Promax PROLINK-7 User Manual

TV & SAT LEVEL METER

1 GENERAL INFORMATION

1.1 Description

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PROLINK-7

The of frequencies covered - 5 to 862 MHz and 920 to 2150 MHz - makes it an excellent instrument for Television', where the subband tuning margin, from 5 to 45 MHz, enables the user to carry out tests on the return channel), ('Very Small Aperture Terminal') analysis (38.9 MHz).

The adopting, apart from the characteristic parameters of the standard, the correcting automatic system to obtain in all the cases an accurate measuring of the input signal level. It admits any TV system ( directly with carrier-to-noise ratio ( modulation: QPSK, QAM or OFDM). Being a multistandard instrument, it can be efficiently used in any country of the world. Its accuracy and reliabilit y mee t the needs of the most demanding users.

Its design featuri ng a microprocess or-based

OSD

the and parameters configured by the user, enables him to adapt its with

to optimise the process of measurement; for example, continuous frequency the correction of linearity and flatness errors, the appropriate selection of the attenuators, and the automatic cut-off after the device has been inactive for a certain period of time. To enhance its convenience of use, it has different measuring configurations: name of broadcasting station, frequency, units of measurement, standard, power supply to external units, frequency of the sound subcarrier and kind of measurement (level, V/A or digital carrier). Moreover, the

DATALOGGER

(99 configurations x 99 different signals) that makes it much easier to test systems in which a large number of measurements have to be made, and enables further processing of all the information acquired.

absolute values and, optionally, on an analogue bar shown superimposed on the monitor image, that facilitates the de tec tion of th e m ax imu m level. Mo re ov er, in the LV sound mode, the loudspeaker emits a tone whose frequency depends on the level of the signal received, which is very useful when installing antennas. It is also possible to display on screen the line synchronism pulse like on an oscilloscope screen.

('On Screen Display') function that displays on screen the different functions

remarkable ease

A modern µP automatically handles a large part of the operations necessary

The signal level measured is indicated numerically on an LCD display, in

FM radio, terrestrial TV, cable TV (CATV

PR OLI NK-7 includes the main TV standards: M , N, B, G , I, D , K a nd L,

digital TV

function permits the acquisition and storage of up to

is the most advanced of the

satellite TV, MMDS microwave links, VSAT

systems, digital TV

PAL, SECAM

signals for which it provides directly the measuring of power,

C/N

) and bit error rate (

PROMAX

NTSC

and

BER

) (this last according to the required

intelligent control system

level meters. The range

, 'Community Antenna

intermediate frequency

and

) and allows the user to work

a dvance d c apabilities

99 memories

to store the

9801 measures

along with

synthesis

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The selection of sound subcarrier is automatic, depending on the standard, or tunable between 4 and 9 MHz. When decoding TV sound it is possible to choose between the includes a

NARROW

NICAM

and

WIDE

filter to obtain the best carrier discrimination. It

decoder that provides the indication of the bit error rate (

BER

) and the type of sound received (STEREO/DUAL). Moreover, the possibility to com mute the channel that is delivered to the loudspeaker enables the user to check the sound stereo and dual.

The

PROLINK-7

level is only one of its multiple functions. of the

line synchron ism pulse

EUROCONNECTOR

is a highly advanced instrument in which the measuring of

Teletext, spectrum a nalyse r function

, display

are so me of t he pos sibilities p rovided.

has been also i ncl uded wit h i nput /out put of audi o/ vi deo. The o utput of sate llite video on base band allows the use of D2-MAC decoders and others.

The instrument is mains powered or with a rechargeable battery, and it is also possible to supply different voltages to the external unit ( terrestrial TV, and

13 V / 15 V / 18 V / 13 V + 22 kHz / 15 V + 22 kHz / 18 V + 22kH z

13 V / 15 V / 18 V / 24 V

satellite TV).

It also incorporates a

RS-232C

interface which enables the user to connect the instrument to a PC for data recording, remote-control of the instrument and to a printer in order to print out the measurements.

Its constructi on is bas ed on

('Intelli gent Module Interc onnection') tec hnology,

IMI

developed by the PROMAX R & D team, that allows easy updating of the instrument by incorporating new functions and optional cards with a high degree of flexibility.

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1.2 Specifications

TUNING

Spe ctrum bands

Sub-band VHF

UHF SAT FM IF input

Tuning mode s

Indicator Resolution

Automa tic se arch Memory Da ta Logger function LEVEL MEASUREMENT Measurement range

Terrestrial TV & FM bands

S a te llite T V ba n d SPECTRUM mode

S a te llite ba n d T erre stria l bands Bandwidth

Reading

Digital Analogue

Attenuators

T erre stria l bands

S a te llite ba n d Input impeda nce Measurement bandwidth

IF ba ndwidth Audible indicator Accuracy

Sub-band

T erre stria l bands

S a te llite ba n d RF output

Inse rtion losse s

Variable span

Te rre st. bands S a te llite ba n d

F ull sp a n

Terrestrial Satellite

Digital frequency synthesis. Continuous tuning from 5 to 862 MHz and from 920 to 2150 MHz.

Sub-band 5 - 45 MHz LOW band 45 - 170 MHz HIGH band 170 - 450 MHz UHF band 450 - 862 MHz SAT TV 1st IF 920 - 2150 MHz FM band 87 - 109 MHz

38.9 MHz Frequency, channel or memory. On demand channel table LCD alphanumeric display

62.5 kHz in TV and FM 500 kHz in SAT Selectable threshold 99 configurations 9801 measurements

20 dBµV to 130 dBµV (10 µV to 3.16 V) 30 dBµV to 120 dBµV (31.6 µV to 1 V)

30 dBµV to 120 dBµV (31.6 µV to 1 V) 20 dBµV to 130 dBµV (10 µV to 3.16 V)

100 kHz, 230 kHz or 1 MHz selectable 100 kHz, 230 kHz or 4 MHz selectable

1 MHz 4 MHz Auto-range or manual selection Absolute value calibrated in dBµV, dBmV, dBm or V Relative value: analogue bar on the screen

0 to 80 dB, AUTO (10 dB steps) 0 to 70 dB, AUTO (10 dB steps) 75 Ω (BNC) 230 kHz (terrestrial bands) 4 MHz (satellite band) (maximum band ripple 1 dB). 300 kHz (TV) 27 MH z (SAT) A tone that varies with the signal level

±1.5 dB (50-120 dBµV and 5-45 MHz) (22ºC ± 5ºC) ±1 dB (30-120 dBµV and 48.25-861 MHz) (22ºC ± 5ºC) ±1 dB (40-100 dBµV and 920-2050 MHz) (22º C ± 5ºC) 75 Ω (BNC) 22 dB typical, with 10 dB RF INPUT attenuator

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Ma ximum signa l

RF input

From DC to 100 MH z

From 5 to 2150 MHz

Vide o input

MONITOR DISPLAY CRT Synchronism and Burst Spe ctrum function M onitor type Sensitivity 50 / 6 0 H z synchronism

S a te llite ba n d

T erre stria l band

VIDEO SIGNAL Exte rnal video input Sensitivity Vide o output Base ba nd video SA T output

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50 V rms (powered by the mains supply) 30 V rms (not powered by the mains supply) 130 dBµV 3 Vpp

B/W, 5 ½ inches Display through displacement of the picture Variable span in selected band B/W TV, according to the standards M,N,B,G,I,D,K ,L 40 dBµV for co rrect synchronism

Selection of frame frequency between 50 and 60 Hz Selection according to the standard

BNC, Euroconnector (automatic selection) 1 Vpp (75 Ω) positive video BNC, Euroconnector (75 Ω)

BNC, 1 Vpp (75 Ω)

IF OU TPU T

SOUND Input Output Demodulation De-emphasis Subcarrier

Variable

Fixed

BNC (75 Ω)

Euroconnector Speaker, Euroconnector, external headphone AM, FM, TV and NICAM, selectable 50µs Digital frequency synthesis From 4 to 9 MHz, 10 kHz resolution According to the standard selected: 4.50, 5.50, 5.80,

6.00, 6.50, 6.65, 5.74, AM , FM, LV, OFF.

TELETEXT

INTERFACE RS-232C

POWER TO EXTERNAL UNITS

Decodes at 1.5 level

Through the RF input connector

T erre stria l TV

S a te llite T V

22 kH z signa l

Voltage Frequency

Ma ximum power

External or 13/15/18/24 V External or 13/15/18 V Selectable

0.6 V ±0.2 22 kHz ±4 5 W

POWER SUPPLY Battery Autonomy

12 V / 6 Ah Better than 1 h 30 minutes (without external units powering)

Re cha rging time Mains Consumpti on

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From 7 to 8 hours starting from a complete discharge 100 to 250 V AC/50-60 Hz 95 W

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OPERATING ENVIRONMENTAL CON DITIONS M a x. a ltitude Temperature range M a x. re la tive h um idity

2000 m From 5 to 40 ºC 80 % (up to 31 ºC), decreasing lineally up to 50% at 40 ºC

MECHANICAL FEATURES Dimensions Weight

ACCESSORIES INCLUDED DC-243 Carrying bag CA-05 Power cord

Ω

ZB-75 75 VI -1 7 Vie wing hood CB-068 12 V, 6Ah, rechargeable battery AD-051 BN C/M-"F"/F adapter BNC/TV BNC/M-ANT/H adapter 1 spare fuse 5x20 mm - 2.5 A - F - 250 V - IEC127

OPTIONAL ACCESSORIES CI-23 Portable serial printer

(BNC) load

W. 305 x H. 145 x D. 334 mm 11 kg

OPTIONS OPT-107-15 Carrying case OPT-107-61 Channel plans programming OPT-107-71 BER measurements for QPSK signals OPT-107-72 BER measurements for QAM signals OPT-107-73 BER measurements for COFDM signals OPT-107-91 Eastern Europe Teletext OPT-107-92 Arab and Hebrew Teletext OPT-107-93 Turkish and English T eletext

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2 SAFETY RULES

* Use this equipment connected

connecte d to ground potential

* This is a

corresponding

* This equipment can be used in

only to systems with their negative of measurement

equipment, for safety reasons plug it to a supply line with the

class I

ground terminal

Ca tegory II

installations and

environments.

* When using some of the following accessories

ensure safety.

Rechargeable battery Power cord

* Observe all

specified ratings

* Remember that voltages higher than

* Use this instrument under the

The use r is only authorize d to

both of supply and measurement

60 V DC

specified e nvironmental conditions

carry out the following maintenance operations:

Pollution De gree 2

use only the specified ones

30 V AC rms

are dangerous

Replace the battery Replace the mains fuse, which should be of the specified type and value

On the Maintenance paragraph the proper instructions are given. Any other

change on the equipment should be carried out by qualified personnel.

* The negative of measurement is at ground potential.

D o not obstruct the ve ntilation syste m

of the instrument.

* Use for the signal inputs/outputs, specially when working with high levels,

appropriate low radiation leads.

* Follow the

clea ning instructions

described in the Maintenance paragraph

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* Symbols related with safety:

DIRECT CURRENT

ALTERNATING CURRENT

DIRECT AND ALTERNATING

GROUND TERMINAL

PROTECTIVE CONDUCTOR

FRAME TERMINAL

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EQUIPOTENTIALITY

ON (Supply)

OFF (Supply)

DOUBLE INSULATION (Class II Protection)

CAUTION (Risk of electric shock)

CAUTION REFER TO MANUAL

FUSE

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3 I N ST ALLAT IO N

3. 1 P owe r S upply

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The

PROLINK-7

is a portable instrument powered by a 12 volt built-in battery. Before taking any measurements, the battery charge must be checked. If it is low (a voltage lower than 11.0 V), a blinking

LOW BATTERY

message will appear on the

display [14].

If the battery is very weak, the battery cut-off circuit will prevent the device from functioning. In such a situation the battery must be recharged immediately. If the battery is complete ly discharged, it is advisable to recharge the battery for a period of half and hour before putting the instrument into operation again.

3. 1. 1 Ope ra ting on the ele ctrical mains supply

Although the device is designed for use as portable equipment, it can also operate when connected to the mains power supply.

Connect the device to the mains and press the power-on switch [20]. The field meter is now in operation and the battery will slowly rech arge.

When the unit is connected to the mains, the light indicator

The instrument can be powered by mains voltages of 100 to 250 V

AC 5 0 -6 0 H z without a voltage sele ctor.

remains on.

LINE

3.1.2 Operating on the battery

For the device to operate on the battery, disconnect the power cable and press the power-on switch [20]. The fully charged battery can power the equipment for more than one hour non-stop, and depending on the mode of operation, it can be powered for up to three hours. When the

LOW BATTERY

indicator appears, the battery

must be recharged immediately.

NOTE

When operating on the battery the PROLINK-7 has no protection fuses

accessible to the user. The pow e r- supply syste m ha s a set of ele ctronic sa fe ty

devices to e nsure its proper functioning. If the instrument stops functioning, it

must be taken directly to the nearest technical assistance service to be

checked.

