DRAKE R8A - Page 32

The receiver rear panel provides a common DB-9 con-
nector which conforms to the RS-232C serial data com-
munications standard with the receiver configured as
DCE. This connector may be attached to a basic dumb
ASCIl terminal or a personal computer such as an IBM XT/
AT running a terminal emulation program such as
PROCOMM PLUS™ or BITCOM"™. Standard BASIC terminal
programs will run equally well.
The interface provides complete control and program-
ming capability of the receiver. Only the analog controls
such as volume, RF gain, etc. are not controllable. The
receiver front panel buttons and tuning wheel are nor-
mally operable when the receiver is under computer
control. The buttons and tuning wheel can be locked out,
if desired, either by pressing the button sequence: [ * ],
LOCK function line button or by use of the ‘LO’ computer
command.
Please refer to FIGURE 17 for interface connector pin out.
Rear Panel View
INTERFACE
67 8 9
9 FAA Ko)
1 2 3 4 §
RS - 232C
Pin | Signal Description
1 Scan Feedback;
+5 Volts = Receiver
Unsquelched
Rx DATA
Tx DATA
No Connection
Ground
No Connection
No Connection
No Connection
Ground CON AGA WIND
FIGURE 17 RS232C Interface Connections
PROCOMM PLUS" is registered to DATASTORM
Technologies, Inc.
P.O. Box 1471
Columbia, MO 65205
BITCOM'™ is registered to BIT Software, Inc.
830 Hillview Court, Suite 160
Milpitas, CA 95035
RS232C Interface 30
NOTE:
The following additional items apply when using the
RS232C Interface capability of the receiver:
WARNING:
SHIELDED INTERFACE CABLES MUST BE USED WITH THIS
RECEIVER FOR FCC COMPLIANCE TO LIMITS FOR A CLASS
B DIGITAL DEVICE.
When interfacing the receiver to a computer utilizing a 25
pin male connector for the RS-232C serial port, the follow-
ing wiring convention should be followed:
Computer DB25
Connector
Receiver DB9
Connector
OONIOMAwWh —
N N NanoanS|y oo
Note: This equipment has been tested and found to
comply with the limits for a Class B digital device, pursuant
to Part 15 of the FCC rules, These limits are designed to
provide reasonable protection against harmful interfer-
ence in a residential installation. This equipment gener-
ates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the instruc-
tions, may cause harmful interference to radio communi-
cations. However, there is no guarantee that interfer-
ence will not occur in a particular installation. If this
equipment does cause harmful interference to radio or
television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the follow-
ing measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and
the receiver.
- Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV techni-
cian for help.