Leader Electronics Corp. LG 3803 Instruction Manual
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Leader Electronics Corp. LG 3803 Instruction Manual

8vsb/qam signal generator
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LG 3803
8VSB/QAM SIGNAL GENERATOR
INSTRUCTION MANUAL
LEADER ELECTRONICS CORP.
Get user manuals:
See SafeManuals.com

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  • Page 1 LG 3803 8VSB/QAM SIGNAL GENERATOR INSTRUCTION MANUAL LEADER ELECTRONICS CORP. Get user manuals: See SafeManuals.com...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS GENERAL SAFETY SUMMARY ..................... I INTRODUCTION ......................1-1 Scope of Warranty....................1-1 Operating Precautions..................... 1-1 1.2.1 Line Voltage and Fuse ................. 1-1 1.2.2 Maximum Input Voltage ................1-2 1.2.3 Reverse Voltage, Excessive Voltage ............1-2 1.2.4 Backup of Control Settings ................1-2 1.2.5 Installation....................
  • Page 3 LEVEL ........................5-6 BER ......................... 5-7 5.5.1 SETUP......................5-8 UTILITY ........................5-9 5.6.1 CONFIG....................... 5-10 5.6.2 TCP/IP ......................5-11 5.6.3 GPIB ADDRESS ..................5-12 5.6.4 PRESET GROUP ..................5-13 5.6.5 CF ACCESS ....................5-14 PRESET, GROUP ......................6-1 Preset ........................6-1 GROUP ........................

  • Page 4: General Safety Summary

    GENERAL SAFETY SUMMARY ■ To Avoid Personal Injury It is recommended that only qualified personnel with technical knowledge use this instrument only after reading and fully understanding all functions of the instrument described this instruction manual. This instrument is not designed and manufactured for consumers. If you do not have enough knowledge on electricity, to avoid personal injury and prevent damage to this product, please be sure to use this product only under the su-pervision of an engineer who has sufficient knowledge about electronics.
  • Page 5 GENERAL SAFETY SUMMARY Review the following safety precautions to avoid operator's injury and loss of life and prevent damage and deterioration to this instrument. To avoid potential hazards, use this product as specified. WARNING ■ Warnings on the Cases and Panels of the Instrument Operator should not remove any cases or panel for any reasons.
  • Page 6 GENERAL SAFETY SUMMARY WARNING ■ Warning on Installation Environments ● About the Guaranteed Operating Temperature Range Operate the instrument between the temperature range of 0 to 40 °C. Operating the instrument at higher temperatures could cause a fire hazard. Rapid changes of temperatures from cold to warm can create internal moisture or condensation and could damage the instrument.
  • Page 7 GENERAL SAFETY SUMMARY CAUTION ■ Caution on Input/Output Terminals Input Terminals are rated with a maximum input. Do not supply an input over the specified rating in the standard section of the instruction manual. Also, do not supply external power to Output terminal, this could cause the instrument to malfunction. ■...

  • Page 8: Introduction

    1. INTRODUCTION Thank you for purchasing Leader’s measuring instruments. Please read this instruction manual carefully to ensure correct and safe operation. If you have any difficulties or questions on how to use the instrument after you have read this manual, please feel free to contact your local Leader agent. After you have read the manual, keep the manual in a safe place for quick reference.

  • Page 9: Maximum Input Voltage

    CAUTION 1.2.2 Maximum Input Voltage There is restriction when applying input signals. Applying excessive voltage to the connector may result instrument damage. Connector Allowable Input Voltage REMOTE CONTROL INC, DEC, RESET Pins -0.5 V/+5.5 V FREQ STD 10 MHz INPUT 2.5 Vp-p SYNC, VALID, CLOCK, DATA -0.5 V/+5.5 V...

  • Page 10: Installation

    1.2.5 Installation Do not use the instrument in the following environments. • High temperature environments Do not place the instrument under direct sunlight or near a heater (e.g., stove). Do not move the instrument from cold to warm environment abruptly, it may cause condensation.

