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Broadcast Showman 1000 Handbook

Multi-standard analogue tv demodulator
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Showman 1000
Multi-Standard Analogue TV
Demodulator
Handbook
Provisional Version 0.3

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Summary of Contents for Broadcast Showman 1000

  • Page 1 Showman 1000 Multi-Standard Analogue TV Demodulator Handbook Provisional Version 0.3...
  • Page 2 Multi-Standard Analogue TV Demodulator Showman 1000 dB Broadcast Ltd has made every effort to ensure the accuracy of information contained within this document which is nevertheless supplied for information purposes only and does not constitute any form of warranty or guarantee.
  • Page 3 Multi-Standard Analogue TV Demodulator Showman 1000 Date of first publication May 2008 Current issue and date Provisional Version 0.3 / 6 June 2008 Firmware versions  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 4: Table Of Contents

    DOCUMENT HISTORY INTRODUCTION The Showman 1000 Multi-Standard Analogue TV Demodulator Applications Features GENERAL SAFETY SUMMARY INSTALLATION Electrical Installation Installation within the UK Installation outside the UK Mechanical Installation Rear Panel Connectors RS232 serial control port Reset/Status port Audio outputs – phase connections...
  • Page 5 Multi-Standard Analogue TV Demodulator Showman 1000 F: C PPENDIX HANNEL ABLES SPECIFICATION ORDERING INFORMATION  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 6: Introduction

    Showman 1000 The Showman 1000 Multi-Standard Analogue TV Demodulator The Showman 1000 Off Air Receiver from dB Broadcast is a multistandard (PAL / NTSC / SECAM) analogue TV demodulator for professional broadcast applications and is capable of receiving RF signals from most terrestrial or cable analogue broadcast TV standards.

  • Page 7: Features

     IF Input/Output option  Alarm and logging option  Second Audio Processor option  Real Time Clock option - for time stamping alarm events  Reset/Status Port option- local alarm monitoring and reset input  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 8: General Safety Summary

    On receipt of the product. Verify there is no damage and that all accessories are present. Suspected damage or failure. Do not operate the product. Have it inspected by qualified service personnel or contact dB Broadcast or an authorised distributor. Operating environment. The unit is for indoor use only. See the...
  • Page 9 If you suspect there is damage to this product, have it inspected by qualified service personnel. There are no user serviceable parts Return to dB Broadcast or an authorized distributor for repair/service. Installation On receipt of the unit, open the box and verify that the unit and all accessory items included.

  • Page 10: Installation

    For continued protection against risk of fire, replace only with the same type and rating of fuse. Pour ne pas compromettre la protection contre les risques d’incendie, remplacer par un fusible de même type et de mêmes caractéristiques nominales.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 11: Installation Within The Uk

    483mm (19-inch) rack. Allow at least 100mm clearance at the back of the product for cable connections. Ventilation slots on both sides of the product must be kept clear to allow free airflow.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 12: Rear Panel Connectors

    S1 output level: –9dBm (nominal for RF Input > 66dBμV). RESET/STATUS The optional Reset/Status Port allows the Showman 1000 to be wired to a local (Optional) 9-way D-type monitoring system for status checks and alarms. See below for details.

  • Page 13: Rs232 Serial Control Port

    Receive data (From PC) Ground Shell Chassis ground Reset/Status port The Reset/Status port allows the 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 Signal Comments...
  • Page 14 6. Power supply outside limits Reset To reset the unit, momentarily link pin 5 and pin 9 for >10mS. Note: pin 9 is internally connected to a 470Ω ‘pull-up’ resistor to +5 volts.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 15: Audio Outputs - Phase Connections

    Table 5: PSC Connector Details PART Type Number Comments 3-Way Mini-Combicon MC 1,5/3-ST-3,5 No cable retention possible 3-Way Power-Subcon PSC 1,5/3-F Retention possible with housing. Cable Housing SCT-D-SUB 9-KG Use with 3-Way POWER-SUBCON  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 16: Getting Started

    70Ω 6.35mm (¼”) standard stereo headphone jack socket. In this manual, the cursor key symbols ◄, ►, ▲ or ▼ along with <ENTER> and <ESCAPE>, indicates a single press (unless otherwise indicated) of the corresponding front panel keys.  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 17 Multi-Standard Analogue TV Demodulator Showman 1000 Getting Started To use the Showman 1000 for the first time or check basic operation, proceed as follows: 1. Applying mains power Note: There is no power on/off switch. Connect (100 to 240VAC, 50/60Hz) at the IEC input of the unit. The two-line LCD panel will illuminate and display an RF (IF) LEVEL bar graph (top line) and the currently tuned channel number and/or frequency (bottom line).
  • Page 18  Press <ENTER> to accept or <ESCAPE> to reject the selection  Press <ESCAPE> again to return to DEFAULT When Showman 1000 is correctly tuned, between five and nine segments of the RF LEVEL bar graph should be solid. Using the optional IF Input The IF Input has 50Ω...
  • Page 19 Multi-Standard Analogue TV Demodulator Showman 1000 Getting Started  Audio Detected. This page automatically shows the type of broadcast signal received, i.e. Mono, Dual Language, Stereo or SAP (Second Audio Program – M/N Standard only).  Audio 1 Quasi-Peak Detectors. Twin bar graphs give a visual indication of audio activity on the left (L) and right (R) hand Audio 1 Outputs.
  • Page 20  Press <ENTER> to accept or <ESCAPE> to reject the selection.  Press <ESCAPE> again to return to DEFAULT.  Alternatively access the Headphone Options menu as follows: From DEFAULT: Press <ENTER> ▲ ▲.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 21: Operation

    Multi-Standard Analogue TV Demodulator Showman 1000 Operation This section describes the menu structure of the Showman 1000 Multi-Standard Demodulator and provides operation and configuration information. Refer to the Getting Started Guide for basic operation or to find help with using the unit for the first time.
  • Page 22 = Temperature <+10ºC or >+70ºC = Power supply outside limits Standard. This displays the TV standard to which Showman 1000 is set. If necessary it must be changed manually by selecting a Channel Table suitable for the region of operation (see below).

  • Page 23: Main Menus

    The Main Menu provides access to various 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 Monitoring page Press ▲...

  • Page 24: Receiver Options Menu

     Configure a User Defined Table  Operate Channel Autosearch  Select a Channel Number or Frequency  Use 99-location Program memory (Load, Store or Delete Programs) Figure 5: Receiver Options menu  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 25 Multi-Standard Analogue TV Demodulator Showman 1000 Operation Figure 6: Receiver Options sub-menus These Receiver Option menus follow on from the Set User Table Std menu and the Set Channel Table menu.  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 26 0.25MHz setting increments are possible. Press <ENTER> to store any change. If ENTER is pressed, the display will advance to the next Channel Number where the above process may be repeated.  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 27 Channel Autosearch Channel Auto-Search is a quick way to store the active analogue 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 correct Channel Table has been selected (See above).
  • Page 28 Press <ENTER> <ENTER> ▼ ▼ ▼ ▼ <ENTER>. Press ▲ or ▼ to select the required Program Number for deletion. Press <ENTER> to accept or <ESCAPE> to reject the selection. Press <ESCAPE> <ESCAPE> <ESCAPE> to return to DEFAULT.  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 29 (Ignore any individual program displayed for loading). Press <ESCAPE> <ESCAPE> to return to DEFAULT. The bottom line of the DEFAULT screen should now display a Program and Channel number. To change Program simply press ▲ or ▼.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 30: Audio Options Menu