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3.1.2.1 Charging the battery

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To fully recharge the battery, connect the device to the mains supply

pressing

the power-on switch [20]. The length of time it takes to recharge it depends on the condition of the battery. If it is very low (the has lit) the recharging period is about 7 hours. The

[22] indicator should remain

LINE

LOW BATTERY

without

indicator

lit.

IMPO RTANT The lea d battery of the instrument must be kept fully charge d during pe riods whe n it is not in use. To e nsure the be st results, the ba ttery m ust alwa ys be fully charge d. If the e quipment is in storage or is used only occasionally for a long period of time, it is ABSO LU TE LY N EC ESSARY to check the full-charge functions periodically (e very six months, for exa mple), and to compe nsate for the self-discharging effect of the battery. The rate at which a fully charged battery self-discharges depends on the temperature. For example, at an ambient temperature of 20º C, the battery suffers a 50% loss after 16 months, and a t 40 º C it loses the sam e cha rge in only 5 months. If the ba ttery re ma ins very we a k for a pe riod of several days, it cannot be recha rged since the pla tes are sulphate d and must be repla ced.

3.2 Installation and start-up

The

PROLINK-7

field meter is desi gned f or use as a portabl e dev i ce. A carryi ng case is supplied to simplify transport and to allow the user to take measurements conveniently in any type of installation.

When the [20] key is pressed, the instrument is in the "automatic power-off" mode; that is, the device is automatically disconnected fifteen minutes after the last time a key has been pressed.

Automatic power-off mode may be deactivated by hol di ng down the [20] key for one or two seconds when turning the instrument on. The

MANUAL POWER OFF

indication appears on the display.

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4 OPERATING INSTRUCTIONS

This instruction m anua l describes instruments with a 3 . 23 program version or

later

4.1 Description of the controls and elements

Front P a nel

Figure 1.-

[1]

[2] [3]

[4] [5]

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VI D EO . Sta nda rd signal input of 1 V pp e xterna l video

3 Vpp maximum level. The signal is detected automatically and the monitor

switches for the screen display of the external video.

Control of the C R T brightness

Control of the C R T contrast

Control of the sound volume

SP AN . Am plitude of frequency swe ep control in spectrum mode.

When pulled out,

When pressed in,

FU LL S P AN

SPAN VARIABLE

Front panel.

, the sweep of the entire band is selected.

, it is possible by rotating it to vary the

amplitude of sweep.

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[6]

[7]

RF RF output to the interna l unit.

The LNB or antenna amplifier is supplied through this connector. BNC

connector with an output impedance of 75 Ω.

WARNING

When supplying the External Unit (LNB or antenna previous amplifiers) through

the I nterna l Unit (R e ceiver) , m ake sure tha t the cable connecte d to the RF

[6] connector corresponds to the Internal Unit, and that the RF [7]

connector is connected to the E xte rna l U nit. I f the I nterna l U nit is connecte d to

RF [7] and an External Unit voltage is selected, the PROLINK-7 and the

Internal Unit will be connected to the opposite power supplies, which may

dam age one of the two piece s of equipme nt.

RF . R F signal input.

Maximum level: 130 dBµV. BNC connector with an input im pedance of 75 Ω.

ATTENTION

Note the importa nce to protect the RF [7 ] input signal with an a cce ssory to

block 50 Vpp AC, used in CATV cables (needed to feed the amplifiers) and

remote mode.

[8]

[9]

[10]

[11]

[12]

[13]

[14]

DR AI N . E xterna l units powering light indicator

It lights when the

TUNE/SELECT. Rotary selector.

Used for continuous tuning control or to select the options associated to each

key.

SC . Sound ca rrier light indica tor

It indicates that a sound carrier at the selected frequency has been detected

in the tuned transmission.

FM S T E RE O . S te reo F M a udio light indicator

It indicates that a stereo FM transmission has been tuned.

60 H z. F rame freque ncy light indica tor

It indicates that a 60 Hz frame frequency has been selected.

EX T V ID E O. V ideo signal pre sence light indica tor

It lights up when an external video signal is present through either the

VIDEO [1] connector or through the EUROCONNECTOR [46].

Alphanume ric displa y

LCD of two lines of sixteen characters and back lighting. It indicates the level,

frequency/channel, band, name of the broadcasting station, external units

power supply voltage, the sound system, etc.

PROLINK-7

is powering the External Unit.

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[15]

[16]

Keyboard

19 keys for function selection and numerical data input.

SCREEN

Cathode ray tube of the monitor.

Keyboard

[20]

[21]

Figure 2.-

Each key is coded with the colour indicating the related type of operation:

Red

: On and off. Maximum priority.

Green

: Alphanumeric data entry. This switches the keyboard in such

a way that successive pressing of the keys is interpreted according to the numerical value associated with each key.

Blue

: Momentary operation. This is only active while the key is held

down.

POWER

This turns on the instrument, and the user can select either manual or

automatic power-off.

BAT. Batte ry volta ge

This indicates the battery power on the display [14] in volts. Momentary

operation

Keyboard.

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[22]

[23]

LINE

Light indicator which indicates whether the instrument is connected to the

mains.

LEVEL / 0

This key allows the user to select any of the different modes of measurement.

They vary according to the standard, the band, and whether or not there is an

optional card (QPSK, QAM, OFDM).

In the terrestrial bands the following measurement modes may be selected:

Analogue channe ls:

LEVEL VIDEO/AUDIO CARRIER/NOISE

Digital cha nnels:

DIGITAL CARRIER CARRIER/NOISE BIT ERROR RATE

In the s atellite band the following measurement modes may be selected:

Analogue channe ls:

LEVEL CARRIER/NOISE

Measurement of the video carrier level Measurement of the video-to-audio carrier ratio Video carrier-to-noise ratio

Measurement of the digital channel power Digital channel carrier-to-noise ratio Measurement of the bit error rate for QAM and OFDM modulations (only OPT-107-72 and OPT107-73)

Measurement of the video carrier level Carrier-to-noise ratio

[24]

[25]

Digital cha nnels:

DIGITAL CARRIER CARRIER/NOISE BIT ERROR RATE

When the user selects the

CARRIER

measurements is displayed on the screen.

Number 0 in SHIFT mode.

TXT / •

This selects the Teletext information. As the Teletext circuit is optional, this

function is activated only if the µP detects its presence.

Decimal point the SHIFT mode

ATT / 1

This selects the attenuation in the RF input, from 0 to 80 dB on terrestrial

bands, and from 0 to 70 dB on the satellite band, in intervals of 10 dB. There

is also an AUTO position that selects the most appropriate attenuation

according to the input signal level, in order to centre the value of reading in the

optimum scale.

Number 1 in SHIFT mode.

BIT ERROR RATE

Measurement of the digital channel power Digital channel carrier-to-noise ratio Measurement of the bit error rate for QPSK modulations (only OPT-107-71)

VIDEO/AUDIO, CARRIER/NOISE, DIGITAL

modes, the information on these

[26]

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SPECT / 2

This allows the user to switch to the TV operating mode from spectrum

operating mode and vice versa.

Number 2 in the SHIFT mode.

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[27]

MODE / 3

This key selects the operating m ode of the

different modes are available:

: Monitor operating as a conventional

TV+LV

: Monitor operating as a conventional

TV+LV+SY

indicator

: Monitor operating as a conventional

indicator

on the upper part of the screen (the analogue bar).

and the

line synchronizing pulse

screen. The line synchronizing pulse appears with a lateral displacement of the picture if a TV carrier is tuned, or if there

is an external video signal input through the VIDEO [1] connector or the Euroconnector [40]. The analogue bar level indicator shown on the screen has been calibrated and corresponds to the value indicated in the display.

: Indication of the

OFF

: Deactivates the monitor.

signal le v e l

Number 3 in the SHIFT mode

PROLINK-7

monitor. The following

tele vision se t.

tele vision se t

, with a

level

displayed on the

on the screen (the analogue bar).

[28]

SOUND / 4

This selects the type of sound. The options available in each case depend on

the

band

and the

4.50

: Sound carrier 4.50 MHz above the picture carrier.

5.50

: Sound carrier 5.50 MHz above the picture carrier.

5.74

: Selects the second carrier in DUAL or STEREO transmissions, at

standard

selected.

5.74 MHz of the picture carrier.

5.80

: Sound carrier 5.80 MHz above the picture carrier.

6.00

: Sound carrier 6.00 MHz above the picture carrier.

6.50

: Sound carrier 6.50 MHz above the picture carrier.

6.65

: Sound carrier 6.65 MHz above the picture carrier.

7.02

: Sound carrier 7.02 MHz above the picture carrier.

NTUN

: Sound detection narrow filter: 110 kHz (satellite bands)

BTUN

: Sound detection broad filter: 240 kHz (terrestrial and satellite

bands).

: AM demodulation.

: FM demodulation.

: Tone whose frequency varies with the input signal level.

NICA

: Nicam decoding

OFF

: Suppresses the audition of the sound carrier in the speaker and

headphones.

Number 4 in the SHIFT mode

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[29]

[30]

BAND / 5

Selects the band.

Although the tuning is continuous between 5 and 862 MHz and between 920 and 2150 MHz, a band select is included which limits the spectrum display to the commercial bands presently in use and to select a few special cases, such as FM or IF.

SUB

: SUB-BAND. From 5 to 45 MHz

VLO

: VH F LOW. From 45 to 170 MHz

VHI

: VHF HIGH. From 170 to 450 MHz

UHF

: UHF. From 450 to 862 MHz

SAT

: S atellite T V. Fr om 920 to 2150 MHz

: Intermediate frequency 38.9 MHz

: FM. From 87 to 109 MH z

Number 5 in the SHIFT mode

SRCH / 6

This is the function for automatic station search. Starting at the present frequency or channel, it searches until finds a station with an adequate level. The threshold level can be defined by the The search function halts the search process when the end of the band being used is reached, if it is in frequency mode, or when any key is pressed. The sound is deactivated during the search process. This function cannot be used on FM and IF bands.

SEARCH LEVEL

function.

[31]

[32]

[33]

Number 6 in SHIFT mode.

mA/V / 7

This indicates on the display [14] the voltage and current being supplied to the LNB or external amplifier.

Number 7 in the SHIFT mode.

SEL V / 8

This selects the voltage supplied to the external units (LNB or previous amplifiers) from the 18 V and 24 V on terrestrial bands , and EX, 13 V, 15 V, 18 V, 13 V + 22 kHz, 15 V + 22 kHz and 18 V + 22 kHz on the satellite band. In the EX position no voltage is supplied to the external unit, making it possible to supply it with an external power source through the RF [6] connector.

Number 8 in the SHIFT mode.

CHAN / 9

This switches the display indication [14] from channel to frequency. In channel mode the selection of the tuning frequency is adjusted to the selected channel set (CCIR, OIRT, etc.). See the channel-frequency tables in the A appendix at the end of this manual.

PROLINK-7

. The available voltages are: EX, 13 V, 15 V,

Number 9 in SHIFT mode.

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[34]

FUNCT

This selects the functions. When this key is pressed, a function menu with the following fields appears on screen:

TV STANDARD

The user can select any of the various TV standards available, as a function of the band:

B/G, D/K, I, L, M, N

band channels and

DIG

(digital channels) or

DIG

(digital channels) for the terrestrial

ANL

(analogue channels) for the

satellite band channels.

UN I T S : dBµV , dBm V, dBm, Lin

This selects the units of measurement in which the signal level is shown on the display [14]. T he units may be linear (µV, mV, V) or logarithmic (dBµV, dBmV, dBm).

CHANNEL SET

This selects one of the available channel tables.

ME AS U RE BW

This selects the bandwidth of the spectrum display filter between:

Terrestrial channels:

100 kHz, 230 kHz or 4 MHz

Satellite channels:

100 kHz, 230 kHz or 1 MHz

Note

: This filter is only effective in the variable SPAN mode. In the FULL SPAN

mode the filter is always:

4 MHz

: terrestrial band channels

1 MHz

: satellite band channels

NICAM CHANNEL

This selects the NICAM sound channel that is sent to the loudspeaker.

SAT VID EO POL

This selects the polarisation of the video carrier: positive or negative.

LNB LO C AL O S C

It defines the frequency of the local oscillator (L.O.) of the LNB used in the receiving installation which is being studied. In the satellite band, this parameter must be defined in order to be able to tune in the channel mode in accordance with th e sat ellite channel-tables described in the A appendix at the end of this manual.

CHANNEL BW

Selects the bandwidth of the digital channels. This parameter must be defined in order to measure the power or the carrier-to-noise ratio on digital channels.

BEEP

Activates/deactivates the beeper.

AGC MODE

Activates/deactivates the automatic gain control.

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DATA LOGGER

It enables the acqui si t i on, s torage and pri nti ng of up to 9801 measurements (99 memories x 99 test points). The measurements may be taken in a fully automatic way.

It gives access to the next page in the function menu.

EXIT

Exit from the function menu.

CLOCK

Date and time setting.

ALARM

Selects a date and a time for automatic power on.

SEARCH LEVEL

Selects the threshold level of the automatic station search function: SEARCH

FRAME

This permits to choose the fram e frequency between 50 and 60 Hz.

