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PowerTalk™ Manual

2

SGC Inc. SGC Building, 13737 S.E. 26th St. P.O.Box 3526, Bellevue, WA. 98009 USA

Fax: 206-746-6384 • Tel: 206- 746-6310 • 1-800-259-7331

© 1994 SGC, Inc.

June 28, 2004; 15:46

2.0 Noise Reduction

The PowerTalk™ head incorporates several technologically advanced processes to
filter out unwanted received noise, resulting in dramatically enhanced signal clarity.
Adaptive Digital Signal Processing (ADSP™), Spectral Noise Subtraction (SNS™) and
the Notch filter (tone suppressor) are three methods used by the PowerTalk™ head to
filter out signal noise. In addition, the user can adjust the quality of the audio signal by
setting the Low, High and Center frequency. These processes can be used separately or
in combination by the user to configure the audio to get the best possible reception.

2.1 Adaptive Digital Signal Processing (ADSP™)

The benefit of ADSP

TM

is illustrated in the following graph:

2.2 Spectral Noise Subtraction (SNS™)

The benefit of SNS™ is illustrated by the following graph:

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Содержание PowerTalk Head w/ADSP & SNS 04-22

Страница 1: ...P O Box 3526 Bellevue WA 98009 USA Fax 206 746 6384 Tel 206 746 6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 SG 2000 PowerTalk TM Head w ADSP TM SNS TM Catalog Number 04 22 For the SG 2000 HF SSB Installation and Operations Manual Revised Sept 6 1995 ...

Страница 2: ...Frequency Corner 7 4 2 2 High Frequency Corner 8 4 2 3 Center Frequency 9 4 3 Noise Reduction NOISE 10 4 4 Spectral Noise Subtraction SNS 11 4 5 Preset Memory PRESET 12 4 6 User Memory 13 4 7 Bypass BYPASS 14 4 8 Digital Rotary Control ADJ 15 4 9 LED Display 15 4 9 1 Off Condition 15 4 9 2 On Condition 15 4 10 Mnemonics 16 4 10 1 Memory Selection 16 4 10 2 Preset Memory Function 17 4 10 3 Operatin...

Страница 3: ... Tel 206 746 6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 8 0 Front Panel Controls 33 8 1 Primary Keyboard Functions 33 8 2 SHIFT Functions 40 8 3 Program Functions 41 8 4 Operating Session 42 8 6 Scanning Functions 48 8 7 Changing Frequency 52 8 8 Additional Functions 54 9 0 Schematics 60 10 0 Index 66 ...

Страница 4: ...10 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 Disclaimer The ADJ knob has a mechanical detent You can feel the detents when the ADJ knob is rotated The ADSP portion of the PowerTalk head can hang up if the ADJ knob stops between detents Rotating the ADJ knob and stopping on the detent will allow the head to adjust properly ...

Страница 5: ...are accessories and troubleshooting in the SG 2000 manual that is beyond the scope of this manual This manual will tell you how to operate the PowerTalk Head If you have just bought the SG 2000 radio with the PowerTalk head please read the SG 2000 manual to make sure you have properly set up the radio before you start reading this manual If you have bought this head separately to install on an exi...

Страница 6: ...cessing ADSP Spectral Noise Subtraction SNS and the Notch filter tone suppressor are three methods used by the PowerTalk head to filter out signal noise In addition the user can adjust the quality of the audio signal by setting the Low High and Center frequency These processes can be used separately or in combination by the user to configure the audio to get the best possible reception 2 1 Adaptiv...

Страница 7: ...Inc June 28 2004 15 46 2 3 ADSP and SNS The benefit of ADSP and SNS working in tandem is even more dramatic as illustrated in the following graph 2 4 Notch Filter If the PowerTalk head detects the presence of any constant tones enabling the Notch filter will suppress this tone by 40 dB The Notch filter will automatically suppress up to 5 tones at once ...

Страница 8: ...6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 2 5 High Low and Center Frequency Filters In addition to the above noise reduction features which are mainly on or off the PowerTalk head lets the user adjust the audio quality to their own liking by means of the High Low and Center Frequency filters as illustrated below ...

