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Multi-Standard Analogue TV Demodulator

Showman 1000

Operation



2008 dB Broadcast Ltd

32

Provisional Version 0.3

There are four Audio Output connectors, grouped into two pairs – Audio 1 (Left and Right)
and Audio 2 (Left and Right). Separate menus control Audio Preference and Audio Volume
for each pair. Audio Preferences control the routing audio between the audio decoder stages
and the Audio Outputs.

For example, if Nicam stereo and FM mono are being decoded, then the Audio Preference
menus could set

Audio 1

to carry the stereo signal and

Audio 2

, the mono signal. If

Dual

Languages

are being broadcast and

Audio 2 Preference

is set to L: Stereo R: Stereo, then

Language A

will appear on Audio 2 Left output and Language B on Audio 2 Right output.

However preference could be set such that only

Dual A

or only

Dual B

appears on both left

and right Audio 2 outputs. Stereo broadcasts would be unaffected by the Dual preference
setting. Audio Preferences are only preferences - the actual outputs will depend upon what is
being broadcast.

The factory default Audio Volume setting (indicated by an * in the top right-hand corner of the
Audio Volume menu display) is set to give approximately 0dB gain between transmitter audio
input and the Showman 1000 audio output. The output level provided may not suit all
operators, in which case the Audio Volume menu may be used to set and store other levels.

Audio 1 Preference

From DEFAULT:

Press <ENTER>

▼ <ENTER> <ENTER> to view the current Audio 1 Preference.

Press

▲ or ▼, to view or select another preference.

Press <ENTER> to accept or <ESCAPE> to reject the selection.

Audio 2 Preference

From DEFAULT:

Press <ENTER>

▼ <ENTER> ▼ <ENTER> to view the current Audio 2 Preference.

Press

▲ or ▼, to view or select another preference.

Press <ENTER> to accept or <ESCAPE> to reject the selection.

Note:

The Audio Preference choice differs between Showman 1000 variants and is also TV

Standard dependant.

Audio 1 Volume Set

From DEFAULT:

Press <ENTER>

▼ <ENTER> ▼ ▼ <ENTER> to view the current Audio 1 Volume

setting.

Press

▲ or ▼ to raise or lower the volume.

Press <ENTER> to accept or <ESCAPE> to reject the selection.

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Содержание Showman 1000

Страница 1: ...Showman 1000 Multi Standard Analogue TV Demodulator Handbook Provisional Version 0 3...

Страница 2: ...plied for information purposes only and does not constitute any form of warranty or guarantee All trademarks acknowledged The information in this document is subject to change without notice dB Broadc...

Страница 3: ...tor Showman 1000 2008 dB Broadcast Ltd iii Provisional Version 0 3 D Do oc cu um me en nt t h hi is st to or ry y Date of first publication 30 th May 2008 Current issue and date Provisional Version 0...

Страница 4: ...1 Mechanical Installation 11 Rear Panel Connectors 12 RS232 serial control port 13 Reset Status port 13 Audio outputs phase connections 15 GETTING STARTED 16 Using the front control panel 16 OPERATION...

Страница 5: ...Multi Standard Analogue TV Demodulator Showman 1000 2008 dB Broadcast Ltd v Provisional Version 0 3 APPENDIX F CHANNEL TABLES 60 SPECIFICATION 68 ORDERING INFORMATION 71...

Страница 6: ...or later analysis The P Variant is also capable when receiving BTSC audio Standard M of providing simultaneous outputs of both Stereo and SAP Second Audio Program Demodulation is to base band colour c...

Страница 7: ...y 99 program memory Headphone socket on front panel Dual composite video outputs Dual audio outputs Adjustable audio video and chrominance levels RS232 Port for external local control and software upg...

Страница 8: ...fication chapter for further environmental physical certification and safety information Do not operate in wet or damp conditions Do not operate in an explosive atmosphere Power cable Use only a power...

Страница 9: ...only be performed by a skilled and competent technician or by returning to db Broadcast for repair CAUTION Danger of explosion if battery is incorrectly replaced Product damage precautions Take anti s...

Страница 10: ...ground such as phase to phase on multiphase systems must not be used as power sources A protective ground connection by way of the grounding conductor in the power cord is essential for safe operatio...

Страница 11: ...rked N or coloured blue or black Connect the GREEN YELLOW wire to the terminal marked E or or coloured green and yellow or green The plug fitted should contain a 3 Amp fuse protecting the BROWN wire A...

Страница 12: ...at 4 5MHz 5 5MHz 6 0MHz or 6 5MHz A secondary sound carrier S2 used for stereo or dual language mode may also be present S1 output level 9dBm nominal for RF Input 66dB V RESET STATUS Optional 9 way D...

