Fixed Radio Systems; Point-to-point equipment; Plesiochronous Digital Hierarchy (PDH); Low and medium capacity digital radio systems operating in the 13 GHz, 15 GHz and 18 GHz frequency bands

ETS for low and medium capacity DRRS operating in the 13GHz band. Will replace the old and obsolete T/TR 04-42 taking into account the fact that lower capacities than 34 Mbit/s are required in the radio network of the users.

Fiksni radijski sistemi – Oprema tipa točka-točka – Pleziohrona digitalna hierarhija (PDH) – Digitalni radijski sistemi z nizko in srednjo zmogljivostjo, ki delujejo v frekvenčnih pasovih 13 GHz, 15 GHz in 18 GHz

General Information

Status
Published
Publication Date
30-Nov-2003
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Dec-2003
Due Date
01-Dec-2003
Completion Date
01-Dec-2003

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SLOVENSKI STANDARD
SIST EN 301 128 V1.1.2:2003
01-december-2003

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3'+ ±'LJLWDOQLUDGLMVNLVLVWHPL]QL]NRLQVUHGQMR]PRJOMLYRVWMRNLGHOXMHMRY

IUHNYHQþQLKSDVRYLK*+]*+]LQ*+]

Fixed Radio Systems; Point-to-point equipment; Plesiochronous Digital Hierarchy (PDH);

Low and medium capacity digital radio systems operating in the 13 GHz, 15 GHz and 18

GHz frequency bands
Ta slovenski standard je istoveten z: EN 301 128 Version 1.1.2
ICS:
33.040.20 Prenosni sistem Transmission systems
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
SIST EN 301 128 V1.1.2:2003 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 301 128 V1.1.2:2003
---------------------- Page: 2 ----------------------
SIST EN 301 128 V1.1.2:2003
ETSI EN 301 128 V1.1.2 (2000-06)
European Standard (Telecommunications series)
Fixed Radio Systems;
Point-to-point equipment;
Plesiochronous Digital Hierarchy (PDH);
Low and medium capacity digital radio systems operating
inthe13GHz,15GHzand18GHzfrequencybands
---------------------- Page: 3 ----------------------
SIST EN 301 128 V1.1.2:2003
2 ETSI EN 301 128 V1.1.2 (2000-06)
Reference
REN/TM-04039a
Keywords
DRRS, PDH, radio, transmission
ETSI
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Important notice
Individual copies of the present document can be downloaded from:
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The present document may be made available in more than one electronic version or in print. In any case of existing or

perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).

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Users of the present document should be aware that the document may be subject to revision or change of status.

Information on the current status of this and other ETSI documents is available at http://www.etsi.org/tb/status/

If you find errors in the present document, send your comment to:
editor@etsi.fr
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2000.
All rights reserved.
ETSI
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SIST EN 301 128 V1.1.2:2003
3 ETSI EN 301 128 V1.1.2 (2000-06)
Contents

Intellectual Property Rights................................................................................................................................5

Foreword ............................................................................................................................................................5

1 Scope........................................................................................................................................................6

2 References................................................................................................................................................6

3 Symbols and abbreviations ......................................................................................................................8

3.1 Symbols..............................................................................................................................................................8

3.2 Abbreviations .....................................................................................................................................................8

4 General characteristics .............................................................................................................................8

4.1 Frequency bands and channel arrangements.......................................................................................................8

4.1.1 Channel plans................................................................................................................................................8

4.1.2 Channel Spacing (CS)...................................................................................................................................9

4.2 Compatibility requirements between systems.....................................................................................................9

4.3 Performance and availability requirements ........................................................................................................9

4.4 Environmental conditions...................................................................................................................................9

4.4.1 Equipment within weather protected locations (indoor locations)................................................................9

4.4.2 Equipment for non-weather protected locations (outdoor locations) ............................................................9

4.5 Electromagnetic compatibility conditions ........................................................................................................10

4.6 Power supply....................................................................................................................................................10

4.7 Telecommunications Management Network (TMN) requirements ..................................................................10

4.8 Block diagram ..................................................................................................................................................10

