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General Instrument DSR-4800 Series, Руководство пользователя

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General Instrument DSR-4800 Series Скачать руководство пользователя страница 20

IRD User Guide 

17

3.

 

Using the 

Edit

 knob and 

Save

 key, set the “

Signal

” alarm threshold

level to 

“-60dB

”.

Eb/No (Configurable)

•

 

Allows the user to set the alarm threshold level for the Eb/No
signal level.  The alarm threshold can be set from 3.0 to 20dB.

4.

 

Using the 

Edit

 knob and 

Save

 key, set the “Eb/No” alarm threshold

level to “

6dB

”.

10

Delay (Configurable)

•

 

Allows the user to add delay between the time when an alarm
condition is first detected and the time the alarm condition is
reported.  This delay is used so that when changing channels, the
alarms are not set off prematurely.  The setting delays the issuance
of an alarm for all four monitored parameters (i.e. Signal, Eb/No,
Vid, Ext) and can be adjusted from 0.0 to 9.9 seconds.

5.

 

Using the 

Edit

 knob and 

Save

 key, set the “

Delay

” alarm issuance

time to “

7.5s

”.

6.

 

Press the 

Alarms

 key once again.  This display allows the user to

enable or disable each of the four alarm functions.

Signal (Configurable)

•

 

Allows the user to enable or disable the input RF Signal alarm
function.

7.

 

Using the 

Edit

 knob and 

Save

 key, set the “

SIG

” alarm function to

“

On

”.

Eb/No (Configurable)

•

 

Allows the user to enable or disable the Eb/No alarm function.

8.

 

Using the 

Edit

 knob and 

Save

 key, set the “EbNo” alarm function to

“

On

”.

VID (Configurable)

•

 

Allows the user to enable or disable the Video alarm function.

9.

 

Using the 

Edit

 knob and 

Save

 key, set the “

VID

” alarm function to

“

On

”.

                                                          

10

 The measured threshold to crash the MPEG decoder is just below 4dB.  5.2dB is the theoretical Eb/No

threshold according to the manufacturer.  The 6dB setting allows a 2dB threshold from alarm to crash.
The calculated Eb/No over satellite path is expected to be greater than 10dB into a 4.5 meter dish
downlink with a nominal IFL.

Содержание DSR-4800 Series

Страница 1: ... CBS UPNTelevisionNetworks IntegratedReceiver Decoder User sGuide IRDDescription andConfiguration From The CBS Digital Affiliate Rack User s Guide byCBS Engineering Rev 1 4 6 19 2002 ...

Страница 2: ...application by CBS UPN and to configure the unit for use on the CBS and UPN distribution network This guide is not intended as a substitute for the equipment operator guide provided by General Instrument but as a supplement The user should first become familiar with the GI DSR 4810 Operator Guide and then consult this document Please note that for proper operation your receive system must be equip...

Страница 3: ...u 18 Timers Menu 18 Data Menu 18 Config Menu 18 Save Menu 18 LIST OF TABLES TABLE 1 CBS UPN 241 T6 T4 NOMINAL OPERATIONS VIRTUAL CHANNEL TABLE 2 TABLE 2 CBS UPN 242 T5 T4 TELSTAR 6 RECOVERY VIRTUAL CHANNEL TABLE 2 TABLE 3 CBS 243 T6 T5 TELSTAR 4 RECOVERY VIRTUAL CHANNEL TABLE 3 TABLE 4 IRD VIRTUAL CHANNEL INITIALIZATION 5 TABLE 5 IRD RF ASSIGNMENT CONFIGURATION 6 TABLE 6 IRD VIRTUAL CHANNEL NOMINA...

Страница 4: ...al Channel The words Virtual Channel Table VCT and Virtual Channel Map VCM are generally used synonymously The satellite and polarization information actually tell the IRD which of its four RF inputs to use In a separate IRD initialization process the IRD is programmed by the user as to which satellites and polarizations can be found on its four RF inputs Therefore when a VC is selected and the VC...

Страница 5: ...EG 2 T4_19A_EAST 19 12 10 4080 V 3 4 QPSK 29265 7 31 MPEG 2 T4_19B_PAC 19 12 11 4080 V 3 4 QPSK 29265 7 32 MPEG 2 T4_19C 19 12 12 4080 V 3 4 QPSK 29265 7 33 MPEG 2 T4_11A 11 12 12 3920 V 3 4 QPSK 29265 7 34 MPEG 2 T4_11B 11 12 12 3920 V 3 4 QPSK 29265 7 35 MPEG 2 T4_11C 11 12 12 3920 V 3 4 QPSK 29265 7 36 MPEG 2 T4_10A 10 12 12 3900 H 3 4 QPSK 29265 7 37 MPEG 2 T4_10B 10 12 12 3900 H 3 4 QPSK 2926...

Страница 6: ...once to exit the edit mode This will extinguish the word EDIT above the Edit Selector knob 6 The Save key located within the menu key grouping will now be illuminated Transport Displayed Service Carrier FEC Modulation Symbol VCN Type Source Name Transponder Satellite Number Frequency POL Rate Scheme Rate Hz 1 MPEG 2 T6_20A_EAST 20 55 1 4100 H 3 4 QPSK 29265700 2 MPEG 2 T6_20B_PAC 20 55 2 4100 H 3 ...

Страница 7: ...te once a RF lock is accomplished After the Virtual Channel Table is downloaded and the IRD is placed in DCII VCT mode the unit will automatically follow the Virtual Channel for all IRD tuning and decoding settings All defined VCT s are downloaded to the IRD concurrently in the DCII Message Stream Initialization The following IRD initialization procedure details the necessary steps for placing the...

Страница 8: ...T RF FREQ SYM RT FEC 7 Use the Edit knob and Save key to enter the settings for the following ANT 1 parameters 6 SYM RT Symbol Rate 29 266 FEC Forward Error Correction 3 4 8 Press the RF In menu key once again The top line of the display screen should read ANT MODE LNB TONE L O 9 Use the Edit knob and Save key to enter the settings for the following ANT 1 parameters MODE Modulation Mode and Type D...

Страница 9: ...certain unanticipated conditions Once a signal is acquired the IRD will continue to function unless the signal level LED falls below two and or the BER LED level increases above three The AUTHORIZE indicator should be lit 15 After the IRD has locked to a valid DC II signal wait approximately 30 seconds for the CBS UPN Virtual Channel Map to download 7 In the event that Telstar 5 replaces Telstar 6...

Страница 10: ...plished by using the Edit knob Corresponding Service Numbers are automatically updated in the MPEG data field MPEG In DCII VCT Mode this field displays the selected MPEG service number The displayed program numbers are extracted from the MPEG Program Map Table or the DCII defined Service Map Table In DCII VCT Mode Service Numbers are actively related to their Associated Virtual Channels As such th...

Страница 11: ...me as identified by the DCII MSP Satellite Name Table of the current satellite in use Updates automatically while in DC II VCT Mode TRANSNAME A twelve character data field which displays the name as identified by the DCII MSP Transponder Name Table of the current satellite transponder in use Updates automatically while in DC II VCT Mode 2 Press the RF In menu key again ANT Displays the current ant...

Страница 12: ...t LNB Defines the power level sourced by the current antenna input to the LNB on the antenna LOW 14 Volts HIGH 20Volts TONE Displays the current setting of the 22kHz tone generation on the current antenna input L O Displays the current setting of the local oscillator being used on the current antenna input Status Menu Entered by pressing the Status key This menu contains no configurable parameters...

Страница 13: ...d in the data fields are configurable 1 Press the Video key VID Simply indicates that the current menu is the Video menu PDST Configurable A four character data field allowing the control of the pedestal setting Selections are a Off override pedestal off b On override pedestal on c Auto pedestal setting determined by GI MSP messages 2 Using the Edit knob and Save key the PDST data field should be ...

