SwitchBox is a automatic T/R switch senses transmitted RF and switches your antenna from receive to transmit using a relay. It shorts your receiver antenna input to ground to protect your receiver. Instead of using RF sense to switch the antenna, a control line input lets your key/keyer or PTT line switch the antenna. Works on all modes -- CW, AM, SSB, FM, and digital modes.
Manual Mode
Connect the PTT control line of your transceiver to PTT RCA connector in SWITCH BOX rear panel. By grounding PTT, RTX input is connected to the antenna and TX AF IN in the front panel is connected to AF OUT. When RTX is connected to the antenna, RX input is grounded for better isolation. If PTT is open, the antenna is switched to RX output and AF OUT is connected to RX AF IN.
Automatic Mode
Don't connect PTT control line. When SWITCH BOX senses RF power in RTX input, it automatically switches RTX to antenna, otherwise the antenna is connected to RX.
Note: When SWITCH BOX is not powered, RTX is connected to the antenna to avoid transceiver damage.
Lightning Protection
ELAD SWITCH BOX provides gas discharge protection on the antenna input, this is a good solution but is not enough to ensure a complete protection for your system. Please refer to ELAD web site for more information about lightning protection.
● Impedance: 50Ω
● Frequency range: DC -160MHz
● Maximum TX power: 150W
● RF sense threshold: <10mW (1.8MHz - 30MHz)
● ON time < 20ms
● Release time: < 190ms
● Insertion loss: < 0.3dB @ 144MHz (0.2dB typical)
● RX isolation: > 38dB @ 144MHz (40dB typical)
● Gas discharge protection
● Power supply: 13.8V DC 200m
SwitchBOX è un' unità di commutazione del collegamento d'antenna tra un ricevitore ed un ricetrasmettitiore separati. Dotata di sensore RF permette l'uso di PERSEUS o FDM-S1 con un qualsiasi ricetrasmettirore HF in modo automatico e sicuro, inoltre, gestisce automaticamente i segnali audio provenienti dal ricevitore o dal monitor del trasmettitore.
Pannello frontale:
Presa Jack RX AF IN per l'input audio dal PC e LED VERDE indicante lo stato di RX.
Presa Jack AF OUT per l'output verso gli speakers o cuffie.
Presa Jack TX AF IN per l'input audio dal monitor delll'RTX e LED ROSSO indicante lo stato di TX.
Pannello posteriore
Connettore SO239 per il collegamento all'antenna
Connettore S0239 per il collegamento all'RTX
Connettore BNC per il collegamento al ricevitore
Presa RCA per comando ausiliario chiusura relays
Presa alimentazione 12V