4.9 Mechanical specifications for Radio Frequency (RF) interfaces......................................................................11

5 Baseband characteristics ........................................................................................................................11

5.1 Plesiochronous Digital Hierarchy (PDH) interfaces.........................................................................................11

6 Transmitter characteristics.....................................................................................................................11

6.1 Output power....................................................................................................................................................11

6.1.1 Automatic Transmit Power Control (ATPC) ..............................................................................................12

6.2 RF spectrum masks...........................................................................................................................................12

6.3 Spectral lines at symbol rate.............................................................................................................................13

6.4 Spurious emissions ...........................................................................................................................................13

6.4.1 Spurious emissions - external......................................................................................................................13

6.4.2 Spurious emissions - internal ......................................................................................................................14

6.5 Radio frequency tolerance................................................................................................................................14

6.6 Return loss........................................................................................................................................................14

7 Receiver characteristics..........................................................................................................................14

7.1 Receiver spurious emissions.............................................................................................................................14

7.1.1 Spurious emissions - external......................................................................................................................15

7.1.2 Spurious emissions - internal ......................................................................................................................15

7.2 Input level range...............................................................................................................................................15

7.3 Return loss........................................................................................................................................................15

8 System characteristics without diversity................................................................................................15

8.1 BER as a function of receiver input level.........................................................................................................15

8.2 Equipment background bit errors .....................................................................................................................16

8.3 Interference sensitivity .....................................................................................................................................16

8.3.1 Co-channel external interference ................................................................................................................16

8.3.2 Adjacent channel interference.....................................................................................................................17

8.3.3 Front-end non-linearity requirements (two-tone Continuous Wave (CW) interference).............................18

8.3.4 CW interference..........................................................................................................................................18

8.4 Distortion sensitivity.........................................................................................................................................18

ETSI
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SIST EN 301 128 V1.1.2:2003
4 ETSI EN 301 128 V1.1.2 (2000-06)

Annex A (informative): Additional information .................................................................................19

A.1 Automatic Transmit Power Control (ATPC) .........................................................................................19

A.2 Spectrum masks......................................................................................................................................19

A.3 Lightning protection...............................................................................................................................19

A.4 Generic mechanical requirements..........................................................................................................19

History..............................................................................................................................................................20

ETSI
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SIST EN 301 128 V1.1.2:2003
5 ETSI EN 301 128 V1.1.2 (2000-06)
Intellectual Property Rights

IPRs essential or potentially essential to the present document may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect

of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server

(http://www.etsi.org/ipr).

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)

which are, or may be, or may become, essential to the present document.
Foreword

This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmission

and Multiplexing (TM).

The former title of the present document was: "Transmission and Multiplexing (TM); Digital Radio Relay Systems

(DRRS); Plesiochronous Digital Hierarchy (PDH); Low and medium capacity DRRS operating in the 13 GHz, 15 GHz

and 18 GHz frequency bands".
National transposition dates
Date of latest announcement of this EN (doa): 30 September 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 2001
Date of withdrawal of any conflicting National Standard (dow): 31 March 2001
ETSI
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SIST EN 301 128 V1.1.2:2003
6 ETSI EN 301 128 V1.1.2 (2000-06)
1 Scope

The present document specifies the minimum performance parameters for terrestrial fixed service digital radio

communications equipments operating in the 13 GHz, 15 GHz and 18 GHz frequency bands.

Digital Radio Relay Systems (DRRS) are used for point-to-point connections in local, regional and national networks at

data rates between 2 Mbit/s and 34 Mbit/s.

As harmonized channel spacings lower than 13,75 MHz are not available in the 18 GHz frequency band at the drafting

date of the present document, capacities lower than 2 x 8 Mbit/s are consequently not considered in this frequency band.

However the present document can be considered as a guideline when national frequency plans based on a 3,5 MHz

channel spacing exist.

