Specifications

OPERATION:
Once you have configured each Mini Driver Card and connected the cables, you are ready to operate the units. This chapter describes the Card's LED's and the power-up procedure.
Status LED's:
The Mini Driver Card features nine front-panel status LED's (shown on the first page) that indicate the condition of the modem and the communication link.
The Card will steadily light its green "PWR" LED as long as it is receiving power through its mid-plane MicroRack connection.
The green "TD" and "RD" LED's blink to show positive-state data activity. The red "TD" and "RD" LED's blink to show negative-state data activity. If the red "TD" and "RD" LED's are steadily lit, the modem-to-modem connection for that unit is idle.
Power-Up:
There is no power switch on the Mini Driver Card: Power is automatically applied to the Card whenever--and for as long as-- its card-edge connector is plugged into the MicroRack's mid-plane socket and the MicroRack's power supply is turned on.
NOTE:
The Mini Driver Card is a "hot-swappable" card--it will not be
damaged by plugging it in or removing it while the rack is powered up.
XMT+ RCV+
XMT- RCV-
RCV+ XMT+
RCV- XMT-
CABLE CHARACTERISTICS
WIRE
GAUGE
CAPACITANCE RESISTANCE
19 AWG 83 nf/mi or 15.7 pf/ft. 16.3 ohm/1000 ft. (53.5 ohm/km)
22AWG 83 nf/mi or 15.7 pf/ft. 32.6 ohm/1000 ft. (107 ohm/km)
24 AWG 83 nf/mi or 15.7 pf/ft. 51.65 ohm/1000 ft. (169.5 ohm/km)
MAXIMUM CABLE DISTANCES (mi)
Data Rate
in (bps)
19 AWG 24 AWG
19,200
9,600
4,800
2,400
1,200
2.5 2.1 1.3
3.7 2.3 1.7
4.9 4.9 2.5
8.2 5.8 4.6
10 8.3 6.8
22 AWG