submit

Golovna

Price 3 kopecks.

NATIONAL STANDARD

SPILKI RSR

STICK CI DATA TRANSMISSION SYSTEMS

CONTROL PARAMETERS

GOST 25007-81

Officially seen

STATE COMMITTEE OF THE USSR FOR STANDARDS

UDC 621.391: 681.3: 006.354 Group P85

NATIONAL standard SPILKI RSR

STICK C1 DATA TRANSMISSION SYSTEM

Receipt parameters

Interface Cl systems of data transmission.

Parameters at the interface

Resolution of the State Committee of the USSR for standards on the 24th leaf fall of 1981. No. 5097 terminology inserted

z 01/01/1983 until 01.01 1988 r-

Failure to comply with the standard will be reinvestigated according to the law.

1. This standard is expanded to the C1 stick between the signal conversion device (SMD) of the data transmission system and transmission systems with the frequency range of channels.

The standard installs parameters for receiving the UPS on the C1 stick with voice frequency (VF) channels of the Unified Automated Interconnection, output TC channels, as well as output pre-group (PG) and primary wideband channels (BC) of transmission systems with frequency division channels c.

2. The UPS, regardless of the warehouse (type) of the terminal ADF, must be connected to the connection channels according to the standard C1 stick, which is routed between the UPS and the connection channel at the transmission outputs of the UPS and the receiving inputs of the UPS.

3. It is necessary to assign the following values ​​to the C1 linkage channel: for channels ТЧ-Cl-ТЧ, for channels ШК-С1-ШК.

4. Exchange of Cl-PM and Cl-ShK sticks is carried out using modulated signals in a working mix of channel frequencies.

5. Nomenclature of Lanczyg Stick C1: linear output;

line input;

Linear input-output (in cases where the bi-wire circuits are switched on).

Officially seen ★

Peredruk fenced © Vydavnitstvo standartіv, 1982

6. The lances of the C1 stick must be symmetrical and galvanically isolated so that the lances are grounded.

11. The air conditioning system and the associated lancet stick must be installed in such a way that it does not cause damage in the idle mode at the output of the air conditioning system.

12. Housings of the connecting rod of the faulty mother are reliably electrically connected to the housing of the external equipment and external grounding.

13. Stick S1-TC

13.1.

Parameters of a pair of devices for mixing signals with switched PM channels

13.1.1.

The switching channel TC is given to the subscriber behind the double-wire switching circuit.

In special systems, in order to facilitate the transmission of data, the switched channels are supplied using a four-wire switching circuit.

13.1.2.

The level of average strength of signals at the output of the UPS transmission is set carefully when the subscriber line is turned off in such a way that at the point of zero input level of the TC channel the average strength of the signal for 1 minute does not exceed m minus 13 dBmO (50 μWO) and for 1 year did not exceed minus 1 (32 µWO).

13.1.3.

The permissible output level of the average voltage of the UPS for 1 cycle for operation via output channels is not required to exceed minus 10 dBmO (100 μWO).

13.1.4.

The average strength of signals at the input of the ZPS receiver is due to range from minus 43 to 0 dB.

13.2.2.

The level of average strength of signals at the transmission output of the UPS is set carefully after extinguishing the successful line in such a way that at the point of zero flow level to the PM channel this level does not exceed: for transmission speeds up to 2400 bit/s inclusive minus 15 dBmO (32 μWO) i 1 year, for transmission speeds higher than 2400 bit/s - minus 13 dBmO (50 µW) for 1 half and during the period of greatest demand with the coefficient of the vicor channel, which is more expensive than 0.6 - minus 15 dBmO ( 32 μWO) for 1 year.

The permissible level of average pressure for 1 hour of operation on the output channels of the connection should not exceed minus 10 dBmO (100 μWO).

You may be guilty of any kind of work regime of the ZPS.

13.2.3.

The level of maximum signal strength of the UPS is due to exceed minus 10.8 dBmO (80 μWO) at the point of zero input level at the input of the PM channel.

For home channels PM-minus 8.2 dBmO (150 μWO).

13.2.4.

The nominal input and output supports of the UPS must be increased to 600 Ohm.

The ratio of the input and output supports of the UPS in relation to the nominal signal in the operating frequency range does not exceed 15% for two-wire and 20% for four-wire switching circuits.

13.2.5.

