From 51ab9c3a359c64531bfdd38107293b9432893605 Mon Sep 17 00:00:00 2001 From: Peter Date: Wed, 9 Aug 2023 20:43:48 +0800 Subject: [PATCH] amend 2023-08-09 --- _posts/2023-08-09-Aliexpress-DC-block-characterization.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/_posts/2023-08-09-Aliexpress-DC-block-characterization.md b/_posts/2023-08-09-Aliexpress-DC-block-characterization.md index 6cdfcda..20b9af3 100644 --- a/_posts/2023-08-09-Aliexpress-DC-block-characterization.md +++ b/_posts/2023-08-09-Aliexpress-DC-block-characterization.md @@ -6,7 +6,7 @@ categories: [Electronics] # Blogging | Electronics | Programming | Mechanical tags: [rf, microwave, electronics] # systems | embedded | rf | microwave | electronics | solidworks | automation --- -I recently purchased [this DC block](https://www.aliexpress.com/item/1005002575850555.html) from Aliexpress to protect our HP 8560A spectrum analyzer. I did some basic tests on the DC block and it looks alright. +I recently purchased [this DC block](https://www.aliexpress.com/item/1005002575850555.html) from Aliexpress to protect our HP 8560A spectrum analyzer. I did some basic tests on the DC block and it looks good for the price. These N type DC blocks seem to be less common and twice as expensive than the SMA type, but I wanted to avoid using SMA hardware for my setup. ![DC block](/assets/img/2023-08-09-Aliexpress-DC-block/IMG20230809195538.jpg) @@ -18,4 +18,4 @@ The DC block performs well over the 1 MHz to 2.9 GHz frequency range. At 2.45 GH ![Performance near 0 Hz](/assets/img/2023-08-09-Aliexpress-DC-block/IMG20230809200758.jpg) -The -3 dB cutoff point is at ~850 kHz. The figure shows the performance from 300 kHz to 2 MHz (Note that the minimum frequency of the HP 8560A tracking generator is 300 kHz). So if you are using this block above 1 MHz, you should be fine. +The -3 dB cutoff point is at ~850 kHz. The figure shows the performance from 300 kHz to 2 MHz (Note that the minimum frequency of the HP 8560A tracking generator is 300 kHz). So if you are using this block above 3 MHz, you should be fine.