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Data Line Monitor model V35LM

Description  

A simple to use tool for testing and troubleshooting high speed V.35 interfaces, the LEDs instantly show the state of all signals.

(Technical note: V.35 is a specification for a communications interface that uses an M/34 connector, and a set of five balanced (differential) (V.35) signals for data and clocks, and nine unbalanced (V.28) signals for control lines)

Product  
  • A complete V.35 line monitor for speeds up to 10Mb/s
  • Monitors all fourteen V.35 signals
  • Six in-line LED monitors show the signals from the DTE
  • Eight in-line LED monitors show the signals from the DCE
  • Four state monitoring of signals - MARK / SPACE / CLOCKING / NONE
  • Interface connectors: One gold plated female M/34 type connector, one gold plated male M/34 type connector
  • Interface or battery powered
What's included  

V35LM data line monitor, nine volt battery, carrying pouch, instruction booklet, 12 months warranty, lifetime support by phone or email

Order code:  V35LM:   We regret we can no longer supply this item  
     
Need something more comprehensive? Click here to learn about our V35 breakout box  
     
V35LM abbreviated specification & additional information
  • Six in-line LED monitors show the signals from the DTE - 2 balanced and 4 unbalanced (see table below)
  • Eight in-line LED monitors show the signals from the DCE - 3 balanced and 5 unbalanced (see table below)
  • (a) Differential (balanced) lines(V.35):- 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)
  • (b) Unbalanced lines (V.28):- red = ON (> +3V above signal ground), green = OFF (< -3V relative to signal ground), both = data or clock, neither = signal in transition region (-3V < Vs < +3V)
  • Speeds: Differential (balanced) up to 10Mb/s, un-balanced up to 500Kb/s
  • All 34 lines are wired through the unit
  • Suitable for operation to 10Mb/s, LEDs do not dim with increasing speed, the thresholds remain constant from DC to 10Mb/s
  • Interface connectors: One female M/34 (ISO-2593) type connector, one male M/34 connector
  • Power: interface power is sufficient for most situations (the power LED indicates the strength of the of the power available), battery powering is possible for extremely weak interfaces. One 9V PP3 size battery (included) lasts for over 100 hours
  • Housed in a rigid ABS case
  • Temperature: operating 0 to + 50 deg.C,   storage: -25 to + 70deg.C
  • RoHS compliant. CE marked, made in EU

V.35 pin assignments as implemented on the V35LM Data Line Monitor

Pin No. Abbr. Description Source CCITT
A
B
C
D
E
F
H
J
K
L
b
FG
SG
RTS
CTS
DSR
RLSD (DCD)
DTR
RI
LT
TP
RL
Frame Ground
Signal Ground
Request To Send
Clear To Send
Data Set Ready
Received Line Signal Detection
Data Terminal Ready
Ring Indicator
Local Test
Test Pattern
Remote Loopback
-
-
-->
-
-
-
-->
-
-->
-
-->
-
-
DTE
DCE
DCE
DCE
DTE
DCE
DTE
DCE
DTE
-
-
-
<--
<--
<--
-
<--
-
<--
-
101
102
105
106
107
109
108.2
125
141
142
140
A B
SD
RD
SCTE
SCR
SCT

Send Data
Receive Data
Serial Clock Transmit Ext.
Serial Clock Receive
Serial Clock Transmit

-->
-
-->
-
-

DTE
DCE
DTE
DCE
DCE

-
<--
-
<--
<--

103
104
113
115
114
P
R
U
V
Y
S
T
W
X
a

                       New Forest Electronics Tel. +44 (0) 1425 650089                 Issue 3.87    23rd April 2021