The average strength of signals at the input of the ZPS receiver is due to range from minus 26 to 0 dB.

On the control panel, it is allowed to set the lower level to minus 30 dB.

14. Stick S1-ShK

14.1.4.

When the pre-group wide-area channels are selected with average transmission levels at the connection points equal to 24.3 dB, the UPS signal is subject to shaping in such a way that the average strength of the signal for 1 cycle is equal to 3 kg tz, centered on any frequency in 1 ,8 to 9.9 kHz or from 25.8 to 58.5 kHz, which did not exceed minus 43.8 dBmO, which indicates minus 68.1 dB at the input of the wide channel.

14.1.5.

The information transmitted to the ZPS must be processed in such a way that the energy of the data transmission signals in the frequency range from 11.4 to 12.3 kHz and from 23.4 to 24.3 kHz in a mixture of 100 G ts was lower than the values:

maximum - minus 17.4 dBmO (18.3 μWO).

14.1.6.

The nominal input and output support of the UPS is 600 Ohm.-

The ratio between the input and output supports in relation to the nominal signal in the operating frequency range does not exceed 15%.

14.2.

Parameters for obtaining devices for converting signals with the primary primary wide-angle communication channels.

14.2.1.

The lower frequency of the working signal of the primary wide-smooth channel is 60.6 kHz, the upper one is 107.7 kHz.

The mix of frequencies of the primary channel has a group control frequency (CC) of 84.14 kHz and frequencies located near the CF have possible bursts of extinction in the frequency range of 83.7-84.6 kHz and bursts of group hour increase in the range of 82-8 6 kHz.

maximum - minus 17.4 dBmO (18.3 μWO) at the point of zero input level.

14.2.5.

In the first wide-angle channel, in addition to the main data transmission channel, it is allowed, in addition to the frequency subdivision, to create an additional channel for the transmission of service signals, the formation of which may be included in the UPS.

14.2.6.

The permissible average voltage for 1 work period for the service channel connection is minus 15 dBmO (32 μWO).

It is allowed to increase the pressure on the service channel behind the head, so that the total pressure on the signal at the output of the transmission of the ZPS does not exceed the value indicated in paragraphs.

14.2.2,

14.2.7.

The nominal input and output supports of the UPS are 150 Ohms.

The ratio between the input and output supports in relation to the nominal signal in the operating frequency range does not exceed 10%.

Group P85

Change No. 1 GOST 25007-81 Stick CI data transmission system.

Receipt parameters

By decree of the State Committee of the SRSR for standards dated June 26, 1985 No. 1930, the entry line was inserted

The name of the standard in the new edition is: “Stack of transmission equipment with channels linking transmission systems with the frequency range of the channels.

Basic parameters obtained

Data transmission interface with communication channel transmission frequency separation system.

Basic parameters for the interface."

3.1 3 The permissible output level of the average voltage of the ZPS for operation via output channels is no more than minus 10 dBmO (100 μWO)

(Prodovzhennya bm. p. 348)

When working with combined channels, which include sections of the home and back-of-house borders, the satisfaction of equal signals can be ensured.”

Add clause 13.1.6 with the following note: “Note.

With a double-wire circuit, the output value of the support is ensured by connecting the DC voltage.<3.1.6. Входное сопротивление УПС постоянному току должно составлять не более 300 Ом при токе 215 мА.

The target's strum is not to overextend 40 1mA.”

Clauses 13.1.6, 113.1.7, iL3.2.1 (-13.2.3 and the new edition: “G.

13.1.7.

The input support of the stationary pump in the set mode: for a position that indicates “short-circuiting”, it must become no more than 300 Ohms at a flow of 2!5 mA;

for a position that suggests “rozmicaniya”, it is not necessary to be less than 100 kOhm.

I13.2J1L Non-switched TC channels are provided to the subscriber using several or two-wire switching circuits.

13.2.2.

The level of average strength of signals at the output of the UPS transmission. In any mode, robots must be installed in order to ensure that the signal line is extinguished in such a way that at the point of zero reference level to the PM channel this level does not exceed minus 13 dBmO (50 μWO).

Failure to set the required transmission level may fall within the range = 1" dB.<14.1.6 исключить.

Note.

When the group path is moved, the average signal strength of minus 1&dBmO (32 μWO) is allowed.

