RA0SMS mini-whip
New RA0SMS mini-whip antenna on the roof. The old one lasted from 2017/02 to 2018/10.
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ONET1191P
ONET1191P, Limiting amplifier for up to 11 Gbps.
Korso MTB
Some MTB-trails in Korso today. Still some snow in places. Around 14km.
THS3491
THS3491 looks like an interesting op-amp for distribution amplifiers and in general for LF/HF work. However it turns out it is a bit finicky about the feedback resistors (high resistance values are stable but noisy, low values would give low noise but might be unstable). We're sticking with LMH6702 for now..
HMC394 2.2 GHz prescaler
HMC394 is a 2.2 GHz programmable prescaler (5-bit counter) with divide-ratios from /2 to /32.
SMA-to-SFP frequency stability
Some old plots from 2017 of the residual phase-noise at 10MHz when the signal is fed through an SMA-to-SFP board, SFP to optical, 2m optical fibre, then SFP back to electrical, and another SFP-to-SMA board. One version of the board is on github: https://github.com/aewallin/SFP2SMA_2018.03 As a comparison the noise-floor of the 3120A and a frequency … Continue reading SMA-to-SFP frequency stability
AD9912
DDS with 47-bit tuneable frequency word.
LFSCP-64-1EP footprint
AD CP-64-7 footprint using https://github.com/pointhi/kicad-footprint-generator
USB 2 hub
"industry grade" USB-hub containing FE2.1 USB hub chip.
AIM-TTi TF930 Frequency counter
We got a 350 eur AIM-TTi TF930 frequency counter for less demanding frequency counting. Here's how it looks like on the inside.