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Two Way Passive Splitter-Combiner

 
         
 

   
 

Standard version SO-239 connector option.
Size: 74x37x40mm (2.913x1.457x1.575in)

  Low profile version N connector option.
Size: 74x37x30mm (2.913x1.457x1.181in)
 
         
    Diagram  
  Low profile version BNC connector option.
Size: 74x37x30mm (2.913x1.457x1.181in)
  Two way Splitter-Combiner connection diagram.
(Click on picture to enlarge)
 
 

The two way passive Splitter-Combiner is an electronic device that performs two functions depending in the application.

Essentially it is a passive electronic network that provides one input/output common port and two independent input/output ports.
When a signal is applied to the common port and delivered thru the independent ports it is operating as a Splitter.
Conversely when signal is applied to the independent ports the combination of individual ones is added to the common port, it is operating as a Combiner.
Notice the Combiner is not a frequency mixer because its behaviour is linear and thus does not produce further frequency products.

Typical applications include either combining two antennas for one receiver, or if you have two receivers that you want to share on one antenna.

 

Wrong !   Right!

The antenna and each receiver have a 50Ω characteristic impedance. They can not be connected with a coaxial "T" connector ( a common misconception).
The reason is that the impedances at all connection points must be set at the correct 50Ω in order to avoid desensitisation, intermodulation distortion (IMD), and other undesirable effects due the resultant impedance mismatch. In the above left “T “wrong connection example the resultant impedance will be the parallel combination of all impedances connected to the “T” junction.

An important performance of the Antenna Splitter-Combiner is its Output1 to Output2 isolation in order to avoid coupling between receivers when you are sharing the same antenna. This is specially important on SDR receivers due their tendency to radiate back to the antenna spurious signals.

         
 

VLF- LF-MF-HF model features:

- Operating frequency: 4kHz to 60 MHz
- RF Power Rating: 1 Watt (Max)
- Impedance: 50 Ohms

- Insertion Loss (dB): Type Max.
 0.004 - 0.04 MHz:      0.3 0.6
 0.04 - 30 MHz:          0.3 0.6
 30 - 60 MHz:             0.6 1.0

- Isolation (dB): Type Min.
 0.004 - 0.04 MHz:      27 20
 0.04 - 30 MHz:          30 20
 30 - 60 MHz:             27 20

- Phase Unbalance:
- 0.004 - 0.04 MHz:      2.0 (Max)
- 0.04 - 30 MHz:          3.0 (Max)
- 30 - 60 MHz:             4.0 (Max)

- Amplitude Unbalance:
  0.004 - 0.04 MHz:      0.15 dB (Max)
 0.04 - 30 MHz:           0.25 dB (Max)
 30 - 60 MHz:              0.30 dB (Max)


 

LF-MF- HF-VHF-UHF model features:

- Operating Frequency: 100kHz to 450 MHz
- RF Power Rating: 1 Watt (Max)
- Impedance: 50 Ohms

- Insertion Loss (dB): Type Max.
 0.1 - 1 MHz:      0.2 0.6
 1 - 200 MHz:     0.4 0.75
 200 - 400 MHz: 0.6 1.0

- Isolation (dB): Type Min.
 0.1 - 1 MHz:      20 15
 1 - 200 MHz:     25 20
 200 - 400 MHz:  25 20

- Phase Unbalance:
 0.1 - 1 MHz:      2.0(Max)
 1 - 200 MHz:     3.0 (Max)
 200 - 400 MHz:  4.0 (Max)

- Amplitude Unbalance: 0.3 dB (Max)

 
 
     
 

Two Way Passive Splitter-Combiner options

 
  Model *Connectors Model Price Order  
             
 

VLF- LF-MF-HF
4kHz-60MHz

SO-239 SKU: HS-600VLF-SO £ 115.00  
             
  VLF- LF-MF-HF
4kHz-60MHz
BNC SKU: HS-600VLF-B £ 118.00 Order  
             
  VLF- LF-MF-HF
4kHz-60MHz
N SKU: HS-600VLF-N £ 130.00 Order  
             
  LF-MF- HF-VHF-UHF
100kHz-450MHz
SO-239 SKU: HS-601HF-SO £ 93.00 Order  
             
  LF-MF- HF-VHF-UHF
100kHz-450MHz
BNC SKU: HS-601HF-B £ 96.00 Order  
             
  LF-MF- HF-VHF-UHF
100kHz-450MHz
N SKU: HS-601HF-N £ 108.00 Order  
 

All models include:

Passive Splitter-Combiner and user manual in CDROM format.

* Other connector options available, please ask.

 
   

Antenna Splitter & By-Pass relay
         
     
         
 

The Antenna Splitter & By-Pass Relay combines any transceiver with any receiver sharing the same antenna, enabling simultaneous reception feature on both radios.

Simultaneous reception on any transceiver and any receiver sharing the same antenna.

