8472B-001

423B HP | Alldatasheet

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Technical content

mance make them useful measurement accessories. replaceable detector modules are available. Figure 1. Diode V/I characteristics

elements are available for economical customer repair. been tested to their respective specifi cations. Figure 5. Drawing dimensions given Figure 2. Detector frequency response specifi cations

1.4 LBSD

Figure 3. Detector SWR specifi cations

2.0 Source

1.5 Source

Figure 4. Measurement uncertainty due to detector source mismatch Figure 6. Typical detector square-law response

Specifi cations Specifi cations1 Agilent 423B Agilent 8473B Agilent 8473C Agilent 8470B Agilent 8472B Frequency response Octave band fl atness (over any octave 0 01 to 8 GHz) ±0.2 dB ±0.2 dB ±0.2 dB ±0.2 dB ±0.2 dB 0.01 to 18 GHZ: ±0.6 dB 0.01 to 12.4 GHz: ±0.3 dB 0.01 to 20 GHz: ±6 dB 20 to 26.5 GHz: ±1.5 dB from a 3.3 dB linear slope 0.01 to 12.4 GHz: ±0.3 dB 0.01 to 15 GHz: ±0.5 dB 0.01 to 18 GHz: ±0.6 dB 0.01 to 12.4 GHz: ±0.3 dB 0.01 to 15 GHz: ±0.5 dB SWR 3, maximum (50Ω characteristic impedance) 0.01 to 4 GHz: 1.15 4 to 12.4 G Hz: 1.30 0.01 to 4 GHz: 1.2 4 to 18 GHz: 1.5 0.01 to 4 GHz: 1.2 4 to 18 GHz: 1.5 18 to 26.5 GHz: 2.2 0.01 to 4 GHz: 1.15 4 to 15 GHz: 1.30 15 to 18 GHz: 1.70 0.01 to 4.5 GHz: 1.20 4.5 to 7 GHz: 1.35 Maximum operating input (Peak or average) 200 mW 200 mW 200 mW 200 mW 200 mW Short- term maximum Input (less than 1 min.) 1 watt (typical) 1 watt (typical) 1 watt (typical) 1 watt (typical) 1 watt (typical) Sensitivity 4 > 0.5 mV/μW > 0.5 mV/μW 0.01 to 18 GHz: > 0.5 mV/μW 18 to 26.5 GHz: > 0.1 8 mV/μW > 0.5 mV/μW > 0.5 mV/μW Noise (μV peak-to-peak with CW power applied to produce 100 mV output) < 50 μV < 50 μV < 50 μV < 50 μV < 50 μV Environmental qualifi cations Operating temperature Vibration Shock 0 to 55 °C

