the transmitter (transceiver) is connected here. Maximum power 2 W, usual power up to 1 W.
2.4 GHz output (max. 6 W) to the antenna (feed). Please ensure a VSWR of 1:1.5 or better.
Input for an external (e.g. GPS stabilized) reference frequency. See also F1/F2 and E. The level on the part of AMSAT-DL DownConverter here is 1Vpp for 40 MHz, but also applies to 10 MHz. Note that the reference input is terminated with 50 ohms.
Connection for the 12 V supply voltage. A voltage between 9 and 15 V with a load capacity of approx. 3 A is required. For example, a common 13.8 V station supply can be used.
6-pin header with the following pin assignment:
Two jumpers to select the transmit frequency of the connected transceiver (transmitter):
|transmit frequency of the trx||jumper 1||jumper 2|
D1, D2 and D3 form an input attenuator. See “Input attenuator”.
Solder bridge to select reference frequency.
Solder bridge to select internal/external reference.
LEDs 1,2 and 3: