LG 3803 8VSB/QAM SIGNAL GENERATOR INSTRUCTION MANUAL LEADER ELECTRONICS CORP.
TABLE OF CONTENTS GENERAL SAFETY SUMMARY ............................................................................................. I 1. 2. INTRODUCTION .............................................................................................................. 1-1 1.1 Scope of Warranty................................................................................................... 1-1 1.2 Operating Precautions......................................................................................
5.4 LEVEL ..................................................................................................................... 5-6 5.5 BER ......................................................................................................................... 5-7 5.5.1 5.6 6. SETUP......................................................................................................... 5-8 UTILITY .......................................................................................................
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.
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. If you touch inside the instrument it could result personal shock or fire hazard.
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. If there is a possibility of moisture condensation allow the instrument to sit for 30 minutes without the power on.
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. ■ Caution when Not to Using Instrument the for a Long Time Make sure to disconnect the power cord from the socket when you do not use the instrument for a long time.
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. 1.
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 CAUTION 1.2.3 Reverse Voltage, Excessive Voltage Do not apply external voltage to the output connectors. If the cable touches such as DC power source, internal attenuator may be burned-out.
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. Operating temperature range: 0 to 40 ˚C 5 to 40 ˚C (When Option 70 is installed.) • High humidity environments Do not place the instrument in the high humidity environment (e.g., bathroom, near a humidor).
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. Providing pseudo random signal (PN) and BER counter can perform BER measurement of receivers and tuners with a signal unit.
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 Resolution Channel Accuracy 50 to 900 MHz 1 kHz, set in frequency USA, KOREA ±0.4 x 10-6 (2) Output Range Resolution Impedance Level Accuracy Output Connector Harmonics Spurious -100 to +13 dBm (into 50 Ω) 0.1 dB 50 Ω ±1 dB (at 0 dBm, C/N off) N type -30 dBc -50 dBc 2.3.
(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 Input Level Input Frequency BNC 50 Ω 0.8 Vp-p 10 MHz (6) FREQ STD Output Output Connector Output Impedance Output Level Output Frequency BNC 50 Ω +4 dBm 10 MHz (7) 4-Wire Serial BER Input Input Connector BNC Input Level LVTTL 3.
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 Function 10BASE-T or 100BASE-TX Setting this instrument, reading status (3) GPIB Specifications Function ANSI/IEEE Std 488.1-1987.
3. PANEL DESCRIPTIONS 3.1 Front Panel 21 ○ 3 ○ 2 ○ 1 ○ 5 ○ 6 ○ 7 ○ Figure 3-1 1 ○ 4 ○ 11 ○ 13 ○ 14 ○ 18 ○ 9 ○ 8 ○ 10 ○ 12 ○ 16 ○ 17 ○ 15 ○ 19 ○ ○ 20 LG 3803 front panel POWER switch Push this switch in to apply power. Release this switch for turning power off. setting conditions immediately before turning power off can be recalled. The 2 ○ LCD panel Indicates the setting conditions in Graphical User Interface (GUI). 3 ○ Function keys (F1 to F5) Set functions.
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. 9 ○ Ten key (0 to 9 . -) Directly enter such numeric data as level, channel (frequency), CN. key to enter data. 10 ○ ENTER key Enters numeric data set.
16 ○ RECALL key Recalls the setting conditions in the specified address. 17 ○ ↑, ↓ key 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. control mode. This key is disabled in local 20 ○ RF OUTPUT connector CAUTION Outputs RF signal. Refer to Section 2.3.2, "RF Signal Generator" for specifications.
3.2 Rear Panel 22 24 ○ ○ 23 ○ 27 ○ 26 ○ 25 ○ 28 ○ 29 ○ 31 ○ 30 ○ Figure 3-2 33 ○ 32 ○ 35 ○ 34 ○ 31 ○ 36 ○ 39 ○ 37 ○ 38 ○ 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. 23 FREQ STD 10 MHz OUTPUT connector ○ Synchronizes other equipment.