Страница 14: ...ny other than L20F2 may result in disruption of CBS VBI services ODD EVEN Configurable Allows the user to select the video field odd even or both and type of Vertical Interval Test Signal to be inserted on the line of video selected under the VITS parameter above Current test signal selections are 1 NTC 7 Composite 2 NTC 7 Combined 3 FCC Multiburst 5 Using the Edit knob and Save key set the ODD vi...

Страница 15: ...nputs If Pri Sec is displayed under this heading both the primary and secondary reference inputs are receiving a signal If a genlock reference input is not receiving a signal is displayed in the data field position corresponding to the missing input signal Audio Menu Configurable This menu contains some configurable parameters However not all of the parameters presented in the data fields are conf...

Страница 16: ...rogram source is not selected active is displayed in the data field LANG CODE A four character data field displaying the language code according to Table 9 below acmod Audio Coding Mode nfchans Channel Array Ordering 000 1 1 2 CH1 CH2 001 1 0 1 C 010 2 0 2 L R 011 3 0 3 L C R 100 2 1 3 L R S 101 3 1 4 L C R S 110 2 2 4 L R SL SR 111 3 2 5 L C R SL SR Table 8 IRD Audio Coding Mode Language Code Lan...

Страница 17: ...LEV Configurable A three character display which enables the user to adjust the audio output level in increments of full scale Output is referenced to full scale with 0 0dBm 100 18dBm with a 600 ohm load 4 Using the Edit knob and Save key set the audio output level to 115 FORMAT Configurable Allows the user to select between four audio format overrides a DUAL b MONO c STEREO d AC3SUR 5 Using the E...

Страница 18: ... spectrum 9 Using the Edit knob and Save key set the dynamic range compression for the low level audio spectrum to Off EMBED Configurable Allows the user to disable the four channel embedded audio in the SDI digital output 10 Using the Edit knob and Save key set the audio embedder to On 11 Repeat Steps 1 through 9 above for audio channels 3 and 4 with the settings listed in Table 10 below Remote M...

Страница 19: ...atellite downlink carrier level available at a given bit rate and the noise in the signal Think of it as digital signal to noise It has a direct impact on the Bit Error Rate BER presented to the MPEG decoder which in turn impacts the decoder s ability to deliver a desired service To the right of the Eb No signal level is the alarm threshold setting for this signal If at any time the Eb No signal l...

Страница 20: ...y set the Delay alarm issuance time to 7 5s 6 Press the Alarms key once again This display allows the user to enable or disable each of the four alarm functions Signal Configurable Allows the user to enable or disable the input RF Signal alarm function 7 Using the Edit knob and Save key set the SIG alarm function to On Eb No Configurable Allows the user to enable or disable the Eb No alarm functio...

Страница 21: ...Y Data Displays the Asynchronous Data Service information from the selected virtual channel This is an automatic function and if no Async Data Service is available Off 8N1 will be displayed under the RS232 CFG heading and the PID data field will display Upon acquisition of the CBS satellite data service the RS232 CFG data field will indicate 9600 8N1 9600 is indicative of the baud rate of the acti...

Страница 22: ...nd 25 to 60 dBm 25 to 60 dBm 1 dB Output Compression Point 0 dBm Min 0 dBm Min Gain Flatness 0 5 dB over 30 MHz 1 0 dB over 30 MHz Frequency Stability aging and temp 40 C to 60 C 50 kHz Max 3 0 MHz Max Phase Noise Max 60 dBc Hz 100 Hz 70 dBc Hz 1 kHz 85 dBc Hz 10 kHz 100 dBC Hz 100kHz 110 dBC Hz 1 MHz 55 dBc Hz 1 kHz 80 dBc Hz 10 kHz 100 dBC Hz 100 kHz 110 dBC Hz 1 MHz Short Term Frequency Slew Ra...

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