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This type of RF Box allows adding any two-port device (one R and one A port) which needs some kind of control
from SMD to the setup . Typical two-port devices are: multi-band Band Pass Filter (BPF with band switching
control), Low Noise Preamplifier (LNA with sequenced bypass during TX), Power Amplifiers (PA with keying or
automatic band switching control) etc ...
There are three sub-categories with predefined templates by purpose and type of control.
First is a FRQ type which generally stands for all two-port devices with relay control based on frequency.
BAND PASS FILTER (FReQuency type)
When the RF Box is added to the list, three sub-
tabs are generated: Interconnections, Rules and
1.FRQ. Number one in front of means that the
control box is linked to the first (and in this case
only) R port of the RF box. This allows identifying
control boxes for RF boxes which have more
than one R port.
The Interconnections tab specifies to which RF
box the A port is connected. The R port is
connected to an A port on the previous RF Box.
The Rules tab specifies the frequency range of
the R port along with other advanced settings
(described later because they are related to the
other forms of control). However, can be used
with FRQ control if needed as well.
The details of the third tab vary depending on
control box type, in this case it is a relay unit of
FRQ type.
FRQ control allows a control box to be configured/used to control an RF box based on operating or transmit
frequency. This is generally used for band selection.
CONTROL BOX
•
Specifies which control box will be used for this RF box control. The control box must be a relay unit with
exactly same number of relay outputs as the Output count. Only control boxes with the proper number of
relay outputs will be shown in drop down menu.
Output count
•
Specifies how many control wires are needed to control the RF box (maximum 20). For more than 10
outputs available in a single uLINK RELAY 10, the master/slave method must be used.
Switching delay
•
For safe band or transmit/receive antenna switching, SMD must know how long it takes for the switch to
activate and settle. SMD inhibits transmission for this period after each relevant change. This value can
be set individually for each control box/RF box. For all microHAM antenna switches the default 26 ms is
a safe time. If you are using switches from another manufacturer, contact the manufacturer or distributor
for the appropriate value.
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RF BOX CATEGORIES – Two-port device
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