[35]

[36]

[37]

[38]

[39]

It gives access to the previous page.

SHIFT

It enables the user to tune directly the desired frequency with the numerical keyboard. When the second decimal figure is introduced, confirmation is established. It also enables the cursor to be displaced within the menus that appear on screen.

Key for direct function assignment.

Second key for direct function assignment.

START / STO

This key stores a configuration and takes measurements and/or makes printouts with the DATA LOGGER function.

SEL / R CL

This retrieves a measuring configuration and activates/deactivates lines/columns in the DATA LOGGER function.

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Side pane l

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[40]

[41]

[42]

[43]

Figure 3.-

M ains input

Voltages from 95 to 250 V 50-60 Hz.

IF OUT. IF output at 38.9 MHz.

BNC connector with an output impedance of 75 Ω.

VI D EO O U T . C omposite video output

Amplitude of 1 Vpp and positive polarity. In the satellite band it is possible to work with positive and negative video signals. The correct selection of this function enables the user to view signals of either polarity. BNC connector with an output impedance of 75 Ω.

WARNING This signal should not be connected at circuit points with voltage, only to standard video signal inputs with 75 instrument as a result of ignoring this precaution is not covere d in the w arranty.

S AT B B O U T . Ba s e ba nd sa te llite sig na l ou tput

The triangular modulation dispersal or Buergg is not removed. BNC connector with an output impedance of 75 Ω.

Side panel.

Ω

impedance. Any damage to the

06/97 PROLINK-7

- 96 -

[44] [45]

[46] [47]

[48]

Output jack for stere o sound

RS-232C connector

Enables the remote control of the well as data dumping to a printer.

Euroconnector

Fuse holder

Support for the mains fuse.

RESET buttom

Enables the user to restart the instrument if there is any irregularity in its functioning. If it is necessary to reset the instrument, press the reset button with the instrument turned off.

Display

PROLINK-7

from a personal computer, as

Figure 4.-

The alphanumeric display consists of two lines. The top line provides the

principal information.

[E] W orking frequency or channel. [F] Input signal level.

The second line provides supplementary information.

[A] Present RF band. [B] N am e assigned to the configuration memory. This information is only displayed

if there has been no change in the parameters of the selected configuration.

[C] LNB or external unit voltage supply. [D] Type of sound or frequency of the selected carrier.

The numbers [17], [18] and [19] do not correspond to any part of the instrument

and have purposely been omitted from this list.

Possibly, other error m essages or indications for the user may appear on the

lower line.

06/97 PROLINK-7

Display.

4.2 Using the PRO LIN K-7

4. 2. 1 Se lection of the R F band

- 97 -

Press the

BAND/5

[29] key. By turning the

TUNE/SELECT

[9] rotary selector, the different RF bands will appear on the alphanumeri c display [14] in sequential order. When the desired band appears, press the

BAND/5

[29] key again.

Although the tuning is continuous between 5 and 862 MHz and between 920 and 2150 MHz, a band selection is included which limits the spectrum display to the commercial bands presently in use and to select some special cases, such as FM or IF.

The following are the selectable bands:

Name Corresponding ba nd F reque ncy ( M H z)

SUB SUB-BAND 5-45 VLO VHF LOW 45 to 170 VHI VHF HIGH 170 to 450 UHF UHF 450 to 862 SAT SATELLITE TV 920 to 2150 IF Intermediate frequency 38.9 FM FM 87 to 109

Table 1.-

Frequency bands.

4.2.2 Automatic transmission search

By pressing the

SRCH/6

[30] key search starts at the present frequency or channel until it finds a transmission with a level higher than the threshold level previously established with the

The

function halts the search process when the end of the present

SEARCH LEVEL

function.

band is reached, if it is in frequency mode, or when a key is pressed. In channel mode, the search process is halted when the last channel of the group selected is reached (see Appendix A). The sound is deactivated during the search process.

This function cannot be used in the FM bands nor in the IF ones. In the satellite

band, the search process is only available in frequency mode.

06/97 PROLINK-7

4.2.3 Frequency selection

- 98 -

When the

CHAN/9

[33] is pressed, tuning by frequenc y swit ches t o channel and vice versa. Select tuning by frequency (the tuned frequency appears in the upper righthand corner of the alphanumeric display [14]. There are two methods for selecting the frequency:

Entering via TUNE SELECT [9] selector

With the

TUNE/SELECT

[9] rotary selec tor, sel ect the des ired fr equency (tuni ng

is continuous from 5 to 862 MHz and from 950 to 2150 MHz).

Ente ring via keyboa rd

Press the value of the desired frequency in MHz, with figure acts as a confirmation). The

[35] key (the frequency indi cat ion di sappears). Then select the

SHIFT

two decima l figures

PROLINK-7

will wo rk out the synthesised

(the second

frequency closer to the value keyed and shows it on the alphanumeric display. If the entered frequency corresponds to a different band from the programmed, the band will be changed to the correct value for the new frequency.

4.2.4 Channel selection

With the

CHAN/9

[33] key, select the channel tuning mode (in the upper righthand corner of the alphanumeric display [14]). The name of the tuned channel will be displayed. By means of the

TUNE/SELECT

[9] selector we select the desired channel.

4.2.5 Measuring mode selection

Using the

PROLINK-7

, the user can take different kinds of measurements,

depending on the standard, the band and the available options:

T erre stria l bands:

Analogue channe ls:

LEVEL VIDEO/AUDIO CARRIER/NOISE

Digital cha nnels:

DIGITAL CARRIER CARRIER/NOISE BIT ERROR RATE

Measurement of the video carrier level Measurement of the video-to-audio carrier ratio Video carrier-to-noise ratio

Measurement of the digital channel power Digital channel carrier-to-noise ratio Measurement of the bit error rate for QAM and OFDM modulations (only OPT-107-72 and OPT-10773, respectively)

S a te llite ba n d:

Analogue channe ls:

LEVEL CARRIER/NOISE

Digital cha nnels:

DIGITAL CARRIER CARRIER/NOISE BIT ERROR RATE

Measurement of the video carrier level Carrier-to-noise ratio

Measurement of the digital channel power Digital channel carrier-to-noise ratio Measurement of the bit error rate for QPSK modulations (only OPT-107-71)

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To select a particular measuring mode, press the

LEVEL/0

[23]. On the right

part of he display the mode in use will blink, and may be changed by means of the

TUNE/SELECT

[14], press the

When the

[9] selector. W hen the desired operating mode appears on the display

LEVEL/0

[23] key again.

VIDEO/AUDIO

ratio measuring mode is selected the following

information appears on the [16] monitor:

Figure 5

.- Video/Audio ratio m easuring mode

When the

CARRIER/NOISE RATIO

measuring mode is selected the following

information appears on the [16] monitor:

Figure 6

.- Carrier/Noise ratio measuring mode

The user should be aware that the measurement will take severa l seconds to stabilize (six seconds at the most). Each time the unit ends a measurement, an asterisk will appear at the right side of the measurement (when a dot appears, it means the unit is processing the measurement).

When measuring channels in the satellite band or digital channels, to measure the C/N ratio correctly, the bandwidth of the channel must be defined previously, using the

CHANNEL BW

function on the functions menu. The

PROLINK-7

takes the carrier measurement in the centre of the channel (the frequency tuned) and the noise measurement at the frequency tuned plus half the bandwidth of the channel, and applies the necessary bandwidth and signal detector corrections automatically.

06/97 PROLINK-7

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When the

DIGITAL CARRIER

measuring mode is selected the following

information appears on the [16] monitor :

Figure 7.-

4.2.6 Selection of the TV mode

In addition to operating as a television set, the monitor of the

Power measuring mode for digital channels

PROLINK-7

can act as an analogue level indicator, and can display the line synchronising pulse just as it would appear on a screen of an oscilloscope.

Press the

MODE/3

[27] key. By turning the

TUNE/SELECT

[9] rotary selecto r, the user can choose the function of the monitor. On the display [14] the different TV modes will appear one after the other. Pressing the

MODE /3

[27] key again activates

the selected display mode.

Figure 8.-

Selection of the display mode.

06/97 PROLINK-7

The basic modes available are:

- 101 -

: Monitor operating as a conventional

TV+LV

on the upper part of the screen (the analogue bar).

and the

line synchronizing pulse

TV+LV+SY

indicator

: Monitor operating as a conventional

indicator

tele vision se t

, with a

level

displayed on the

screen.

: Indication of the

: Deactivates the monitor.

OFF

4.2.6.1 Operation in SYNC mode

signal le v e l

on the screen (the analogue bar).

This function permits to display the line synchronising pulse corresponding to

a tuned signal on the monitor.

To select the SYNC (synchronising) function, press the

turning the

TUNE/SELECT

[9] rotary selec tor t he di ff erent di spl ayi ng modes will appear

on screen (choose the TV + LV + SY mode). Press the

MODE/3

[27] key again.

[27]. By

The monitor is divided into three sections. In the top section an analogue bar appears which indicates the level of the signal received. On the lower left-hand side the line synchronising pulse is represented as it would appear on the screen of an oscillosc ope. On the lower right-hand side the TV picture is shown, shifted to the right,

Line synchronism + level bar + TV

The

SYNC

Figure 9.-

function shows on the monitor the line synchronising pulse; starting from this signal it is possible to perform a qualitative analysis of the TV picture delivered to the end user.

06/97 PROLINK-7

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The study of the line synchronism pulse facilitates the detection of possible problems like: saturation of signal, lack of chroma in the amplitude of the burst or possible double-image produced by indirect beams captation (as it is shown in figure 10).

Figure 10.-

4.2.6.2 Operation as a spectrum analyzer

To select the Spectrum Analyser function press the

Line synchronism

SPECT/2

[26] key with the monito r activate d. The m onitor w ill display the spectrum mode screen as it is shown in figure 11.

The spectrum analyser function allow s the user to discover the signals present

in each band he is working in quickly and easily.

The frequency spectrum analysis may be conducted in the entire band

selected in

variable SPAN

FU LL SP AN

mode.

mode or in the proximity of the present tuning frequency in

In variable SPAN mode it is possible to choose the display spectrum filter by

using the

MEASURE BW

option of the function menu. It is possible to select the

display spectrum filter bandwidth between:

Terrestrial bands: 110 kHz, 230 KHz or 1 MHz Satellite band: 110 kHz, 230 KHz or 4 MHz

FU LL SP AN

mode this filter is always 1 MHz for the terrestrial bands and

4 MHz for the satellite band.

In the spectrum analyser mode, a vertical base bar appears on the left-hand side of the monitor screen and the lobes representing the signals are shown horizontally, with the higher frequencies in the upper section of the screen and the lower frequencies in the lower sect ion. The distance with respect to the base bar or the amplitude of the lobe represents its power and is proportional to the level that would be measured with the level meter tuning every frequency.

06/97 PROLINK-7

- 103 -

Figure 11.-

Spectrum analyzer.

When the Spectrum Analyser mode is selected, the display eliminates the level indication t o display a reference value (REF. LV) which corresponds to a marker on the screen. This reference level is 70 dBµV by default, and it can be modified using the

[25] key. The subdivisions that appear on the screen represents 10 dB each. In

ATT/1

the spectrum analyser mode the presentation of the tuning frequency remains deactivated on the display [14].

Select the

FULL S PAN

mode by pulling out the

[5] control; the frequency

SPAN

spectrum analysis is executed in the entire band selected. A black horizontal line or marker representing the tuning frequency appears on the screen. As the user moves the

TUNE/SELECT

control [9], the marker will move through the entire spectrum, allowing an approximate pre-tuning of the frequency corresponding to the lobe that coincides with the marker.

Select the variable

SPAN

function by leaving the

SPAN

[5] potentiometer in he rest position (pressed in). The frequency spectrum analysis is conducted in the proximity of the tuning frequency, that can come to zero SPAN. In that case, the entire screen coincides with the same tuning frequency.

By choosing a specific SPAN and varying the tuning with the

TUNE/SELECT

[9] control, the user can slowly sweep the entire selected band of frequencies.

When the

SPECT/2

[26] key is pressed, the

PROLINK-7

backs to its normal operation, the monitor displays the tuned frequency and the display indicates the value of the frequency or channel at the position of the cursor and the level measured at that point.

One of the applications of the

PROLINK-7

operating as spectrum analyser is in the search for the best orientation and position of the receiving antenna. This is particularly important i n UHF. Because such frequencies are involv ed, wit h wavelengths ranging from 35 cm to 65 cm, if the antenna is shifted only a few centimetres, the relationship between the picture, chrominance and sound carrier frequencies change, affecting the quality of the picture in the receiver.

If there is an excess of sound carrier, tearing or 'moiré' may appear on the screen due to the frequency beats between the sound, chrominance and the picture frequencies.

06/97 PROLINK-7

- 104 -

If there is a chrominance carri er def ect , then t he tel evision colour amplifier must function at maximum gain, which could result in noise appearing all over the television screen with points of colour that disappear when the saturation control is reduced; in an extreme case, loss of colour m ay occur.