"13.2.3. The permissible output level of the average voltage of the ZPS for operation via the output channels of the connection is no more than minus 10 dBmO (ІІ µWO).

When working with combined channels, which include sections of the home and backwater levels, the same signals can be ensured.”*

Clause 13.2.5.

Replace the words: “For the sake of the deputy” with “For the sake of the deputy.”

14M212.

The level of average strength of the signal at the point of the zero level of the wide-smooth channel can become minus 4.3 dBmO (3i84 imkBtO).

(Prodovzhennya div. p. 350)

When operating along the output channels, the connection and connecting lines are given the ability to set the average pressure level *0 dBmO (1GOO µWO)"

Clause 14 2 3 disable.

Paragraphs 1142 4, 14 26 in the new edition “14 24 Reorganization of the information that is transmitted is carried out in such a way that the average strength of the data transmission signals near the group control frequencies f IC is at the point of zero The reference level was lower than the current value minus 70 dBmO - in the range ±25 (Hz, minus 30 dBmO - in the f K range ± "100 Hz, minus 15 dBmO - in the f K range - 200 Hz

Signal shaping in designated frequency ranges must be ensured entirely with channel-forming equipment

14 26 The permissible level of average voltage for the service channel connection is minus 15 dBm O (32 μWO)"

(IVD No. 10 1985 r)

Editor V. P. Ogurtsov Technical editor N. P. Zamolodshkova Corrector A. G. Starostin

Built in embankment

11/30/81 Pidl, in oven, 12/22/81 0.5 d.a.

0.30 academic-vid.

l.

Shooting gallery

12000 Price 3 kopecks.

Order "Sign of Poshan" Type of standards.

123557, Moscow, Novopresnensky prov., 3 Type.

"Moscow Drukar".

Moscow, Lyalin prov., 6. Zak.

1566

On the C1-I stick, the “1” input information sequence is represented by a pulse 10 or 01, which is inverse to up to the forward pulse.

In other words, this code is valid, similar to what is used in OFM.

Exact coding allows us to solve the problem of the insignificance of the bipulse phase on the primary side.As a result, the C1-I stick is not afraid of damages such as “mirror technique”, or “reversal robot” (inversion of signs) and reversal of contacts of a physical line or roses that are victorious.

Algorithm No. 1 (3 wiki capture block)

The implementation of this algorithm is based on the additional modification of the pulse value of the observed signal.

With the use of microcontroller functions, the least resource-efficient way is to use the storage unit,

What is the memory of the doctor’s attitude at the time of the guilt of the external world, which means the hour of his guilt.

The external signal appears as below/under.

The algorithm will be based on dividing the input signal into two types of pulses: long and short.

The choice of type is determined by the alignment of the selected pulse with the standard for a given speed (the ratio of the frequency of the quartz oscillator to the speed of the signal that is received) for a long and short pulse.

Under the long term there are two impulses of equal strength, under the short one there is one.

The main problem with this method is the number of equal impulses of the same type.

Load

- An additional change must be made to ensure the fluidity of the signal, which ensures the accuracy of inaccurate adjustment of the number of cycles of the impulse.

Small

1. 1. Illustration of the algorithm.

2. Literature

3. Bulatov V.M.

Elements and units of information and core systems (Fundamentals of theory and synthesis): Basic handbook.

It is allowed to increase the pressure on the service channel behind the head, so that the total pressure on the signal at the output of the transmission of the ZPS does not exceed the value indicated in paragraphs.

- Orenburg: GOU VPO ODU, 2002. - 200 p.

GOST 23633-79.

Sticks in data transmission systems [Text]: terms and meaning.

- Moscow: State Committee of the USSR for Standards, 1979. - 28 p.
GOST 27232-87.

Stick of data transmission equipment with physical lines [Text]: basic parameters.

- Moscow: State Committee of the USSR for Standards, 1987. - 8 p.
GOST 27232-87
______________________________
NATIONAL STANDARD OF SPILKI RSR
STICK DATA TRANSMISSION EQUIPMENT WITH PHYSICAL LINES
Basic parameters
Interface of data transmission equipment with physical lines.

Basic parameters

OKP 66531

Line no. 01.01.88

until 01/01/93 *

* The term has been removed

for the Interstate Radio protocol


from standardization, metrology and certification

(IVD No. 2, 1993 rіk).

