Motorola DDS/MR64, Инструкция по установке и эксплуатации

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Operation
3-4 DDS/MR64
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Note
Once RTS is raised by the DTE, the behavior of CTS may
depend on the status of the Circuit Assurance OPTion (CA
OPT). Refer to Circuit Assurance in Chapter 4.
Transmitter Clock TC
This signal goes on when the DDS/MR64 sends transmit timing infor-
mation to the DTE. The DDS/MR64 samples the transmit data during
the transition from space to mark of the transmitter clock. The time
between transition of the transmitter data line and the sampling transi-
tion of the transmitter clock must not be less than 25% of the nominal
bit time.
Transmit Data TD
This signal goes on when the DTE transmits data to the DDS/MR64.
External Clock
This signal goes on when the DTE sends transmit timing information to
the DDS/MR64. This option may be used in non-DDS applications or to
clock data into the buffer when the buffer option is enabled. When
external clock is used it must be within ± 0.1% of required frequency.
Received Line Signal Detector RLSD
Also known as Carrier Detect (CD). This signal goes on when the DDS/
MR64 is receiving a line signal that meets the requirements for data
transfer. RSLD is on when data is being received and can be forced on
regardless of line signals. RLSD goes off under any of these conditions:
•
Reception of 3 consecutive “IDLE” characters
Table 3-3. Normal CTS On Delay (Typical Values)
Data Rate RTS-CTS Delay (ms)
2400 bps 7.4
4800 bps 3.2
9600 bps 1.7
19.2 kbps 1.0
56 kbps 0.6
64 kbps 0.6