  • Page 11: Specifications

    2. SPECIFICATIONS 2.1 Description The LG 3803 8VSB/QAM Signal Generator, conforms to 8VSB (digital terrestrial TV in USA System) and 64QAM/256QAM (CATV) standards, features a channel coding, modulation, C/N generator, and up converter in a single package. Consequently, the modulated signal covering VHF and UHF channels can be output.

  • Page 12: Specifications

    2.3 Specifications 2.3.1 Channel Coding Section (1) Broadcasting system Digital Terrestrial (ATSC A/53B) CATV (ITU-T J.83 annex B) (2) Modulation system 8VSB/64QAM/256 QAM 2.3.2 RF Signal Generator (1) Frequency Range 50 to 900 MHz Resolution 1 kHz, set in frequency Channel USA, KOREA Accuracy...

  • Page 13: C/N Generator Section

    (4) ASI, SPI Input Specifications Input Packet Format 188 bytes Applicable Stream MPEG-2 TS (ISO/IEC 13818-1) Input Data Rate 25 Mbps max. (5) FREQ STD Input Input Connector Input Impedance 50 Ω Input Level 0.8 Vp-p Input Frequency 10 MHz (6) FREQ STD Output Output Connector Output Impedance...

  • Page 14: External Interface

    2.3.6 External Interface (1) Memory Card Interface Memory Card Compact flash card (CFA TYPE-I) Function Updating firmware, changing internal TS-ROM (2) ETHER Interface Specifications 10BASE-T or 100BASE-TX Function Setting this instrument, reading status (3) GPIB Specifications ANSI/IEEE Std 488.1-1987. Function SH1, AH1, T8, L4, SR0, RL2, PP0, DC1, DT0, C0, E1 (4) USB Interface Specifications...

  • Page 15: Panel Descriptions

    ○ ○ ○ ○ ○ Figure 3-1 LG 3803 front panel ○ 1 POWER switch Push this switch in to apply power. Release this switch for turning power off. The setting conditions immediately before turning power off can be recalled.
  • Page 16 ○ 7 MEMORY CARD slot Only used when the memory card contents are upgraded or updated. ○ 8 UP MENU key While displaying the setting screen, pressing this key enters the current data, then returns to the upper level by one. Holding down this key for at least one second enters the current setting, then returns to the top screen.
  • Page 17 Increments and decrements the specified address. ○ 18 UNIT key (UNIT) Selects either this instrument or OOB when the LG 3803-01 unit is connected. ○ 19 REMOTE key (REMOTE) Switches the remote control mode to local control mode. This key is disabled in local control mode.

  • Page 18: Rear Panel

    ○ ○ ○ ○ ○ Figure 3-2 LG 3803 rear panel ○ 22 FREQ STD 10 MHz INPUT connector Accepts the external reference signal. Apply 10 MHz reference signal when operating this instrument in synchronized with the equipment connected. ○...
  • Page 19 ○ 31 Cooling fans (Two places) To prevent instrument damage due to overheating, do not block airflow through the ventilation holes. If the fan stops, the LCD panel displays alarm message. Turn the instrument power off immediately, then contact your local Leader agent in this case.

