GB/T 11318.9-1996 Cable distribution system equipment and components for television and sound signals Part 9: General specification for power supply equipment
Some standard content:
National Standard of the People's Republic of China
Equipment and components used in cabled distribution systems primarily intended for television and television signals
Part 9: Generic specifications of equipments for power supply1 Scope
GB/T 11318.9—1996
Replaces GB/T14948.11994
This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of power supply equipment (hereinafter referred to as equipment) in cabled distribution systems for television and sound signals of 5MHz to 1750MHz. This standard applies to power supply equipment in cabled distribution systems for television and sound signals of 5MHz to 1750MHz. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards. GB/T11318.1-1996 Cable distribution system equipment and components for television and sound signals Part 1: General specifications 3 Definitions
This standard adopts the following definitions. Other definitions should comply with the relevant provisions in GB/T11318.1. 3.1 Line power unit
In the cable distribution system, a device that converts 220V, 50Hz AC mains power into low-voltage AC power to supply power to remote amplifiers.
3.2 Power feed injector In the cable distribution system, a device that injects low-voltage AC power from the power supply into the coaxial cable used for signal transmission without basically affecting signal transmission.
3.3 Change rate of output voltage The change rate of output voltage refers to the relative change value of the output voltage of the power supply equipment with the specified input voltage and load current. 3.4 Short circuit current short circuit current Under the conditions of rated power frequency and rated input voltage, the output current value of the line power supply after the output terminal is short-circuited. 3.5 Transient recovery time transientrecoverytim When the input voltage suddenly changes from 80% of the rated value to 115%, or the load current suddenly changes from the rated value to zero, the time interval from the output voltage of the power supply leaving the regulated value for the first time to finally entering the regulated area. Approved by the State Administration of Technical Supervision on September 9, 1996 384
Implemented on May 1, 1997
4 Product classification
GB/T 11318.9—1996
4.1 DC regulated power supplies are divided into series regulated and switching regulated types due to different circuit programs. 4.2 Line power supplies can be divided into regulated and unregulated types; each type can be divided into indoor and outdoor types due to different working environments. Note: Some line power supplies also have the function of power plugs. 4.3 Power inserters are divided into Class 1 and Class II according to the working band. 5 Requirements
5.1 General requirements
The general requirements of the equipment shall comply with the provisions of 4.1.1 of GB/T11318.1-1996. 5.2 Performance parameters
5.2.1 The performance parameter requirements of the DC regulated power supply are shown in Table 1. Table 1
Input voltage (ac)
Output voltage
Rated value
Allowable deviation
Output voltage change rate
Rated output current
Ripple voltage
mV (peak value)
Note: The ripple voltage of the switching DC regulated power supply includes the peak value. 5.2.2
The performance parameter requirements of the line power supply are shown in Table 2. Table 2
Input voltage (ac,)
Output voltage
Rated value
Allowable deviation
Output voltage change rate
Rated output current (ac)
Short-circuit current
Transient recovery time
5.2.3 The performance parameter requirements of the power inserter are shown in Table 3. Unit
Performance parameter
Series type
(220+19)%
Switch type
(220+15)%
5, 6, 12, 18, 24
0.5, 1, 2, 5
Performance parameter
Unregulated type
(220±10)%
Regulated type
(22026）%| |tt||30, 42, 60
1, 2, 4.6, 10, 15
Specified in the product standard
Measurement method
Measurement method
Frequency range
Insertion loss
Reflection loss
Signal-to-noise ratio
Current carrying capacity
Maximum pass voltage
Note: Current carrying capacity refers to the pass value of each channel.