4. 2. 7 Configuration me mory

To facilitate measurement, the

PROLINK-7

is able to store up to 99 configurations in an internal memory. In this way, it is possible to select the most common transmissions in a work area with their corresponding configurations quickly and easily.

If the battery is changed, the stored configurations are saved for an indefinite period. If not, the present configuration of the instrument is saved only as long as the battery remains connected.

The following parameters are stored in each configuration: the name assigned to the memory, band, frequency or channel number, the measurement units of the level, TV standard, supply voltage (VLNB), sound and type of measurement.

The different measuring configurations can be retrieved with the DATA LOGGER function, in order to conduct different data acquisitions in a completely automatic way and store them in the memory for later print-out or processing.

4. 2. 7 .1 Storing a configuration (ME M O R Y S T O R E)

To store a particular configuration, follow this procedure:

1. Input the parameters of the desired configuration in the

PROLINK-7

(frequency/channel, band, etc.).

2. Press the

START/STO

on the monitor. With the

[38] key. The

TUNE/SELECT

MEMORY STORE

screen will appear

[9] selector or using the numeric keyboard, select the memory number in which the configuration will be stored. During the process of adjusting the instrument, a single initial configuration is stored in all the memories by default.

If a configuration is stored in a memory location already containing inform ation, t hat da ta will be lost.

06/97 PROLINK-7

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3. Assign a name (label) to the memory location (optional). Press the [35] key. By turning the

TUNE/SELECT

[9] selector the different characters will appear cyclically in the first position of the configuration name. Once the first character is selected, press the

[35] key again and choose the

SHIFT

second character. Repeat this process up to a maximum of 4 characters. Once all the necessary characters have been selected, the user must press the

START/STO

key [38] to accept the name.

Figure 12.- MEMORY STORE

screen

SHIFT

4. Finally, press

START/STO

[38] and the configuration will be st ored. If a ny other k ey is pr essed, an er ror w ill be indic ated and the m emory will not be updated.

4. 2. 7 .2 R etrieving a configuration (ME M O R Y R E C ALL)

Press the

SEL/R CL

[39] key. The screen

MEMORY RECALL

will appear on the monitor which shows the different parameters of each measuring configuration stored. With the

TUNE/SELECT

to be retrieved (a number between 1 and 99). Pressing the

[9] selector or the numeric keyboard, select the configuration

SEL/R CL

[39] key again

will retr ieve the config uratio n.

Figure 13.- MEMORY RECALL

06/97 PROLINK-7

Screen

4.2.8 Selecting the attenuators

- 106 -

Press the

By turning the

TUNE/SELECT

[25] key. The selected attenuation will appear on the display.

ATT/1

[9] rotary encoder, the user can select the attenuation in the RF [7] input, from 0 to 80 dB in TV, or from 0 to 70 dB in SAT, in intervals of 10 dB. Press the

[25] key again to activate the selected attenuation.

ATT/1

There is an AUTO position which selects the most appropriate attenuation as a function of the input signal level, in order to centre the value of the reading in the optimum scale.

If the spectrum analyser mode (SPECTRUM) is selected, this key affects the reference level (see section 4.2.6.2).

WARNING

The use of the attenuator automatic selection mode, is limited by the signal

maximum level applied at the input of the equipment. If a sudden signal level

variation is produced at the RF input, and it is beyond the total signal levels of:

TV: 95 dBµV SAT: 105 dBµV

(typical values) the tune circuit may become out of control (PLL synthesized)

giving as a result wrong level readings.

If this situation occurs, disconnect the input signa l a nd se lect a n a ttenua tion of

60 dB or higher.

Similar effects can be observed when at the RF input appears an important

number of carriers with a high level. To be able to determinate the equivalent

level of a carrier group (w ith similar levels) at the RF input, it is possible to use

the expression:

Lt=L + 10 log N

Lt: total level L: average level of the carrier group N: number of carriers

So, if there are ten carriers wit h a l evel near to 85 dBµV, its equivalent level will

be:

85 dBµV + 10 log 10 = 95 dBµV

Observe that in this case if automatic attenuation mode is selected, loss of

tuning by overload of the RF input may occur besides other effects such as

tuner saturation and generation of intermodulation products that will mask the

spectrum visualization.

The global result of this effects is, in the automatic attenuation mode, the

difficulty to find the correct measurement scale or the presentation of incorrect

measurements.

06/97 PROLINK-7

4. 2. 9 Se lection of the sound mode

- 107 -

Press the

SOUND/4

alphanumeric display [14]. By turning the can chose the type of sound. Pressing the

[28] key. The selected sound mode will blink on the

TUNE/SELECT

SOUND/4

[9] rotary selecto r, the user

[28] key again activates the

selected sound type. The table 2 shows the possible values of the sound mode.

Type Function Band

4.50 Sound carrier 4.5 MHz above the picture carrier Terrestrial

5.50 Sound carrier 5.5 MHz above the picture carrier Terrestrial

5.74 Selects the second carrier in DUAL or STEREO transmissions, at 5.74 MH z of the picture carrier

5.80 Sound carrier 5.8 MHz above the picture carrier SAT

6.00 Sound carrier 6.0 MHz above the picture carrier Terrestrial

6.50 Sound carrier 6.5 MHz above the picture carrier Terrestrial

6.65 Sound carrier 6.65 MHz above the picture carrier SAT

7.02 Sound carrier 7.02 MHz above the picture carrier SAT

NTUN Narrow sound detection filter, 110 kHz Satellite BTUN B road sound detection filter, 240 kHz Terrestrial

Terrestrial

SAT

Satellite

NICA* NICAM decoding Terrestrial

AM AM demodulation FM/TER FM FM demodulation FM/TER

LV Tone whose frequency varies with the signal level All

OFF Suppresses the sound All

Table 2.-

When the LV function is selected, the speaker of the

Sound modes

PROLINK-7

emits a tone whose frequency depends on the level of the signal received. This is very useful when installing antennas, since the user can locate the peak signal without having to look continually at the display of the field meter, and therefore he can devote his full attention to the orientation process.

Selecting the AM and FM options enables the user to hear signals resulting

from AM or FM modulation.

06/97 PROLINK-7

- 108 -

When the

NICAM

option is selected on the display, information about the

NICAM type and the error rate will be sho wn in th is form at:

'N' + error + type

error = quality indication of the error rate:

"<": error rate < 1e-5 "5": 1e-5 < error rate < 1e-4 "4": 1e-4 < error rate < 1e-3 "3": 1e-3 < error rate < 2.7 e-3 ">": error rate > 2.7 e-3

type = NIC AM type:

"--": no NICAM is detected "du": dual NICAM "st": stereo NICAM "mo" mono NICAM

Therefore, for example, from the indication in figure 14 it has to be interpreted that NICAM sound is selected, the error rate is between 1 e-5 and 1 e-4 and the NICAM detected is dual.

Figure 14.-

4. 2. 1 0 E xterna l units power supply

The

PROLINK-7

can supply the voltage needed to power the external units

NICAM sound

(antenna preamplifiers, in the case of terrestrial TV, or LNB, in the case of satellite TV).

The

PROLINK-7

has two different operating modes, depending on whether or

not it supplies the external units.

RF input

From DC to 100 Hz 50 V rms (powered by the mains supply)

30 V rms (not powe red by the ma ins supply)

From 5 to 2150 MHz 130 dBµV

06/97 PROLINK-7

- 109 -

4. 2. 1 0. 1 E X powe r supply

In this operati ng mode the power supply of antenna preampli fiers (terrestri al TV) or the s atellite T V rec eiver ( dome stic or co mmu nity) supplies the external unit.

The

PROLINK-7

is connected in series in the line that links the external unit

and the satellite TV (do mestic) or SMATV

In this configuration, the EX supply mode of the external units to the

PROLINK-7 TUNE/SELECT

display [14]. Pressing again the

has to be used. For this, press the

[9] rotary selector until the EX mode appears on the alphanumeric

SEL V/8

mode.

heading

(community), as shown in figure 15.

SEL V/8

[32] key. Turn the

[32] key again activates the external supply

Figure 15.-

WARNING

W hen supplying the e xternal unit through the interna l unit, make sure tha t the

cable connected to the R F [6] connector corresponds to the interna l unit,

and that the RF [7] connector is connected to the external unit. If the

internal unit is connected to RF [7 ] a nd an exte rna l unit voltage is sele cte d,

the P R O LIN K -7 a nd th e in te rna l unit w ill be connecte d to the opposite powe r

supplies, which ma y dama ge one of the two pieces of e quipment.

06/97 PROLINK-7

EXT power supply of the external unit.

4. 2. 1 0. 2 I nterna l power supply

- 110 -

The

PROLINK-7

can supply the voltage needed to power the External Unit. In this case, the user can select several power voltages from the panel, depending on wheth er it is a terres trial or Sate llite band. The maximum load is 5 W, in continuous loading.

Type of T ele vision Power voltages

SATELLITE EXT, 13 V, 15 V, 18 V * TERRESTRIAL EX T, 13 V, 15 V, 18 V, 24 V

Table 3.-

Power voltages to the external unit.

* The supply voltages in Satellite allow to superpose a square signal of 22 kHz with

the object to realise switching functions.

This signal becomes active whe n you

sele ct the wa nted unde rlined voltage pola riza tion.

Figure 16.-

External unit power supplying by the

PROLINK-7

It is possible to supply the double band LNB's and the polarity switching LNB's

by changing the power voltage.

The

DRAIN

[8] indicator li ght s when current is f l owing to t he ext ernal unit . I f any kind of problem occurs (e.g., a short circuit), an error message appears on the display [14] and the instrument ceases to supply pow er. The

PROLINK-7

does not return to

its normal operating state until the problem has been solved.

When the

mA/V/7

[31] key is held down, the lower line of the display [14] indicates the real voltage and current being supplied to the external unit. This measurement is taken even when an external supply has been selected.

Figure 17.-

06/97 PROLINK-7

- 111 -

WARNING When the external unit is powered with one of these voltages, particulary 18 V or 24 V, it is not advisable for the instrument to function for more than thre e minutes non-stop. S ince the total consumption is very high, the duration of the battery charge is shortened considerably. It is advisable to disconnect the instrument when it is not taking mea sureme nts.

4.2.10.3 Selecting the voltage supplied to the external unit

Press the

SEL V/8

voltage supplied to the LNB or external unit. Press the

[32] key and use the

TUNE/SELECT

SEL V/8

[9] dial to select the

[32] key again to

activate the selected voltage.

4.2.11 Teletext

When the

[24] key is pressed, Teletext information appears on the

TXT/·

monitor if a transmitter with this information is tuned. The first page to appear on the screen is always page 100. If Teletext data is received, a counter located on the upper edge of the screen indicates the page that is being processed. Using the

SELECT

[9] selector the user can choose the page of Teletext to be displayed.

TUNE/

If the page requested is not included in the Teletext service of the transmitter, the sea rch will continue indefinitely. In such a situation the user can halt the search process, either by exi t i ng t he Telet ext func ti on t hrough the a new page number with the [9]

TUNE/SELECT

rotary selector.

[24] key or by entering

TXT/·

The Teletext function is especially valuable for the final optim ization process in TV installations. Any interference or reception through indirect beams generates digital in the digital information of the Teletext, which are highly visible as erroneous characters on the screen.

4. 2. 1 2 S e lection of advance d functions

The

FUNCT

[34] key gives access t o the adv anced function menu, as selection of TV standard, changing the units of measurement, channels table, bandwidth of the measuring filter, etc.

When the FUNCT [34] key is pressed the following menu appears on the

monitor.

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- 112 -

Function menu, first page.

[9] selector it is possible to mo ve th e cu r so r within

Through the

Figure 18.-

TUNE/SELECT

the different fields. To select a function, place the cursor on it and then press the

FUNCT

[34] key.

The

field gives access to the second page of the function menu.

Figure 19.-

Function menu, second page.

To exit the function menu, place the cursor on the

TUNE/SELECT

06/97 PROLINK-7

[9] rotary encoder. Then press the

FUNCT

[34] key.

field by using the

EXIT

- 113 -

4.2.12.1 Selection of the TV standard

This function allows the user to change the television standard. Different standards are available, depending on the band selected (terrestrial or satellite channels). To change the standard, press the

TUNE/SELECT

the

FUNCT

T erre stria l bands

B/G , D /K, I, L, M , N

S a te llite ba n d

ANL

[9] to position the cursor in the

key [34]. A pull-down menu will appear with the following options:

(digital channels), as shown in Figure 20.

DIG

(analogue channels),

(digital channels), as shown in Figure 21.

DIG

FUNCT

key [34]. Turn the rotary selector

TV STANDARD

field and then press

Figure 20.-

Figure 21.-

By turning the

Selection of the standard, terrestrial channels.

Selection of the standard, satellite channels.

TUNE/SELECT

desired standard. Press the

FUNCT

[9] rotary selector, the user can select the

[34] key again to confirm the standard.

06/97 PROLINK-7

The following table shows the features of the analogue terrestrial channel standards.