- Note "CODE"

INFORMATION DATA

1. VIKONAVTSI:

B.P.Kalmikov, Ph.D.

tech.

sciences (kerivnik tem);

E.A. Kolganov;

5. The exchange of data signals to the S1-FO stick during asynchronous transmission is subject to bipolar forces of a steady stream in the primary code (low-level signals) at speeds up to 19200 bps.

The time-hour diagram of the data signal and similar to the low-level signal is shown in Fig. 2.

Devil.2

6. The exchange of data signals to the S1-FO stick during synchronous transmission is subject to bipolar forces with excessive conversion into a pulsed signal in the speed range from 1200 to 144000 bps, at information transfer speeds at least 144000 bit/s - three quasi-ternary signal with shortened signals I'm trying my best.

The algorithm for converting the data signal into a quasi-ternary signal is subject to the following rules: with each further transmission to the symbol “1”, the polarity of the pulse of the converted signal is changed to be equal to the forward pulse.

The symbol "0" is transmitted by skipping to the converted signal.

The time-hour diagram of the data signal similar to the quasi-ternary signal (QTS) is shown in Fig. 3.

Devil.3

The duration of a single data signal interval;

- signal amplitude

7. The algorithm for converting the data signal into a bipulse signal follows the following rules: the symbols “0” and “1” are transmitted to the data signal at a clock interval in two pulses of equal value and opposite polarity.

The order of polarity of pulses against the forward clock interval does not change at the hour of transmission to the symbol "1" and changes at the hour of transmission to the symbol "0".

Devil.3

The time-hour diagram of the data signal and the similar bipulse signal is shown in Fig. 4.

Damn.4

8. As an additional method of encoding the output sequence of double symbols in the speed range from 1200 to 480000 bps, it is allowed to use the Miller code.

9. The algorithm for converting a data signal into a signal in the Miller code follows the following rules: the transition from one level to another occurs in the center of a single interval, corresponding to the symbol "1", and at the end of a single interval, Similar to the symbol "0", only that In the case of the attack, the symbol is also “0”.

Devil.3

The time-hour diagram of the data signal and the corresponding signal in the Miller code is shown in Fig. 5.

________________
* It is allowed to discriminate between the signal spectrum and the frequencies at the same time:

6 kHz – at speeds 1200-2400 bbit/s;

24 kHz – on speeds 4800-9600 bbit/s;

120 kHz – at speed 48000 bps.

** Parameters are only verified based on the direct waveform of the signal.

*** The parameters are different for a quasi-ternary signal.

Note.



Frequency values ​​(), Hz, numerically high data transmission speed, bit/s, for a pulseless signal and a signal in the Miller code and half of the transmission speed for a low level signal and CTS;
- The duration of a single data signal interval.
Text of the document for:

Officially seen

M: Publishing House of Standards, 1987

Principles of using air-blast and PD systems

Sticks, protocols, interfaces

- The method of connection to the communication line (channel) determines the efficiency of the corresponding channel, as well as the telecommunication transmission system as a whole. Before devices are connected to the line, the connection is low according to the standards and parameters of TU and DSTU, as well as MCE recommendations.

For this type of channel, the optimal transmission method must be ensured:

For example

To facilitate a discrete signal with a non-interruptible channel, it is necessary to create a reconstitution of the spectrum in the UPS, in the way of its transfer (spectrum of the checkpoint) from the spectrum of the CTCH, using an additional non-continuous (collision) frequency f in. Modulating parameters of non-specific frequencies (amplitude, frequency, phase) can be transmitted to the device (0 and 1).

Re-creation structure

This principle is used in various modems: AM, ChS, FM.

- The method of connection to the communication line (channel) determines the efficiency of the corresponding channel, as well as the telecommunication transmission system as a whole. If a digital channel is selected for transmission, a pulse signal is transmitted along it.

In this case, a special encoding of the signal is often used, which is transmitted or combined with a pulse carrier. The end peripheral devices of the input output (UVV) or (ADF) of the telecommunication system are connected to the line of channels behind the additional unified interfaces to the output.

The interaction between various elements (nodes) of the system is supported by – Sticks, protocols and interfaces. Interface they are called the devices of receipt, and in the worst case - aggregation

electrical, mechanical and software features , which allows different devices to connect with each other. Tobto.

The interface defines the rules and physical implementation between nodes. Warehouse parts of the interface:

Hardware and software features with a protocol that describes the procedure for the interaction of modules (nodes) when exchanging data.