Страница 13: ...he Showman 1000 to be hardwired for local monitoring for status checking and where necessary to trigger an alarm or external reset Table 3 Reset Status port pinout PIN Signal Comments 1 Signal Ground...

Страница 14: ...ected For normal operation Relay 1 is energised and pins 2 and 6 are connected Non critical Alarm A non critical alarm see below indicates a recoverable fault In this state the Relay 2 is de energised...

Страница 15: ...y of a 9 way D SUB connector The mating female plug may be a simple 3 5mm pitch MINI COMBICON type non D SUB profile where positive cable retention is not deemed necessary If cable retention is requir...

Страница 16: ...ue background The contrast is menu adjustable Cursor Keys The Cursor Keys are used to navigate around display items or to change menu settings The Cursor Keys are represented in this manual by the sym...

Страница 17: ...elevision RF signal of between 46 and 80dB V 0 2 and 10mVrms to the RF IN connector Note The T V standard and frequency channel of the RF signal must Showman 1000 settings 3 Setting or checking the TV...

Страница 18: ...tion Press ESCAPE again to return to DEFAULT With the above I F signal applied between five and ten segments of the IF LEVEL bar graph should be solid Note For information on how to change other setti...

Страница 19: ...eo audio monitoring system to either the Audio 1 or Audio 2 output pair Note These 3 pin audio output pairs supply electronically balanced low impedance line level signals designed to feed into 600 or...

Страница 20: ...phone Options menu Press to select the Headphone Options Audio Source menu Press ENTER to select Audio Source Press or to select between monitoring Audio 1 or Audio 2 Press ENTER to accept or ESCAPE t...

Страница 21: ...ed Guide for basic operation or to find help with using the unit for the first time There are several user configurable settings stored in non volatile memory which can be adjusted either from the fro...

Страница 22: ...r the region of operation see below Also displayed are S1 and S2 which give the status of any sound carriers detected S1 Yes indicates that the primary FM or AM carrier is detected S2 Yes indicates th...

Страница 23: ...Options menus detailed below Figure 4 Main Menus Note Some menu items may not be available on certain Showman 1000 variants To access the Main Menu Press ENTER when at DEFAULT or at any Top Level Moni...

Страница 24: ...0 3 Receiver Options Menu Use this menu to find out how to Select a Channel Table for the country or region of operation Configure a User Defined Table Operate Channel Autosearch Select a Channel Numb...

Страница 25: ...TV Demodulator Showman 1000 Operation 2008 dB Broadcast Ltd 25 Provisional Version 0 3 Figure 6 Receiver Options sub menus These Receiver Option menus follow on from the Set User Table Std menu and th...

Страница 26: ...and then assign a TV Standard to the whole table Note The whole table must be on a common TV Standard Setting Channels From DEFAULT Press ENTER ENTER ENTER On LCD view Set User Table with a flashing...

Страница 27: ...alogue T V channels present at the RF Input of Showman 1000 and present them as a series of Programs available for quick selection from DEFAULT The Auto Search feature should only be used once the cor...

Страница 28: ...bove in Channel Auto Search how Programs could be accessed directly from the DEFAULT page Individual programs may also be stored with Channels or Frequencies from a mix of TV Standards To create a pro...

Страница 29: ...Frequency is changed via the Receiver Options menu The Stored Programs can be recalled to the DEFAULT page as follows From DEFAULT Press ENTER ENTER ENTER Press ENTER to load all stored programs or E...

Страница 30: ...dcast Ltd 30 Provisional Version 0 3 Audio Options Menu Showman 1000 is capable of demodulating most of the world s broadcast TV stereo audio standards These include Nicam FM Stereo also known as A2 T...

Страница 31: ...Multi Standard Analogue TV Demodulator Showman 1000 Operation 2008 dB Broadcast Ltd 31 Provisional Version 0 3 Figure 8 Audio Options menu BTSC P Variant Figure 9 Audio Options menu BTSC S Variant...

Страница 32: ...ences are only preferences the actual outputs will depend upon what is being broadcast The factory default Audio Volume setting indicated by an in the top right hand corner of the Audio Volume menu di...

Страница 33: ...Operation 2008 dB Broadcast Ltd 33 Provisional Version 0 3 Audio 2 Volume Set From DEFAULT Press ENTER ENTER ENTER to view the current Audio 2 Volume setting Press or to raise or lower the volume Pres...

Страница 34: ...ation 2008 dB Broadcast Ltd 34 Provisional Version 0 3 Configuration Options Menu This menu is for configuring ancillary functions within Showman 1000 Some options may not be available on certain Show...