GB/T 11318. 9—1996
Performance parameters
5~300(450,550)
5 MHz~30 MHz: ≥12
47 MHz~~300(450,550) MHz:≥16≥66
2, 4, 6, 10, 15
65(50Hz)
47~230
470~800
Measurement method
5.2.4 For products with both power supply and power inserter functions, the performance parameter requirements shall comply with the provisions of Table 2 and Table 3. For products with both DC regulated power supply and power inserter functions, the performance parameter requirements shall comply with the provisions of Table 1 and Table 3. 5.3 Environmental adaptability
The environmental adaptability requirements of the equipment shall comply with the provisions of 4.3 of GB/T11318.1-1996. The test items after high temperature, constant humidity and heat, low temperature (outdoor type), sealing (outdoor type), sweep frequency vibration and collision tests are output voltage (DC regulated power supply and line power supply) and insertion loss (power inserter), and the results shall comply with the requirements of Tables 1 to 3 respectively. After low temperature or salt spray test and free fall test, the DC regulated power supply, line power supply and power inserter shall be tested for performance according to the items specified in Tables 1, 2 and 3 respectively, and the test results shall comply with the provisions of Tables 1 to 3. When the DC regulated power supply and line power supply are tested at high temperature and low temperature, intermediate tests shall be carried out, and the test items are output voltage, and the test results shall not exceed ±5% of the initial test value. 5.4 Reliability
The mean time between failures (MTBF)6 value of the DC regulated power supply shall not be less than 10000h. The mean time between failures (MTBF) of the line power supply and the power inserter shall not be less than 40,000 hours. The failure criteria are:
a) The output voltage of the DC regulated power supply changes by more than ±10%; b) The output voltage of the line power supply changes by more than ±10%; c) The insertion loss of the power inserter changes by more than 2dB after passing the specified safety voltage and current carrying capacity. 5.5 Safety
The safety requirements of the equipment shall comply with the provisions of 4.5 of GB/T11318.1-1996. The dielectric strength and insulation resistance of the power inserter are not specified.
5.6 Electromagnetic compatibility
The electromagnetic compatibility requirements of the equipment shall comply with the relevant provisions of 4.6 of GB/T11318.1-1996. 6 Test methods
6.1 General requirements
The test methods for the general requirements of the equipment shall be carried out in accordance with the relevant provisions of 4.1.2 of GB/T11318.1-1996. 6.2 Performance parameters
6.2.1 Output voltage and its rate of change
6.2.1.1 Measurement block diagram
The measurement block diagram is shown in Figure 1. The output voltage meter and ammeter are DC type when measuring DC regulated power supply; they are AC type when measuring power supply. 386
GB/T 11318.9--1996
Flow type (magnetoelectric instruments should not be used for voltage-stabilized power supplies). Input
Note: The oscilloscope is used to measure ripple voltage. At this time, the connection between the load, oscilloscope and the device under test should be as short as possible. Figure 1 Output voltage and its rate of change and ripple voltage measurement equipment connection 6. 2. 1. 2 Measurement
When the input voltage is the nominal value and the load current is the rated value, measure the rated output voltage U. . This value should be within the allowable deviation range. When the load current is the rated value, change the input voltage relative to the nominal value according to the specified positive and negative values (the grid frequency is 50Hz). After the output voltage reaches a steady state, measure the output voltage Uo1. When the load current is zero, repeat the above measurement. Calculate the relative change of the output voltage according to formula (1) and take the maximum value. 1AU. )(%)
Where: AU.=U. U;
Su——output voltage change rate.
6.2.2 Ripple voltage
6.2.2.1 Measurement block diagram
The measurement block diagram is shown in Figure 1.
6.2.2.2 Measurement
When the input voltage is nominal, the output voltage is rated, and the load current is rated and zero, observe the peak-to-peak value of the AC component superimposed on the output voltage on the oscilloscope. When the input voltage changes by a specified positive or negative amount relative to the nominal value (the grid frequency is 50Hz), repeat the above measurement and take the maximum value. When the ripple voltage does not contain a spike voltage, the bandwidth of the oscilloscope is not specified. When the ripple voltage contains a spike voltage, the bandwidth of the oscilloscope should be no less than 10 MHz.
6.2.3 Current carrying capacity
6.2.3.1 Measurement block diagram
The measurement block diagram is shown in Figure 2.