  • Page 20: Lcd Panel Description

    4. LCD PANEL DESCRIPTION 4.1 Turning Power On and Starting Instrument Connect the accessory power cord between the AC inlet on the rear panel and the mains. Press the POWER switch to turn power on for starting the system. Whit for about 45 seconds until the top screen (Status screen) is displayed.
  • Page 21 BER result display Displays the Bit Error Rate (BER) measurement value and GO/NO-GO results based on the threshold values. Interleave Displays "- - -" when the carrier modulation is 8VSB. Displays the interleave length when the 64QAM or 256QAM is selected. 10 Country Displays the channel table: USA or KOREA.
  • Page 22 (1) No signal is applied. (2) Input signal frequency exceeds the PLL lock range. (3) Input signal level is lower than the acceptable level range. [OOB] In case of the LG 3803-01 is incorrectly connected. Get user manuals: See SafeManuals.com...
  • Page 23 <Setting screen example "CODING"> ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Figure 4-2 Setting screen example (1) 14 Screen title, hierarchical layer display Displays the screen title and hierarchical layer from the top menu. 15 Unit information Indicate the setting parameter of this instrument or OOB.
  • Page 24 <Setting screen example "LEVEL"> ○ ○ ○ Figure 4-3 Setting screen example (2) 19 Numeric value display column Displays the current setting value. When data is set by using the numeric keypad, the value is displayed in white on the black background. Press the ENTER key to enter data.

  • Page 25: Menu

    4.3 Menu The top screen only displays the current setting status; there is no setting items. When changing the setting status, press the MENU key to display the setting screen. The MENU key function is listed below: CODING Selects the broadcasting system and modulation mode. Selects the TS input source.

  • Page 26: Using Menu

    5. USING MENU 5.1 CODING Pressing the CODING key in the MENU group enters setting screen. Figure 5-1 Coding screen This screen is used to select the modulation mode and TS signal, and to set items related to channel coding. To exit settings, press other key in the MENU, or hold down the UP MENU key to return to the top screen (status display).

  • Page 27: Source

    5.1.1 Source The TS source can be selected by pressing the Source (F1) key on the Coding (L-1) screen. Notes on selecting TS_source • The receiver is temporary unlocked when TS source (each pattern stored in the ROM, PN, SPI, ASI) is switched since the coding circuit is reset. •...
  • Page 28 (1) Selecting PN The random signal (PN23) can be output by setting the Source to PN on the TS Source (L-2) screen. (2) Selecting ROM Pattern The pattern stored in the ROM (called ROM pattern) can be selected by setting the Source to ROM on the TS Source (L-2) screen, then press the Pattern (F1) key.

  • Page 29: Noise

    5.2 NOISE Figure 5-4 C/N setting screen • Up (F2) Increments the C/N value by preset step size within the acceptable range. • Step Size (F3) Sets the step size for Up and Down operations. • Down (F4) Decrements the C/N value by preset step size within the acceptable range.

  • Page 30: Channel

    5.3 CHANNEL Figure 5-5 Channel or Frequency setting screen • Country (F1) Selects the channel tables of USA or KOREA. • Up (F2) Increments the channel or frequency by preset step size within the acceptable range. • Step Size (F3) Sets the steps for Up and Down operations.

  • Page 31: Level

    5.4 LEVEL Figure 5-6 Level setting • Up (F2) Increments the level value by preset step size within the acceptable range. • Step Size (F3) Sets the steps for Up and Down operations. • Down (F4) Decrements the level value by preset step size within the acceptable range.

  • Page 32: Ber

    5.5 BER Figure 5-7 BER setting and measurement • BER Setup (F1) Sets the BER measurement conditions. Refer to Section 5.5.1. • Up (F2) Increments the C/N or output level value by preset step size within the acceptable range. • Step Size (F3) Selects the steps for C/N or output level.

  • Page 33: Setup

    5.5.1 BER SETUP Figure 5-8 BER SETUP screen • Interface (F2) Selects the TS input for BER measurement. Parallel Use the SPI connector. Serial (2 Wire) Use both [CLOCK] and [DATA] connectors in the SERIAL INPUT group. Serial (4 Wire) Use all of four connectors in the SERIAL INPUT group.

  • Page 34: Utility

    The range can independently be incremented and decremented for each group. (Refer to Section 5.6.4) • OOB Unit (F4) Sets the LG 3803-01 unit (OOB) to enable or disable. • Freq. STD (F5) Selects the reference signal. Get user manuals:...