Страница 9: ...utton functions are similar to the Standard SG 2000 head there are enough differences and new capabilities to warrant giving the PowerTalk its own manual Figure 1 The main visible differences in the new PowerTalk head are the ADSP control section in the upper left corner the tuning knob in the lower left corner that replace the up and down arrows of the standard head and associated buttons The fol...

Страница 10: ...o Figure Two Disclaimer The ADJ knob has a mechanical detent You can feel the detents when the ADJ knob is rotated The ADSP portion of the PowerTalk head can hang up if the ADJ knob stops between detents Rotating the ADJ knob and stopping on the detent will allow the head to adjust properly Now lets go over the operation and control of the ADSP control panel step by step 4 1 Notch Filter NOTCH The...

Страница 11: ...er bandpass corner frequencies in 100 Hz increments and moving the filter s center frequency across the available bandwidth Displayed frequencies are between 200 and 3100 Hz The lower frequency limit however can be as small as 100 Hz Adjustments are made through the digital rotary control labeled ADJ on the ADSP TM panel 4 2 1 Low Frequency Corner LF The low corner frequency is selected by the LF ...

Страница 12: ...aphic representation of setting the Low Corner Frequency is shown below reproduced from Section 2 5 4 2 2 High Frequency Corner HF This filter is selected by the HF push button Default setting for this filter is 3100 Hz with the first 29 green LEDs and the last or 30th red LED illuminated Positioning of the Higher Corner Frequency is controlled by the digital rotary control See Figure Five ...

Страница 13: ...rom section 2 5 4 2 3 Center Frequency CF Once the operator has chosen the Bandpass Filter s range by means of the Upper and Lower Corner Frequencies the Center Frequency can be selected by pressing the CF push button When selected all green LEDs within the passband range will be illuminated In addition within five seconds of pressing the CF push button the operator may begin adjusting the Center ...

Страница 14: ...004 15 46 A graphic representation of the Center Frequency Filter is shown below reproduced from section 2 5 4 3 Noise Reduction NOISE Noise reduction shown below in the ADSP graph is obtained via a digital process which is initiated by pressing the NOISE push button When selected the green LED next to the NOISE push button illuminates See Figure Seven Figure Seven ...

Страница 15: ... of the Noise button is illustrated in the graph below reproduced from section 2 1 4 4 Spectral Noise Subtraction SNS TM Spectral Noise Subtraction is the special process of subtracting noise and that portion of the spectrum where voice modulation is not used It is selected by pushing the SNS TM push button When selected the LED next to the SNS TM push button illuminates See Figure Eight Figure Ei...

Страница 16: ...Filter on 1000 Hz 200 Hz No Yes No DATA BANDWIDTH AMTOR Filter on 2175 Hz 150 Hz SITOR Filter on 1700 Hz 150 Hz PACTOR Filter on 2175 Hz 200 Hz ALE Filter on 1725 Hz 1125 Hz Two digital filters are used in the eight PRESET functions For voice and CW functions a filter with a shape factor of 1 1 130 ms delay is used The low center and high frequency points of this filter can be adjusted to reduce a...

Страница 17: ...memory For information on transferring data memory parameters see Section 4 6 Selecting the PRESET function activates the last used preset memory and causes the two red LEDs above the selected function to become illuminated The digital rotary control can then be used to change to any of the eight preset locations See Figure Nine Figure Nine 4 6 User Memory USER Seven locations are provided for use...

Страница 18: ...r six seconds When the associated LED pair changes from being on continuously to blinking release the USER switch The memory and its old program have now been successfully cleared Figure Ten By the same process a Preset Memory location can be selected modified and then entered into a User Memory location 4 7 Bypass BYPASS The BYPASS push button is a toggle that determines whether or not the ADSP T...

