GE MDS SD Series Technical Manual page 59
Secure, long range ip/ethernet & serial wireless transceiver
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away and the radio keys again. The default selection is
time limit is reached).
•
TX Time-Out Delay (sec)
fline. The default time-out setting is 30 seconds.
•
— Determines whether or not the radio is configured to key (transmit) upon re-
Datakey
ceipt of payload data at its interface port. The default setting is
•
— Determines whether or not the radio is configured to key (transmit) upon re-
RTSkey
ceipt of an RTS (ready to send) signal at its interface port. The default setting is
•
Push-To-Talk Delay (ms)
which must expire before the radio is allowed to transmit. The allowable range is 0 to
255 ms, with the default being 0.
•
Clear-To-Send Delay (ms)
(ready-to-send) signal is received and when the CTS (clear-to-send) signal is returned.
The allowable range is 0 to 255 ms, and the default is 0.
•
Clear-To-Send Hold Delay (ms)
Mode. This sets the amount of time in milliseconds that the CTS remains present after the
last character of the RXD pin is transmitted. This 'hold time' can be used to prevent
squelch tail data corruption when communicating with other radios.
•
Automatic Freq. Correction
act the slight RF frequency drift that may occur over time or through wide swings of am-
bient temperature.
•
Switched Carrier (B Modems)
ly (Ckeyed), and transmits only when it has data to send to Remotes. This is known as
Switched Carrier operation. The Switched Carrier setting is only for use on radio mo-
dems with "B" suffixes (for compatibility with MDS x710 radios). In such networks, the
Remote radios should have the
which assumes B-modem operation with a continuously keyed Master. Ckey Opera-
OFF
tion only applies to Master units operating in full-duplex mode only. Master units in B-
modem networks will have SWC set to
•
RX Signal Attenuation
(typically -70 dBm or stronger). When enabled the radio will tolerate very strong signals
of -20 dBm or stronger. Note that RX Signal Attenuation will reduce sensitivity by a few
dB, so it should be disabled for maximum sensitivity when working with extremely weak
signals.
•
Force DCD to Asserted
nal. This setting allows the radio to be configured to provide a DCD signal without the
need for special cabling.
•
Modem Receive Tolerance
vanced feature to for backwards compatibility. Custom1 allows SDx to communicate
with legacy radios (i.e. 9790, 2100, x310) when running 9600B modem. Custom 2 allows
SDx to communicate with 2710N units running 9600M modem. This value should al-
ways be set to normal unless instructed to change it by GE MDS technical support for
specific applications.
MDS 05-4864A01, Rev. I
— Sets the time delay, after which a keyed transmitter is taken of-
— Allows programming a brief time delay after a keying event,
— Allows programming a brief time delay between when an RTS
— Used when the COM2 port is configured in CTS-Key
— Automatic Frequency Correction (AFC), is used to counter-
— In some networks, the Master unit is not keyed continuous-
Switched Carrier
ON
— This setting is intended for use in strong signal environments
— Some systems require a constant Data Carrier Detect (DCD) sig-
— Changes the receive tolerance of the modem. This is an ad-
SD Series Technical Manual
(transmitter shuts down when
ON
ON
setting turned
. The default setting is
ON
regardless of Ckey being on or off.
.
.
OFF
49
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