Black Box ME444AE-R3 Manual De Usuario
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CHAPTER 2: Introduction
2.2 Functional Description
This section describes the operation of the line driver’s circuit blocks, primarily the
circuits required for correctly configuring the modem (see Figure 2-1 below).
circuits required for correctly configuring the modem (see Figure 2-1 below).
Figure 2-1. Line driver block diagram.
2.2.1 E
NCODER
M
ODULATOR
The encoder modulator receives data from the DTE, then modulates the data
using the “conditional diphase modulation” technique. You can configure the
encoder to operate in one of three modes:
using the “conditional diphase modulation” technique. You can configure the
encoder to operate in one of three modes:
• 4-wire full-duplex (point-to-point)
• 4-wire half-duplex (point-to-point)
• 4-wire multipoint
The appropriate mode is determined by the setting of two jumpers: CARRIER (J2)
and RTS-CTS DLY (J4). For multipoint applications, two additional jumpers must
be set: XMT IMP (J13) and RCV IMP (J10). See Section 3.3 for a more detailed
explanation of the correct jumper settings.
and RTS-CTS DLY (J4). For multipoint applications, two additional jumpers must
be set: XMT IMP (J13) and RCV IMP (J10). See Section 3.3 for a more detailed
explanation of the correct jumper settings.