Systems considered in the present document are able to respect ITU-R Recommendation national or international grade

performance objectives, i.e. ITU-R Recommendations F.1189-1 [9] for national, ITU-R Recommendation F.1092-1 [8]

for international and ITU-T Recommendation G.826 [11]. Maximum hop lengths of about 35 km are normally

achievable according to the considered frequency bands.
The parameters to be specified fall into two categories:

a) those that are required to provide compatibility between channels from different sources of equipment on the

same route, connected either to:
- separate antennas; or to
- separate polarizations of the same antenna.
b) parameters defining the transmission quality of the proposed system.

The present document deals with Radio Frequency (RF) and baseband characteristics relevant to low and medium

capacity Plesiochronous Digital Hierarchy (PDH) transmission. Antenna/feeder system requirements are covered in

ETS 300 833 [18].

As the maximum transmission rate in a given bandwidth depends on system spectral efficiency, different classes are

defined:

Class 1: equipment based on a minimum 4-state modulation scheme (e.g. 4-FSK, 4-QAM, or equivalent).

Class 2: equipment based on a minimum 16-state modulation scheme (e.g. 16-QAM, or equivalent).

Safety aspects are outside the mandate of ETSI and they are not considered in the present document.

2 References

The following documents contain provisions which, through reference in this text, constitute provisions of the present

document.

• References are either specific (identified by date of publication, edition number, version number, etc.) or

non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.

• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same

number.

[1] ITU-R Recommendation F.497-6: "Radio-frequency channel arrangements for radio-relay systems

operating in the 13 GHz frequency band".

[2] ITU-R Recommendation F.636-3: "Radio-frequency channel for radio-relay systems operating in

the 15 GHz band".
ETSI
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SIST EN 301 128 V1.1.2:2003
7 ETSI EN 301 128 V1.1.2 (2000-06)

[3] ITU-R Recommendation F.595-6: "Radio-frequency channel arrangements for radio-relay systems

operating in the 18 GHz frequency band".

[4] ETSI ETS 300 019-1-2: "Equipment Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-2: Classification of environmental

conditions; Transportation".

[5] ETSI ETS 300 132-1: "Equipment Engineering (EE); Power supply interface at the input to

telecommunications equipment; Part 1: Operated by alternating current (ac) derived from direct

current (dc) sources".

[6] ETSI ETS 300 132-2: "Equipment Engineering (EE); Power supply interface at the input to

telecommunications equipment; Part 2: Operated by direct current (dc)".

[7] ITU-T Recommendation G.703 (1988): "Physical/electrical characteristics of hierarchical digital

interfaces".

[8] ITU-R Recommendation F.1092-1: "Error performance objectives for constant bit rate digital path

at or above the primary rate carried by digital radio-relay systems which may form part of the

international portion of a 27 500 km hypothetical reference path".

[9] ITU-R Recommendation F.1189-1: "Error performance objectives for constant bit rate digital paths

at or above the primary rate carried by digital radio-relay systems which may form part or all of the

national portion of a 27 500 km hypothetical reference path".

[10] ITU-T Recommendation G.773 (1999): "Protocol suites for Q-interfaces for management of

transmission systems".

[11] ITU-T Recommendation G.826 (1993): "Error performance parameters and objectives for

international, constant bit rate digital paths at or above the primary rate".

[12] ETSI EN 300 385: "Electromagnetic compatibility and Radio spectrum Matters (ERM);

ElectroMagnetic Compatibility (EMC) standard for fixed radio links and ancillary equipment".

[13] ITU-R Recommendation F.1101: "Characteristics of digital radio-relay systems below about

17 GHz".

[14] ITU-R Recommendation F.1102: "Characteristics of radio-relay systems operating in frequency

bands above about 17 GHz".

[15] CEPT/ERC Recommendation T/R 12-02: "Harmonized radio frequency channel arrangements for

analogue and digital terrestrial fixed systems operating in the band 12,75 GHz to 13,25 GHz".

[16] CEPT/ERC Recommendation T/R 12-07: "Harmonized radio frequency channel arrangements

digital terrestrial fixed systems operating in the bands 14,5 to 14,62 GHz paired with 15,23 to

15,35 GHz".