Tested inserter
6.2.3.2 Measurement
Figure 2 Equipment connection for current carrying capacity measurement
Select the RL value so that the tested inserter passes 1.5 times the current carrying capacity at the specified safety voltage. When current passes through both terminals of the inserter, the two RF terminals can be short-circuited as shown by the dotted lines in Figure 2 and then measured. At this time, the RL value should make the ammeter indicate 3 times the current carrying capacity. 387
GB/T 11318.9—1996
Adjust the output voltage of the voltage regulator so that the voltage meter and ammeter indications reach the specified values and last for 2 hours. After the power-on test, the insertion loss and reflection loss values of the tested device should be tested again and they should meet the requirements of Table 3. 6.2.4 Insertion loss and reflection loss
The measurement of insertion loss and reflection loss shall be carried out in accordance with the provisions of 4.2.2.2.1 and 4.2.2.2.5 of GB/T11318.1--1996.
6.2.5 Short-circuit current
6.2.5.1 Measurement block diagram
The measurement block diagram is shown in Figure 1.
6.2.5.2 Measurement
Adjust the input voltage to the nominal value (the grid frequency is 50Hz), and adjust the load resistance RL so that the load current is the rated value. Then, while keeping the input voltage unchanged, reduce R until short circuit occurs. At this time, the reading of the ammeter is the short-circuit current value. 6.2.6 Transient recovery time
6.2.6.1 Transient recovery time when input voltage steps 6.2.6.1.1 Measurement block diagram
The measurement block diagram is shown in Figure 3.
Current voltage
Measurement of power supply
In the connection diagram of the equipment for measuring the transient recovery time when the input voltage step occurs in Figure 3, B and B are both voltage regulators. S2 is a double-throw switch (connected as a single-pole double-throw switch for use). 6.2.6.1.2 Measurement
6-2.6.1.2.1 Close switch S2 to the working position a to short-circuit resistors R1 and R2, and then adjust the voltage regulator B1 so that the input voltage meter Vi indicates 115% of the rated value.
6.2.6.1.2.2 (S1 is in the open position), close switch S2 to the working position b. Adjust R so that the input voltage meter V1 indicates 80% of the rated value; after the adjustment is completed, measure the total resistance of resistors R1 and R1, and calculate the maximum loop current that may appear when switch S1 is turned on. This current should be less than the rated current of the voltage regulator Bz. 6.2.6.1.2.3 Turn on switch S1 and adjust the voltage regulator Bz so that the input voltage meter V indicates 80% of the rated value. 6.2.6.1.2.4 When switch S is on and the load current is at the rated value, toggle switch S2 to make the input voltage step back and forth from 80% to 115% of the rated value, and use a memory oscilloscope or other equipment with equivalent functions to measure the transient recovery time of the voltage. 6.2.6.2 Transient recovery time during load step 6.2.6.2.1 Measurement block diagram
The measurement block diagram is shown in Figure 4.
Measurement and supply cable
In the connection diagram of the transient recovery time measurement equipment during load step in Figure 4, B is a voltage regulator. S is a single-pole double-throw switch (connected as a single-pole single-throw switch for use). 388
6.2.6.2.2 Measurement
GB/T11318.9—1996
Close switch S, adjust voltage regulator B and load resistor Rt, make input voltage and load current both rated value. Then, turn switch S, make load current step back and forth from zero to rated value, use memory oscilloscope or other equipment with equivalent function to measure transient recovery time of output voltage.