Страница 19: ...gital rotary control affects ADSP TM functions as follows Preset Memory PRESET Set Location User Memory USER Set Location Spectral Noise Subtraction SNS TM Set Level Low Frequency Corner Filter LF Set Frequency High Frequency Corner Filter HF Set Frequency Center Frequency Filter CF Adjusts Frequency Center 4 9 LED Display 4 9 1 Off Condition When the unit is in bypass mode all LED indicators exce...

Страница 20: ... One is used as a spectral noise subtraction peak reading meter If LF CF or HF buttons are depressed the lower corner frequency the upper corner frequency and or the bandwidth frequencies outside the passband are indicated by red LEDs The selected corner or center frequency can be set by the ADJ for ADJUST knob When bandpass is activated both green and red LED displays change to VU type metering w...

Страница 21: ...ection 4 4 ADSP TM Bypass BYPASS Section 4 7 Low Frequency Corner LF Section 4 2 1 High Frequency Corner HF Section 4 2 2 Center Frequency CF Section 4 2 3 4 11 Toggling Between Bandpass and User or Preset This unit includes the ability of allowing the user to toggle between the currently selected bandpass and any Preset or User Programmed conditions This provides the user the ability to listen an...

Страница 22: ...the PRESET or USER setting pushing the PRESET or USER button twice in succession will update the Bandpass settings to those of the PRESET or USER 4 12 Conclusion The foregoing technical operational description has been generated by SGC to provide a highly intuitive and friendly interface between an operator and the ADSP TM SNS TM operating modes unique to this unit This design is exclusive and pro...

Страница 23: ... to the PowerTalk head the following is a detailed list of changes For the next sections refer to the drawing of the PowerTalk head in Figure 1 of this manual 5 1 Keys Deleted VOL The VOL select button is deleted The volume adjustment is now a potentiometer See Also section 5 3 VOLUME POTENTIOMETER A secondary function of the VOL button was to escape in the middle of a SHIFT or PRGR key code seque...

Страница 24: ...e of 64 pre programmed channels These are ITU channels 101 to 153 and 155 to 165 Channel 154 is not used The key sequence is BANDS then adjust the TUNING KNOB to select one of 64 ham channels then push BANDS or wait for time out to set the receive and transmit frequencies RX The RX button sets the displayed frequency into the RX frequency memory To set the RX frequency first adjust the displayed f...

Страница 25: ...wo frequencies These two memories and the mode along with the RX TX FLIP buttons determines the receive and transmit frequencies Setting FLIP Mode To set the FLIP mode display frequency on the LCD then adjust the TUNING KNOB to the desired transmit frequency then press the TX button Then adjust the TUNING KNOB to the desired receive frequency and press the RX button RX and TX will contain differen...

Страница 26: ... may be selected If you wish the displayed i e receive frequency to be rounded off to the step boundary push the OPTION button instead of pushing the STEP button the second time This will set the step value into memory and round off the display to the step boundary SQUELCH LEVEL The squelch level is adjusted by the TUNING KNOB which replaces the up and down arrows SCAN BY FREQUENCY The scan by fre...

Страница 27: ...lue Scanning by channel will resume with the new rate value DEFINE SCAN BANK In the define scan banks function the next scan bank memory is optionally selected by the TUNING KNOB which replaces the up and down arrows The key sequence is PRGR SCAN enter bank enter channel or optionally rotate the TUNING KNOB to select the next scan bank memory PRGR DELETE SCAN BANK In the delete scan bank function ...

Страница 28: ... categories basic and advanced Basic key functions do not require the use of the SHIFT FUNC keys Advanced operations do require the use of the SHIFT FUNC keys and may involve several key strokes 6 1 Key Functions BASIC FUNCTIONS Power ON OFF Press POWER NOTE When you first turn on the SG 2000 it will automatically switch to the last frequency used Increase Volume To increase or decrease volume rot...

Страница 29: ...Q enter transmit frequency PRGR EXAMPLE To enter the duplex frequency 3920 5 KHz receive 3815 3 KHz transmit and Lower Sideband you would press PRGR FREQ 39205 FREQ 1 FREQ 38153 PRGR NOTE The 1 key toggles selection of LSB or USB in this example Increment Frequency NonFLIP Press FREQ then turn Tuning Knob clockwise Press SHIFT FUNC or FREQ to complete Decrement Frequency NonFLIP Press FREQ then tu...