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. 32 ○ ETHER connector Control connector for 10BASE-T or 100BASE-TX. 33 ○ USB connector Factory use only. 34 ○ Leave this connector open.
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. The setting conditions immediately before turning power off will be recalled. 4.2 Screen Description The screen display consists of the top screen and various setting screens.
8 BER result display Displays the Bit Error Rate (BER) measurement value and GO/NO-GO results based on the threshold values. 9 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. 11 C/N level Display the C/N level. set off. 12 Key lock Displays the panel key lock status. 13 Alarm display Display alarm status for cooling fan, TS input, reference signal and OOB.
<> • The following alarm message is displayed on the top screen. Message is displayed in red. [FAN] Indicates cooling fan trouble. If this alarm is displayed, turn the instrument power off, then contact your local Leader agent. [TS IN] Monitors each input signal when SPI/ASI is selected as TS input. The SPI input in BER measurement mode is also monitored. The alarm is displayed in the following status: (1) No signal is input.
14 ○ 15 ○ 16 ○ 18 ○ 17 ○ 16 ○ 14 ○ 15 ○ 16 ○ 18 ○ 17 ○ Figure 4-2 14 Screen title, hierarchical layer display 15 Unit information Setting screen example (1) Displays the screen title and hierarchical layer from the top menu. Indicate the setting parameter of this instrument or OOB. 16 Selection status Use the corresponding key when changing the settings. The selected item is displayed in white character on the blue background.
19 ○ 19 ○ 20 ○ 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. The value is only entered when the value is within the acceptable range. 20 Step display The numeric value can be sequentially updated in preset steps displayed in the step size column.
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. Sets the Interleave. Selects the CW on/off. (Refer to Section 5.1.) NOISE Sets the CN level value. Sets the CN addition on/off. (Refer to Section 5.2.
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). • Source (F1) • Modulation (F2) Selects the input source. (Refer to Section 5.1.1.) Selects the broadcasting sy52245927o(dulation mod).
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. • When the external TS (SPI, ASI) is selected, reception capability is disabled if TS INPUT alarm lights on the top screen or TS exceeding allowable rate is input.
(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. Figure 5-3 ROM pattern selection screen • Pattern (F3) Selects the video pattern.
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. • C/N Addition (F5) Sets C/N on/off. The C/N value can be directly entered by using the numeric keypad, or changed by using the↑,↓,Up (F2) and Down (F4) keys.
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. (＊Selectable only when frequency is set.) • Down (F4) Decrements the channel or frequency by preset step size within the acceptable range. • Input Item (F5) Selects setting range and method of the RF frequency.
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. The LEVEL can be directly entered by using the numeric keypad, or changed by using the↑,↓,Up (F2) and Down (F4) keys.
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. • Down (F4) Decrements the C/N or output level value by preset step size within the acceptable range. • Select (F5) Selects the item by pressing the ↑,↓, up (F2) or Down (F4) keys in the DATA ENTRY group.
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. • Value Input Select (F5) Selects the item to be set. Upper Sets the upper threshold value (close to 0) in GO/NO-GO judgement mode. Lower Sets the lower threshold value (close to 1) in GO/NO-GO judgement mode.
5.6 UTILITY Figure 5-9 Software Version TS ROM Version Installed Unit Utility screen Displays the control software version. Provide the serial number indicated on the rear panel and software number when contacting us. Displays the ROM pattern version. Displays the option installed. • Config (F1) Address of TCP/IP and GPIB is displayed. (Refer to Section 5.6.1) • Pre. Group (F2) There are 100 preset conditions (i.e., consisting of 10 groups, 10 conditions per group).
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.
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.
5.6.3 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. Notes on GPIB ADDRESS setting ＊The setting conditions will be recalled when the power is turned on.
5.6.4 PRESET GROUP Figure 5-13 • CF Access (F1) • Group No. Up (F2) PRESET GROUP screen Save the PRESET DATA to the memory card and load it from the memory card. (Refer to Section 5.6.
