CAUTION

NOTE

Operating Information

Operating Information

The crystal detector can be used as a demodulator to obtain a pulse envelope which can then be observed on an oscilloscope. It can also be used as a general purpose detector.

•Static discharge can damage the detector element. A 100 pF capacitor (1.2 m [4 ft] of coax cable) charged to 14 volts stores .1 erg, the maximum pulse rating of the detector element.

•Connect cables to test equipment and discharge the center conductor before you connect to the detector.

•DO NOT NEEDLESSLY HANDLE THE DETECTOR ELEMENT USED IN CRYSTAL DETECTOR. Static electricity which builds up on a person, especially on a cold dry day, must never be allowed to discharge through the crystal detector.

•Avoid exposed leads to or from the crystal detector, since these are often touched accidentally.

The power applied to the detector can be either modulated or continuous wave (CW). If modulated at a 1000 Hz rate, a SWR meter can be used as an indicator. For CW detection, a dc milliammeter or millivoltmeter can be used as the indicator.

When using the crystal detector with an oscilloscope, and the waveshapes to be observed have rise times of less than 5μs, the coaxial cable connecting oscilloscope and detector should be as short as possible and shunted with a resistor.

Ideally, this resistor should be 50 Ω to terminate the coaxial cable properly. However, with 50 Ω resistance, the output video pulse may be too small to drive some oscilloscopes. Therefore, the cable should be shunted with the smallest value of resistance that will obtain suitable deflection on the oscilloscope; typically the value will lie between 50 Ω and 2 k Ω. The larger the resistance, the more degradation of rise time.

48472B Operating and Service Manual

Page 10 Page 12
Page 11
Image 11
Agilent Technologies 8472B service manual Operating Information
Page 10 Page 12

8472B specifications

Agilent Technologies 8472B is a high-performance microwave amplifier that has earned a reputation for reliability and precision in various applications including telecommunications, signal testing, and RF research. As a compact and versatile device, the 8472B combines cutting-edge technology with user-friendly functionality, making it a staple in many laboratories and test environments.

One of the standout features of the 8472B is its impressive frequency range. It operates effectively from 10 MHz to 20 GHz, which accommodates a wide array of microwave testing scenarios. This range ensures that it can handle both low and high-frequency signals, making it suitable for various applications, including wireless communication systems and radar testing.

The amplifier offers a nominal gain of 20 dB, with the ability to provide consistent performance across its frequency spectrum. This high gain factor is essential for amplifying weak signals without introducing significant noise, thus enhancing the quality of the transmitted signals. Additionally, the 8472B features a low noise figure, typically around 4 dB, which is crucial for maintaining signal integrity during amplification.

Another significant characteristic of the 8472B is its robust design, which includes overvoltage protection features. This makes the device resilient to unexpected voltage spikes, ensuring longevity and stability in diverse operating conditions. The amplifier also has a wide dynamic range, allowing it to perform well under varying signal conditions.

With respect to connectivity, the Agilent Technologies 8472B typically features 50-ohm connectors, which are standard in RF applications. Its compact form factor allows for easy integration into existing test setups, whether in a bench environment or within a larger instrumentation rack.

User-friendly features like an easily accessible control panel and clear indicators provide straightforward operation, facilitating quick adjustments and real-time monitoring. The 8472B also supports a variety of power supply configurations, giving users flexibility in incorporating it into their setups.

In conclusion, the Agilent Technologies 8472B microwave amplifier embodies the ideal blend of performance, durability, and versatility. Its frequency range, gain capabilities, low noise figure, and robust design make it an exceptional choice for engineers and researchers dealing with RF and microwave applications, cementing its status as a critical tool in the field.
Top Page Image Contents