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Keysight (Agilent) 478A

Coaxial Thermistor Mount
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Description
The Agilent 478A provides high efficiency and good radio frequency (RF) match. Used in conjunction with the N432A or 432A power meters, they provide high accuracy even in routine power measurements. These thermistor mounts are temperature compensated for low drift, even in the presence of thermal shocks, permitting measurement of microwave power as low as one microwatt. Each mount contains data showing calibration factor and effective efficiency at six frequencies, directly traceable to the U.S. National Institute Standards and Technology (NIST) at those frequencies where NIST provides calibration service.

Features:
  • High accuracy even in routine power measurements
  • Temperature compensated for low drift
  • Measures microwave power as low as one microwatt
  • Shows calibration factor and effective efficiency at 12 frequencies
  • Frequency Range: 10 MHz to 10 GHz
  • Maximum SWR: 10 MHz to 25 MHz 1.75; 25 MHz to 7GHz 1.30; 7 GHz to 10 GHz 1.50
  • Available options: 478A-H75 and 478A-H76 for frequency range 1 MHz to 1 GHz (Max. SWR 1.3, 1.05 at 50 MHz). 478A-H76 provides standard lab calibration at 50 MHz
List of Options
100 Freq range 10MHz to 10GHz
1BN Military Standard 45662A Calibration Certification
910 Additional operating and service manual
H09 10 MHz to 10 GHz with 900 MHz-1300 MHz data in 50 MHz steps
H13 100kHz to 1GHz, max VSWR 1.8 to 300kHz, 1.3 to 1GHz Calibrated at 100, 300, 500 kHz 1,3,5,10,30,50,100,300,500, and 1000 MHz
H42 STDS LAB CAL AT 100 MHZ
H55 Frequency range from 1MHz to 1GHz; Operates with 432A ONLY (US Ref) Frequency range: 1 MHz to 1 GHz SWR: 1.3 MAX.
H57 Standards lab cal at 30 MHz, 1, 5, 8.2, 10 GHz
H63 100 KHz to 1 GHz OPERATION (usable with 432A/B/C ONLY); Cal.Data not included FREQ. RANGE: 100 KHz TO 1 GHz MAX. VSWR: 300 KHz TO 1 GHz = 1.3
H72 Frequency Range 1 MHz- 1 GHz VSWR 1.1 1 -100 MHz; 1.2 100- 1000 MHz
H73 Coaxial thermistor mount, 1-100 MHz, VSWR 1.05 at 50 MHZ, 1.1 1-100 MHz
H75 Frequency Range 1 MHz - 1 GHz SWR 1.3 Max, 1.05 @ 50 MHz
H76 Frequency Range 1 MHz - 1 GHz; SWR 1.3 Max, 1.05 @ 50 MHz; Primary Standard Calibration @ 50 MHz
H78 Standards Lab Calibration
H81 STANDARDS LAB. CAL. 0.1,0.3,0.5, 1, 1.5, AND 2 GHZ
H83 1 MHz to 1 GHz. Max SWR 1.3 except at 50 MHz max SWR of 1.05 with Std Lab cal The 478A-H83 is an 478A-H75 that gets a standards lab calibration at
H84 STDS LAB CAL at Freq's specified in the detail description (12 pts) Standards Lab. Cal for Cal. Factor, Cal. Factor Uncertainty, and RHO Data at
H88 MODIF .1MHZ-1GHZ OPER.;MAX SWR 1.3;EXCEPT 1.05 @30,50,100MHZ;STD CAL DATA
H89 Mod. for 1MHz-1000MHz Range ONLY; SWR MAX 1.05, 10-100MHz; 10,50,100MHz Cal
H90 SAME AS STD UNIT PLUS LAB CALIBRATION AT 11, 12, 12.4 GHZ
H91 50MHz - 90 MHZ OPERATION ONLY, SWR 1.1, AND STANDARD LAB CAL AT 70 MHZ
H92 RANGES: 1MHZ-1GHZ; 95-100% CAL.FACTOR; 1UW-10MW; MAX VSWR STEPS; W/OPT 9
H93 Freq range 1MHz to 1GHz, max SWR 1.3 except 1.05 at 50MHz. Std lab cal at 50MHz and 100MHz
H94 MODIFIED FOR 1MHz-1GHz Oper.;1.05 SWR (50MHz);W/Stds Data 30,50,100,1000 MODIFIED FOR 1 MHz TO 1 GHz OPERATION. MAXIMUM SWR 1.3 EXCEPT AT 50 MHz
H95 Freq range 1MHz - 1000 MHz; measures PWR level of 1uW TO 10mW
K92 STANDARDS LAB CAL AT 11, 12, 12.4 GHZ
K96 Standards Lab Cal at 50MHz *** see H76 *****
R-50C-011-3 Agilent Calibration - 3 years
R-50C-011-5 Agilent Calibration - 5 years
R-50C-021-3 ANSI Z540-1-1994 Calibration - 3 years
R-50C-021-5 ANSI Z540-1-1994 Calibration - 5 years
R-51B-001-3C Return to Agilent Warranty - 3 years
R-51B-001-5C Return to Agilent Warranty - 5 years
R-51B-001-C Return to Agilent Warranty - 1 year
Specifications & Attributes (Power Sensor)
Form Factor
Plug-In
Frequency Range
50 MHz - 90 MHz ( /H91 )
.1 MHz - 1 GHz ( /H88 )
100 KHz - 1 GHz ( /H63 )
1 MHz - 1 GHz ( /H55 /H72 /H75 /H76 /H83 /H92 /H93 /H94 )
1 MHz - 1000 MHz ( /H89 /H95 )
10 GHz
10 MHz - 10 GHz ( /100 )

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