4
MDS 1710A/C and MDS 2710A/C/D
MDS 05-3447A01, Rev. F
Continuously Keyed vs. Switched Carrier Operation
The keying behavior of the master station can be used to describe an
MAS system.
Continuously Keyed
operation means the master station transmitter is
always transmitting a carrier, even when there is no data to send. The
master station is always simultaneously transmitting and continuously
listening. Different frequencies must be used for transmit and receive.
NOTE:
MDS 1710/2710 radios do not support full-duplex operation.
Therefore, switched carrier mode must be set to ON (
SWC ON
).
Switched Carrier
operation is a half-duplex mode of operation where
the master station transmitter is keyed to send data and unkeyed to
receive.
Single Frequency (Simplex) Operation
Single frequency operation (also known as simplex) is a special case of
switched carrier operation. Single frequency operation is automatically
selected whenever the transmit and receive frequencies are set to the
same value. Note that data turn-around times are increased when a
single frequency configuration is used.
1.4 Product Configurator Codes
The full radio model number is printed on the radio enclosure. It pro-
vides key information about how the radio was configured when it was
originally shipped from the factory. See
Figure 4
for an explanation of
the configurator codes.
Invisible place holder
Figure 4. MDS 1710x/2710x Product Configurator Codes
THIS INFORMATION IS
SUBJECT TO
CHANGE.
DO NOT USE FOR
PRODUCT ORDERING.
1710A/C,
OPERATION
X= Base/Remote
MODE
N= Non-redundant
INPUT VOLTAGE
1= 10.5 to 16 VDC
MODEM
B= 9600 bps
DIAGNOSTICS
0= None
1= Network-wide
BANDWIDTH
1= 12.5 kHz
3= 25 kHz
FEATURES
0= Full
AGENCY
N= N/A
SAFETY
N= N/A
Mtg. Brackets.
A= Std.
B= None
5= 5 kHz
D= 3200 bps
0= None
C= 19200 bps
RX FRQ. (MHz)
A= 220-240**
A= 130-140
B=140-150
D= 150-165
E= 165-175
TX FRQ. (MHz)
1= 220-240**
2= 140-150
3= 150-165
D= Demo
C= China
F= FCC
I= Ind. Canada
(6.25 kHz @130-174)
2710A/C/D
4= 165-174
1= 130-140
** MDS 2710A/C Models
A= 220-222*
* MDS 2710D Models
1= 220-222*
