H-field pre-amplifier PCB 16.x
original source1)
The H-field pre-amplifier board PCB 16.x has the following THT components whose placement is obvious.
| image | count | part | note |
|---|---|---|---|
 | 1 | Header 3-pin, Pitch 3.5mm | |
 | 1 | Header 6-pin, Pitch 3.5mm | (or alternatively 2 x Header 3-pin, Pitch 3.5mm) |
 | 1 | RJ45 Modular Connector | |
The antennas are connected to the pre-amplifier as shown above.
| Signals from left to right: | ||||||||
| A-1 | A-2 | GND | B-1 | B-2 | GND | C-1 | C-2 | GND |
| This corresponds in the Status page of the web interface of System BLUE to | ||||||||
| Amplifier 1 - H0, Channel A | Amplifier 1 - H0, Channel B | Amplifier 1 - H0, Channel C | ||||||
| This corresponds in the Settings page of the web interface of System BLUE to | ||||||||
| Amp 1, Channel A | Amp 1, Channel B | Amp 1, Channel C | ||||||
| This corresponds in the Signals page of the web interface of System BLUE to | ||||||||
| Channel 1A, red signal | Channel 1B, green signal | Channel 1C, yellow signal | ||||||
The H-field pre-amplifier is connected with a shielded twisted pair cable (FTP, STP, S/STP, or S/FTP) to the main board. This cable should not be placed next to the network cable. Please keep a distance of at least 10 cm. The cable may have a length of up to 30 meters.
If you use loop antennas, than you should close (solder) the jumper for the corresponding channels at the back side of the board.
If the pre-amplifier is powered, the red LED should light.
1)
Documentation System BLUE, chapter 2.2.2