Страница 30: ...lay Channel Press CHAN Change Channel Press CHAN until 4 dashes appear enter channel number CHAN EXAMPLE To call KMI on channel 401 press CHAN 401 CHAN MODE FUNCTIONS USB LSB Toggle Press 1 Observe front panel display changes Voice Telex Filter SwitchPress 2 Observe front panel display changes Squelch On Off Press 3 Observe front panel display changes and receiver is silenced if no signal is prese...

Страница 31: ...IFT FUNC 0 View Timer Frequency On Press SHIFT FUNC 1 Alarm Time Frequency Off Press SHIFT FUNC 2 Squelch Level Set Press SHIFT FUNC 3 then turn Tuning Knob left or right Noise Blanker On Off Press SHIFT FUNC 4 Beep each key stroke Press SHIFT FUNC 5 Alternate Time Date Press SHIFT FUNC 6 SWR Forward Reverse Press SHIFT FUNC 9 SCAN FUNCTIONS Scan by FREQUENCY RADIO MUST BE IN FREQUENCY DISPLAY MOD...

Страница 32: ...can Bank s Press SCAN if freq displayed press CHAN again enter bank s then SCAN Define Scan Bank Press PRGR SCAN enter bank 0 9 enter channel in bank OPTIONAL press Up or Down for next scan bank memory PRGR Delete Scan Bank Press PRGR SCAN enter bank turn tuning knob clockwise SHIFT FUNC 7 DEFINE MEMORY Define User Channel Simplex Press PRGR CHAN enter channel FREQ enter RCV frequency FREQ set par...

Страница 33: ... Fax 206 746 6384 Tel 206 746 6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 Set Time ON Press PRGR 5 on time turn Tuning Knob counterclockwise off time PRGR Set Timer On Frequency Press PRGR 5 FREQ receive frequency FREQ mode PRGR Set Timer on CHAN Press PRGR 5 CHAN enter CHAN number PRGR ...

Страница 34: ...AN To execute channel change Ham Radio Use Here s all you need to do to get on to 14 290 0 in the 20 Meter Ham Band and tune down the band from this frequency POWER To turn on the radio PRGR FREQ Six dashes will appear 1 4 2 9 0 0 Frequency desired PRGR To execute frequency change Then to QSY down the band move frequency down simply touch Move to any Frequency FREQ turn Tuning Knob counterclockwis...

Страница 35: ...adio is in the Program mode This mode is used to make permanent or temporary changes to the memories of the SG 2000 Think of this button as the Enter key SCAN Upper left corner of display This is activated when the radio is Scanning Note that the SG 2000 has several ways to scan by Channel by Frequency and by Band These functions are fully explained in the section Advanced Operations later in this...

Страница 36: ...tenna coupler is reporting tuned system TND if the 20 dB receive attenuator is active ATT and if the optional noise blanker NB is active REFER TO DRAWING figure 1 Left to Right Bottom Half of Display Timer Lower left corner of display Indicates on or off status of radio timer Small Numerals Lower left corner of display Displays either the date or the time from the SG 2000 system clock FWD S or SWR...

Страница 37: ...transmitter and means that transmitter power output is being reduced to correct the condition HI LO PWR Lower left corner of display This indicates whether the transmitter is in the high or low power mode High power output is 150 watts PEP on SSB and 150 watts CW while low power is 50 watts PEP and CW output Red LED s There are two red lights which are located in the lower left corner of the SG 20...

Страница 38: ...FT FUNC key The key pad of the SG 2000 may be operated with or without a confirming beep when each key is pressed 8 1 Primary Keyboard Functions In this section we will discuss the various primary keyboard functions Let s start our exploration left to right beginning with the top row of buttons and working left to right RX This function displays the frequency being received or transmitted If the C...