  • Page 35: Tcp/Ip

    5.6.1 CONFIG Figure 5-10 CONFIG screen • TCP/IP (F1) Sets the IP-Address, Subnet Mask and Default Gateway. (Refer to Section 6.5.2) • GPIB Adr. (F2) Sets the GPIB Address. (Refer to Section 6.5.3) 5-10 Get user manuals: See SafeManuals.com...
  • Page 36 5.6.2 TCP/IP Figure 5-11 TCP/IP screen • Item Select (F5) Selects the item that inputs the numeric value. The values can be directly entered by using the numeric keypad. Notes on TCP/IP setting ＊The setting conditions will be recalled when the power is turned on. 5-11 Get user manuals: See SafeManuals.com...

  • Page 37: Gpib Address

    5.6.3 GPIB ADDRESS Figure 5-12 GPIB ADDRESS screen • GPIB Adr. Up (F2) Increments the GPIB ADDRESS within the acceptable range. • GPIB Adr. Down (F4) Decrements the GPIB ADDRESS within the acceptable range. The setting value can be directly entered by using the numeric keypad, or changed by using the↑,↓,Up (F2) and Down (F4) keys.

  • Page 38: Preset Group

    5.6.4 PRESET GROUP Figure 5-13 PRESET GROUP screen • CF Access (F1) Save the PRESET DATA to the memory card and load it from the memory card. (Refer to Section 5.6.5) • Group No. Up (F2) Increments the Group No. within the acceptable range. •...

  • Page 39: Cf Access

    5.6.5 CF ACCESS Figure 5-14 CF ACCESS screen Status The operation status of SAVE/LOAD to the memory card is displayed. • Preset to CF (F1) Save the PRESET DATA to the memory card. • CF to Preset (F2) Load the PRESET DATA from the memory card to internal memory.

  • Page 40: Preset, Group

    6. PRESET, GROUP 6.1 Preset Up to 100 setting conditions can be stored and recalled by using the front panel key. • Storing Data (1) Set the CODING, CHANNEL, LEVEL, etc. (2) Press the ADDRESS key. The PRESET number LED brinks. (3) Specify the address to store data by pressing the ↑...

  • Page 41: Remote Control

    7. REMOTE CONTROL This instrument can be remotely controlled (e.g., increments or decrements preset data) via the REMOTE CONTROL connector. (1) Major Function Increment, decrement, returning group top (2) Connector 57LE-40240-7700 (DDK Ltd.) or equivalent (3) Input Level TTL (Pull up to +3.3 V) (4) Input Logic Negative logic (5) Output Level...

  • Page 42: Gpib

    8. GPIB Since this instrument provides the GPIB (IEEE 488) connector as standard, major functions can be remotely controlled via the GPIB interface. Note The GPIB capability of this instrument is confirmed by using the GPIB board (PCI-GPIB, PCMCIA-GPIB) manufactured by National Instruments Corporation (NI). If other than the board mentioned above is used, operation may differ from the instructions in this manual.

  • Page 43: Interface Message Function

    8.3 Interface Message Function Table 8-2 Interface message and ASCII code Upper 4 bits Lower ASC MSG ASC MSG ASC MSG ASC MSG ASC MSG ASC MSG ASC MSG ASC MSG 4 bits " & < ¥ > Talk address Listen address Universal command group Address command group...

  • Page 44: Clear, Reset

    8.5 Clear, Reset The Clear and Reset modes can be controlled by using the commands. The followings describe the reply for the clear and reset operations. (1) IFC (Interface clear) Reply of the universal command (IFC) is listed below. • Cancels specified talker and listener. •...

  • Page 45: Multiline Message Command

    8.7 Multiline Message Command Table 8-3 lists the multiline message command types and a reply to each command. Table 8-3 Reply of multiline message command Type Name Description Reply Clearing GPIB buffer Setting serial polling to State Universal Clearing serial polling Command Clearing parallel polling Setting all devices to local lockout status to inhibit...