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. 5.7 Internal Settings 5.7.1 Setting Calendar Change to the super user, then login with telnet. (Lowercase letters can only be used.) data The ID and password are lg3803. Enter month, date, hour, minute, and second as follows.
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 ↑ or ↓ key in the PRESET column, or enter address by using the numeric keypad. (4) When the address is directly set by using the numeric keypad, press the ENTER key. (5) Pressing the STORE key stores data.
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.
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. Therefore, the board mentioned above should be used when controlling this instrument. 8.
8.3 Interface Message Function Table 8-2 Upper 4 bits Lower 4 bits 0 0 1 Interface message and ASCII code 2 3 4 5 6 7 ASC MSG ASC MSG ASC MSG ASC MSG ASC MSG ASC MSG ASC MSG ASC MSG NUL SPC 0 @ P ` p ! 1 A Q a q 2 " 2 B R b r 3 # 3 C S c s $ 4 D T d t 5 % 5 E U e u 6 & 6 F V f v 7 ' 7 G W g w 8 ( 8 H X h x 9 ) 9 I Y i y * : J Z j z B + ; K [ k { C , < L ¥ l | - = M ] m } E .
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. • GPIB buffer and waiting command remain as is. • Remote control conditions remain as is. • Front panel control settings remain as is.
8.7 Multiline Message Command Table 8-3 lists the multiline message command types and a reply to each command.
(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.
Table 8-5 Query code list 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Header SY TS CO CN CL BO BR BJ BU BL BI CH RF DF LM DL CK GR GS 20 CW Data n ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Description Reading modulation mode selected Reading signal selected to TS input 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 Reading s
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 i Integer including decimal point ne 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). • Header is not added for reply; the reply code consists of data only. (1) Selecting modulation mode...................
For Internal (OP70 installed. p 0 1 Reply only; no setting is required.
(3) 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) n 0 1 (4) C/N On/Off Off On Setting and querying C/N value.........."CN" Function Setting and querying C/N value added. Syntax CN_i (Setting, reply) CN_? (Query) i C/N value: 0 to 31.0 (dB) Effective down to one digit after the decimal point (5) Incrementing C/N value......................"CU" Function Incrementing C/N value in current steps.
(9) Reading BER measurement value ....."BR" Function Reading BER measurement value. Syntax ne (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. (10) Reading BER judgement results ........"BJ" Function Reading BER GO/NO-GO judgement results In accordance with measurement value. Syntax ne_n (Reply) BJ_? (Query) BER value n 0 1 ne: Replied in exponential format of 0.
(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. Notes on program code for (8) to (13) When TS input is set other then the PN, both setting and querying operations are disabled. (14) Setting RF channel......
(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) n 0 1 2 3 4 Frequency Steps 0.001 0.01 0.1 1.0 10.0 ＊This program code is ignored when frequency is set in channel. (19) Setting output level............................."LM" Function Setting and querying output level. Syntax LM_i (Setting, reply) LM_? (Query) i Output level: 13.0 to -100.
(23) Selecting reference clock "CK" Function Setting and querying reference clock. Syntax CK_n (Setting, reply) CK_? (Query) n 0 1 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" Function Reading preset values of specified number.
(30) Setting group "GS" Function Setting and querying group. Syntax GS_n, p, q (Setting, reply) GS_n_? (Query) n p q Group number Begin address End address 0 to 9 0 to 98 1 to 99 ＊The address numbers should be: begin address < end address. (31) Setting modulation.............................."CW" Function Setting and querying modulation.
9. ETHERNET 9.1 Connection When constructing the network system via the ETHER connector, use a STP cable conforming to 100BASE-TX standards. Use a straight cable when connecting the network via a hub. Use a cross cable when connecting a personal computer. 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.
10. MAINTENANCE The LG 3803 is designed to operate stably under normal handling. regarding calibration and service, contact your local Leader agent. If you have questions ■ Open Source This instrument partially uses the open source distributed under the terms of the GNU General Public License. (http://www.gnu.org/copyleft/gpl.html) When the source code is required, contact your local Leader agent. [ NOTE ] 1.