Страница 39: ...r radios which have memories numbered 1 to 99 The SG 2000 has memories numbered from 1 to 2520 644 of which are preprogrammed and 100 of which are user definable Channel E0 is the international distress frequency 2182 KHz The SG 2000 comes preprogrammed with all standard marine ITU and most SITOR channels see ITU programmed frequency chart The SG 2000 has the capability to hold up to 100 operator ...

Страница 40: ... true AM detector In transmit the SG 2000 transmits compatible AM sometimes called AME meaning AM equivalent which is single sideband with 50 re inserted carrier 2 A3J Single Sideband This is the most commonly used method of voice transmission and is very efficient because all the transmitter power is devoted to carrying voice information No power is wasted by transmitting a carrier 3 A3A Single S...

Страница 41: ...e Technical note for advanced users SG 2000 s that have been ordered for ALE Automatic Link Establishment or adaptive HF controller service employing Digital Signal Processing DSP systems are specially modified to use the VOC TLX switch to turn the automatic receiver gain circuits AGC on and off This configuration is selected by moving a jumper on the exciter board of the radio ALE and other advan...

Страница 42: ...verload when communicating with nearby stations Signal overload occurs only when your location is extremely close to another transmitting station or the amount of signal arriving at your location is extremely high due to high power transmitters and high gain directional antennas being used If your SG 2000 is operated in the area of high power broadcast stations you may wish to order the optional B...

Страница 43: ... setting preferred by most users is the clock function Time is displayed in military 24 hour format If you are making position sightings you may wish to check the clock periodically against the U S Bureau of Standards time stations WWV and WWVH These may be found 24 hours a day on 2 5 5 10 15 and 20 MHz providing time of day storm warnings and navigation aid updates including the status of GPS sat...

Страница 44: ...f the scan can be changed to direct the scan to the desired frequency range If the squelch is activated in scan the unit will continue scanning until activity breaks the squelch The unit will then pause for 5 seconds and if there are no more breaks in the squelch the unit will continue in the original direction The scan channel mode is similar to the frequency mode in that when activated the unit ...

Страница 45: ...described as follows Control Head This key is used to view the Control Head number pre programmed by the manufacturer see INTCM XCV key in preceding section View Timer These two keys are used to preview the pre programmed alarm times and their corresponding channel or frequency SQL Level This function allows you to set a squelch level by rotating the Spinner Knob clockwise or counterclockwise To o...

Страница 46: ...n when in the PRGR mode Display Engaging this key directs the date and time to flash intermittently on the display in 2 second intervals thus allowing the operator hands free access for viewing time and date Beep This key is used to engage audible sound a beep when any key is depressed To turn off the beeping sound press the SHIFT FUNC plus BEEP keys again Back Light This function engages the back...

Страница 47: ...to be contained in that bank The Spinner Knob is used to step through each bank Lock Feature The SG 2000 can be limited to channelized operation This function is used to prevent transmission on any frequency other than the legal ITU channels This is useful in areas where there are restricted frequencies in which to operate See Transmit Channel Locking of this manual for the sequence to turn the fe...

Страница 48: ...ned on that the radio comes up at partial volume The SG 2000 always comes on at its last volume setting before it was last turned off Now notice the frequency channel portion of the display The indicator to the left of the numbers will inform you whether CHN channel number or FRQ frequency is being displayed If Channel is displayed go to the CHANNEL section to continue operating in the channel mod...

Страница 49: ...ice on these channels could interfere with data reception As you can imagine if this feature was not incorporated it would be possible to enter channel 812 a SITOR channel accidentally when you meant to enter channel 812 a semi duplex ITU voice channel Use the following sequence to change to a Telex SITOR channel 1 Set mode to TLX by pressing the VOC TLX key TLX will be displayed on the right hand...

Страница 50: ...mit frequency go to Step 4 Otherwise keep reading Optional After you have keyed in the digits for the direct entry frequency you may change two other variables You can specify mode and specify a transmit frequency if you wish it to be different from the receive frequency 3 A You may press the FREQ button again at this time to enter MODE information and select the desired sideband USB or LSB 3 B Yo...