If a SDR radio is used as secondary receiver you get Panoramic Spectrum reception/Transmission monitoring feature.

On transmission switch-over embeded protection circuitry avoids overloading the secondary receiver and internal components of the unit.

It brings new life to any older radio by adding advanced SDR features.

High performance, low insertion loss, telecommunication grade set of relays rated for RF power applications are used in order keep large isolation among ports and the nominal 50 Ohms impedance.

Two models are available depending on the range of frequency cover by the passive splitter device:

VLF- LF-MF-HF: 4kHz - 60MHz.

LF-MF- HF-VHF-UHF: 100kHz - 450MHz

 

 
 

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.

Remote Control

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 Limited disclaims all liability arising from this information and its use.

It is user responsibility to ensure that your application meets with specifications.

 

Connection diagram

 

 


User manual

Connection diagram.
(click to enlarge)

 

Antenna Splitter & By-Pass Relay. User manual.

Concept diagram

  Trans. monitoring

Conceptual diagram
(click to enlarge)

 

 

Transmission monitoring using a SDR secondary receiver. SSB tone.
(click to enlarge)

.

Splitter LF-MF- HF-VHF-UHF model features:

- Operating Frequency: 100kHz to 450 MHz
- RF Power Rating: 1 Watt (Max)
- Impedance: 50 Ohms

- Insertion Loss (dB): Type Max.
 0.1 - 1 MHz:      0.2 0.6
 1 - 200 MHz:     0.4 0.75
 200 - 400 MHz: 0.6 1.0

- Isolation (dB): Type Min.
 0.1 - 1 MHz:      20 15
 1 - 200 MHz:     25 20
 200 - 400 MHz:  25 20

- Phase Unbalance:
 0.1 - 1 MHz:      2.0(Max)
 1 - 200 MHz:     3.0 (Max)
 200 - 400 MHz:  4.0 (Max)

- Amplitude Unbalance: 0.3 dB (Max)

 General features:

- Frequency range:

    Model VLF- LF-MF-HF: 4kHz - 60MHz

    Model LF-MF- HF-VHF-UHF: 100kHz-450MHz

- Insertion loss Reception: 3dB
- Insertion loss Transmission: < 0.5dB
- RF Power rating Transmission: 100 W PP max.
- Impedance: 50 Ohms.
- Power Splitter device:
  VLF-LF-MF-HF: Mini-Circuits PSC-2-2+
  LF-MF-HF-VHF: Mini-circuits PSC-2-1+
- Relays switching time:
- Set: 5mS
- Reset: 4mS
- Activation port: Sink to ground (100mA max)
- Diode protection.
- Power supply: 11-15 Volts DC/60 mA (activated)
- Size: 73x110x40mm(2.87x4.33x1.57in)
- Connectors: SO-239 (LF) or N type (VHF) Antenna and Transceiver;
  BNC receiver output.
- Remote Control cable :
  Connector type: Foster 4 vias. Shielded control cable with snap-on
  RFI-EMI suppressor cores included.

 Combined type of connector configurations also available. Please ask.

Splitter VLF- LF-MF-HF model features:

- Operating frequency: 4kHz to 60 MHz
- RF Power Rating: 1 Watt (Max)
- Impedance: 50 Ohms

- Insertion Loss (dB): Type Max.
 0.004 - 0.04 MHz:      0.3 0.6
 0.04 - 30 MHz:          0.3 0.6
 30 - 60 MHz:             0.6 1.0

- Isolation (dB): Type Min.
 0.004 - 0.04 MHz:      27 20
 0.04 - 30 MHz:          30 20
 30 - 60 MHz:             27 20

- Phase Unbalance:
- 0.004 - 0.04 MHz:      2.0 (Max)
- 0.04 - 30 MHz:          3.0 (Max)
- 30 - 60 MHz:             4.0 (Max)

- Amplitude Unbalance:
  0.004 - 0.04 MHz:      0.15 dB (Max)
 0.04 - 30 MHz:           0.25 dB (Max)
 30 - 60 MHz:              0.30 dB (Max)

     
  Antenna Splitter & By-Pass relay options  
  Model *Connectors Model Price Order  
             
 

VLF- LF-MF-HF
4kHz-60MHz

SO-239-BNC SKU: HS-600RLY-VLF-SO £ 248.00 Order  
             
  VLF- LF-MF-HF
4kHz-60MHz
N-BNC SKU: HS-600RLY-VLF-N £ 259.00 Order  
             
  LF-MF- HF-VHF-UHF
100kHz-450MHz
SO-239-BNC SKU: HS-601RLY-HF-SO £ 225.00 Order  
             
  LF-MF- HF-VHF-UHF
100kHz-450MHz
N-BNC SKU: HS-601RLY-HF-N £ 236.00 Order  
 

All models include:

Antenna Splitter & By-Pass relay, user manual in CDROM format and EMI filter shielded remote control cable with connector.

* Other connector options available, please ask.

 
     


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