6.2.7 Signal-to-noise ratio
Measurement of signal-to-noise ratio of equipment shall be carried out in accordance with the provisions of 4.2.2.2.11 of GB/T11318.1—1996. 6.3 Environmental adaptability
The environmental adaptability test method of equipment shall be carried out in accordance with the provisions of 4.3 of GB/T11318.1-1996. Test temperature group: Equipment working indoors is group I; equipment working outdoors is group II. 6.4 Reliability
The reliability test method of the equipment shall be carried out in accordance with the provisions of 4.4 of GB/T11318.1-1996, and the test plan shall be carried out in accordance with Plan 1. 6.5 Safety
The safety test method of the equipment shall be carried out in accordance with the provisions of 4.5 of GB/T11318.1-1996. 6.6 Electromagnetic compatibility
The electromagnetic compatibility test method of the equipment shall be carried out in accordance with the provisions of 4.6 of GB/T11318.1-1996. Inspection rules
The inspection rules of the equipment shall comply with the provisions of Chapter 5 of GB/T11318.1-1996. The acceptance inspection items of electrical performance parameters are shown in Table 4. Table 4
Inspection items
Insertion loss
Reflection loss
Output voltage
Output voltage change rate
DC regulated power supply
Note: △ in the table indicates acceptance inspection items. Marking, packaging, transportation and storage
Line power supply
Power inserter
The marking, packaging, transportation and storage of the equipment shall comply with the relevant provisions of Chapter 6 of GB/T11318.1-1996. 3895 times the current carrying capacity. When current passes through both terminals of the inserter, the two RF terminals can be short-circuited as shown by the dotted line in Figure 2 and then measured. At this time, the RL value should make the ammeter indicate 3 times the current carrying capacity. 387bzxZ.net
GB/T 11318.9—1996
Adjust the output voltage of the voltage regulator so that the voltage meter and ammeter indications reach the specified value and last for 2 hours. After the power-on test, the insertion loss and reflection loss values of the device under test should comply with the provisions of Table 3. 6.2.4 Insertion loss and reflection loss
The measurement of insertion loss and reflection loss shall be carried out in accordance with the provisions of 4.2.2.2.1 and 4.2.2.2.5 of GB/T11318.1--1996 respectively.
6.2.5 Short-circuit current
6.2.5.1 Measurement block diagram
The measurement block diagram is shown in Figure 1.
6.2.5.2 Measurement
Adjust the input voltage to the nominal value (grid frequency is 50Hz), and adjust the load resistance RL so that the load current is the rated value. Then, while keeping the input voltage unchanged, reduce R until short circuit occurs. At this time, the ammeter reading is the short circuit current value. 6.2.6 Transient recovery time
6.2.6.1 Transient recovery time when input voltage steps up 6.2.6.1.1 Measurement block diagram
The measurement block diagram is shown in Figure 3.
Current you voltage
Measurement power supply
In the connection diagram of Figure 3 Transient recovery time measurement equipment when input voltage steps up, B and B are both voltage regulators. S2 is a double-throw switch (connected as a single-pole double-throw switch for use). 6.2.6.1.2 Measurement
6-2.6.1.2.1 Close switch S2 to the working position a to short-circuit resistors R1 and R2. Then adjust the voltage regulator B1 so that the input voltage meter Vi indicates 115% of the rated value.
6.2.6.1.2.2 (S1 is in the open position) Close switch S2 to the working position b. Adjust R so that the input voltage meter V indicates 80% of the rated value; after the adjustment is completed, measure the total resistance of resistors R1 and R, and calculate the maximum loop current that may appear when switch S is turned on. This current should be less than the rated current of the voltage regulator Bz. 6.2.6.1.2.3 Turn on switch S1 and adjust the voltage regulator Bz so that the input voltage meter V indicates 80% of the rated value. 6.2.6.1.2.4 Switch S is in the on state. When the load current is the rated value, slide switch S2 to make the input voltage step back and forth from 80% to 115% of the rated value. Use a memory oscilloscope or other equipment with equivalent functions to measure the transient recovery time of the voltage. 6.2.6.2 Transient recovery time during load step 6.2.6.2.1 Measurement block diagram
The measurement block diagram is shown in Figure 4.
Measurement and supply cable
In the connection diagram of the transient recovery time measurement equipment during load step in Figure 4, B is a voltage regulator. S is a single-pole double-throw switch (connected as a single-pole single-throw switch for use). 388
6.2.6.2.2 Measurement
GB/T11318.9—1996
Close switch S, adjust the voltage regulator B and the load resistor Rt, so that the input voltage and load current are both rated values. Then, turn the switch S to make the load current step back and forth from zero to the rated value, and use a memory oscilloscope or other equipment with equivalent functions to measure the transient recovery time of the output voltage.