Страница 51: ...at the same pitch as the CW sidetone emitted from the control head speaker When this is done you will be operating on the same frequency as the station you wish to work If you then wish to adjust the note or tone of the CW station this may be done with the clarifier You will be able to adjust the note between 400 and 1600 Hz SPECIAL NOTE Do NOT use the SG 2000 on CW in the LO PWR mode If you desir...

Страница 52: ...tion 7 Press the PRGR key for simplex operation and to end the programming sequence Enter a Duplex Channel into Memory If the desired channel is a duplex channel e g different receive and transmit frequencies these additional steps are required 1 Follow steps 1 through 6 as shown above under Entering Simplex Frequency into Memory 2 After step 6 press the FREQ key once more Six dashes will be displ...

Страница 53: ... SG 2000 has 6 channel banks number 00 to 05 Each of these banks will hold up to 10 channels complete with mode and offset if duplex The entry sequence is 1 Press the PRGR key 2 Press the Scan key Note The display will show the PRGR indicator active with the large digit display showing a 0 on the far left 3 Enter the desired bank number to be programmed 0 5 The display will show the bank number on...

Страница 54: ...nual 50 SGC Inc SGC Building 13737 S E 26th St P O Box 3526 Bellevue WA 98009 USA Fax 206 746 6384 Tel 206 746 6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 INTCM XCV 7 Press the PRGR key to end the function ...

Страница 55: ...ncy Specific Range This is an advanced function and should be studied closely Also called Program or Band scanning this capability allows the SG 2000 to scan in a particular mode between two frequencies There are two steps to using band scanning with the SG 2000 First you will need to load channels into the scan brackets This tells the radio the range within which to scan When you are done using t...

Страница 56: ...n the frequency range bracketed the radio will simply go low to high or high to low depending on whether you have rotated the Spinner Knob clockwise or counterclockwise If you begin scanning frequencies which are outside of the range the radio will only scan to the range E G If you start scanning down from 28 400 MHz the radio would scan down until it got to 3 9 MHz and would then scan only from 4...

Страница 57: ...N If dashes appear press CHAN again Note If there are no keys pressed within 4 seconds the unit will start scanning automatically from the original channel on display at the start of the function 3 To change the direction of the scan or to step through the channels rotate the Tuning Knob clockwise or counterclockwise 4 To allow the pause on detection press the squelch by pressing 3 or SQL 5 To cha...

Страница 58: ...t of the function 4 Press the SCAN key again to begin scanning 5 To change the direction of the scan or to step through the scan banks rotate the Tuning Knob clockwise or counterclockwise 6 To allow the pause on detection press the squelch by pressing 3 or SQL 7 To stop the scan simply press the SCAN key 8 7 Changing Frequency or Channel Scan Rates Separate scan rates are available for frequency o...

Страница 59: ...lk Manual 55 SGC Inc SGC Building 13737 S E 26th St P O Box 3526 Bellevue WA 98009 USA Fax 206 746 6384 Tel 206 746 6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 b 2 steps per second c 5 steps per second ...

Страница 60: ...wise or counter clockwise to change the rate to the following a 1 channel per 40 seconds b 1 channel per 20 seconds c 1 channel per 10 seconds d 1 channel per 5 seconds e 1 channel per 2 seconds f 1 channel per second g 2 channels per second h 5 channels per second 4 This function will automatically time out after 4 seconds Change Frequency Scan Step 1 Press the SHIFT key 2 Press the FREQ key 3 Ro...

Страница 61: ...PowerTalk Manual 57 SGC Inc SGC Building 13737 S E 26th St P O Box 3526 Bellevue WA 98009 USA Fax 206 746 6384 Tel 206 746 6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 d 5000 Hz per step ...

Страница 62: ...y Alarm Time ON and Frequency 1 Press the SHIFT FUNC key 2 Press 1 or LSB USB keys Display Alarm Time OFF 1 Press the SHIFT FUNC keys 2 Press 2 or VOC TLX Program Time ON OFF 1 Press the PRGR key 2 Press 5 or TIMER 3 Type in 1 4 digits for time on in 24 hour format 4 Rotated the Tuning Knob counterclockwise to program off time or PRGR to end Program Time ON Frequency 1 Press the PRGR key 2 Press t...