[17] CEPT/ERC Recommendation T/R 12-03: "Harmonized radio frequency channel arrangements for

digital terrestrial fixed systems operating in the band 17,7 GHz to 19,7 GHz".

[18] ETSI ETS 300 833: "Fixed Radio Systems; Point to Point Antennas; Antennas for point-to-point

fixed radio systems operating in the frequency band 3 GHz to 60 GHz".
[19] ITU-R Recommendation SM.329-7: "Spurious emissions".

[20] ITU-R Recommendation F.1191-1: "Bandwidths and unwanted emissions of digital radio-relay

systems".

[21] ITU-R Recommendation F.758-1: "Considerations in the development of criteria for sharing

between the terrestrial fixed service and other services".
[22] IEC 60154: "Flanges for waveguides".
[23] CEPT/ERC Recommendation 74-01: "Spurious emissions".
ETSI
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SIST EN 301 128 V1.1.2:2003
8 ETSI EN 301 128 V1.1.2 (2000-06)
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the following symbols apply:
dB decibel
dBm decibel relative to 1 mW
GHz GigaHertz
kg kilogramme
kHz kiloHertz
km kilometre
Mbit/s Mega-bits per second
MHz MegaHertz
ppm parts per million
ns nanosecond
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ATPC Automatic Transmit Power Control
BBER Background Bit Error Rate
BER Bit Error Rate
C/I Carrier to Interference ratio
CS Channel Separation
CW Continuous Wave
Fc cut-off Frequency
FSK Frequency Shift Keying
IF Intermediate Frequency
NFD Net Filter Discrimination
PDH Plesiochronous Digital Hierarchy
QAM Quadrature Amplitude Modulation
RF Radio Frequency
RSL Receive Signal Level
TMN Telecommunications Management Network
TX Transmit
4 General characteristics
4.1 Frequency bands and channel arrangements
4.1.1 Channel plans

The systems are required to operate in the 13 GHz, 15 GHz or 18 GHz frequency bands.

These channel plans based on a 3,5 MHz homogeneous channel pattern using vertical and horizontal polarizations shall

be in accordance with the ITU-R Recommendations F.497-6 [1], F.636-3 [2], F.595-6 [3] and the CEPT/ERC

Recommendations T/R 12-02 [15], T/R 12-07 [16] and T/R 12-03 [17].

All the GO channels shall be in one frequency half band and all the RETURN channels in the other half band.

ETSI
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SIST EN 301 128 V1.1.2:2003
9 ETSI EN 301 128 V1.1.2 (2000-06)
4.1.2 Channel Spacing (CS)

For systems operating on different antennas or different polarization of the same antenna, on the same route.

Table 1a: Channel spacings: 13 GHz & 15 GHz frequency bands
Bit rate 2Mbit/s 2x2Mbit/s 8 Mbit/s 2x8Mbit/s 34Mbit/s 2x34Mbit/s
Mbit/s
Channel Class 1 1,75 MHz 3,5 MHz 7 MHz 14 MHz 28 MHz -
Spacing Class 2 - 1,75 MHz 3,5 MHz 7 MHz 14 MHz 28 MHz
NOTE: n x 2 Mbit/s and n x 8 Mbit/s bit rates may be used where appropriate.
Table 1b: Channel spacings: 18 GHz frequency band
BitRateMbit/s 2x8Mbit/s 34Mbit/s 2x34Mbit/s
Channel Class 1 13,75 MHz 27,5 MHz -
Spacing Class 2 - 13,75 MHz 27,5 MHz
NOTE: n x 2 Mbit/s and n x 8 Mbit/s bit rates may be used where appropriate.
4.2 Compatibility requirements between systems

There shall be no requirement to operate transmitting equipment from one manufacturer with receiving equipment from

another.

Different manufacturer equipment may be used on different polarization of one antenna but there shall be no

requirement to multiplex different manufacturer's equipment on the same polarization of the same antenna.