  • Page 46: Program Code List

    (3) Program message unit separator Use a semicolon ";" (3Bh in ASCII code) when transfers multiple messages simultaneously. (4) Program data separator Use a comma "," (2Ch in ASCII code) to delimit multiple parameters. 8.11 Program Code List Table 8-4 Setting code list Header Data Description...
  • Page 47 Table 8-5 Query code list Header Data Description Reply Reading modulation mode selected Reading signal selected to TS input n, p, q, r Reading setting status of CN on (1), off (0) Reading setting status of C/N value Reading setting status of step to be set Reading setting status of BER measurement on (1), off (0) Reading BER value Reading judgement results...

  • Page 48: Detail Program Code

    8.12 Detail Program Code This section describes the detail program codes listed in Section 8.11. Definition: n, p, q, r, s 0 and natural number Integer including decimal point Real number including exponential number Space (20h in ASCII code) • Terminator is omitted for a syntax. Add the terminator at the end of the code (refer to Section 8.9).
  • Page 49 For Internal (OP70 installed. Reply only; no setting is required.) Drive Used For ROM Pattern Selection Color Bar Ramp Monoscope Screen Size Selection 1920 x 1080i (16:9) 1280 x 720p (16:9) 704 x 480i (16:9) 704 x 480i (4:3) Sound Pattern L: 1 kHz, R: 400 Hz L, R: 1 kHz L, R: 400 Hz...
  • Page 50 Setting C/N on/off ......."CO" Function Setting and querying C/N set in Step (4) on/off. Syntax CO_n (Setting, reply) CO_? (Query) C/N On/Off Setting and querying C/N value.."CN" Function Setting and querying C/N value added. Syntax CN_i (Setting, reply) CN_? (Query) C/N value: 0 to 31.0 (dB) Effective down to one digit after the decimal point Incrementing C/N value......"CU"...
  • Page 51 Reading BER measurement value .."BR" Function Reading BER measurement value. Syntax (Reply) BR_? (Query) BER value ne: Replied in exponential format of 0.00E-0 ＊This program code can only be used when the Source on the TS Source screen is set to PN.
  • Page 52 (13) Setting BER measurement interval .."BI" Function Setting and querying BER measurement interval. Syntax BI_p (Setting, reply) BI_? (Query) BER measurement interval p: 0.1 to 3600.0 sec. Effective down to one digit after the decimal point. ＊The value set in second is converted into the number of packets ; it cannot be set in number of packets.
  • Page 53 (18) Setting frequency in current steps "DF" Function Setting and querying increment/decrement of frequency in current steps. Syntax DF_n (Setting, reply) DF_? (Query) Frequency Steps 0.001 0.01 10.0 ＊This program code is ignored when frequency is set in channel. (19) Setting output level......"LM" Function Setting and querying output level.
  • Page 54 (23) Selecting reference clock "CK" Function Setting and querying reference clock. Syntax CK_n (Setting, reply) CK_? (Query) Reference Clock Internal External input (24) Writing preset memory ......."ST" Function Storing current setting conditions to specified number. Syntax ST_n (Setting) n Preset number 0 to 99 (25) Reading preset memory ....."RC"...
  • Page 55 (30) Setting group "GS" Function Setting and querying group. Syntax GS_n, p, q (Setting, reply) GS_n_? (Query) Group number 0 to 9 Begin address 0 to 98 End address 1 to 99 ＊The address numbers should be: begin address < end address. (31) Setting modulation......"CW"...

  • Page 56: Ethernet

    Network manager should set the TCP/IP of this instrument according to your local network environments. 9.2 Operating with Personal Computer Use the TELNET when remotely controlling the LG 3803 by using a commuter. To startup the TELNET, refer to the personal computer instruction manual. ＊Starting TELNET with the Windows 2000 ①...

  • Page 57: Maintenance

    10. MAINTENANCE The LG 3803 is designed to operate stably under normal handling. If you have questions regarding calibration and service, contact your local Leader agent. ■ Open Source This instrument partially uses the open source distributed under the terms of the GNU General Public License.

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