DATA-LINC GROUP
31
DDAA1000/SRM User Guide
PN 161-09981-002C
rev 8/04
(5) RF Xmit Power
The DDAA1000/SRM offers users the ability to modify the Transmission Power of the radio modem. There are 10 power
settings available (1-10) which are roughly linear. Therefore a setting of 10 is full power (or 1 Watt) and 1 is 10% power
(or 100 mw). The following guidelines should be followed when setting the RF Transmission Power:
Table 6: Power Transmit Settings
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3
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4
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N
(6) Remote Security
With option 6 the user may disable the radio modem’s security so it will accept a call from any other DDAA1000/SRM.
The default setting is 0 where security is enforced (the caller’s call book number must be in the remote’s Call Book).
With a setting of 1 security is disabled.
As mentioned in mode 6, Remote Security must be set to 1 when the unit is operating in a point-to-point system where
it may need to accept calls from more than 10 different DDAA1000/SRMs. However, it is important to note that when
Remote Security is set to 1, the radio modem will accept calls from any other DDAA1000/SRM, and additional system
security measures should be taken to prevent unauthorized access.
(7) RTS to CTS
For DDAA1000/DD1000 use the user should not change this parameter. Leave it disabled (0).
(8) Retry Time Out
The Retry Time Out parameter allows the use to determine when a remote will drop a connection to a master or repeater
in multi-point mode. The default setting is 255, meaning that if one packet in 255 from the master is sent successfully to
the remote, it will maintain a link. The lowest setting is 8, at which a remote will drop a connection much faster.
The Retry Time Out parameter is useful when a multi-point system is used with a moving master or remotes. As the link
gets weaker, a lower setting will allow a remote to drop it’s link and search for a stronger connection.
While intended primarily for multi-point systems, the Retry Time Out parameter may also be modified in point-to-point
systems. In point-to-point mode the Retry Time Out should not be set to a value of less than 151.
