Receive Clock; Receive Data; Data Set Ready; No Signal - Motorola DDS/MR64 Installation And Operation Manual

• Reception of 7 consecutive "Out-of-Service" characters
• Loss of signal.
When RLSD is off, Receive Data is held to a mark state.
Receive Clock RC
This signal goes on when the DDS/MR64 provides the DTE with
continuous timing information for clocking received data. The DTE
samples received data during the transition from space to mark of the

receive clock.

Receive Data RD
This signal goes on when the DDS/MR64 provides the DTE with data
received from the communications line. Transitions of this lead occur
within ± 25% of the nominal bit time. This signal is held in a mark state
when RLSD is off.
Data Set Ready DSR
This signal goes on when line and equipment conditions are all set for
data transfer. DSR must be on to transmit data and can be forced on
regardless of conditions.
Note
The behavior of DSR may depend on the status of the
System Status OPTion (SS OPT). Refer to System Status in
Chapter 4.

No Signal

This signal goes on when the DDS/MR64 cannot identify a signal from
the DDS line.

GROUNDING

Protective Ground

Protective/chassis ground is provided on the DTE interface connector.

Signal Ground

Signal ground provides a common reference for the interface signals.
An optional strap connection provides chassis ground.
NS
DDS/MR64
Operation
3-5