Страница 35: ...l Press ENTER ENTER to Set the RF Alarm Level Press ESCAPE ESCAPE to return to DEFAULT Video Output Level The video output level is factory set to provide a nominal value of 700mV 100IRE for M N Stand...

Страница 36: ...V or 40IRE for M N Standard when terminated in 75 This may be adjusted via the Configuration Option Chroma Output Level menu WARNING Adjusting the Chroma Output Level affects all Channels and Standard...

Страница 37: ...g Options AFC Control Press ENTER Press or to select AFC On or Off as required Press ENTER to accept or ESCAPE to reject the selection Press ESCAPE ESCAPE to return to DEFAULT Tuner Gain This function...

Страница 38: ...adjusted by pressing or as required This Headphone Volume display may also be reached via the menu system as described below Headphones monitor either Audio 1 or Audio 2 outputs the selection being m...

Страница 39: ...tory defaults Some options are not available on certain Showman 1000 variants Figure 12 System Options menu To enter the System Options menu from DEFAULT Press ENTER ENTER Press or to cycle the displa...

Страница 40: ...ptimum contrast Press ENTER to accept or ESCAPE to reject the selection Press ESCAPE ESCAPE to return to DEFAULT Set Time and Date From System Options Set Time and Date Press ENTER Press or to highlig...

Страница 41: ...IT NOT OPERATING AS INTENDED See System defaults Table 14 System default settingsfor details of the functions that are reset and their default values From System Options Set Factory Defaults Press ENT...

Страница 42: ...power supplies are within operational limits Figure 13 Status Options menu To enter the Status Options menu from DEFAULT Press ENTER ENTER Press or to cycle the display through the following Status Op...

Страница 43: ...ss ENTER The LCD will display the status of the main power supplies Press ESCAPE ESCAPE to return to DEFAULT Temperature From Status Temperature Press ENTER The LCD will display the internal temperatu...

Страница 44: ...tems The CLI may be accessed with a standard terminal emulation program such as HyperTerminal running on a PC The RS232 connector is a 9 pin sub miniature D type with female contacts Note See the Inst...

Страница 45: ...13 One of two responses is returned to a Set command OK Command implemented successfully COMMAND ERROR Command was not recognized e g To set frequency to 663 25 MHz the command format is Command FREQ...

Страница 46: ...X 1 for audio output 1 X 2 for audio output 2 Returns AUDPREFX Std Left Right Set Command AUDPREFX X 1 for audio output 1 X 2 for audio output 2 Parameter 0 5 see Table 6 Table 7 and Table 8 Returns O...

Страница 47: ...reo Stereo 2 Dual A Dual A 3 Dual A Dual B 4 Dual B Dual B Table 7 Audio Preference Settings BTSC for S Variant Parameter L R 0 Mono Mono 1 Stereo Stereo 2 Mono SAP 3 SAP SAP Table 8 Audio Preference...

Страница 48: ...Examples Command CHANNEL Returns CHANNEL E39 Command CHANNEL E66 Result Unit tuned to channel E66 CHROMA Sets or requests the Chroma level Request Command CHROMA Returns 00 minimum level 23 maximum l...

Страница 49: ...d valid COMMAND ERROR if command invalid Examples Command DATE Returns DATE 19 05 04 Command DATE 19 05 04 Result Unit date set to 19th May 2004 Note The date format for set and request depends on the...

Страница 50: ...ns FREQ 560 50 Command FREQ 658 25 Result Frequency set to 658 25 MHz GROUP Sets or requests the Group Delay setting Request Command GROUP Returns ON FLAT Set Command GROUP Parameter ON FLAT Returns O...

Страница 51: ...et Command LOG Clears status log Returns OK if command valid COMMAND ERROR if command invalid Examples Command LOG 5 Returns LOG 5 18 14 06 05 08 04 5V SUPPLY FAILURE Command LOG Result Status log cle...

Страница 52: ...ns MODEL SHOWMAN 1000S MODEL SHOWMAN 1000P Example Command MODEL Returns MODEL SHOWMAN 1000S MUTE Sets or requests the Video Mute option Request Command MUTE Returns MUTE ENABLED MUTE DISABLED Set Com...

Страница 53: ...Requests the current NICAM BER measurement Request Command NICAM Returns NICAM ber Nicam BER measurement in e notation Examples Command NICAM Returns BER 4 78e 03 Note If no Nicam signal is present th...

Страница 54: ...AM Returns PROGRAM 10 Note The unit is not necessarily set to this program The command returns the latest or default program setting Set Command PROGRAM Parameter 01 99 Returns OK if command valid COM...

Страница 55: ...D Returns STANDARD video audio Example Command STANDARD Returns STANDARD M N M BTSC Note Possible Video Audio standards are detailed in Error Reference source not found The video standard is dependent...

