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Interface of ground-base TT&C equipment for missile and spacecraft flight mission
1 Scope
1.1 Subject content
This standard specifies the requirements for the interface of ground-base TT&C equipment for missile and spacecraft flight mission.
1.2 Application scope
This standard is applicable to the demonstration, development, joint test and flight calibration of ground-base TT&C equipment for missile and spacecraft flight mission in China and connection and matching between ground-base TT&C equipment in flight test missions. Conventional weapons tests may also be carried out with reference to this standard.
2 Normative references
GB 3454-82 List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)
GB 6107-85 Interface between data terminal equipment and data circuit terminating equipment employing serial binary data interchange
GB 12057-89 General purpose 37-position and 9-position interface for data terminal equipment and data circuit-terminating equipment employing serial binary data interchange
3 Definitions
There is no provision in this clause.
4 General requirements
4.1 Connection environment for ground-base TT&C equipment
Ground-base TT&C equipment for missile or spacecraft tests shall be connected as shown in Figure 1. LIDAR remote equipment in the figure is short for optical measuring equipment, radar data measuring equipment, telemetry equipment and remote control equipment.
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4.2 Connection interface
4.2.1 Digital signal interface
Digital signal interface shall be used to connect data terminal equipment (DTE) and data circuit-terminating equipment (DCE) of TT&C equipment. In Figure 1, when LIDAR remote equipment is connected with a computer through communication equipment, the communication equipment is the DCE, and the computer and LIDAR remote equipment are the DTE; when the LIDAR remote equipment is directly connected with the computer, the former is the DCE and the latter is the DTE; when computers are directly connected with each other through digital signal interfaces, one of them is designated as the DCE. Equipment which is used sometimes as DTE and sometimes as DCE in different projects, the above two interface modes shall be provided.
According to the requirements of signal transmission rate and transmission distance, two interface circuit forms are specified as follows:
a. when the signal transmission rate is not more than 20kbit/s and the transmission distance is not more than 20m, unbalanced double-current circuit interfaces shall be adopted, and balanced double-current circuit interfaces may be adopted instead;
b. when the signal transmission rate is 20kbit~10Mbit/s or the transmission distance is 20m~1km, balanced double-current circuit interfaces shall be adopted.
Figure 1 Schematic diagram for connection of ground-base TT&C equipment
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4.2.2 Boot signal interface
The boot interface between the boot equipment and the LIDAR equipment shall be in two forms: digital interface and analog interface. The boot equipment shall have both of the above interface forms, and shall also have analog boot interfaces for both resolvers and synchronous machines. LIDAR remote equipment shall have digital boot interfaces, and generally shall also have analog boot interfaces. When an analog boot interface is used, it shall be for either resolvers or synchronous machines.
4.2.3 Time-frequency signal interface
Time-frequency signal interfaces shall be used to provide standard time and frequency signals for TT&C equipment.
4.2.3.1 Standard time signal interface form
4.2.3.1.1 IRIG-B (DC) interface
IRIG-B (DC) interfaces shall be preferred when the signal transmission distance is less than 200m. Twisted pairs shall be used for transmission channels.
4.2.3.1.2 IRIG-B (AC) interface
IRIG-B (AC) interfaces shall be used when the signal transmission distance is less than 50km. Audio channels shall be used as transmission channels.
4.2.3.2 Standard frequency signal interface
The 5MHz standard frequency signals shall be transmitted via the standard frequency signal interfaces. The transmission distance shall be less than 50m.
1 Scope
1.1 Subject content
1.2 Application scope
2 Normative references
3 Definitions
4 General requirements
4.1 Connection environment for ground-base TT&C equipment
4.2 Connection interface
4.2.1 Digital signal interface
4.2.2 Boot signal interface
4.2.3 Time-frequency signal interface
5 Detailed requirements
5.1 Digital signal interface
5.1.1 Interface circuits
5.1.2 Balanced double-current interface circuit
5.1.3 Unbalanced double-current interface circuit
5.2 Boot signal interface
5.2.1 Boot equipment end interface
5.2.2 Booted equipment end interface
5.3 Time-frequency signal interface
5.3.1 IRIG-B (DC) interface
5.3.2 IRIG-B (AC) interface
5.3.3 Standard frequency signal output interface
