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
(7) Dual IEEE 1394 FireWire
®
1
Jacks
The FLEX-5000 has two 400 Mb/s 6-pin IEEE 1394 FireWire jacks. These are 1394a connections 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 either of these two jacks and connect the other end to
FLEX-5000A: your computer’s FireWire jack (the host controller).
FLEX-5000C: the computer jack marked “FireWire” in Figure 2 on page 6.
The second FireWire jack (7) can be used to “daisy chain” or extend the FireWire bus so that additional
IEEE 1394 FireWire devices may be connected.
CAUTION 1: Do not connect the second FireWire jack to a second PC. Only one PC
can be connected to the FLEX-5000.
CAUTION 2: 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-5000. 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).
Note 2: The FLEX-5000 FireWire controller does not supply voltage, so if you
are connecting a device “down stream” that normally receives power
from the FireWire cable you must supply external power to use that
device.
(8) Straight Key or Paddles (KEY)
For CW operation, the ¼” TRS KEY jack will accept a TRS plug for operating a keyer with paddles or a
TRS/TS plug for a straight key. The pin-out is shown in Table 3 below.
Table 3: Key Jack Pin-Out
Connector
Keyer
Signal
Straight
Key
Tip Dot Key
Ring Dash N/C
Sleeve Common Common
1
FireWire is a registered trademark of Apple, Inc.
8 2003-2008 FlexRadio Systems
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