- RAD Data Communications Installation and Operation Manual Short Range Modem ASMi-31

Chapter 1. Introduction ASMi-31 Installation and Operation Manual
1-6 Technical Specifications 16-03-00 15:51
Clock Source
Master Clock
Internal clock – The master clock uses its own
internal cr
y
stal when transmittin
g
or receivin
g
data from the DTE interface and from the line.
External clock – The master clock uses the
clock derived from the di
g
ital interface to
receive data from the DTE and for transmittin
g
data to the line.
If the di
g
ital interface is X.21, the same clock is
used to transmit and receive data.
Slave Clock
Loo
p
back timin
g
– The clock is recovered
from the line si
g
nal and used to transmit and
receive data from the DTE interface to the
line.
Control Signals
Jum
p
er-selectable:
•
RTS to DCD
•
DTR to DSR
Diagnostics
Loo
p
back Tests Remote Di
g
ital Loo
p
back – REM activated b
y
p
in in DTE interface su
pp
orted b
y
the
appropriate standard
Analo
g
Loo
p
back – Local (ANA defined b
y
the standard as LLB) activated b
y
p
in in DTE
interface su
pp
orted b
y
the a
pp
ro
p
riate
standard
Indicators
PWR (
g
reen) Power
RTS (
y
ellow) Re
q
uest To Send (Circuit 105)
TD (
y
ellow) Transmit Data (Circuit 103)
RD (
y
ellow) Receive Data (Circuit 104)
DCD (
y
ellow) Data Carrier Detect (Circuit 109)
LOS (red) Loss of si
g
nal
ERR (red) Error is detected in received confi
g
uration
information
TEST (red) A test is active
Power
AC Volta
g
e 115 VAC or 230 VAC (10%), 5W
Fre
q
uenc
y
50 or 60 Hz (47 to 63 Hz)
DC Volta
g
e -48 VDC (-36 to -72 VDC)
Power Fuses 0.1A, slow-blow for 230V
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