6.2.7 Signal-to-acoustic ratio
The measurement of the signal-to-acoustic ratio of the equipment shall be carried out in accordance with the provisions of 4.2.2.2.11 of GB/T11318.1-1996. 6.3 Environmental adaptability
The environmental adaptability test method of the equipment shall be carried out in accordance with the provisions of 4.3 of GB/T11318.1-1996. Test temperature group: indoor working equipment is group I; outdoor working equipment is group II. 6.4 Reliability
The reliability test method of the equipment shall be carried out in accordance with the provisions of 4.4 of GB/T11318.1-1996, and the test plan shall be carried out in accordance with plan 1. 6.5 Safety
The safety test method of the equipment shall be carried out in accordance with the provisions of 4.5 of GB/T11318.1-1996. 6.6 Electromagnetic compatibility
The electromagnetic compatibility test method of the equipment shall be carried out in accordance with the provisions of 4.6 of GB/T11318.1-1996. Inspection rules
The inspection rules of the equipment shall comply with the provisions of Chapter 5 of GB/T11318.1-1996. The acceptance inspection items of electrical performance parameters are shown in Table 4. Table 4
Inspection items
Insertion loss
Reflection loss
Output voltage
Output voltage change rate
DC regulated power supply
Note: △ in the table indicates acceptance inspection items. Marking, packaging, transportation and storage
Line power supply
Power inserter
The marking, packaging, transportation and storage of the equipment shall comply with the relevant provisions of Chapter 6 of GB/T11318.1-1996. 3895 times the current carrying capacity. When current passes through both terminals of the inserter, the two RF terminals can be short-circuited as shown by the dotted line in Figure 2 and then measured. At this time, the RL value should make the ammeter indicate 3 times the current carrying capacity. 387
GB/T 11318.9—1996
Adjust the output voltage of the voltage regulator so that the voltage meter and ammeter indications reach the specified value and last for 2 hours. After the power-on test, the insertion loss and reflection loss values of the device under test should comply with the provisions of Table 3. 6.2.4 Insertion loss and reflection loss
The measurement of insertion loss and reflection loss shall be carried out in accordance with the provisions of 4.2.2.2.1 and 4.2.2.2.5 of GB/T11318.1--1996 respectively.
6.2.5 Short-circuit current
6.2.5.1 Measurement block diagram
The measurement block diagram is shown in Figure 1.
6.2.5.2 Measurement
Adjust the input voltage to the nominal value (grid frequency is 50Hz), and adjust the load resistance RL so that the load current is the rated value. Then, while keeping the input voltage unchanged, reduce R until short circuit occurs. At this time, the ammeter reading is the short circuit current value. 6.2.6 Transient recovery time
6.2.6.1 Transient recovery time when input voltage steps up 6.2.6.1.1 Measurement block diagram
The measurement block diagram is shown in Figure 3.
Current you voltage
Measurement power supply
In the connection diagram of Figure 3 Transient recovery time measurement equipment when input voltage steps up, B and B are both voltage regulators. S2 is a double-throw switch (connected as a single-pole double-throw switch for use). 6.2.6.1.2 Measurement
6-2.6.1.2.1 Close switch S2 to the working position a to short-circuit resistors R1 and R2. Then adjust the voltage regulator B1 so that the input voltage meter Vi indicates 115% of the rated value.
6.2.6.1.2.2 (S1 is in the open position) Close switch S2 to the working position b. Adjust R so that the input voltage meter V indicates 80% of the rated value; after the adjustment is completed, measure the total resistance of resistors R1 and R, and calculate the maximum loop current that may appear when switch S is turned on. This current should be less than the rated current of the voltage regulator Bz. 6.2.6.1.2.3 Turn on switch S1 and adjust the voltage regulator Bz so that the input voltage meter V indicates 80% of the rated value. 6.2.6.1.2.4 Switch S is in the on state. When the load current is the rated value, slide switch S2 to make the input voltage step back and forth from 80% to 115% of the rated value. Use a memory oscilloscope or other equipment with equivalent functions to measure the transient recovery time of the voltage. 6.2.6.2 Transient recovery time during load step 6.2.6.2.1 Measurement block diagram
The measurement block diagram is shown in Figure 4.
