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6.1
Description
The skewed hybrid can only be used to connect a
transmitter and receiver(s) together, as it has too
much loss on the RX port for a transmitter to be
connected to this port. The back plate contains 3
female BNC connectors (TX, RX, and Line)
which are the only connections that need to be
made to the hybrid. If desired, a male BNC to
female UHF adapter accessory is available for
changing the output connector to UHF (See
Chapter 1). A gas tube protector is also located
across the Line coax connector to limit surge
energy coming into the hybrid.
6.2 Customer Interface Points
6.2.1 Jumpers
• JMP1 (RX Port) = High Z or Terminate.
Shipped setting = Terminate.
JMP1 is used to put a 50 Ω high power resistor
across the RX port for terminating high input
impedance receivers. When connecting to a circuit
that has receivers with an already existing 50 Ω
termination, then this jumper should be set to the
High Z position.
• JMP2 = Switch enable or disable.
Shipped setting = SW Enable.
JMP2 is used to enable or disable the front push-
button switch. For customers not desiring the
switch, it gives them a way of jumpering it out of
the circuit.
Chapter 6. Skewed Hybrid
Copyright © AMETEK Power Instruments
6.2.2 Test Points (Red)
• TX– For TX Coax connector
• RX– For RX Coax connector
• Common – This is the common for all the
test points
• Output – This is the Test Point before the in-
line pushbutton switch
• Line – This is the Test Point after the in-line
pushbutton switch. Electrically tied to the
Output Test Point unless the pushbutton
switch is pressed
6.2.3 Pushbutton Switch
NOTE: The pushbutton switch is recessed to
prevent accidental activation. Use a narrow tool
such as a pocket screwdriver to press it.
SW1 – This is a normally closed front panel push-
button switch that allows for an in-line reflected
power meter to be inserted between the Output
and Line test points when pressing this switch.
When using this switch, the in-line meter is
always inserted into the test points first, and then
the pushbutton is pressed for the measurement and
released before removing the meter.
This prevents loss of the carrier signal when
inserting the meter and therefore there is no need
to take the system out of service when properly
using this switch.
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