Hardware features – are created from the interface nodes, connections, service elements and line connections.

Hardware specifies the mechanical and electrical characteristics of the interface.

Mechanical power - types of roses. Electrical characteristics – signal parameters.

Software features

Sequential introduction of a system that transmits and receives information sequentially (sequential transmission method).

For the connection method to the PVR separate:

The interfaces are individual (for radial connection ІРПР – “radial interface for parallel transmission” and ІРПС – “radial interface for serial transmission”).

Buttstock BIS K580VV55 and K580VV51;

Groups (for trunk connection - fire bus interface). Butt – system data bus. Pid physical interface

- Understand the totality of unified buses, connectors, electronic circuits that control the transmitted signal.

Which type of interface is called?

stick. Currently, the concept of the per-unit structure of the system (channel) for data transmission with a hardware-software method of its implementation has been disaggregated and introduced. The functions of software and hardware PD systems are systematized in a reference model of the interaction between critical BOS systems. For various networks, for example: telephone networks, global networks, local networks, global networks, etc., the standard model is equipped with several additional (private) functions, but the main functions are the same for all networks. Based on the standard model, the PD channel is a set of functions of two levels: the first, the second

physical, the other one 

channel

(lankovim). Stick We will call it the interface of the physical level. Apparently there are standard varieties: C1, C2, C3 and C4. Stick C1».

standardizes the connections between the channels and the connection modem. The connection with this wine is called “ channel stick

Stick C2 standardizes the connection between the modem and other, related (TDV and transmission multiplexer - MTD, EOM, etc.), devices after reversing the channel signal. That's why this stick is called reinventing(there is no EPV).

Stick C3 – withered stick. If after the modem є EPV, then the stick Among them, other devices are called

STICK CI DATA TRANSMISSION SYSTEMS

let's go crazy.

This stick transmits the rule for protecting information from damages, indicating the type of redundant code, the algorithm for detecting and correcting.

Stick C4
standardizes the connection between MTD and EOM.

Vin is called

multiplexer
This stick is equipped with EOM terminals (devices that work with different fluids. The MTD is called a viscosity processor and a vantage concentrator).
Basic parameters at the interface*

_________________
* Name of the standard.

The edition has been changed, Changed.

N 1.
OKP 6655 30
_______________________________
NATIONAL STANDARD OF SPILKI RSR
Line no. 01.01.83
until 01.01.88 *

Resolution of the State Standard of Ukraine dated October 13, 1992 N 1362

(IVD No. 1, 1993 r_k).

- Note "CODE".

Introduced into force by a decree of the State Committee of the USSR for standards on the 24th leaf fall of 1981. N 5097

Amendment No. 1 was introduced, adopted and put into effect by the Resolution of the State Committee of the SRSR for standards dated 06.26.85 N 1930 from 01.01.86

Amendment No. 1 was introduced by the legal bureau "Code" following the text of IKS No. 10, 1985

1. This standard is expanded to the C1 stick between the signal conversion device (SMD) of the data transmission system and transmission systems with the frequency range of channels.

The standard sets the parameters for receiving the UPS on the C1 stick with the channels linking the voice frequency (VF) and the primary wideband channels (BC) of transmission systems with the frequency subdivision of the channels.

2. The UPS, regardless of the warehouse (type) of the terminal ADF, must be connected to the connection channels along the C1 stick, which is connected between the UPS and the connection channel at the output of the transmission of the UPS and the input of the reception of the UPS.

1, 2. (Changed edition, Amendment No. 1).

3. It is necessary to assign the following settings to the C1 linkage channel: for TC channels - S1-TCh, for ShK channels - S1-ShK.

4. Exchange on the S1-ТЧ and S1-ШК sticks is effected by modulation signals in a working mix of channel frequencies.

5. Nomenclature of Lanzyug Stick C1:

line output;

line input;

Linear input-output (in cases where the bi-wire circuits are switched on).

6. The lances of the C1 stick are symmetrical in relation to the grounded lances and are galvanically insulated from other UPS lances.

(Changed edition, change No. 1).

7. If there is a short-term short circuit between the conductors in the lancets, including a short-circuit to the ground, it is not wrong to call for trouble in the ZPS and get in touch with it.