4.3 Performance and availability requirements

Equipments shall be designed in order to meet network performance and availability requirements foreseen by

ITU-T Recommendation G.826 [11], following the criteria reported in ITU-R Recommendations F.1092-1 [8] and

F.1189-1 [9] for international and national portions of the digital connection. The implication of the link design on the

performance is recognized and the general design criteria reported in ITU-R Recommendations F.1101 [13] and

F.1102 [14] shall be applied.
4.4 Environmental conditions
Both indoor and partially outdoor installations are considered.

The equipment shall be required to meet the environmental conditions set out in ETS 300 019-1-2 [4] which defines

weather protected and non-weather protected locations, classes and test severity.

The manufacturer shall state which class the equipment is designed to withstand.
4.4.1 Equipment within weather protected locations (indoor locations)

Equipment intended for operation within temperature controlled locations or partially temperature controlled locations

shall meet the requirements of ETS 300 019-1-2 [4] classes 3.1 and 3.2, respectively.

Optionally, the more stringent requirements of ETS 300 019-1-2 [4] classes 3.3 (non-temperature controlled locations),

3.4 (sites with heat trap) and 3.5 (sheltered locations) may be applied.
4.4.2 Equipment for non-weather protected locations (outdoor locations)

Equipment intended for operation within non-weather protected locations shall meet the requirements of

ETS 300 019-1-2 [4] classes 4.1 or 4.1E.
ETSI
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SIST EN 301 128 V1.1.2:2003
10 ETSI EN 301 128 V1.1.2 (2000-06)

Class 4.1 applies to many European countries and class 4.1E applies to all European countries.

For systems supplied within a specific radio cabinet, which gives full protection against precipitation, wind, etc.

ETS 300 019-1-2 [4] classes 3.3, 3.4 and 3.5 may also be applied to equipment intended for operation in non-weather

protected locations.
4.5 Electromagnetic compatibility conditions
Equipments shall operate under the conditions specified in EN 300 385 [12].
4.6 Power supply

The equipment shall operate from any of the secondary supplies within the ranges specified in ETS 300 132-2 [6].

According to the present document, the following nominal value and tolerance is specified:

Table 2a: Power supplies - 48 V DC
For 48 V DC nominal: -40,5 V DC to -57 V DC

Also a nominal value of 60 V DC shall be considered, with the following tolerance value:

Table 2b: Power supplies - 60 V DC
For 60 V Dc nominal: -50,0 V DC to -72 V DC

It may be required to operate from a secondary supply according to ETS 300 132-1 [5], with the following nominal

values and tolerances:
Table 2c: Power supplies - AC
For 230 V AC nominal: 207 V AC to 253 V AC
50 Hz ±2Hz

For DC systems, the positive pole of the voltage supply shall be earthed at the source.

A primary supply of +24 V or –24 V DC or 110 V AC, which is not covered by ETS 300 132-1 [5], may be required.

Table 2d: Power supplies - other
For 24 V DC nominal: 21,8 V DC to 28,15 V DC
For 110 V AC nominal: 99 V AC to 121 V AC 60 Hz ±2Hz
4.7 Telecommunications Management Network (TMN)
requirements
Any TMN interface should be in accordance with ITU-T Recommendation G.773 [10].
4.8 Block diagram

The system block diagram is shown in figure 1. The intersection points are for reference only and not necessarily for

measurement purposes, nor do they indicate a specific design structure.
ETSI
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SIST EN 301 128 V1.1.2:2003
11 ETSI EN 301 128 V1.1.2 (2000-06)
B' C' D'
Branching
Transmitter RF Tx Filter Feeder
Network
D C Z
Branching
Feeder RF Rx Filter Receiver
Network

NOTE 1: For the purpose of defining the measurement points, the branching network does not include a hybrid.

NOTE 2: Points B and C, B' and C' may coincide.
Figure 1: System block diagram
4.9 Mechanical specifications for Radio Frequency (RF)
interfaces

If a waveguide flange is used at point C/C', the following type shall be used in accordance with IEC 60154 [22].

