Ericsson R96FT Spécifications télécharger pdf (Page 14)

19A705178

REV NO. TITLE

CONT ON SHEET

SH NO.

ROCKWELL MODEM TEST

SPECIFICATION/PURCHASE PART DRAWING

CONT ON SHEET SH NO. FIRST MADE FOR

F. C. F. O.

MADE BY

R Sager

APPROVALS

DCB

M. R. P. D.

DIV OR DEPT.

19A705178

ISSUED

Nov. 19, 1986

11-18-86

LYNCHBURG

LOCATION

CONT ON SHEET

SH NO.

REVISIONS

L30

PRINTS TO

Threshold Options

Four threshold options are provided:

1. Greater than -43 dBm (RLSD on)

Less than -48 dBm (RLSD off)

2. Greater than -33 dBm (RLSD on)

Less than -38 dBm (RLSD off)

3: Greater than -26 dBm (RLSD on)

Less than -31 dBm (RLSD off)

4. Greater than -16 dBm(RLSD on)

Less than -21 dBm (RLSD off)

NOTE

Performance may be at a reduced level when the

received signal is less than -43 dBm.

For CCITT configurations. a minimum hysteresis action of

2dB exists between the actual off-to-on and on-to-off

transition levels. The threshold levels and hysteresis action

are measured with unmodulated 2100 Hz tone applied to

the receiver’s audio signal input (RXA)

MODES OF OPERATION

The R96FT capable of being operated in either a serial or a

parallel mode of operation.

Serial Mode

The serial mode uses standard V.24 (RS-232-C

compatible) signals to transfer channel data. An optional

USRT device (shown in the Functional Interconnect

Diagram) illustrates this capability.

Parallel Mode

The R96FT has the capability of transferring channel Data

(up to eight bits at a time) via the microprocessor bus.

Mode Selection

For the transmitter, a control bit determines whether the

source of transmitted data is the V.24 interface (serial

mode) or the parallel transmitter data register (parallel

mode).The transmitter automatically defaults to three serial

mode at power-on.

The receiver simultaneously outputs received data via the

V.24 interface and he parallel receiver data register.

In either parallel or serial mode, the R96FT is configured

by the host processor via the microprocessor bus.

INTERFACE CRITERIA

The modem interface comprises both hardware and

software circuits. Hardware circuits are assigned to specific

pins in a 64-pin DlN connector. Software circuits are

assigned to specific bits in a 48-byte interface memory.

Hardware Circuits

Signal names and descriptions of the hardware circuits,

including the microprocessor interface, are listed in the

R96FT Hardware Circuits table. In the table, the column

titled "Type" refers to designations found in the Hardware

Circuit Characteristics. The microprocessor interface is

designed to be directly compatible with an 8080

microprocessor. With the addition of a few external logic

gates, it can be made compatible with 6500, 6800 or 68000

microprocessors.

R96FT Functional Interconnect Diagram

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 57 58

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