20 G’s, 80 - 2000 Hz

100 G’s, 11 ms

-20 °C to +85 °C -20 °C to +85 °C -20 °C to +85 °C -20 °C to +85 °C Output polarity Negative Negative Negative Negative Negative Input connector Type N Male 3.5 mm Male (SMA Compatible) 3.5 mm Male (SMA Compatible) APC-7 SMA Male Output connector BNC Female BNC Female BNC Female BNC Female BNC Female Video impedance 1 kΩ to 2 kΩ 1.3 kΩ (typical) 1 kΩ to 2 kΩ 1.3 kΩ (typical) 1 kΩ to 2 kΩ 1.3 kΩ (typical) 1 kΩ to 2 kΩ 1.3 kΩ (typical) 1 kΩ to 2 kΩ 1.3 kΩ (typical) RF bypass capacitor 20 pF to 60 pF 30 pF (typical) 20 pF to 60 pF 30 pF (typical) 20 pF to 60 pF 30 pF (typical) 20 pF to 60 pF 30 pF (typical) 20 pF to 60 pF 30 pF (typical) Dimensions in mm (inches) Length Diameter 63 (2.47) 20 (038) 48 (1.89) 10 (0.39) 43 (1.89) 10 (0.39) 64 (2.50) 19 (0.75) 64 (2.50) 14 (0.56) Weight in grams (oz) Net Shipping 114 (4) 454 (16) 14 (0.5) 454 (16) 14 (0.5) 454 (16) 114 (4) 454 (16) 57 (2) 454 (16) Options xxxx-001 Matched response Provides a pair of detectors with matched frequency response Tracking: 0.01 to 12.4 GHz: ±0.2 dB Tracking: 0.01 to 12.4 GHz: ±0.2 dB 12.4 to 18 GHz: ±0.3 dB Tracking: 0.01 to 12.4 GHz: ±0.2 dB 12.4 to 18 GHz: ±0.3 dB 18 to 26.5 GHz: ±0.5 dB Tracking: 0.01 to 12.4 GHz: ±0.2 dB 12.4to 18 GHz: ±0.3 dB Tracking: 0.01 to 12.4 GHz: ±0.2 dB 12.4to 18 GHz: ±0.3 dB xxxx-002 Optimum square-law load Optimum square -law load Optimum square -law load Optimum square -law load Optimum square -law load Optimum square -law load xxxx-003 Positive polarity out Positive polarity Output Positive polarity Output Positive polarity Output Positive polarity Output Positive polarity Output Specifi cations given for +25 °C unless otherwise noted. Specifi cations describe the instrument’s warranted performance. Supplemental characteristics (in italics) are intended to provide information useful in applying the instrument by giving typical, but not warranted, performance parameters. RF may leak through video connector especially below 1 GHz; if objectionable, this may be eliminated with low-pass fi lter. SWR measured at 2 dBm. Sensitivity decreases with increasing temperature typically 0.5 dB from 20 °C to +25 °C, 0.5 dB from +25 °C to +40v C. 1 dB from +40 °C to +55 °C, 1.25 dB from +55 °C to +75 °C, 1 dB from +75 °C to +85 °C.

© Agilent Technologies, Inc. 2009 Printed in USA, May 25, 2009 5952-8299

Applications

These detectors can be used in a wide variety of applications ranging from lab and production measurements to systems components. Because of their fl at- ness and match, these detectors can be used for accurately measuring trans- mission and refl ection characteristics in CW or swept-frequency measurements. For these applications in which both fl at-frequency response and square-law characteristics are important, Option 423B, 847xB/C–001 provides a matched pair of detectors that track each other within a few tenths of a dB, and Option 423B, 847xB/C–002 (external square-law load) extends the square-law region up to at least 0.1 mW (10 dBm). Other common applications include use with a coupler or power splitter to externally level a source, and to display pulsed-RF and AM-modulated signals. For OEM and systems applications, the broadband fl atness and ruggedness of these detectors make them particularly well suited for use in closed-loop level- ing circuits in microwave instrumentation. Square-law response For many refl ection and transmission measurements it is desirable to use the detector in its square-law region where its output voltage is proportional to the input RF power. As shown in fi gure 5, the LBSD typically operate within 0.5 dB of square-law from the tangential signal sensitivity (TSS) level up to 18 dBm. By specifying Option 423B, 847xB/C–002, a specially selected loading resistor is provided which extends this square-law region to approximately 8 dBm with an associated decrease in sensitivity as shown in fi gure 5. Pulse response The LBSD detectors have extremely good pulse detection characteristics when working into low-capacitance, low-resistance loads. When loaded externally with 50 Ω the LBSD detector can typically display 8 to 12 ns rise times. Figure 6 illustrates the equivalent circuit for the detector, as well as typical values for the diode impedance and the RF bypass capacitor.

Ordering Information

To add options to a product, use the following ordering scheme: Model: 847xB/C (x= 0, 2 or 3) Example options: 8472B–001, 8473C–001 423B–001 Matched pair of detectors 847xB/C–001 423B–002 External square-law load 847xB/C–002 Product specifications and descriptions in this document subject to change without notice. RF in 50 V Video outRF bypass capacitor Diode impedance Figure 7. Detector equivalent circuit please contact your local Agilent office. products and applications you select.