- 114 -

System Lines/

Table 4.-

frame B 625/50 7 MH z 5.5 MHz Neg FM D 625/50 8 MHz 6.5 MHz Neg FM G 625/50 8 MHz 5.5 MHz Neg FM H 625/50 8 MHz 5.5 MHz Neg FM

I 625/50 8 MH z 6.0 MHz Neg FM K 625/50 8 MH z 6.5 MHz Neg FM L 625/50 8 MHz 6.5 MHz Pos AM M 525/60 6 MH z 4.5 MHz Neg FM N 625/50 6 MHz 4.5 MHz Neg FM

Selectable terrestrial analogue standards and their characteristics.

Channel

Bandwidth

Video/sound

separation

Video mode

Audio mode

If a digital channel is selected, whether terrestrial or satellite, for the measurement of the level and the carrier-to-noise ratio to be correct, the bandwidth of the channel must be defined, using the

CHANNEL BW

function of the functions menu.

4.2.12.2 Selection of units of measurement (UNITS)

Press the cursor on the

FUNCT

[34] key and the units of measure menu will appear. The user can select the

FUNCT

UNITS

[34] key. The function menu will appear on screen. Place the

field by turning the

TUNE/SELECT

[9] rotary selector. Press the

units of measure, either dBµV, dBm, dBmV or linear units (µV, mV or V). Finally press the

FUNCT

[34] key again to select the desired option.

Figure 22.-

Selection of units of measurement.

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- 115 -

4.2.12.3 Selection of the channel set (CHANNEL SET)

Stored in standard form, the

PROLINK-7

has twelve sets of channels (four for terrestrial television and eight for satellite television ) so that the u nit can be adapted to the needs of each c ountry or selection area. See the channel-frequency tables in the A appendix at the end of this m anual.

Press the

FUNCT

on screen. By turning the

CHANNEL SET

function. By pressing the

[34] key to s el ect a channel s et. A f unct i ons menu will appear

TUNE/SELECT

[9] rotary encoder, place the cursor on the

FUNCT

[34] key, the menu of the available

channel set will appear.

By using the

set and finally press the

4. 2. 1 2. 4 S e lection of the me asuring bandw idth in spectrum mode (M E AS U RE BW )

TUNE/SELECT

FUNCT

With the spectrum analyser function in

[9] rotary encoder, place the cursor on the desi r ed

[34] key again to select the set.

SPAN VARIABLE

mode, it is possible to choose the bandwidth of the measuring filter betw een 100 kHz, 230 kHz and 1 MHz for the terrestrial bands and 4 MHz for the satellite band. For this, press the [34] key. The functions menu will appear on screen. By turning the rotary selector, place the cursor on the

FUNCT TUNE/SELECT

[34] key the measuring bandwidth selection menu will appear. With the

[9] rotary encoder place the cursor on the desired bandwidth (100 kHz,

MEASURE BW

function. By pressing the

TUNE/SELECT

FUNCT

[9]

230 kHz or 1 MHz for terrestrial channels and 100 kHz, 230 kHz or 4 MHz for satellite channels) and press the

FUNCT

[34] key to activate it.

For terrestrial television channels the default filter is the 230 kHz, while the

defau lt filter fo r satellite televisio n channels is 4 MHz.

: In the

Note

4.2.12.5 Selection of the NICAM channel (NICAM CHANNEL)

FU LL S P AN

1 MHz 4 MHz

function the measuring bandwidth is always in the terrestrial bands in the sa tellite band

With this function, the user can check NICAM sound modulations in stereo and

dual and select the sound channel emitted by the loudspeaker.

To do this, press the

By turning the

TUNE/SELECT

function. Press the

FUNCT

[34] key again. The channel emitted by the loudspeaker (A

[34] key. A functions menu will appear on screen.

[9] rotary encoder, place the cursor on the

NICAM

or B) is switched automatically.

4. 2. 1 2. 6 S e lection of the video polarity (S AT VI D EO P O L)

Press the

the

TUNE/SELECT

FUNCT

[34] key. The functi on menu will appear on sc reen. By turni ng

[9] rotary encoder, place the cursor on the

SAT VID EO POL

field. On the right-hand side there will be the polarity presently selected (positive or negative). To change the polarity, press the

FUNCT

[34] key.

This op tion co ncern s the re ceptio n on the SAT (satellite ) band.

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4 .2 . 1 2 . 7 F re q ue ncy of th e LN B lo ca l osc illa tor ( LNB LO C A L O S C )

This parameter must be defined in order to be able to tune in the satellite band in channel mode in accordance with the channel tables described in the A appendix at the end of this manual. To define it procedd as it follows: Press the The functions menu will appear on screen. By turning the selector, place the cursor on the

LNB LO C AL O S C

will be the frequency presently selected. If the

field. On the right-hand side there

FUNCT

TUNE/SELECT [

[34] key is pressed, that

FUNCT

[34] key. 9] rotary

frequency will be erase d and the user can assign a new frequency using the keyboard.

The frequency of the LNB local oscillator is expr essed in M Hz, with 5 fig ures for the whole part, a decimal point and a decimal (which acts as confirmation). For example, to select 9 GHz the number

9000,0

has to be entered.

This option concerns the reception of signals on satellite band.

4. 2. 1 2. 8 M e a suring bandwidth with digita l channels ( DI G IT AL C H BW )

The

PROLINK-7

permits the direct measurement of the power of the digital channels, as well as the carrier-to-noise ratio. If these measurements are to be correct, the bandwidth of the digital channel must be defined previously.

Press the

FUNCT

appear on screen. By turning the on the

DIGITAL CH BW

[34] key to establish the bandwidth. A function menu will

TUNE/SELECT

field and press the

[9] rotary selector, place the cursor

FUNCT

[34] key. Use the keyboard to enter the bandwidth in MHz of the digital channel (the activation is produced when entering the decimal figure).

This option affects the measuring of digital channels.

4.2.12.9 BEEP

This function allows the user to switch the audible indicator ON and OFF. To

do this, first press the

FUNCT

position the cursor in the

key [34]. Turn the rota ry selector

field and press the

BEEP

FUNCT

TUNE/SELECT

[9] to

key [34]. The operating

state of the audible indicator signal w ill switch a utom atically.

4.2.12.10 Automatic gain control (AGC M ODE)

This function allows the user to activate (ON) and deactivate (OFF) the automatic gain control. In this way the intermodulation of signals with a level greater than 85 dBmV is reduced. It is not possible to display the input level measurement in this functioning mode, since the gain of the tuner varies as a function of the input level.

The main purpose of this functioning m ode is to enable the user to improve the picture quality in situations when the tuner is near saturation.

To switch the selector

FUNCT

06/97 PROLINK-7

TUNE/SELECT

key [34]. The operating state of the AGC will sw itch a utoma tically.

on and off, press the

AGC

[9] to position the cursor i n the

FUNCT

AGC MODE

key [34]. Turn the rotary

field and press the

4.2.12.11 DATA LOGGER

- 117 -

The

DATA LOGGER

function all ows the user to carry out, st ore and/or print out up to 9801 measurements in a fully automatic way. It may be understood as a matrix whose columns address the 99 memories of measuring configurations and lines permit to store 99 measurements for every measuring configuration (conducted in different points of the system or in th e same point on d ifferent times).

Before to proceed to take measurements by means of the DATA LOGGER function it is necessary to store the measuring configuration/s in the memory by using the

MEMORY STORE

Press the menu will appear on screen. By turning the the cursor on the the

DATA LOGGER

function.

FUNCT

DATA LOGGER

[34] key to select the

screen will appear.

DATA LOGGER

TUNE/SELECT

field and press the

function. A function

[9] rotary encoder place

FUNCT

[34] key. Follow ing this,

Figure 23.-

DATA LOGGER screen

First of all, the user must indicate whether he wants to take measurements or to print them, or to do both at the same time. For this, press the

SHIFT

key [35] repeatedly (this is analogous to the tabulator in the Windows environment) until positioned in the

MEASURE

field. Then turn the rotary selector

TUNE/SELECT

[9] to activate (ON) or deactivate (OFF) the measurement function. The next step is to activate or deact i vat e the measurement pri nt i ng f unc ti on. To do t hi s, use t he [35] to position the cursor in the with the rotary se lector

TUNE/SELECT

field and activate it (ON) or deactivate it (OFF)

[9].

SHIFT

key

Secondly, select the des i red t i me interval i n whi ch t he measurements/print -out s have to be done. For this, press the to time (hh:mm) of the

INTE RVAL

SHIFT

field is activated. By turning the

rotary selector choose the hours. Then press the

[35] key several times until the part relat ive

[9]

SHIFT

TUNE/SELECT

[35] key again to access to

the minutes field and choose the desired number.

06/97 PROLINK-7

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The third operation is to activate the memory/ies or measurement configuration/s (that is, the frequency, the standard, the mode, the units of measurement, etc.) on which we want to take measurements. The heading of each column describes the most important parameters of each memory (measurement configuration), the name allocated to the memory location, the frequency, the units of measurement and the measurement mode (LEV, C/N, V/A or BER if the corresponding option is available). Use the

SHIFT

and then turn the rotary selector (memory). Activate i t or deactivate it with the

key [35] to position the cursor in the columns field

TUNE/SELECT

[9] to position it in the desired colum n

SEL/R CL

[39] key. The activated columns

are brighter than those that are not activated.

Finally, the user must select the row/s where he wants to store the measurements. For this, use the

SHIFT

row and activate it by pressing the

key [35] to position the cursor on the desired

SEL/R CL

[39] key.

To tak e the m easur emen ts, thr ee pos sibilities e xist:

a) Position the cursor on a column.

Te mpora l acquisition.

The measurements are taken on this memory (column) in all the rows that are activated. If no row has been selected, the error message 'NO ITEM SELEC TED ' will appear on the display.

b) Position the cursor on a row.

at the same time.

Acquisition of different types of measurements

The measurements are taken on this row in all the activated columns. If no column has been selected, the error m essage 'NO ITEM SELECTED' will appear on the display.

c) Place the cursor in the corner.

M ultip le a cquis itions .

The measurements are taken for all the rows and all the columns activated. If no item has been selected, the error message 'NO ITEM SELECTED' will appear on the display.

Once the user has defined all the parameters of the DATA LOGGER function and selected the measurements he wants to take, there are two methods of execution: immediate and scheduled.

Immediate execution

If the user wants to take the measurements (and/ or print them) immediately, he must press the

START/STO

key [38] to proceed to m easurement and storage. During the execution of the measurement, two arrows will appear in the upper left-hand corner of the array (the 'x' and 'y' coordinates direct the m easurement/printing in progress). To abort the DATA LOGGER operation, press the LOGGER function, press the

FUNCT

key [34].

FUNCT

key [34]. To exit the DATA

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Sche duled e xe cution

If the user wants to schedule the instrument to take the measurements (and/or print th em) at a pa rt icu la r t im e, he w ill h av e to schedule the alarm (see point 4.2.12.13 Alarm ). At the time set in the alar m, the instrum ent will pow er on (if it is off ), or will automatically switch to the DATA LOGGER mode (if it is on) in order to take or print the measurements. If the DATA LOGGER has been programmed to take more than one measurement in the time domain and if the logging interval is longer than four minutes, each time a measurement is logged, the instrument will reschedule the alarm for the next measurement and it will power on th ree m inutes ( t

) before the time

warm-up

defined in the Interval field, in order to ensure maximum accuracy. If the DATA LOGGER function is accessed while it is active, two blinking arrows (>>) will appear in the upper left-hand corner of the array. To exit the DATA LOGGER screen, the user must press the

FUNCT

key [34]. If any other key is pressed, the DAT LOGGER

functio n will abort.

This function has m ultiple applications, as equalizating channels in every outlet or measuring signal attenuation in every outlet.

Measuring the fluctuations in the signal level in one particular outlet (temporal acquisition)

. Define the interval between acquisitions ( 1h, for example) and activate such a number of lines that enables to carry out a study during 24 h (24 lines in the example). The obtained report will permit to guarantee a correct working of the system.

Equa lisation of channels in a pa rticular outlet (freque ntial a cquisition)

For this application a noise generator m ust be used. Activate several memories, each one with different measuri ng fr equenci es. For example, t o t est t he VHF band, for every one of the measuring modes (level, video/ audio, video / carrier), carry out a frequency sweeping from 45 to 450 MHz every 50 MHz.

4.2.12.12 Clock (CLOCK)

An internal clock permits to record date and hour of data acquisitions.

Access to the second page of the function menu to change the hour and select

the

CLOCK

key. The present data and hour will appear on the display. Press the the HOURS field will blink. Turn the Press the

menu using the

SHIFT

[35] key again to access to the remaining hours fields (MINUTES and

TUNE/SELECT

[9] rotary encoder and the

SHIFT

[9] rotary encoder to modify it.

FUNCT

key and

[34]

SECONDS) and set the value using the rotary encoder. Proceed in a similar way to modify the date (DAY-MONTH-YEAR). Once the date and hour are correct, press the

FUNCT

[34] key to validate them.

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4.2.12.13 Alarm

- 120 -

The

PROLINK-7

allows the user to define the time and date of the automatic power on and the data logging if the DATA LOGGER function has been activated. The alarm can be scheduled for a maximum of one year in advance.