Table 3: RF waveguide interfaces
Frequency bands Waveguide flange
13 GHz UBR/UDR/PBR/CBR 120 or 140
15 GHz UBR/UDR/PBR/CBR 140
18 GHz UBR/PBR/CBR 220
5 Baseband characteristics
5.1 Plesiochronous Digital Hierarchy (PDH) interfaces

PDH interfaces at 2 Mbit/s, 8 Mbit/s and 34 Mbit/s shall comply with ITU-T Recommendation G.703 [7]. Parameters

for service channels and wayside traffic channels are outside the scope of the present document.

6 Transmitter characteristics
6.1 Output power

The maximum value of output power, referred to point C' shall not exceed +40 dBm under any conditions. If for proper

operation of the system, a lower transmitter output power is required, then an internal or external means of adjustment

shall be provided.
The maximum nominal value shall be declared by the manufacturer.

The tolerance value around the nominal or selected value of output power is ±2 dB for outdoor operating systems and

±1 dB for indoor operating systems.
ETSI
---------------------- Page: 13 ----------------------
SIST EN 301 128 V1.1.2:2003
12 ETSI EN 301 128 V1.1.2 (2000-06)
6.1.1 Automatic Transmit Power Control (ATPC)
ATPC is an optional feature.

The ATPC range is defined as the power interval from the maximum (including tolerances) output power level to the

lowest transmitter output power level (at point B').
If implemented, the ATPC range shall not be less than 10 dB.

NOTE: For hop lengths of more than about 35 km, which are of interest at least in the 13 GHz band, an ATPC

device with a range of more than 20 dB may be required.

Equipment with ATPC will be subject to manufacturer declaration of ATPC range and related tolerances. Testing shall

be carried out with output power level corresponding to:
- ATPC set manually to a fixed value for system performance (see clause 8);

- ATPC set at maximum power for Transmit (TX) performance (see subclauses 6.1 to 6.5).

Further information on ATPC is given in annex A.
6.2 RF spectrum masks

The spectrum masks relative to standard channel spacings are shown in figure 2 and in table 4. The related spectrum

analyser settings for measurement purposes are shown in table 5.

The equipment shall comply with the digital RF power spectrum mask given in figure 2.

The 0 dB level shown on the spectrum masks relates to the spectral power density of the actual centre frequency

disregarding residual carrier. These masks do not include an allowance for frequency tolerance.

In some particular circumstances as mentioned in clause A.2, tighter spectrum masks are required.

Transmitter
Spectral
-10
Power Density
Class 1
[dB]
-20
-23
-30
Class 2
-32
-37
-40
-45
-50
-55
-60
fo f1 f2 f3 f4
Frequency From fo = Actual Transmitter Carrier Frequency
Figure 2: Limits of spectral power density

Reference frequencies f1 to f5 are reported in table 4 for the considered bit rate and channel spacings.

ETSI
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SIST EN 301 128 V1.1.2:2003
13 ETSI EN 301 128 V1.1.2 (2000-06)

Table 4: Reference frequencies relating to the class of the equipment and channel spacing

Spectrum Bit-rate Channel f1 f2 f3 f4 f5
efficiency [Mbit/s] spacing [MHz] [MHz] [MHz] [MHz] [MHz]
class [MHz]
0,7 1,4 1,75 3,5 4,375
21,75
2x2 3,5 1,4 2,8 3,5 7 8,75
2,7 5,6 6,5 13 17,5
18 7
2 x 8 14 (13,75) 5,4 11,2 13 26 35
11 19 25 45 70
34 28 (27,5)
2 x 2 1,75 0,7 1,4 1,75 3,5 4,375
1,4 2,8 3,5 7 8,75
28 3,5
2x8 7 2,8 5,6 7 14 17,5
5,6 11,2 14 28 35
34 14 (13,75)
2x34 28(27,5) 11,2 22,4 28 56 70
NOTE: Values in parenthesis refer to the 18 GHz band.
Table 5: Spectrum analyser settings for RF power spectrum measurements
Channel spacing [MHz] 1,75 3,5 7 14 28
(13,75) (27,5)
Centre frequency actual actual actual actual actual
Sweep width [MHz] 10 20 40 80 160
Scan time auto auto auto auto aut
...

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