Страница 63: ...ncy desired 9 Press the PRGR key to end or the FREQ key to repeat settings Program Timer on Channel 1 Press PRGR 2 Press 5 or TIMER 3 Press CHAN 4 Type in desired channel number 5 Press PRGR Clock Date To toggle between time of day 24 hour format and date Press Clock Date Set Clock 1 While clock is displayed press the PRGR key 2 Press 6 or Clock Date 3 Type 6 digits for time desired ie 131500 FOR ...

Страница 64: ...enuator on or off Press the 20 dB ATTN key Power HI LO To change output power level Press the PWR Hi LO key Volume To change the volume level adjust the Volume knob Intercom To activate the intercom 1 Press the 7 or INTCM XCV keys 2 Depress a number key 1 8 for any specific control head or 0 for all control heads 3 Depress the 7 key to disperse Control Head Number Display To display control head n...

Страница 65: ...PowerTalk Manual 61 SGC Inc SGC Building 13737 S E 26th St P O Box 3526 Bellevue WA 98009 USA Fax 206 746 6384 Tel 206 746 6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 ...

Страница 66: ... counter clockwise to step through available levels Noise Blanker To turn RF Noise Blanker on or off optional 1 Press the SHIFT FUNC key 2 Press the 4 or SPK key Beep To enable a beep for every key stroke 1 Press the SHIFT FUNC key 2 Press the 5 or TIMER key Display Date Time To toggle between constant date time display or to alternate date time display 1 Press the SHIFT FUNC key 2 Press the 6 or ...

Страница 67: ...commend that this function be invoked whenever you are using an SG 2000 in a maritime mobile situation where only one operator who is knowledgeable about direct entry of frequencies is aboard In this way the persons aboard the vessel who might need to operate the SG 2000 in an emergency need only be taught how to call for help on the desired emergency channels Please note that the channels include...

Страница 68: ...allation where channelized operation only is allowed you may disable the all frequency transmit capability of the SG 2000 You may not wish to disclose the unlocking sequence to some operators Simply say that the radio is type approved for ITU channels and it includes reception capabilities for all frequencies You will be able to demonstrate that it will not transmit on unauthorized frequencies Tem...

Страница 69: ...6310 1 800 259 7331 1994 SGC Inc June 28 2004 15 46 9 0 Schematics PowerTalk Audio Circuits J50100911 Sh 1 of 5 PowerTalk Power and Mic Circuits J50100911 Sh 2 of 5 PowerTalk ADSP Control Circuits J50100911 Sh 3 of 5 PowerTalk MicroProcessor Interface J50100911 Sh 4 of 5 PowerTalk LCD Display Circuits J50100911 Sh 5 of 5 ...

Страница 70: ......

Страница 71: ...lay 56 CW 12 DEFINE MEMORY 28 Delete 41 57 Delete a Channel from Memory 47 DELETE SCAN BANK 23 Deleting Errors in Entry 47 Display 41 Display Date Time 57 Display Alarm Time OFF 54 Display Alarm Time ON and Frequency 54 Display LCD 30 Enter a Duplex Channel into Memory 47 Enter a Simplex Channel into Memory 46 Fine Tuning CW Operation 46 FLIP Mode 21 FREQ 30 33 Frequency 42 FREQUENCY FUNCTIONS 25 ...

Страница 72: ...FF 54 Program Timer on Channel 55 Program User Channel into Memory 46 PWR Hi Lo 37 RATE 40 RCV 30 Red LED s 32 RF Noise Blanker 40 57 S or SWR 31 Sample Entries 29 SCAN 22 23 30 39 42 SCAN BANK 23 Scan by Channel Banks 51 Scan by Channels 51 Scan by Frequency General 49 Scan by Frequency Specific Range 49 SCAN FUNCTIONS 27 SCAN RATE 23 Scanning Functions 48 Set Clock 55 Set Date 55 SHIFT FUNCTIONS...

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