- #Rigol dsa815 tg bpbr tuning generator#
- #Rigol dsa815 tg bpbr tuning portable#
- #Rigol dsa815 tg bpbr tuning tv#
Watch an alternate video from the same location taken in 2010 with an omnidirectional antenna and showing an analog Canadian TV station on CH38 for comparison. The fading issue appears to be more pronounced and regular during the warmer months, and particularly regular over open-water paths as shown in the video.Ĭlick HERE to watch at YouTube (just under 2 minutes) The paths of the signals shown do include a 30 mile section of open water at the northern part of Lake Huron at the Straits of Mackinac, but I have viewed this phenomenon over 50 mile entirely non-water paths too.
Every sweep of the analyzer depicts different signal levels- of signals that one might expect to be stable (and are stable during most conditions). Watch a short video clip showing a sweep from CH29 to CH36 UHF TV during a period of active selective fading. Adaptive equalization in digital receivers helps phenomenally, but still, nature tends to win the battle in practice. With 8VSB ATSC DTV signals, the viewer won't see any change until the fading is severe enough to cause intermittent pixilation or periods of entire signal dropout. In NTSC analog UHF TV, it might be noticed by a critical viewer as irregularities in the image sharpness and brightness. Selective fading at UHF is a natural phenomenon that hadn't been readily noticed with analog signals, but with wide bandwidth digital signals, the fading is easily observed and quite detrimental to the signal. Similarly, when you're viewing a 6MHz wide swath up around 600MHz, chunks of the channel can change phenomenally in less than a second. You would figure that two frequencies 170hz apart at 3.8MHz wouldn't exhibit wildly different path loss, but at times they do. Many ham radio operators who have enjoyed operating 80 meter RTTY will attest, it's amazing how propagation can differ across even a tiny change in frequency due to a phenomenon called selective fading. Right: A portion of the UHF TV spectrum during a band opening in August of 2011 taken from an antenna 500' up a tower in the eastern UP of Michigan. Various directional couplers, bridges, etcĪssorted Audio measuring and generating devicesĢ0# sledge or Bosch demolition hammer for the stubborn issuesĪbove Top: Fond memories from the analog TV days, a Harris VHF transmitter just prior to scrapping.Ībove Lower: Our freshly restored Polarad URM-84A Vietnam-era 10MHz to 63GHz spectrum analyzer meets a local IBOC FM station (right side of trace) for the first time. Trimble Thunderbolt GPS reference receiver
#Rigol dsa815 tg bpbr tuning generator#
Hewlett Packard 8672A Microwave Signal Generator Hewlett Packard 5342A Microwave Frequency Counter
#Rigol dsa815 tg bpbr tuning portable#
Of the measurement equipment available are:Īgilent 89441V 8VSB/QAM analyzer & RT SpecAnalyzerĪgilent N9923A FieldFox portable network analyzer w/CAT We have reference antennas for 0.5MHz through 3GHz enabling accurate harmonic measurements in the field.
Our tools include the devices needed to do AM, FM and TV (8VSB digital) performance measurements. (Including adjacent channel power, occupied bandwidth, C/N ratio, averaging, CCDF, harmonics, spurious, etc).Ĭoaxial cable sweeping and fault location (lines up to 3 1/8"), antenna sweeps and tuning, RF cavity and filter tuning. Spectrum analysis with various modern techniques and filtering up to 18GHz. Return Loss (or SWR) measurements up to 18GHz.įrequency measurements traceable to NIST via GPS up to 18GHz. Our capabilities include network analysis from 2MHz to 6GHz (with basic impedance measurements down to 100kHz). This is the DSA815-TG which does include the tracking generator which is required for tuning duplexers etc.We specialize in radio frequency measurements from 100kHz up to 18GHz. * Please note the standard DSA815 does not include a tracking generator. Rigol DSA815-TG is the Tracking Generator Version which can be used for tuning duplexers etc. The DSA815-TG distinguishes between signals with a frequency difference as little as 10 Hz. The spectrum analyser offers the ability to measure smaller signals using our digital IF filter, which allows for smaller bandwidth settings and reduces displayed noise levels. The DSA815-TG features a widescreen display, compact design, and easy-to-use interface making it ideal for bench-top or field apps in RF and wireless testing and production. Rigol's DSA815-TG spectrum analysers redefine the product category by setting new standards for performance and price.
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