Maxon ACC-513E, Техническое руководство

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Figure 5.2. Interface cable for data communication and radio control
5.2. Configuring the SD-170E
In case of mobitex application, which is an international and open standard for dedicated
wireless data for professional users, all timing is decided by recommendation of
network system. But, this radio does not use a specific network system. For this reason,
timing parameters will be tuned by the user to fit their own system realization.
5.2.1. Data Transmission (Tx)
If the SD-170E receives data from a DTE, the Master MCU of the SD-170E will get RF
stage to prepare for a transmission. In this case, proper timing is required to stabilize
the RF stage (ex. PLL lock time, Power-up time, and etc.). To prevent data loss,
inputted data will be saved in the internal memory, called a buffer, in the slave MCU of
the modem option board by the completion of the RF stabilization. The model contains
tunable value for this period of time, which the user can adjust these timings into their
system within the limited range. Especially, “Tx On delay” and “Tx Off delay” which are
important timing parameters in the transmitter. (see Figure 5.3.)
Tx On delay : The period of time for transmitter’s stabilization before the data is
processed for modulation.