SEQ 1, Sequence Controller
max. 1 A • +12 ... 15 V DC
| Supply voltage | +12 ... 15 V DC |
| Control Output PA | max. 1 A |
| Control output for antenna relay | max. 1 A (switched to GND) |
| Switching delay | typ. 100 ... 150 ms |
Many coaxial relays have a too low isolation between the ports during the change-over. If the power amplifier (in a transmit-receive system) is switched too early, this may lead to damage or destruction of the input transistor in the preamplifier or converter.
With a sequence controller, this trouble can be avoided. The sequence controller provides a control signal for the coaxial relay and it switches the voltage supply for the power amplifier. There is a time delay between the two signals to guarantee safe switching.
With a sequence controller, this trouble can be avoided. The sequence controller provides a control signal for the coaxial relay and it switches the voltage supply for the power amplifier. There is a time delay between the two signals to guarantee safe switching.
- Control circuit for transmit-receive systems which use power amplifiers and coaxial relays
