Antenna Splitter-By-Pass relay operation
The Antenna Splitter-By-Pass relay device is inserted between the antenna and a transceiver, a secondary receiver is connected to the corresponding port.
By default the Antenna Splitter-By-Pass relay device is in reception state enabling reception on both radios. When the transceiver transmit/receive switching (PTT or CW key) is pressed the RF outputs after some milliseconds delay time called “Peripheral-enable-to-RF output”.
This RF output delay time is used to give enough time to engage the internal relays of the Antenna Splitter & By-Pass Relay device before the RF power outputs the transceiver.The
delay time varies depending on the transceiver settings.
Some popular transceivers “Peripheral-enable-to-RF output” default delay time are as follows:
Kenwood TS-480/2000: 10ms
Yaesu FT-1000 MKV/Filed: 5ms
Yaesu FTDX-9000, FT-2000: 15ms
ICOM IC-706: 15ms
ICOM IC-7000: 10ms
Elecraft K3: 8ms
TenTec Orion/OmniVII: 15ms
TenTec OmniVII & Orion I/II: 15ms
To work with the Antenna Splitter & By-Pass relay we recommend to set the delay to 20-30ms. See owner manual settings of the particular transceiver in use.
An output enable SEND control signal from the transceiver is activate (type sink to ground) BEFORE the Peripheral-enable-to-RF output delay time starts.
The output enable SEND control signal is generally available on a service connector located on the rear panel of the radio.
Transceiver manufactures give different names to the output enable SEND control signal as SEND, DELAY, LINEAR AMPLIFIER, TX-GND, T/R-LINE, etc. See owner manual of the particular transceiver in use.
IMPORTANT WARNING TO AVOID DAMAGE
- Before apply RF power to the unit make sure that all connections are right and the device is powered.
- First test switching functionality without RF power.
- If the output enable SEND control signal is not connected or the Peripheral-enable-to-RF output delay time is to short the RF power coming from the transceiver will reach the device still in reception state (relays no engaged) damaging the internal splitter component and may be the secondary receiver.
- Check-up that the enable output SEND control signal from the transceiver in use is the default standard on most transceivers called “Closing to Ground”, “Sink to Ground”, “Sink Current”, or “Ground on Transmit” (denomination may vary).
- Some transceivers may output a non-standard “+12V” enable SEND control signal instead of the standard Closing to Ground “one. In this case the Antenna Splitter-By-Pass Relay device WILL NOT WORK.
- The maximum peak sink current to activate the Antenna Splitter & By-Pass relay device is 100mA. It is compatible with relay or solid-state, closure
to-ground, type of output ports.
Heros Technology Ltd disclaims all liability arising from this information and its use.
It is user responsibility to ensure that your application meets with specifications.