This article is going to take a closer look at the properties of a pseudo random bit sequence and a simple direct sequence spread spectrum signal both in the time- and frequency domain using the FFT capabilities of a Teledyne LeCroy WaveAce 1002. A while back, I posted an article about a Pseudorandom Number Generator […]
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Search Results for: low noise osc
Review: Jackson Labs GPSTCXO Eval Board
Jackson Labs offers several different precision timing solutions. Among them are various GPS-disciplined oscillators. They sent me an evaluation board for one of their ultra small, low-cost GPSDO. So let’s check it out! The GPS-disciplined Oscillator (GPSDO) reviewed in this article is a state-of-the-art eval board from Jackson labs equipped with a high-performance GPS receiver, […]
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Repairing a MRC DAR Plus Receiver
This is another piece of industry story time. This time it’s about Vislink MRC DAR Plus receivers and transmitters. It shows that even highly integrated devices in the 1 each including shipping. After carefully replacing the MMIC on the PCB, I tested the IF module by applying a 70 MHz signal again. This time the […]
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Crystal controlled listening device
There are tons of circuits for listening devices available on the internet. For the most part, they all have in common that they are virtually useless. This article shows how to build a reliable, small and inexpensive listening device using a PLL clock multiplier and a standard crystal. Most audio listening devices, also called spy […]
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Review: Abracon ABPSM-ULN-A – Precision Power Supply Module
When bench testing noise sensitive circuits, one needs an ultra clean power source. Low noise lab power supplies are usually bulky and expensive. Abracon challenges both the bulkiness and the expensiveness with their new low noise pocket sized ABPSM-ULN-A ultra low noise power supply module. With the ABPSM-ULN-A, Abracon intends to set a new standard […]
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Review: Abracon Sync’n Go – Portable Precision Frequency Reference
Most professional devices which require high accuracy and precision have an input for some sort of external frequency reference. The frequency 10 MHz is an industry standard particularly for test equipment. Most reference generators are designed for lab use and therefore are bulky and unsuitable for portable use. Abracon now offers a pocket-sized portable solution. […]
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C-Band DRO LNB Teardown
A low-noise block downconverter (LNB) is a key element in a satellite receiver system and is responsible for converting the relatively high frequency of the received signal into the more convenient L-Band. But how do they work and what do they look like on the inside? Let’s have a look! From a theoretical standpoint, a […]
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AOCJY1 series high stability OCXOs from Abracon
An Oven Controlled Crystal Oscillator (OCXO) is used wherever one needs a highly accurate and precise frequency reference. Abracon manufactures a series of affordable off-the-shelf OCXOs, which are due to their low price and outstanding performance particularly suitable for homebrew designs. Abracon’s AOCJY1 series offers various through-hole OCXOs with several possible frequencies between 10 MHz […]
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