    Showman 1000 Operation 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, Two-Tone/Zweiton), BTSC and EIA-J. Figure 7: Audio Options menu – Excluding BTSC ...
  • Page 31 Multi-Standard Analogue TV Demodulator Showman 1000 Operation Figure 8: Audio Options menu – BTSC (P-Variant) Figure 9: Audio Options menu – BTSC (S-Variant)  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 32 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.
  • Page 33 Press <ENTER> ▼ <ENTER> ▲ <ENTER> to view the current Audio 2 Volume setting. Press ▲ or ▼ to raise or lower the volume. Press <ENTER> to accept or <ESCAPE> to reject the selection.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 34: Configuration Options Menu

    Multi-Standard Analogue TV Demodulator Showman 1000 Operation Configuration Options Menu This menu is for configuring ancillary functions within Showman 1000. Some options may not be available on certain Showman 1000 variants. Figure 10: Configurations Options menu  2008 dB Broadcast Ltd...

  • Page 35: Input Source

    Press <ESCAPE> <ESCAPE> to return to DEFAULT. Video Mute Set When Video Mute Set is enabled, a check is made for Showman 1000 synchronisation with the incoming RF signal. Where none is detected, then the video output is muted. The Video Mute Set factory default is Mute Disabled.
  • Page 36 Press <ESCAPE> <ESCAPE> to return to DEFAULT. Group Delay Set The group delay characteristic of the Showman 1000 Demodulator is pre-determined, according to the selected TV standard. However it is possible to set the group delay response to nominally flat, if required, for example when measuring transmitter performance.
  • Page 37 Operation AFC Control Showman 1000 frequency tuning is in accurate 0.25MHz increments. This is normally sufficient for tuning into terrestrial or cable broadcast TV transmissions. Automatic Frequency Control (AFC) is a means for automatically tuning into “off standard” frequencies to within a resolution of ±50kHz.

  • Page 38: Headphones Options Menu

    A standard 6.35mm (¼”) stereo headphone jack-socket is provided on the front panel of Showman 1000. If a pair of stereo headphones, with a standard jack-plug is inserted into the jack-socket (when the unit is powered and at DEFAULT) the LCD will automatically change to show Headphone Volume, which may be adjusted by pressing ▲...

  • Page 39: System Options Menu

    The System Options menu deals with communication set-ups, LCD contrast adjustment, Real-Time Clock set-ups and the setting of Factory 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>...
  • Page 40 From System Options – Date Format: Press <ENTER> Press ▲ or ▼ to select DD/MM/YY or MM/DD/YY format Press <ENTER> to accept or <ESCAPE> to reject the selection. Press <ESCAPE> <ESCAPE> to return to DEFAULT.  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 41 Press <ENTER> to display: Set Factory Defaults – Press ENTER to Set. IF YOU ARE SURE THAT YOU WISH TO SET FACTORY DEFAULT: Press <ENTER>, otherwise press <ESCAPE> to abort. Press <ESCAPE> <ESCAPE> to return to DEFAULT.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 42: Status Options Menu

    Operation Status Options Menu This option is not available on certain Showman 1000 variants. The main Status Options menu item is View Status Log. This provides a time-stamped history of events that have occurred within the unit. A Clear Status Log menu item is also provided.

  • Page 43: Power Supply

    The LCD will display the internal temperature of the unit. Note: If the temperature is outside the limits +10ºC to +70ºC, the front panel ALARM LED will be lit. Press <ESCAPE> <ESCAPE> to return to DEFAULT.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 44: Remote Operation

    Multi-Standard Analogue TV Demodulator Showman 1000 Remote Operation This section describes how to remotely control the Showman 1000 over an RS232 connection using the Command-Line Interface (CLI). The CLI may be used for configuration, monitoring and control. It also facilitates scripting as an entry point for integration into existing software systems.

  • Page 45: Command Syntax

    The remote control commands use the standard ASCII character set and are split into two types: Set and Get. Set - send from PC Set commands are used to modify the Showman 1000 Receiver settings. The Set command format is as follows: Set command format: Set Command: <Command>...