Access to the second page of the function m enu to activate or deactivate the alarm and select the and the

FUNCT

[34] key. The display indicates whether the alarm is activated (ON) or

ALARM

menu by turning the

TUNE/SELECT

[9] rotary selecto r

not (OFF) as well as the date (DAY-MONTH) and time (HOUR-MINUTES-SECONDS ) selected. Press the

TUNE/SELECT

[9] rotary selector to change it. In order to modify the date and/or the

hour, press the

TUNE/SELECT

[9] rotary encoder until obtain the desired value. Once all the

SHIFT

parameters are correct, press the

4.2.12.14 Search level

[35] key and the ON-OFF field will blink. Turn the

[35] key until the field to modify blinks and turn the

FUNCT

[34] to validate them .

With this function it is possible to modify the threshold level of the station automatic search. Access to the second page of the function menu to modify this level. Place the cursor on the

SEARCH LEVEL

in use w ill be dis play ed . Pre ss t he

FUNCT

field. On the right side of the field the level

[34] and introduce a new level by using the alphanumeric keyboard. When the second figure is introduced the confirmation is produced automatically.

4.2.12.15 Frame

This function permits to modify the frame frequency. For this, access to the

second page of the function menu. At the right-hand side of the

FRAME

field appears the frame frequency presently in use. If the user wishes to modify this frequency, place the cursor on this field and press the

FUNCT

[34] key. Its value will change

automatically from 50 to 60 Hz or vice versa.

4.2.13 Direct access to functions

The

PROLINK-7

[36] and

[37] keys give access to any of the functions of the

. To establish the relation between the direct access key and a function,

access to the function menu, place the cursor on the desired function and press the

[36] or

[37] key. From now on, when one the

keys is pressed, the

access to this fu nction w ill be dir ect.

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4.2.14 Printing measurements or memories

By connecting the instrument to a printer it is possible to obtain a printed report of a sequence of measurements just at the m oment they are taken, or later, if they are recorded with the

DATA LOGGER

function. This enables the user to keep a file about the state of the system and provide the documents related to the level measurements for analysis purposes.

The installation process is reduced to connecting the printer, by means of the

connection cable provided, to the serial connector of the

PROLINK-7

. Before that,

switch off the pieces of equipment.

The serial connector is on the side-hand panel of the

PROLINK-7

, as it is

shown in the [45] connector in figure 3.

To print out the measurements press the

TUNE/SELECT

By pressing the

FUNCT

[9] rotary selector up to place the cursor on the

FUNCT

[34] key the

DATA LOGGER

screen will appear on screen.

[34] key, turn the

DATA LOGGER

field.

First, the printing field has to be activated. For this, press several times the

SHIFT

[35] key until place the cursor on the

field. Use the

TUNE/SELECT

[9]

rotary encoder to activate it (ON).

Select the desired measuring configuration (columns) as it is explained in the

section

4.2.12.11 DATA LOGGER

measure if it has been established) only pressing the necessary. When pressing the

and the lines (TEST POINT). To print out (and

START/STO

[38] key, if the cursor is in the 'corner' ,all

[38] key is

the measurements of the intersection with activated lines and columns will be printe d out. On the contrary, if only a measurement is required, when pressing the

START/STO

[38] key the cursor has to be on the corresponding line.

As example, the followi ng fi gure shows the outc ome of printi ng out t wo diff erent

measuring modes (<01> and <02>) with two lines activated (test points 1 and 2).

06/97 PROLINK-7

- 122 -

LOCATION: SIGNATURE:

DATE: TIME: TEST POINT: 1

<01> Ch -Meas.: LEVEL Frequency:615.25 MHz Level: 69 dBuV

<02> Ch -Meas.: LEVEL Frequency:621.25 MHz Level: 75 dBuV

DATE: TIME: TEST POINT: 2

<01> Ch -Meas.: LEVEL Frequency:615.25 MHz Level: 70 dBuV

<02> Ch -Meas.: LEVEL Frequency:621.25 MHz Level: 74 dBuV

Figure 24.-

4.2.14.1 Handshake and control lines

Next is described the handshake and control lines used by the

- The following parameters are used for printing through the serial port:

Rate: 19,200 bauds D a ta b its: 8 bits Parity: None Stop bits: 1

To modify the printer parameters see 4.2.14.2 CI-23 set-up.

Printing measurements.

PROLINK-7

06/97 PROLINK-7

- The control lines used are:

- DATA TRANSMIT (PROLINK-7 pin 3): To send data to the printer.

- CLEAR TO SEND (PROLINK-7 pin 8) : Data transfer control. Data are sent only when this line is active.

- DATA TERMINAL READY (PROLINK-7 pin 4) This line is permanently active in order to indicate the establishment of the communication.

Connections

- 123 -

The cable between the

connections:

PROLINK-7

Figure 25.- PROLINK-7

and the printer must have the following

RS-232C connector. Pins numbering.

06/97 PROLINK-7

4.2.14.2 CI-23 Set-up

- 124 -

This point explains how to m odify the

printer keyboard:

POWER LED

[1]

SET-UP

[2]

FEED

[3]

[4]

OFF

[5]

Figure 26.-

printer set-up. Figure 26 shows the

CI-23

CI-23 keyboard

To initiate the set-up mode push the

[1 ] PO WE R O N

[2] SET- UP

LED will flash u ntil set- up mode is turned off. The current param eter

and the

[4] ON

keys. The

status w ill be printe d. T he st atus of the DAT A BI TS p ara mete r will b e pr inted in ord er to modify it if necessary.

To select the status of the resting parameters (PARITY, BAUD-RATE,

COUNTRY, PRINT M ODE, AUTO-OFF, EMULATION and DTR) push the

[3] FE ED

key. These parameters are selected in a sequential way. To modify the status of any parameter push sequentially the

[2 ] SE T - U P

key. Example:

SERIAL BAUD RATE: 300, 600, 1200, 2400, 4800, 9600, 19200, 300...

[3 ] FE ED

When all the necessary changes have been made, push the

[2] SET-UP

keys to update the configuration of the printer. If no key is pressed for 15

and

seconds the set-up mode will be termin ate d without changing the original parameters.

06/97 PROLINK-7

- 125 -

The figure 28 shows a correct configuration for the CI-23 serial printer.

PROGRAMME-MODE

Present settings are:-

Data bits :- 8 Parity :- None Baud-rate :- 19200 Country :- U.K. Print mode:- Text Auto-off :- 5 Min. Emulation :- Standard DTR :- Normal

Figure 28.-

CI-23 configuration

06/97 PROLINK-7

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06/97 PROLINK-7

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5 DESCRIPTION OF THE INPUTS AND OUTPUTS

5. 1 R F input

The RF input is through the RF [7] connector on the front panel. The peak signal level should never exceed 130 dBµV. This is a BNC connector, and the input impedance is of 75 Ω.

5. 2 R F output

The RF output to the receiver or internal unit is the RF [6] connector on the front panel. This is a BN C connector, and the output impedance is of 75 Ω.

This connector allows the flow of a DC voltage from the internal unit which powers the LNB, without interrupting the RF. Therefore, it is possible to take measurements and still receive signals. The user must take account of the fact that at the output through this connector, the signal is attenuated in approximately 20 dB (see the specifications).

5. 3 I F O UT output

This is a 38.9 MHz IF output. It is a BNC connector, and the output impedance is of 75 Ω.

5. 4 C om posite video input

The composite video input is the VIDEO [1] connector on the front panel. This is a BNC connector and the input impedance of 75 Ω.

ATTENTION

M aximum le vel in this input should not surpass 3 V pp

5. 5 C om posite video output (BN C )

The composite video output is through the VIDEO OUT [42] connector on the side panel. This signal has a positive polarity and negative synchronisms, in a black level of 0 V. It is a BNC w ith an output impedance of 75 Ω.

WARNING

This signal should not be connecte d at any circuit points with voltage , only to

Ω

standard video signal inputs with 75

instrument as a result of ignoring this precaution is not covered in the warranty.

impedance. Any damage to the

06/97 PROLINK-7

5 .6 S a t e llite BB OU T o utpu t

- 128 -

Through this BNC connector located on the side panel of the

PROLINK-7

, a base band TV signal is obtained without eliminating the low frequency triangular modulation known as "Energy dispersal". This signal, obtained directly from the tuner is an appropriate D2-MAC detector circuit input. T he detector output can be introduced

in the VIDEO [1] video input to monitor the channel detected. This is a BNC connector, and the output impedance is of 75 Ω.

5. 7 E uroconne ctor (D IN E N 50049)

Figure 29.-

Euroconnector (external view).

Also known as SCART connector or PERITEL connector (in conformity with

standard NF-C92250). The signals in this connector are the following:

PIN No. SIGNAL CHARACTERISTICS

1 Right channel audio output 2 Right channel audio input 3 Left channel audio output 4 Audio grounding 5 Blue grounding (B) 6 Left channel audio input 7 Blue output (B) 8 Switching voltage (not connected) 9 Green grounding (G) 10 Digital bus interface (not connected) 11 Green output (G) 12 Digital bus interface (not connected) 13 Red grounding (R) 14 Digital bus reserved (not connected) 15 Red output (R) 16 Blanked signal (not connected) 17 Composite video grounding 18 Blanked return (not connected) 19 Composite video output 20 Video input 21 Connector shield grounding

Table 5.-

06/97 PROLINK-7

Description of the Euroconnector.

5.8 RS-232C Interface

- 129 -

Through the RS-232C connector it is possible the control of the

PROLINK-7

through a remote controller (personal computer), the printers connection, etc. The signals in this connector are described in Table 6.

Figure 30.-

PIN No. SIGNAL CHARACTERISTICS

RS-232C connector. External view.

1 Carrier detect (not connected) 2 Data Receive (RxD) 3 Data Transmit (TxD) 4 Data Transmission Ready (DTR) Fixed at +12 V 5 Connector grounding (GND) 6 Data Send Ready (DSR) (not connected) 7 Request to Send (RTS) 8 Clear to Send (CTS) 9 Ring Indicator (not connected)

Table 6.-

5. 9 H e a dphones output

Description of the RS-232C connector.

It is located on the side panel of the instrument and it is a Jack connector. The output is monaural except for the NICAM case, where the audition can be momo, stereo or dual, depending on the received NICAM. When this output is used, the speaker of the

PROLINK-7

is automatically deactivated.

If the user has selec ted the LV sound mode, a tone is emitted whose frequency depends on the level of the signal received. This is very useful when installing antennas, since the user can locate the peak signal without having to look continually at the display of the field meter, and therefore he can devote his full attention to the orientation process.

As a modulated signals monitor: the user can hear the signals resulting from AM or FM modulation by selecting the appropriate sound mode.

In both cases, control [4] enables the user to vary the sound volume.

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6 REMOTE CONTROL WITH A PC

6. 1 introduction

- 131 -

The design of

PROLINK-7

, based on a microprocessor, allows data to be exchanged between the equipment and a remote controller (personal c omputer) via an RS-232C connector. It is thus possible to obtain data as well as remote control of the

PROLINK-7

(measurement mode, sound type, attenuators state, etc) for maintenance

purposes and monitoring of installations.

6. 2 P rotocol for communication betwee n the P R O LIN K- 7 a nd a PC

This protocol is controlled by software and uses a RS-232C connector. Data and information are exchanged using messages consisting of ASCII alphanumerical characters. This method ensures easy carrying between different types of personal computers.

To ensure error-free communication between the two devices, the communication parameters of the series port must be selected on the Remote Controller (personal computer) as described in the follow ing lines:

Rate: 19200 bauds D a ta b its: 8 Parity: None Stop bits: 1

PROLINK-7

accepts remote commands at any time at which the instrument is on, except when in print mode. That is, it is not necessary to put the instrument in a special remote control mode; rather, this mode is selected immediately when it detects a complete command during the time necessary for its execution.

In normal circumstance,

PROLINK-7

transmits a XON code (code 11h) every second. The aim is to indicate to any possible remote device that the equipment is ready to receive data. The moment it receives a '*' character indicating the start of a remote command, the XON transmission stops until it receives a CR (carriage return, code 0Dh). At that moment,

PROLINK-7

understands that it has received a complete remote command, identifi es it and executes it. To indicate to the control equipment that it is in busy status, it sends a XOFF (code 13h).

If the command received is identified as valid, an ACK (acknowledge, code 06h) is transmitted and if not valid, a NAK (not acknowledged, code 15h) followed by a CR (carriage return, code 0Dh).

If the command has been recognised as valid, it is executed and the required response is returned (if the com mand so requires) followed by a new CR.

06/97 PROLINK-7

- 132 -

A typical communication chronogram would be as follows:

PC ( R emote controller) PR O LIN K- 7

1) <------ XON

2) *?BA<CR> ------>

3) <------ XOFF

4) <------ ACK

5) <------ *BA3<CR>

6) wait ...

7) <------ XON

In print mode, as the same port is used as for the data dump to the printer, all data received is rejected and no XON character is transmitted until leaving this mode.