8. Correction of frequency characteristics and compensation for fading of physical lines is carried out by the device included in the UPS kit.

line input;

9. Stick C1 is responsible for ensuring the transmission of data or (i) conducting service telephone conversations with the UPS via the same communication channel.

10. The damping of the asymmetry of the input and output lances in relation to the ground in the operating frequency range must not be less than 43 dB.

line input;

13. Stick S1-TC

13.1.

Parameters of a pair of devices for mixing signals with switched PM channels

13.1.1.

Switched TV channels are provided to the subscriber using a two-wire switching circuit.

13.1.2.

The level of average strength of signals at the output of the transmission of the ZPS in any mode must be set carefully when the subscriber line is extinguished in such a way that at the point of zero level of the TC channel the average strength of the signal does not exceed shaft minus 13 dBmO (50 μWO).

The loss of the required transmission level is due to ±1 dB.

13.1.3.

The permissible output level of the average voltage of the ZPS for operation via output channels may be no more than minus 10 dBmO (100 μWO).

13.1.1-13.1.3.

(Changed edition, change No. 1).

13.1.4.

The average strength of signals at the input of the ZPS receiver is due to range from minus 43 to 0 dB.

13.1.5.

The nominal input and output supports of the UPS must be increased to 600 Ohm.

The coefficient of variation of the input and output support in relation to the nominal signal in the operating frequency range does not exceed 15%.

Note.

With a double-wire circuit, the output value of the support is ensured by connecting the DC voltage.

The strum of the lanzigu is not to blame for oversupplying 40 mA.

When working on combined channels, which includes plots of the home and backwater levels, the maintenance of equal signals can be ensured.

13.2.1-13.2.3.

(Changed edition, change No. 1).

13.2.4.

The nominal input and output supports of the UPS must be increased to 600 Ohm.

line input;

The ratio of the input and output supports of the UPS in relation to the nominal signal in the operating frequency range does not exceed 15% for two-wire and 20% for four-wire switching circuits.
__________________
13.2.5.

The average strength of signals at the input of the ZPS receiver is due to range from minus 26 to 0 dB.

Subject to weather conditions, it is allowed to set the lower level to minus 30 dB.

14*. Stick S1-ShK

* Change No. 1 suggests turning off paragraph 14. - Note “CODE”.

14.1.

Parameters for obtaining devices for converting signals with leading pre-group broadband channels without commutation

14.1.1.

The parameters for receiving the SPS are set to select the output of the connecting (subscriber) lines from extinguishments, which is equal to 0 dB.

14.1.2.

The operating frequency of the pre-group wide-smooth channel is 11.1 kHz.

14.1.6.

(Inclusions, Zm. No. 1).

line input;

14.2.

Parameters for obtaining devices for converting signals from the primary wide-angle communication channels

14.2.1.

The lower frequency of the working signal of the primary wide-smooth channel is 60.6 kHz, the upper one is 107.7 kHz.

For smooth frequencies of the primary channel, you can select a control frequency (CF) of 84.14 kHz or 104.08 kHz.

UPS is obtained from the first broadband channels at their connection points, where the nominal pressure levels are minus 36 dB at the input channel and minus 42 dB at the output channel or minus 5.2 dB - at the input and output of the channel.

Note.

Subject to conditions, nominal input levels are allowed, equal to minus 42 dB for the transmitting voltage and minus 36 dB for the receiving voltage.

14.2.2.

The level of average strength of the signal at the point of the zero level of the wide-smooth channel should become minus 4.3 dBmO (384 μW).

When operating on the output channels, the connection and connecting lines are given the ability to set the average pressure level to 0 dBmO (1000 μWO).

14.2.1, 14.2.2.

(Changed edition, change No. 1).

line input;

14.2.3.

(Inclusions, Zm. No. 1).

line input;

14.2.4.

The information that is transmitted is processed in such a way that the average strength of data transmission signals near the group control frequencies at the point of the zero reference level is lower than the current values:



Frequency values ​​(), Hz, numerically high data transmission speed, bit/s, for a pulseless signal and a signal in the Miller code and half of the transmission speed for a low level signal and CTS;
- The duration of a single data signal interval.
minus 70 dBmO – in the range ±25 Hz;

minus 30 dBmO – in the range ±100 Hz;
minus 15 dBmO – in the range – 200 Hz.
Signal shaping in designated frequency ranges must be ensured entirely with channel-forming equipment.