- #Rigol dsa815 tg vswr generator#
- #Rigol dsa815 tg vswr manual#
- #Rigol dsa815 tg vswr upgrade#
- #Rigol dsa815 tg vswr Pc#
#Rigol dsa815 tg vswr manual#
The procedure in the manual for aligning these was written at a time when sophisticated test equipment did not exist. The over-coupled 40MHz filter cannot be aligned without the use of a suitable wobbulator. Although I have encountered several cases where the actual filter response was significantly high in frequency.
Theoretically, the latter can be aligned (or re-aligned) simply by adjusting each trimmer for maximum reading on the front panel meter. The two key filters are the 40MHz filter on the output of the first mixer and the 37.5MHz filter on the output of the Harmonic Generator.
The RA17 series of receivers rely heavily on filters. Hence, why I invested in the Rigol DSA815-TG. The thought of having everything in a single box sounded so convenient. All this isn’t a problem, its just a little bit inconvenient.
#Rigol dsa815 tg vswr Pc#
There is also the need to have the VNWA disconnected from the PC at boot-up, otherwise it fails to boot … and the fact that the VNWA and the transfer-relay USB controller must always be plugged into specific USB ports, otherwise the VNWA is not detected. Since my VNWA has been ‘married’ to a transfer relay, effectively turning it into an s-parameter test-set, I have not one but two USB cables running half-way round the workshop between the PC and the VNWA. I have two monitors connected to this PC and one of those is strategically attached to the side of my test equipment rack. This is because since the VNWA is a USB device, it requires connection to a PC, which in my case is an old XP-based machine sitting under my desk at one end of the workshop. The DG8SAQ VNWA is quite tiny compared to the DSA815, yet implementing it into my test setup is not quite as convenient as the DSA815. Last things first, the 809-1 does not have the ability to set a reference level, thus all measurements are purely relative. So, with my DG8SAQ VNWA proving invaluable where the various filters in the RA17 were concerned, and the old Systron-Donner 809-1 continuing to give good service, just what was it about the DSA815 that was so appealing? Two things really: Convenience, and the ability to make direct power measurements. However, although recognising the truth in the statement, I never gave it much thought, since for the last 10 years, I have been using a DG8SAQ VNWA for aligning these filters, and others.
#Rigol dsa815 tg vswr generator#
Over the years, I have heard people refer to the combination of spectrum analyser and tracking generator as the way to go when tackling the 40MHz filter. But I do have a Racal SA97 wobbulator, which is actually more interesting than useable. The Rigol DSA815-TG (TG refers to the built-in Tracking Generator) was mentioned as a suitable modern alternative to the gargantuan Samwell & Hutton CT501, which I will add, I don't have. We had been discussing the test equipment that we each used for aligning the filters, in particular, the infamous 40MHz Band-Pass filter. This came about as a result of an email exchange with a fellow RA17 enthusiast. Given that my Systron-Donner didn’t cost me anything back in the early 80s, and the fact that I have recently resolved a frequency accuracy issue, what was my reasoning behind the new investment? The thing is, I already have a more than adequate, albeit old, Systron-Donner 809-1, which covers 10MHz right up to 12.4GHz in 5 switchable ranges. I recently invested in a new spectrum analyser, a Rigol DSA815-TG, to be precise. A low-cost Hand-Brake lever for Dirt Rally.Using the Rigol DSA815-TG to align filters in the RA17 series.Systron Donner Spectrum Analyzer Type 809-1 - Solving the Frequency Calibration Issue.Repairing a troublesome ProSisTel Rotator.Systron Donner Spectrum Analyzer Type 809-1 re-fit.Repairing a MKII Pye Black Box amplifier.S-Parameter Test Set for the SDR-Kits VNWA.
Rapco 1804P9 GPS Disciplined Precision Frequency Source.
#Rigol dsa815 tg vswr upgrade#
PLL Upgrade for DB6NT MK2 13cm Transverter.Systron Donner Spectrum Analyzer Type 809-1.A Microphone Pre-Amplifier for the T1154.Refurbishing a 1940's Air Ministry Headset.