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NEW
FOREST
ELECTRONICS |
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Breakout box model X21BOB |
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A comprehensive but easy to use
tool for testing and troubleshooting X.21 interfaces. A bank of 15 switches
allows any line to be opened or closed, the LEDs instantly show the state of the
incoming signals, any line can be patched to any other
using the jumper leads supplied.
(Technical note: X.21
is a specification for a communications interface that uses a DB-15 connector
and a set of six V.11 (RS-422) differential signals, each carried on two wires).
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- A fully featured, high
speed (10 Mb) X.21 test tool
- Monitors all X.21
signal lines, tests voltage levels and ground potential difference
- Self explanatory face
plate design for ease of use
- 15 slide switches, to
open or close any line
- The in-line LED monitors
to the left of the switches show the two signals from the DTE:- Transmit and Control
- The in-line LED monitors
to the right of the switches show the four signals from the DCE :- Receive, Indication, Signal
Element Timing and Byte Timing
- Four state monitoring of
signals: red = SPACE/ON, green = MARK/OFF, both = clock or data, neither =
no signal
- Patch any line to any
other line, or force signal levels, using the jumper leads supplied
- Monitor/trap facility
- Ground potential
difference test
- Two dual gender ribbon
cable adapters included, for connectivity in any type of DB-15
configuration
- Battery powered
(batteries included), or can be used with an external 9V supply
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X21BOB breakout box, two
dual gender ribbon cable adapters, set of jumper leads,
carrying pouch for everything supplied, instruction booklet, 12 months warranty,
lifetime support by phone or email
| Order code: X21BOB |
£249.00 + VAT (UK) |
We regret to say that
from 30th September 2010 this product is no longer available from our
supplier. We will update this page should the situation change. |
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X21BOB abbreviated
specification & additional information |
- Number of breakout switches:
15
- Number of probe
points/sockets: 30 (identified by the labelled LED monitors next to each
position)
- Total number of monitors (2
LEDs each): 7 in-line (including G.P.D. pair), 2 unassigned
- Monitors all active lines:-
2 & 9 (Transmit), 3 & 10 (Control), 4 & 11 (Receive), 5 & 12 (Indication), 6 &
13 (Signal Element Timing), 7 & 14 (Byte Timing)
- Four state monitoring: red =
SPACE/ON (A-B > +0.3V), green = MARK/OFF (A-B < -0.3V), both = data or clock,
neither = signal in transition region (-0.3V < A-B > +0.3V)
- Suitable for operation to
10Mb/s, LEDs do not dim with increasing speed, the threshold remains at 300mV
from DC to 10Mb/s
- One unassigned monitor/trap
for signal level and pulse detection, accessed
by patching jumper leads from required lines
- Signal simulation by
patching from voltage source sockets above the switches
- Interface connectors: One
gold plated female DB-15 type connector on the left-hand side of the box, one
male DB-15 connector on the right-hand side
- Two dual gender ribbon cable
adapters included, for connectivity in any type of DB-15 configuration
- Power: Isolated 1.5 volt AAA
cell (included) for balanced line LEDs, 9 volt battery (included) for general
operation (life over 20 hours). May also be powered by an external 9 volt
(stabilised, 100mA) mains adapter (not included)
- Dimensions: (WxHxD) 105 x
150 x 20 mm (4.1 x 5.9 x 0.8 inches)
- Weight: 295 g (10.4 oz)
- Temperature: operating = 0
to + 50 deg.C (32 to 122 deg.F)
- RoHS compliant, CE marked,
made in EU
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