  • Page 46: Remote Command Descriptions

    Table 7: Audio Preference Settings (BTSC for S-Variant). The length of the request reply string is always the same and the relative positions of the 3 components in the reply do not vary.  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 47 Mono Mono Stereo Stereo Mono Table 8: Audio Preference Settings (BTSC for P-Variant) Audio 1 Audio 2 Parameter Stereo Stereo Stereo Stereo Mono Mono Mono Mono Mono Mono Mono Mono Mono Mono  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 48 XX = 01 to 99 CLRPROG= Parameter: None Returns: OK if command valid, COMMAND ERROR if command invalid Examples Command: CLRPROG 10= Result: Program 10 has been deleted Command: CLRPROG= Result: All Programs have been deleted  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 49 OK if command valid, COMMAND ERROR if command invalid Example Command: DEF= Result: Unit set to factory defaults DMOD Sets or requests the unit date display mode (Showman 1000 P-Variant only). Request Command: DMOD? Returns: US or UK Command: DMOD=...
  • Page 50 OK if command valid, COMMAND ERROR if command invalid Examples Command: GROUP? Returns: GROUP: ON Command: GROUP=FLAT Result: Group Delay set to flat INPUT Sets or requests the Input Signal source (Showman 1000 P-Variant only). Request Command: INPUT? Returns: INPUT=IF INPUT=RF Command: INPUT = Parameter: IF or RF...
  • Page 51 LCD: 20 Command: LCD=15 Result: LCD contrast set to 15 Requests a single status log entry or clears status log (Showman 1000 P-Variant only). Request Command: LOG X? where X is 0 to 5 0 – Returns log entry 0 (latest) 5 –...
  • Page 52 00 to 13 (See Table 10) Returns: OK if command valid, COMMAND ERROR if command invalid Examples Command: NICALM? Returns: NICALM: 2.50e-04 Command: NICALM=03 Result: Nicam BER alarm level set to 7.50e-05  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 53 Command: PHONESRC= Parameter: 1 or 2 Returns: OK if command valid, COMMAND ERROR if command invalid Examples Command: PHONESRC? Returns: PHONESRC: 2 Command: PHONESRC=1 Result: Headphone output set to Audio 1 source  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 54 OK if command valid, COMMAND ERROR if command invalid Examples Command: RFALM= Result: RF alarm level is set to the current signal level SERIAL Requests the unit serial number. Request Command: SERIAL? Returns: SERIAL: <Serial Number>  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 55 L Nicam M Korea D/K Nicam L’ M BTSC L AM SYNC Requests the unit sync lock status. Request Command: SYNC? Returns: SYNC: NOT LOCKED SYNC: LOCKED Example Command: SYNC? Returns: SYNC: LOCKED  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 56 Europe (Air) (Std K) Europe (Air) (Std L) Ireland (Air) France (Air) (Std L’) France (Air) (Std L) Japan (Air) USA (Air) USA (STDCATV) USA (HRCCATV) USA (IRCCATV) Korea (Air) User Defined Table  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 57 Sets or requests the video level. Request Command: VIDLEV? Returns:00 (minimum level) – 31 (maximum level) Command: VIDLEV = Parameter: 00 - 31 Returns: OK if command valid, COMMAND ERROR if command invalid Examples Command: VIDLEV?  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 58 OK if command valid, COMMAND ERROR if command invalid Examples Command: USERSTD? Returns: USERSTD: D/K Command: USERSTD=4 Result: User defined channel table standard set to L Table 13: USERSTD, Table Video standards Parameter Video Standard L’  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 59: System Defaults

    Disabled Serial Baud Rate* 19200 Serial Flow Control* None LCD Contrast 13 (Range 0 to 31) Time and Date* Factory Set Status Log* Clear Note: Current settings are restored after power off.  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 60: Channel Tables

