equation the term 1 Γ𝑀Γ𝐹 2 is the scalar gamma correction or port match term Inside the absolute value brackets however is a vector subtraction Expanding out to make the ang...

Page 21: ...nts the probable error of the transfer Since we can t know the angles in an uncorrected transfer we let cos take its limits of 1 and say that the uncertainty of the uncorrected transfer is 2𝜌𝑀𝜌𝐹 That is a little pessimistic because that is worst case rather than probable but it s what the industry usually does Unless the rhos were measured on a scalar analyzer we have to use manufacturer s worst c...

Page 22: ...10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 www tegam com 4 8 Section IV Operating Instructions Figure 4 4 Relationship between calibration factor gamma and effective efficiency ...

Page 23: ...onnectors Also inspect the connector interfaces for the following Bent pins male Bent or missing tines female Worn or chipped plating Damaged or displaced dielectric inserts Thread damage Folded or mushroomed outer interface rims Mushroomed pin shoulders male or tine ends female Score lines on pins and outer interface rims visible to the unaided eye Recessed or protruding pins It is advisable to c...

Page 24: ... connectors have been properly mated apply only the proper amount of torque Over torque damages both connectors involved Also a connector which has been damaged by over torque in turn damages every connector to which it is subsequently mated It usually leads to poor system performance as well Over torque can cause Bent pins Recessed or protruding pins Recessed or protruding dielectrics Chipped pla...

Page 25: ...isopropyl alcohol Roll the swab on a paper towel to remove excess Use the moistened cotton swab to wipe away debris Do not try to dissolve the debris by over wetting the swab Repeat the cleaning process using additional swabs as necessary If metallic particles are embedded in the dielectric use an eyeglass and a sharp pick in an attempt to dislodge them Swab again When satisfied that the interface...

Page 26: ...nformation o Any error messages that appeared on the power meter display o Any information on the performance of the Power Standard 2 Use the original packaging materials or a strong shipping container The carton must be both large enough and strong enough to accommodate the power standard and allow at least three to four inches on all sides of the power standard for packing material 3 Seal the sh...

Page 27: ...ored for extended periods pack the instrument into a container Place container in a clean dry temperature controlled location If instrument is to be stored in excess of 90 days place desiccant with items before sealing container The safe environmental limits for storage are 55 to 75 C 67 to 167 F at less than 95 non condensing relative humidity ...

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