Commands should always be sent in capital letter and cannot be edited on-

line, i.e., once a character is received it is stored in the

PROLINK-7

buffer and cannot

be rectified by sending an erase code.

Commands in remote control are divided into two groups, orders and interrogations. Order modify a variable or the equipment status. Interrogations respond with information concerning equipment status or the value of a variable. For interrogative command, it is necessary to add the character '?' after the '*' character.

6.3 Remote orders

NOTE 1: The (') character should not be sent; it is only included in the description in

order to define the string that makes up the remote command.

NOTE 2: The values given in small letter are parameters that change in value

depending on the function to be executed. These values are always decimal or hexadecimal ASCII characters. For example, t o t ransmit t he val ue " 1" , we must send the hexadecimal code 31 the corresponds to this character. Consult the text for acceptable value margins. The transmission of erroneous parameters or contradictory inform ation may cause

PROLINK-7

to stop operating correctly. In this case it is necessary to reset the equipment by momentarily switching it off.

06/97 PROLINK-7

- 133 -

'AG ' Se le cts / inte rrogate s the AG C m ode .

Syntax:

Selection: '*AGd<CR>' Interrogation: '*?AG<CR>'

Response: '*AGd<CR>'

Where:

: AGC Mode

= OFF

= ON

'AL' S e lects / interroga tes the a larm

Syntax:

Selection: '*ALd0hh:mm:ss,dd/mm<CR>' Interrogation: '*?AL<CR>'

Response '*ALd0hh:mm:ss,dd/mm<CR>'

Where:

=Alarm state

:On

:Off

: Hours (2 digits in decimal notation).

hh mm ss dd mm

Minutes (2 digits in decimal notation). Seconds (2 digits in decimal notation). Day (2 digits in decim al notation). Month (2 digits in decim al notation).

'AT'

S e lec ts / in terro ga te s the a tte nua tor v a lue .

Syntax:

Atte nua tor se le ction Atte nua tor inte rr oga tion

Response

Where:

= attenuator according to the following:

: 0 dB

: 10 dB

: 20 dB

: 30 dB

: 40 dB

: 50 dB

: 60 dB

: 70 dB

: 80 dB

: AUTO

Example:

*AT5<CR>

' Sets the attenuator to 50 dB.

*ATa<CR> *?AT<CR> *ATa<CR>

' ' '

06/97 PROLINK-7

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'BA'

S elects a nd/or interrogates the band.

Syntax:

Ba nd se lection Band interroga tion

Response

*BAb<CR> *?BA<CR> *BAb<CR>

Where:

= band associated to the frequency in accordance with the following:

: UHF

: VLO

: VHI

: FM

: IF

: SAT

: SUBBAND

Example:

*B5<CR>

' Sets the sate llite band

'BV ' I nte rrog ate s th e va lue of the ba tte ry vo ltag e

Syntax:

Interrogation '*?BV<CR>'

Response: '*BV[d

Where:

= Battery voltage level in tens of volt, in hexadecimal notation.

3d2d1

' ' '

] d0<CR>'

'BW' S elects / interrogates the measurement filter bandwidth

Syntax:

Se lection of the ba ndwidth '*BW b< CR > ' Inte rrogation of the bandw idth '*?BW < CR > '

Response: '*BWb<CR>'

Where:

= Measurement filter bandwidth

: 100 kHz

: 230 kHz

:4 MHz

:1 MHz

Example:

'*BW1<CR>'

Selects the 230 kHz measurement filter.

'CF' Activates / deactivates and interrogates the channel/frequency

mode

Syntax:

Selection: '*CFd<CR>' Interrogation: '*?CF<CR>'

Response: '*CFd<CR>'

Where:

d:1

= Frequency mode

= Channel mode

06/97 PROLINK-7

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'CH ' S e lects / interroga tes a te levision cha nne l

Syntax:

Cha nne l selection: '*C H c Cha nne l interrogation: '*?C H <C R > '

Response: '*CHc

Where:

= Channel (number it occupies on the list) in hexadecimal notation

c1c

: High nibble

: Low nibble

In the response, if

c='!!'

Indicates that the channel does not exist

Example:

'*CH01<CR>' '*?CH<CR>'

'*CH12<CR>'

Selects channel 1. The channel now selected is the 18 (in decimal notation)

'CI ' P rovides information on a cha nnel

Syntax

Interrogation '*?CIc

Where:

= Channel number (number it occupies in the list in

c1c

: H igh nibble

: Low nibble

= Set number (number that it occupes in the list in

s1s

: H igh nibble

: Low nibble

Re sponse 1: *C I !!< C R>

Re sponse 2: *C I l3l2l1l0 p3p2p1p0 [,m1m0dn..d0, m'1m'0d'n..d'0, ...] <CR>

Where:

= Channel name

l p3p2p1p

: High nibble

: Low nibble

[,m1m0dn..d0, m'1m'0d'n..d'0, ...]

m1m dn..d

hexadecimal notation)

The selected channel does not exist.

= PLL value (in hexadecimal notation)

= Commands associated with the

channel (the brackets '[' ']' mean that these are optional parameters).

: The command to execute

: The parameters associated to the command

<CR>'

1c0

<CR>

1c0

1c0 s1s0

<CR>'

Example:

'*?CI0000 <CR>'

Queries on channel 0 of the channel set 0

-> *CIE02S0572,ST0<CR>

Where:

= Channel name

E02S

= PLL value in hexadecimal

0572

= It has associated the B/G standard

ST0

06/97 PROLINK-7

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'CK' Se lects / interrogate s the hour a nd the da te

Syntax:

Selection: '*CKhh:mm:ss,dd/mm/aaaa<CR>' Interrogation: '*?CK<CR>'

Response '*CKhh:mm:ss,dd/mm/aaaa<CR>'

Where:

hh: mm: ss: dd: mm: aaaa:

Hours (2 digits in decim al notation). Minutes (2 digits in decimal notation). Seconds (2 digits in decimal notation). Day (2 digits in decim al notation). Month (2 digits in decim al notation). Year (4 digits in decim al notation).

'CW ' S elects / inte rroga te s the channe l bandwidth

Syntax:

Bandwidth sele ction: '* CW d Bandwidth interrogation: '*?C W <C R > '

Re sponse : '*C W d

Where:

= Filter bandwidth in kHz

: High nibble

: Low nibble

decenas

3d2d1d0

, in hexadecimal notation.

<CR>'

'DL'

Returns the measurements performed with the DATALOGGER.

Syntax:

Command: Response:

Where:

m1m

: High nibble

: Low nibble

t1t

: High nibble

: Low nibble

csl2l1l

Example:

(PC) (Prolink-7)

*?DLm1m0 t1t0<CR>

*DLcsl2l1l0<CR>

= (measured memory or DATA LOGGER matrix column in

hexadecimal notation)

= (measured test point or DATA LOGGER matrix row in

hexadecimal notation)

= M easured level (see the LV command format).

'*?DL0101<CR >' '*DL=+355<CR>'

(85.3dBµV for the level LEVEL case)

06/97 PROLINK-7

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'DS'

Act ivates / Deactivates or in di cates the state of t he memories and

the test points in the DATA LOGGER function.

Syntax:

Activation/Deactivation

Where:

= (memory or test point indication)

: Memory activation/deactivation (column of the DATA

LOGGER function)

: Test point activation/deactivation (row of the DATA

LOGGER function)

d1d

= (memory or test point number, in hexadecimal)

: High nibble

: Low nibble

: Activates

: Deactivates

Sta te interroga tion: '*?D S bd1d0<CR>

Response: '*DSs<CR>

Where:

bd1d

= (same format as in the activation/deactivation)

: Memory or test point activated

: Memory or test point not activated

'*DSbd1d0 s<CR>'

'FR'

Example '*DSM001<CR'

Activates the first memory in the Data Logger function.

S elects / interrogates the frequency (with the consequent change

of the ba nd if nece ssary) .

Syntax:

F requ ency se le ction Fre que ncy interrogation

Response

Where:

= band associated to the frequency according to the following:

: Satellite band

: Terrestrial band

: FM band

: Intermediate frequency (38.875)

d3d2d1d0 (d)

: High nibble

: Low nibble

= PLL hexadecimal divider

The synthesized frequency is related with the PLL divider according to the following expressions:

*FRbd3d2d1d0<CR> *?FR<CR>

*FRbd3d2d1d0<CR>

f (MHz) = 0.125d - 479.5 f (MHz) = 0.0625d - 38.875

for the satellite band

for the rest of the bands

all are decimal values)

(

Example:

*FRM0816<CR>

' Synthesizes the 90.5 MHz frequency in the FM band.

06/97 PROLINK-7

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'JI' P rovide s information on a se t of channels

Syntax: '*?JIs1s0<CR>'

Where:

= Set number (number which it occupies on the list) in

s1s0

hexadecimal notation

: H igh nibble

: Low nibble

Response1

Response2

'*JIl7l6l5l4l3l2l1l0t1t0bo4o3o2o1o0c1c0k3k2k1k0[,m1m0dn..d0,m'1m'0d'n..d'0,...]<CR>'

Where:

[,m1m0dn..d0, m'1m'0d'n..d'0, ...]

'*J I !! < C R > '

The requested channel set cannot be found

= Label (name) of the set of channels

= Channel number (hexadecimal notation)

t1t

: High nibble

: Low nibble

= The channelling band (code '7' = terrestrial band. For other

codes see the

o4o3o2o1o

o o

c1c0

c c

k3k2k1k

k k

= The va lue of th e LNB local os cillator ( hexadecimal)

: High nibble

: Low nibble

= The channelling identification code (hexadecimal).

: High nibble

: Low nibble

= The channelling checksum

: High nibble

: Low nibble

command).

'BA'

= Commands associated with the channelling

(the brackets [, ] mean that these are optional parameters).

: Command to execute

m1m0

: Parameters associated with the command

dn..d0

Example '*?JI00 <CR>'

Interrogates about the channel set 0

->*JICCIR 65T00000010274,LB0

Where:

= Channelling name

CCIR

= The number of channels in hexadecimal

= The channelling band (terrestrial).

T 00000

= H exadecimal value of the local oscillator o f the LNB

(in this case, as it is a terrestrial channel this parameter is irrelevant)

= Channel code

= Channel checksum

0274

= LN B = EX.

LB0

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'LB' Se lects/ interroga tes the e xterna l unit powe r supply

Syntax:

V olta ge S e le c tion: '*L Bl< C R > ' Voltage interroga tion: '*?LB< CR > '

Response: '*LBl<CR>'

Where:

0: EX 1: 13 V 2: 15 V 3: 18 V 4: 24 V 5: 13 V + 22 kHz 6: 15 V + 22 kHz 7: 18 V + 22 kHz

Example:

'*LB0<CR>'

Selects the external pow er supply.

'LO ' S e le cts / inte rro ga te s the va lu e of the L N B lo ca l osc illa tor.

Syntax:

Fre que ncy selection: '*LO d

4d3d2d1d0

Bandwidth interrogation: '*?LO <C R > '

Re sponse : '* LO d

4d3d2d1d0

Where:

= The value of the LNB local oscillator in hundreds of kHz, in

hexadecimal notation.

: High nibble

: Low nibble

This command is only operative in the satellite band.

<CR>'

'LV'

Provides the absolute level in decimals of dBµV (for the LEVEL

and DIGITAL CARRIER measurement mode) and in dB decimals

(i n t he VI DEO/AUDI O and CA RRIER NOISE RA TIO m easu r em ent

mode).

Syntax:

Command: '*?LV<CR>' Response

*LVcsl2l1l0<CR>

Where:

: Correct measurement

: Overrange

: Underrange

: Measurement can not be carried out

: Positive measurement

: Negative measurement

= Hexadecimal measurement in dBµV decimals (in the LEVEL

l2l1l

and DIGITAL measurement mode) or in dB decimals (in the VIDEO/AUDIO and CARRIER NOISE RATIO measurement mode).

: more significative nibble

: less significative nibble

Example

(PC) '*?LV<CR>' (Prolink-7) '*LV=+355<CR>' (85.3dBµV for the LEVEL case)

06/97 PROLINK-7

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'ME'

Selects / interrogates the measurement mode.

Syntax:

Measurement mode selection

M ea surem ent mode interroga tion

Response

*MEb<CR> *?ME<CR>'

*MEb<CR>

Where

b =

: Level measurement (LEVEL)

: Video to audio ratio measurement (V/A)

: Digital channel power measurement (DIGITAL CARRIER)

: Carrier to Noise ratio measurement mode

Example:

'*ME0<CR>'

Selects the level measurement mode

'N I' I nte rroga te s the va lue o f the e xte rna l unit cu rren t.

Syntax:

Interrogation '*?NI<CR>'

Response: '*NI[d

Where:

= external unit current in m A, in hexadecimal.

3d2d1

] d0<CR>'

'NL' Interrogates the value of the external unit voltage.

Syntax:

'*?NL<CR>'

Response: '*NL[d

3d2d1

] d0<CR>'

Where:

= external unit voltage in tens of volts, in hexadecimal notation.