    Table 17: France (Air) VHF Standard L’ Chan. (MHz) Chan. (MHz) Chan. (MHz) Chan. (MHz) 47.75 55.75 60.5 63.75 Table 18: France (Air) VHF Standard L Chan. (MHz) Chan. (MHz) Chan. (MHz) Chan. (MHz)  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 61 753.25 199.25 555.25 657.25 759.25 205.25 561.25 663.25 765.25 211.25 567.25 669.25 771.25 471.25 573.25 675.25 777.25 477.25 579.25 681.25 783.25 483.25 585.25 687.25 789.25 489.25 591.25 693.25 795.25 495.25 597.25 699.25  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 62 619.25 823.25 217.25 421.25 625.25 829.25 223.25 427.25 631.25 835.25 229.25 433.25 637.25 841.25 235.25 439.25 643.25 847.25 241.25 445.25 649.25 853.25 247.25 451.25 655.25 859.25 253.25 457.25 661.25 259.25 463.25 667.25  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 63 Multi-Standard Analogue TV Demodulator Showman 1000 Channel Tables Table 22: USA (HRC CATV) VHF/UHF Standards M/N Chan. (MHz) Chan. (MHz) Chan. (MHz) Chan. (MHz)  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 64 817.25 211.25 415.25 619.25 823.25 217.25 421.25 625.25 829.25 223.25 427.25 631.25 835.25 229.25 433.25 637.25 841.25 235.25 439.25 643.25 847.25 241.25 445.25 649.25 853.25 247.25 451.25 655.25 859.25 253.25 457.25 661.25  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 65 569.25 674.25 779.25 175.25 576.25 681.25 786.25 182.25 583.25 688.25 793.25 189.25 590.25 695.25 800.25 196.25 597.25 702.25 807.25 203.25 604.25 709.25 814.25 210.25 611.25 716.25 217.25 618.25 723.25 224.25 625.25 730.25  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 66 55.25 182.25 203.25 224.25 62.25 189.25 210.25 Table 27: Italy (Air) VHF Standard B Chan. (MHz) Chan. (MHz) Chan. (MHz) Chan. (MHz) 53.75 175.25 201.25 224.25 62.25 183.75 210.25 82.25 192.25 217.25  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 67 239.25 175.25 199.25 223.25 247.13 Table 32: O.I.R.T. (Air) VHF Standard D Chan. (MHz) Chan. (MHz) Chan. (MHz) Chan. (MHz) 49.75 85.25 183.25 207.25 59.25 93.25 191.25 215.25 77.25 175.25 199.25 223.25  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 68 Video Level (Adjustable) Impedance Ω Differential Phase º Differential Gain Chroma Level (Adjustable) K-2T K-PB Chrominance-Luminance Delay Bar Line Time Distortion Bar Line Time Tilt Noise (Unified Weighting, Black & Burst Video)  2008 dB Broadcast Ltd Provisional Version 0.3...

  • Page 69: Audio Output

    -20 °C to 70 °C Operating Altitude 2000 meters maximum (6500 feet) Physical Description Height 44 mm (1.75 inches) Width 483 mm (19.0 inches) Depth 345 mm (13.4 inches) Weight Net Weight: 3kg (6.5 pounds)  2008 dB Broadcast Ltd Provisional Version 0.3...
  • Page 70 Official Journal of the European Communities: EN50081-1 Emissions: BS EN55022: Class B radiated and conducted emissions BS EN55013: Emissions standard for Broadcast Equipment EN50082-1 Immunity: BS EN61000-4-2 ESD Requirements BS EN61000-4-3 Radiated susceptibility BS EN61000-4-4 Electrical Fast Transient Burst requirement...
  • Page 71 Multi-Standard Analogue TV Demodulator Showman 1000 Showman 1000 Variants Model Description Showman 1000-S A basic multi-standard S_Variant Showman 1000-P An enhanced P-Variant with alarm/monitoring and IF I/O  2008 dB Broadcast Ltd Provisional Version 0.3...

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