comparison: content/10MHz_ref_2.rst
content/10MHz_ref_2.rst
- changeset 115
- 6b6e13653348
- parent 43
- 4c3a05ba94de
- child 128
- aba381b2bac9
equal
deleted
inserted
replaced
| 114:33cd55d481ba | 115:6b6e13653348 |
|---|---|
| 15 them trying to solder it with my Weller WS50 iron). | 15 them trying to solder it with my Weller WS50 iron). |
| 16 | 16 |
| 17 Desoldering and soldering SMD parts without an air flow station is a | 17 Desoldering and soldering SMD parts without an air flow station is a |
| 18 bit tricky, but eventually I succeded in replacing the broken inductor. | 18 bit tricky, but eventually I succeded in replacing the broken inductor. |
| 19 | 19 |
| 20 .. image:: {filename}/images/freq_ref/extron_fixed.jpg | 20 .. image:: {static}/images/freq_ref/extron_fixed.jpg |
| 21 :alt: The Extron Video Distribution Amplifier fixed with a | 21 :alt: The Extron Video Distribution Amplifier fixed with a |
| 22 new inductor for its small DC-DC converter. | 22 new inductor for its small DC-DC converter. |
| 23 | 23 |
| 24 Now the "video" amplifier works like a charm. The 10MHz signal is | 24 Now the "video" amplifier works like a charm. The 10MHz signal is |
| 25 nicely amplified: | 25 nicely amplified: |
| 26 | 26 |
| 27 .. image:: {filename}/images/freq_ref/extron_working_10MHz.jpg | 27 .. image:: {static}/images/freq_ref/extron_working_10MHz.jpg |
| 28 :alt: The Extron Video Distribution Amplifier dispatching a | 28 :alt: The Extron Video Distribution Amplifier dispatching a |
| 29 10MHz signal to several equipments. | 29 10MHz signal to several equipments. |
| 30 | 30 |
| 31 At 10Mhz, the amplifier dephase the signal of about 20ns (ie. 72 | 31 At 10Mhz, the amplifier dephase the signal of about 20ns (ie. 72 |
| 32 deg). We can also note that (the input impedance of the Extron | 32 deg). We can also note that (the input impedance of the Extron |
| 33 amplifier is set to 75 ohm, while my scope is at 1 Mohm; I should try | 33 amplifier is set to 75 ohm, while my scope is at 1 Mohm; I should try |
| 34 using the input of my scope set at 50ohm) that the amplification | 34 using the input of my scope set at 50ohm) that the amplification |
| 35 factor is exactly x2. | 35 factor is exactly x2. |
| 36 | 36 |
| 37 .. image:: {filename}/images/freq_ref/extron_dephasing_10MHz.jpg | 37 .. image:: {static}/images/freq_ref/extron_dephasing_10MHz.jpg |
| 38 :alt: The Extron Video Distribution Amplifier dephasing at 10MHz. | 38 :alt: The Extron Video Distribution Amplifier dephasing at 10MHz. |
| 39 | 39 |
| 40 What I need to check carefully now is if all the outputs of the | 40 What I need to check carefully now is if all the outputs of the |
| 41 amplifier are perfectly in phase. | 41 amplifier are perfectly in phase. |
| 42 | 42 |
| 52 | 52 |
| 53 .. _FlyingHacker: http://www.eevblog.com/forum/profile/?u=110591 | 53 .. _FlyingHacker: http://www.eevblog.com/forum/profile/?u=110591 |
| 54 .. _`new thread on the EEVBlog`: http://www.eevblog.com/forum/projects/distribution-amp-%28for-reference-frequency-standard-or-otherwise%29/msg893851/ | 54 .. _`new thread on the EEVBlog`: http://www.eevblog.com/forum/projects/distribution-amp-%28for-reference-frequency-standard-or-otherwise%29/msg893851/ |
| 55 | 55 |
| 56 | 56 |
| 57 .. _`first part`: {filename}/10MHz_ref.rst | 57 .. _`first part`: {static}/10MHz_ref.rst |
