Radyne ComStream SFC6400A, Инструкция по установке и эксплуатации

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SFC6400A/SFC1450A Synthesized Frequency Upconverter User Interfaces
TM106 – Rev. 1.1 4-23
To prevent data collisions from all the converters responding at once, each converter must be
software configured for ‘echo off’ in the Configuration Menu. If the converters are being linked to a
dumb terminal, the echo should be turned on locally.
4.4.1 ASCII Serial Protocol
The ASCII serial protocol serves as a ‘wrapper’ for the M&C data.
4.4.1.1 ASCII Command Structure
This serial command structure uses an ASCII character string format that enables serial control
through the use of a ‘dumb terminal.’ To differentiate a proper command string from noise, all serial
commands have a header followed by the specific command characters, followed by numeric values
where required, and are terminated by a character return <cr>. The basic command structure is as
follows:
@{Unit Address/}{Command}{Numerical Value(s)}<cr>
For the following examples, a unit address of 01 is assumed.
Refer to Appendix A for Remote ASCII Commends.
4.4.2 RLLP Serial Protocol
The Radyne ComStream Link Level Protocol (RLLP) is an alternative serial protocol used in
conjunction with the remote port.
4.4.2.1 RLLP Protocol Structure
When new fe atures are added to Radyne ComStream Corporation
equipment, the control parameters are appended to the end of the Non-
Volatile Section of the Remote Communications Specification, and status of
the features, if any, are added at the end of the Volatile Section. If a
remote M&C queries two pieces of Radyne ComStream Corporation
equipment with different revision software, they could respond with two
different sized packets. The remote M&C MUST make use of the non-
volatile count value to index to the start of the Volatile Section. If the
remote M&C is not aware of the newly added features to the product, it
should disregard the parameters at the end of the Non-Volatile Section and
index to the start of the Volatile Section.
Before creating any software based on the information contained in this
document, contact the Radyne ComStream Corporation Customer Service
Department (602-437-9620) to find out if the software revision for that piece
of equipment is current and that no new features have been added since
the release of this document.