Measurement and supply cable
In the connection diagram of the transient recovery time measurement equipment during load step in Figure 4, B is a voltage regulator. S is a single-pole double-throw switch (connected as a single-pole single-throw switch for use). 388
6.2.6.2.2 Measurement
GB/T11318.9—1996
Close switch S, adjust the voltage regulator B and the load resistor Rt, so that the input voltage and load current are both rated values. Then, turn the switch S to make the load current step back and forth from zero to the rated value, and use a memory oscilloscope or other equipment with equivalent functions to measure the transient recovery time of the output voltage.
6.2.7 Signal-to-acoustic ratio
The measurement of the signal-to-acoustic ratio of the equipment shall be carried out in accordance with the provisions of 4.2.2.2.11 of GB/T11318.1-1996. 6.3 Environmental adaptability
The environmental adaptability test method of the equipment shall be carried out in accordance with the provisions of 4.3 of GB/T11318.1-1996. Test temperature group: indoor working equipment is group I; outdoor working equipment is group II. 6.4 Reliability
The reliability test method of the equipment shall be carried out in accordance with the provisions of 4.4 of GB/T11318.1-1996, and the test plan shall be carried out in accordance with plan 1. 6.5 Safety
The safety test method of the equipment shall be carried out in accordance with the provisions of 4.5 of GB/T11318.1-1996. 6.6 Electromagnetic compatibility
The electromagnetic compatibility test method of the equipment shall be carried out in accordance with the provisions of 4.6 of GB/T11318.1-1996. Inspection rules
The inspection rules of the equipment shall comply with the provisions of Chapter 5 of GB/T11318.1-1996. The acceptance inspection items of electrical performance parameters are shown in Table 4. Table 4
Inspection items
Insertion loss
Reflection loss
Output voltage
Output voltage change rate
DC regulated power supply
Note: △ in the table indicates acceptance inspection items. Marking, packaging, transportation and storage
Line power supply
Power inserter
The marking, packaging, transportation and storage of the equipment shall comply with the relevant provisions of Chapter 6 of GB/T11318.1-1996. 3891-1996 in accordance with the provisions of 4.5. 6.6 Electromagnetic compatibility
The electromagnetic compatibility test method of the equipment shall be carried out in accordance with the provisions of 4.6 of GB/T11318.1-1996. Inspection rules
The inspection rules of the equipment shall comply with the provisions of Chapter 5 of GB/T11318.1-1996. The acceptance inspection items of electrical performance parameters are shown in Table 4. Table 4
Inspection items
Insertion loss
Reflection loss
Output voltage
Output voltage change rate
DC regulated power supply
Note: △ in the table indicates acceptance inspection items. Marking, packaging, transportation and storage
Line power supply
Power inserter
The marking, packaging, transportation and storage of the equipment shall comply with the relevant provisions of Chapter 6 of GB/T11318.1-1996. 3891-1996 in accordance with the provisions of 4.5. 6.6 Electromagnetic compatibility
The electromagnetic compatibility test method of the equipment shall be carried out in accordance with the provisions of 4.6 of GB/T11318.1-1996. Inspection rules
The inspection rules of the equipment shall comply with the provisions of Chapter 5 of GB/T11318.1-1996. The acceptance inspection items of electrical performance parameters are shown in Table 4. Table 4
Inspection items
Insertion loss
Reflection loss
Output voltage
Output voltage change rate
DC regulated power supply
Note: △ in the table indicates acceptance inspection items. Marking, packaging, transportation and storage
Line power supply
Power inserter
The marking, packaging, transportation and storage of the equipment shall comply with the relevant provisions of Chapter 6 of GB/T11318.1-1996. 389
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