Страница 56: ...en defined COMMAND ERROR will be returned Examples Command TABLE Returns TABLE Europe Air Command TABLE 05 Result Channel table New Zealand Air selected Table 12 TABLE Command Video and Audio standard...

Страница 57: ...nd TIME Returns TIME 13 03 49 Command TIME 17 10 15 Result Unit time set to 17 10 15 TUNEMOD Requests the tuning mode i e whether the unit is tuned by channel or by frequency Request Command TUNEMOD R...

Страница 58: ...2 Set Audio Output 2 volume Parameter 00 32 Returns OK if command valid COMMAND ERROR if command invalid Examples Command VOL1 Returns VOL1 10 Command VOL2 25 Result Audio 2 level set to 25 USERSTD Se...

Страница 59: ...Default setting Input Source RF Channel E21 Frequency 471 25MHz Channel Table Europe Air UHF Std I Tuning Mode By Channel Audio 1 Preference L Stereo R Stereo Audio 2 Preference L Mono R Mono Audio 1...

Страница 60: ...9 615 25 E52 719 25 E65 823 25 E27 519 25 E40 623 25 E53 727 25 E66 831 25 E28 527 25 E41 631 25 E54 735 25 E67 839 25 E29 535 25 E42 639 25 E55 743 25 E68 847 25 E30 543 25 E43 647 25 E56 751 25 E69...

Страница 61: ...25 29 567 25 45 663 25 61 759 25 14 477 25 30 573 25 46 669 25 62 765 25 15 483 25 31 579 25 47 675 25 16 489 25 32 585 25 48 681 25 Table 20 USA AIR VHF UHF Standards M N Chan fv MHz Chan fv MHz Cha...

Страница 62: ...25 16 133 25 43 337 25 77 541 25 116 745 25 17 139 25 44 343 25 78 547 25 117 751 25 18 145 25 45 349 25 79 553 25 118 757 25 19 151 25 46 355 25 80 559 25 119 763 25 20 157 25 47 361 25 81 565 25 12...

Страница 63: ...114 40 318 74 522 113 726 14 120 41 324 75 528 114 732 15 126 42 330 76 534 115 738 16 132 43 336 77 540 116 744 17 138 44 342 78 546 117 750 18 144 45 348 79 552 118 756 19 150 46 354 80 558 119 762...

Страница 64: ...127 25 42 331 25 76 535 25 115 739 25 16 133 25 43 337 25 77 541 25 116 745 25 17 139 25 44 343 25 78 547 25 117 751 25 18 145 25 45 349 25 79 553 25 118 757 25 19 151 25 46 355 25 80 559 25 119 763...

Страница 65: ...5 2 64 25 30 541 25 45 646 25 60 751 25 3 86 25 31 548 25 46 653 25 61 758 25 4 95 25 32 555 25 47 660 25 62 765 25 5 102 25 33 562 25 48 667 25 63 772 25 5A 138 25 34 569 25 49 674 25 64 779 25 6 175...

Страница 66: ...E5 175 25 S28 359 25 E32 559 25 E57 759 25 E6 182 25 S29 367 25 E33 567 25 E58 767 25 E7 189 25 S30 375 25 E34 575 25 E59 775 25 E8 196 25 S31 383 25 E35 583 25 E60 783 25 E9 203 25 S32 391 25 E36 59...

Страница 67: ...25 4 77 25 19 519 25 34 679 25 49 799 25 5 85 25 20 527 25 35 687 25 50 807 25 6 168 25 21 535 25 36 695 25 51 815 25 7 176 25 22 543 25 37 703 25 52 823 25 8 184 25 23 551 25 38 711 25 53 831 25 9 19...

Страница 68: ...nput Frequency Vision Carrier 38 9 MHz Level 35 4 27 10 7 100 dBm mV Impedance 50 Return Loss Ratio VSWR 30 1 07 dB Ratio IF Output Frequency Vision Carrier 38 9 MHz Peak Sync TIP Power RF IN 60dB 1mV...

Страница 69: ...00 mA dc Connectors Connector Mains Input IEC Inlet RF IN 75 BNC Female IF IN 50 BNC Female IF OUT 50 BNC Female SIF OUT 50 BNC Female RS232 9 Way D Type Female RESET STATUS 9 Way D Type Female AUDIO...

Страница 70: ...pliance FCC Information This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must...

Страница 71: ...Broadcast Ltd 71 Provisional Version 0 3 O Or rd de er ri in ng g i in nf fo or rm ma at ti io on n Showman 1000 Variants Model Description Showman 1000 S A basic multi standard S_Variant Showman 100...

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