'O F ' T u rns off the u nit

Syntax: '*OF<CR>'

'RC' Configurates the unit according to the contents of a program

memory

Syntax

M em ory se lection '*R C n

Where

The memory number in hexadecimal notation. The valid values are from 01h to 63 h (01 to 99 in decimal notation)

High nibble

Low nibble

1n0

06/97 PROLINK-7

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'SC ' Se le cts / inte rrogate s a cha nne l set

Syntax:

C ha nne l set se lection: '* S C s Cha nne l set interrogation: '*?S C <C R > '

Response: '*SCs

Where:

= Channel number (number that occupies it in the list) in

s1s

hexadecimal notation

: High nibble

: Low nibble

In the response of the channel set, if

Example:

'*SC 01<CR>' '*?CH <CR>' -> *CH00<CR>

= '!!' Indicates that the channel set does not exist or that it is not

activated.

Selects channel set 1. The channel set currently selected is the 0.

1s0

<CR>'

06/97 PROLINK-7

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'SO'

S elects / inte rroga te s the sound type.

Syntax:

Sound se lection: Sound type interrogation

Response:

Where:

= sound type according to the following:

0: AM sound

: FM sound

: LEVEL sound

: OFF sound

: TUNE (NARROW ) sound

: 4.50 sound

: 5.50 sound

: 5.74 sound

: 6.00 sound

: 6.50 (FM) sound

: 6.50 (AM) sound

: 5.80 sound

: 6.65 sound

: NICAM sound

: 7.02 sound

: TUNE (BROAD) sound

*SOtn2n1n0<CR>

*?SO<CR> *SOtn2n1n0<CR>

n2n1n0 (n)

For the TUNE option: PLL hexadecimal divider (between 5BEH

and 7B2H).

: High nibble

: Low nibble

The frequency is related with the PLL value according to:

f(MHz)=0.01n - 10.7

(all values in decimal notation)

For the Nicam case and as the equipment response:

= 0

: error="<"

: error="5"

: error="4"

: error="3"

: error=">"

: type="--"

: type="mo"

: type="st"

: type="du"

06/97 PROLINK-7

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'SP ' S e lects a nd inte rrogate s the spe ctrum

Syntax:

T o se t: '*S P d <C R > ' T o inte rroga te : '*? S P <C R > '

Response '*SPd<CR>'

Where:

= Spectrum mode OFF

d:1

= Spectrum mode ON

'SR ' S e lects / interrogate s the contents of a progra m mem ory

Syntax:

Selection

'*SRs

1s0t3t2t1t0

Interrogation

'*?SRs Response: '*SRs

1s0t3t2t1t0

Where:

= Number of the memory in hexadecimal

s1s

: High nibble

: Low nibble

= Memory label (name) in ASCII.

t3t2t1t

= Channelling band (code '7' = terrestrial band. For other

= T V standard (see the

c o3o2o1o

: High nibble

: Low nibble

= The channel/frequency mode (see the

= The channelling identification code (number it occupies on

v1v

k3k2k1k

: High nibble

: Low nibble

= Channelling identification code (hexadecimal).

n1n0

: High nibble

: Low nibble

= Measurement units (see the

= External unit power supply ( see the

= Measurement mode (see the

= F rame frequency (see the

= Sound type (see the

y z3z2z1z

: High nibble

: Low nibble

w3w2w1w0

: H igh nibble

: Low nibble

r4r3r2r1r0

: High nibble

: Low nibble

bco3o2o1o0fv1v0k3k2k1k0n1n0ulmxyz3z2z1z0w3w2w1w0r4r3r2r1r0<CR>'

<CR>'

1s0

bco3o2o1o0fv1v0k3k2k1k0n1n0ulmxyz3z2z1z0w3w2w1w0r4r3r2r1r0<CR>'

codes see the

= The value of the PLL divider in hexadecimal notation (see

the

command)

'FR'

comman).

'BA'

command).

'ST'

command)

'CF'

the list in hexadecimal).

= Channelling table checksum in hexadecimal notation (the

one which returns the

command)

'JI'

command)

'SO'

'UN'

'ME'

command)

'VP'

command)

'LB'

command)

= The value of the local oscillator of the sound subcarrier

frequency (see the

command)

'SO'

= Channel bandwidth in tens of kHz , in hexadec i mal not at i on.

= LNB local oscillator frequency in

centens

of kHz, in

hexadecimal

06/97 PROLINK-7

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'ST'

'SV'

S ele cts / inte rrogate s the T V sta nda rd.

Syntax:

Sta nda rd se le ction Sta nda rd interrogation

Response

*STs<CR> *?ST<CR> *STs<CR>

Where:

= (TV standard)

:B/G

:D/K

: DIGITAL

: ANALOGUE

Example:

*ST4<CR>

' Selects the M standard.

S e le cts / in te rroga t e s the s a te llite vide o pola riz a tio n.

'TV'

Syntax:

P ola rity se le ction : '* S V p< C R> ' Pola rity inte rrogation: '*?S V< C R >'

Response: '*SVp<CR>'

Where:

: Positive

: Negative

Example:

'*SV1<CR >'

Selects the po sitive sat ellite video polarization

S ele cts / inte rrogate s the T V m ode .

Syntax:

T V m ode sele ction TV mode interroga tion

Response

Where:

= (TV mode)

: TV_OFF

: TV

: TV+LV

: TV+LV+SYNC

: LV

*TVt<CR> *?TV<CR> *TVt<CR>

Example:

*TV2<CR>

06/97 PROLINK-7

' Selects the TV+LV mode

- 145 -

'TX ' S ele cts the tele xtext.

Syntax:

a ) T o activa te the te le te xt: '*T X d

2d1d0

b) To deactivate the teletext: '*TX000<CR>

Where:

: Page (in hexadecimal notation)

: high nibble

: low nibble

Example:

'*TX64<CR>'

Activates the teletext and sets page 100 (in decimal notation).

'U N ' S e lec ts / inte rro ga te s the me a sure m e nt units

Syntax:

Units selection '*UNu<CR>' Units interrogation '*?UN<CR>'

Response: '*UNu<CR>'

<CR>'

'VE'

Where:

= (units)

: dBµV

: dBmV

: dBm

: Lin

Example:

'*UN0<CR>'

Selects the dBµV units.

R e turns th e v e rsion.

Syntax:

Interrogation: '*?VE<CR>'

Response

Where:

m4m3m2m1m0/s4s3s2s1s

= Corresponds to a character string w hich indicates

the version.

Example:

(PC) '*?VE<CR>' (Prolink-7) '*VE2.08 / 1.03<CR >'

*VEm4m3m2m1m0/s4s3s2s1s0CR>

06/97 PROLINK-7

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'V P ' S e le c ts / inte rro ga te s th e fra me fr e que n cy for the sa te llite b a nd

Syntax:

F requ en cy sele ction: '* V P d< C R >' Fre que ncy interrogation: '*?V P< C R >'

Response '*VPd<CR>'

Where:

= (frequency)

: 50 Hz

: 60 Hz

NOTE:

The

PROLINK-7

it only w ill accept th e options described in this paragraph if they are compatible with its state. For example if you try to fix the sound to 5.5 when you have selected previously the FM band, you will obta in as an an sw er a 'NO T AC KN O W LE DG E' c ode.

incorporates a system to detect incompatible options and so

06/97 PROLINK-7

7 MAINTENANCE

7.1 Replacing the fuses

7.1.1 Replacing the mains fuse

The fuse compartment is placed in the mains base (see fig. 3).

To substitute the fuse disconnect the power cord.

With an appropiate screwdriver remove the fuse compartment cover.

- 147 -

Substitute the melt fuse for another of

7. 1. 2 Inte rnal fuses which user ca nnot repla ce

F1 DC/DC conversor

F1 Battery charger

7.2 Replacing the Battery

6 A - T - 250V 2 A - F - 250V

2.5 A - F - 250 V

The average life of the battery is 4 years if it has been kept in optimum operating conditions. Therefore, it must be replaced every four years or whenever the capacity of the fully-charged battery is noticeably diminished. To change the battery, follow the procedure indicated in figure 31.

Figure 31.-

Replacing the battery.

- Remove the attachment screws from the top cover of the battery compartment which is located in the rear of the device.

- Remove the battery compartment cover.

06/97 PROLINK-7

- Remove the screw from the attachment flange of the battery and take it out.

- Disconnect the connection terminals of the battery and replace it with a new one. Take care with the polarity (red-positive, black-negative) of the terminals.

WARNING Avoid any type of short circuit among the cables connected to the battery, since the re sulting high current may ca use se rious dama ge to the instrument.

- Insert the attachment flange again and tighten the screw.

- Replace the rear cover and attach it with the corresponding screws.

7.3 Cleaning the cover

To cle an the cover, take care the instrument is disconnected

- 148 -

CAUTION

Do not use scented hydrocarbons or chlorized solvents. Such products may a ttack the pla stics use d in th e c onstructio n of the cove r.

The cover should be cleaned by means of a light solution of detergent and

water applied with a soft cloth.

Dry thoroughly before using the system again.

06/97 PROLINK-7

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TABLE OF CONTENTS

1 GENERAL INFORMATION ...................................... 77

1.1 Description .............................................. 77

1.2 Specifications ............................................ 79

2 SAFETY RULES .............................................. 83

3 INSTALLATION .............................................. 85

3.1 Power Supply ............................................ 85

3.1.1 Operating on the electrical mains supply ..................... 85

3.1.2 Operating on the battery................................. 85

3.1.2.1 Charging the battery ................................ 86

3.2 Installation and start-up ..................................... 86

4 OPERATING INSTRUCTIONS .................................... 87

4.1 Description of the controls and elements ......................... 87

4.2 Using the PROLINK-7 ...................................... 97

4.2.1 Selection of the RF band ................................ 97

4.2.2 Automatic transmission search ............................ 97

4.2.3 Frequency selection .................................... 98

4.2.4 Channel selection ...................................... 98

4.2.5 Measuring mode selection ............................... 98

4.2.6 Selection of the TV mode ................................100

4.2.6.1 Operation in SYNC mode ............................ 101

4.2.6.2 Operation as a spectrum analyzer ......................102

4.2.7 Configuration memory................................... 104

4.2.7.1 Storing a configuration (MEMORY STORE) ...............104

4.2.7.2 Retrieving a configuration (MEMORY RECALL) ............105

4.2.8 Selecting the attenuators ................................ 106

4.2.9 Selection of the sound mode ..............................107

4.2.10 External units pow er supply .............................. 108

4.2.10.1 EX power supply ..................................109

4.2.10.2 Internal power supply .............................. 110

4.2.10.3 Selecting the voltage supplied to the external unit ..........111

4.2.11 Teletext ............................................ 111

... / ...

06/97 PROLINK-7

- 76 -

... / ...

4.2.12 Selection of advanced functions ...........................111

4.2.12.1 Selection of the TV standard ......................... 113

4.2.12.2 Selection of units of measurement (UNITS) ............... 114

4.2.12.3 Selection of the channel set (CHANNEL SET) ............. 115

4.2.12.4 Selection of the measuring bandwidt h in spectr um mode (MEASURE

BW) ...............................................115

4.2.12.5 Selection of the NICAM channel (NICAM CHANNEL) ........115

4.2.12.6 Selection of the video polarity (SAT VIDEO POL) ..........115

4.2.12.7 Frequency of the LNB local oscillator (LN B LOC AL OS C) .... 116

4.2.12.8 Measuring bandwidth with digital channels (D IGITAL CH BW) . 116

4.2.12.9 BEEP ..........................................116

4.2.12.10 Automatic gain control (AGC MODE) ..................116

4.2.12.11 DATA LOGGER .................................117

4.2.12.12 Clock (CLOCK) ..................................119

4.2.12.13 Alarm ......................................... 120

4.2.12.14 Search level ....................................120

4.2.12.15 Frame ........................................120

4.2.13 Direct access to functions ...............................120

4.2.14 Printing measurements or memories ....................... 121

4.2.14.1 Handshake and control lines ......................... 122

4.2.14.2 CI-23 Set-up.....................................124

5 DESCRIPTION OF THE INPUTS AND OUTPUTS .....................127

5.1 RF input ................................................127

5.2 RF output ............................................... 127

5.3 IF OUT output............................................ 127

5.4 Composite video input ...................................... 127

5.5 Composite video output (BNC) ................................127

5.6 Sa tellite BB OUT outpu t .....................................128

5.7 Euroconnector (DIN EN 50049) ............................... 128

5.8 RS-232C Interface ......................................... 129

5.9 Headphones output ........................................ 129

6 REMOTE CONTROL WITH A PC .................................131

6.1 introduction ..............................................131

6.2 Protocol for communication between the PROLINK-7 and a PC ........131

6.3 Remote orders ........................................... 132

7 MAINTENANCE ..............................................147

7.1 Replacing the fuses ........................................ 147

7.1.1 Replacing the mains fuse ................................ 147

7.1.2 Internal fuses which user cannot replace .....................147

7.2 Replacing the Battery .......................................147

7.3 Cleaning the cover ......................................... 148

APPENDIX A: Channel-frequency tables ............................. 225

06/97 PROLINK-7

Promax PROLINK-7 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual