H A R D W A R E I N S T A L L A T I O N
C H A P T E R 1
(4) IEEE 1394 FireWire
®
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Jack
The FLEX-3000 has a 400 Mb/s 6-pin IEEE 1394 FireWire jack. This is a 1394a connection, not the
1394b (FireWire 800) type which run at 800 Mb/s. Connect the ferrite core end of the supplied 6-pin
FireWire cable to this jack and connect the other end to your computer’s FireWire jack (the host
controller).
WARNING! DO NOT FORCE THE FIREWIRE CONNECTOR IN UPSIDE
DOWN. DOING SO WILL DESTROY THE RADIO'S FIREWIRE
PORT.
CAUTION:
Do not remove the ferrite cores as they are required for CE
compliance and to minimize RFI at this ingress point.
Note 1:
Even though the 1394b standard is supposedly downward compatible
(9-pin to 6- or 4-pin cables are used), you should preferably only use
1394a host adapters to connect to the FLEX-3000. Please also refer
to the Knowledge Center article
Selecting High Performance FireWire
Cards for FlexRadio Transceivers
(search for
firewire card
in our
Knowledge Center at
http://kc.flex-radio.com/search.aspx
).
(5) PTT Jack
Connect to external hardware devices such as foot pedals or hand switches to key the rig. The
transmitter will be engaged when the center conductor is grounded.
(6) External Keying Line
This keying line, which can be given a delay, can be used to key an external device such as a linear
power amplifier or transverter.
The keying line uses an open collector Darlington transistor switch that is rated at 400mA, 50VDC
maximum. To ensure that your amplifier keying circuit does not damage the Darlington transistor
switch, it is safest (even for modern amplifiers) to insert the circuit shown in Figure 4 below between
the TX port and your amplifier.
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FireWire is a registered trademark of Apple, Inc.
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2003-2009 FlexRadio Systems
