RD-2
TD-2
RD-1
TD-1
PWR
PWR
RTS
TD
RD
DCD
Cable Required: Between ME760A units: Unloaded twisted pair, 19 to 26
gauge; 4-wires for full duplex, at least 2 wires for half-duplex; DC
continuity not required;
Between ME760A unit and DTE: EIA RS-232 cable with DB25
male connector on ME760A end.
Interface: Serial EIA RS-232D/CCITT V.24, DCE; RTS/CTS delay 0,8 or
64 ms (user-selectable).
Protocol: Synchronous or Asynchronous
Clock Source: Either internal, external from local DTE, or recovered from
remote DTE.
Data Format: 5, 6, 7 or 8 data bits; 1, 1.5, or 2 stop bits; even, odd,
or no parity.
Operation: 2- or 4-wire half-duplex or 4-wire full-duplex; point-to-point or
multipoint.
Data Rate: Sync: 1.2, 2.4, 3.6, 4.8, 7.2, 9.6, 14.4, or 19.2 Kbps;
Async: Up to 19.2 Kbps.
Modulation: Differential diphase Eurocom Standard D1
Transmit Level: 0, -3, -6, or -9 dBm (user-selectable).
Transmit Impedance: 600, 300, 150 or "LOW" ohms (user-selectable).
Receive Impedance: 150, 300, 600 or "HIGH" ohms (user-selectable).
Return Loss: Greater than 15 dB.
Carrier: Controlled by RTS or constantly ON (user-selectable).
BLACK BOX
ME760AE
TEST
LDM-MR 19.2
DIG
ANA
REM
XMT RCV GND
DIG
ANA
REM
DB25 CONNECTOR
EN
DIS
ENABLE /
DISABLE
SWITCHES
2 W
4 W
2/4 WIRE
CARRIER
CTRL
ON
AGC
CTRL
ON
1 2 3 4
ON
XMT TIMING
ASY LENGTH
INT. CLK
EXT. CLK
RCV. CLK
ASYNC
CTS DELAY
0 msec
8 msec
64 msec
XMT IMPD
600
300
150
LOW
RPF
ON
OFF
PIN 18
AN. LP
EN
DIS
EN
DIS
PIN 21
(RLB)
XMT LEVEL
0 dbm
-3 dbm
-6 dbm
-9 dbm
RCV IMPD
150
300
600
HIGH
2
DATA RATE
SELECTION
PWR
RTS
TD
RD
DCD
TEST
User Controls: (21) Total: (3) Front-mounted pushbuttons:
DIG (local digital loopback)
ANA (local analog loopback)
REM (remote digital loopback)
(18) Internal:
(1) Dial: Data Rate;
(5) Single-position DIP switches:
(1) Enable/Disable front-panel pushbuttons;
(1) Async character length;
(1) Not used:
(12) Jumpers:
Transmit Timing; 2- or 4-wire operation;
CTS Delay; Carrier Control; Transmit Level;
Transmit-line Impedance; Receive-line
Impedance; Enable/Disable analog-loopback
command on Pin 18; Enable/Disable remote-
loopback command on Pin 21; Connect/
Disconnect signal ground and chassis ground
AGC control; Activate/Deactivate V.54 delay.
Diagnostics: Comply with V.54 standard:
Local analog loopback, mechanically or electrical user-controllable;
Local digital loopback, mechanically user-controllable;
Remote digital loopback, mechanically or electrically user-controllable.
Indicators: (6) Front-mounted LED's: PWR, RTS, TD, RD, DCD, TEST.
Connectors: (2) Rear-mounted: (1) DB25 for cable to DTE, (1) 4-wire terminal
block for modem-to-modem line.
Power: Directly from outlet through attached 5-ft. (1.5m) line cord:
ME760A: 230 VAC, 47 to 63 Hz, 3 watts.
SPECIFICATIONS:
