Protek 3201 User Manual Download Page 31 | Manualshive

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Protek 3201 User Manual Download Page 31

3. Scan modes
Selects the manner in which signal levels are scanned and displayed on the LCD.
There are three scan modes to choose from, Search, Manual and Channel scan.
☞ Press the following key sequence to display the scan mode menu:

(select the Scan menu) (select the desired scan mode) See below

MENU

ENTER

ENTER

▶ Manual Scan: (Menu Scan)
A signal level frequency is entered from the keyboard
And is displayed as the center frequency.
The frequency span is set by a frequency selected form
The step frequency Menu.
▶ Channel Scan: (CH Scan)
Names and frequencies of signal levels of interest may
Be entered and stored in the channel memory prior to
Scanning. When scanned these signal levels will be
Displayed along with their frequencies and name.
▶ Search Scan: (search)
Scans and displays signal levels between a start and
Stop frequency. The start and stop frequencies are
Entered from the keyboard and are displayed on the
LCD

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Summary of Contents for 3201

Page 1: ...99 Washington Street Melrose MA 02176 Fax 781 665 0780 TestEquipmentDepot com ...

Page 2: ...ⅰ ⅰ ...

Page 3: ...ⅱ ⅱ ...

Page 4: ...ⅲ ⅲ ...

Page 5: ... 9 Step Frequency The scanning frequency increment value set by the page 49 10 Reception Mode The type of modulation needed for aural reception of the incoming signal Note a CW or a signal other than a Narrow Band FM NBFM wideband FM WBFM AM or SSB may be displayed by selecting a reception mode which has the appropriate bandwidth see page 5 The Reception mode is selected by pressing the button 11 ...

Page 6: ...tures 4 Ⅱ Specifications 4 Ⅲ Precautions 7 Ⅳ Functional Description 9 1 Panel Description 9 Ⅴ Basic operation 12 1 General 12 1 Prior to connecting to a power source 12 2 Input connection 12 3 Powering the unit on 12 4 Entering a Frequency value 13 5 Scanning 13 6 Positioning the Frequency marker 14 7 Power Off 14 2 Manual Scan 14 3 Ch Memory Scan 16 1 1 ...

Page 7: ... Scan Modes 4 Sweep Mode 5 Edit Channel 5 1 Selecting Edit Channel 5 2 Assigning a Channel number 5 3 Entering a Channel name 5 4 Insert Function 5 5 Delete Function 1 6 Setup Memory 6 1 Setup Memory 6 2 Save and Load setups 6 3 Title Names 1 7 Data Memory 7 1 Data Memory Setup 7 2 Saving and Loading 7 3 Title name 17 19 19 21 22 22 22 23 23 23 23 26 27 28 28 30 30 32 32 32 32 34 35 37 37 38 38 2 ...

Page 8: ...enu 5 Printer Menu 6 Copy Set Mode 7 External Attenuators 8 Test Set Menu 9 SCRB Menu 10 Battery Check 11 Keyboard Buzzer 3 Function Keys 1 RUN 2 STEP 3 MODE 4 SQL Squelch Level 4 LCD Men u 1 LCD Contrast 2 LIGHT 3 GRID 4 PRINT 39 39 41 42 42 43 43 44 44 45 46 47 47 48 48 49 49 49 50 51 51 51 52 52 53 3 3 ...

Page 9: ... Wide Banc FM W FM AM Single Side Band SSB signals Built in 2GHz Frequency Counter PLL tuning system for precise frequency tuning Up to 160 channels may be scanned and displayed on the LCD Built in Speaker 192 X 192 pixel backlit LCD All functions are menu selectable Has a RS 232 and parallel interface II SPECIFICATIONS Reception Frequency Frequency range Freq Accuracy TXO Freq Accuracy display De...

Page 10: ...l below a full scale signal level frequency Functions Display modes Sweep modes Scan modes Hold modes Level hold modes Squelch function Copy function Spectrum display Multi Bar graph display 5 10 20 40 80 160CH Single Bar graph display Difference frequency display Frequency measurement level display Single Normal Free Run Free Single Manual CH Memory and Search scan Delay run Delay hold and delay ...

Page 11: ...ey depression or continuously on may be selected 1200 2400 4800 9600 BPS 8 Pin Mini Din 6 1 5V AA type NICD batteries 11V to 16V 400mA Max AC to DC adapter 12VDC car adapter Unit will shut off after 5 10 20 or 30 minutes of idle time menu selectable Physical specifications Operating Temperature Humidity Storage Temperature Dimension Weight 0 to 40 at 35 85 RH 10 to 50 4 W x 9 H x 1 77 D Approx 1 4...

Page 12: ...e batteries are used may cause these batteries to over heat explore or leak Antenna Due to the broad applications of this unit the supplied antenna is for the 800MHz cellular band It may be necessary to use a different antenna more appropriate for your application The receiving conditions vary with location and antenna On some occasions it s not possible to receive the desired signals due to stron...

Page 13: ...he power is turned on perform the following procedure Press the power button to shut the power off Turn the unit on again while pressing the and keys simultaneously This will clear the internal memory and return the unit to normal operation Note An alternate method to clear a malfunctioning unit is to select ALL RESET from Test set menu located in the system menu CLR ENTER 8 8 ...

Page 14: ...IV FUNCTIONAL DESCRIPTION 1 PANEL DESCRIPTION 9 9 ...

Page 15: ...the Signal levels their characteristics frequency amplitude etc and pertinent system data 7 Press this button to turn the power on Press again to turn the power off 8 KEY Press the key to display the LCD menu The LCD menu items consists of LCD Contrast control LCD Grid select Backlight and Print command These items are displayed when the key is pressed and selected with the keys 9 Pressing the key...

Page 16: ... decimal points If a decimal point is already entered this key is then used for clearing a keyboard entry 14 This key is used for incrementing and decrementing the Market frequency and for selecting items in the various menus 15 Rotary Dial Knob Performs the same function as the up down key but at a faster rate The rotary dial knob allows one handed operation 16 DC Input Jack The AC DC adapter and...

Page 17: ... The welcome screen will be displayed followed by the last screen that was displayed prior to shutting the power off 3 To adjust the LCD contrast press the key then press the keys until the LCD display is set to the desired contrast then press 4 See the graphic below for a description of the LCD display when powered on 5 Adjust the volume control for an appropriate sound level If the signal level ...

Page 18: ...he decimal point has already been entered pressing the Key will clear the entered frequency value 3 The frequency value has different functions for the Manual Search and Cannel scan The entered frequency in manual scan sets the Center frequency where as the entered frequency values in search scanning sets the Start and stop frequencies In the Channel scan mode the entered frequency value is stored...

Page 19: ...When the unit is powered on again the screen prior to powering off will be displayed 2 Manual Scan Mode 1 when Manual scan mode is selected It is necessary to enter the following information a The Center frequency value from the keyboard b The type of carrier signal modulation from the menu c The Frequency Span which is set by the Step frequency The Frequency span is determined by the number of ch...

Page 20: ...by pressing the keys or rotating the dial knob The position of the market may be moved by up to 160 channels 80 channels to 80 channels 6 Pressing the key will highlight the RUN icon and scanning will start from left to right In the 2 channel mode the market center frequency and the difference frequency are scanned and displayed Note Scanning is not available in the signal channel or counter mode ...

Page 21: ...ncy may also be entered in to the channel memory from the keyboard by pressing the to keyboard keys and the see page 12 for entering frequencies The type of reception demodulation must also be selected see page 48 The step frequency will be indicated but is not used for the Channel scan mode 5 Pressing the key will start the scan from the left most position The RUN icon is highlighted 6 When scann...

Page 22: ...ey sequence Select the Scan menu Select search Scan 3 The START STOP STEP frequencies and the reception mode demodulation type will be displayed at the bottom of the LCD with the start frequency highlighted 4 Enter the START FREQUENCY from the keyboard This frequency will now be displayed as the start frequency and at the market frequency indicator See page 12 When the START frequency is entered S...

Page 23: ...quency When the stop frequency is reached the scanning will start over at the start frequency if Free Run or Normal sweep was selected or stop if Free single or single sweep was selected 7 Pressing the key again will halt the scanning The frequency and amplitude of the signal where the Marker frequency indicator halted will be displayed 8 If the Scan mode is changed to Manual Scan the frequency wh...

Page 24: ... channel difference mode press the following key sequence Select the Function mode Select 2 channel Difference 2 Enter the marker frequency to be measured from keyboard 3 Select or enter from the keyboard the difference frequency to be measured form the step frequency menu press the key 4 The LCD will display the bar graphs of the marker frequency and difference frequency amplitudes The difference...

Page 25: ...10 positions are written Additional frequencies will then displace previously stored frequencies starting with the 1 position 5 Pressing the key again will stop the counter The last measured frequency will be the displayed at the marker indicator 6 A frequency stored in the counter data memory may be recalled by selecting the desired frequency with the keys and pressing the F4 key This frequency m...

Page 26: ... keyboard the frequency to be measured If using the Manual scan mode set the center frequency of if using the search scan input the start frequency 4 Set the step frequency to 0 This may be accomplished as follows Select the step frequency menu by pressing the key Then press the following key sequence 5 Start the scan by pressing the key The scan will start from the left side of the LCD at a rate ...

Page 27: ...Set the slide switch according to the type of battery being installed To the left for alkaline or manganese batteries dry To the fight for NiCd batteries 4 Insert the new batteries into the case Observe battery polarity 5 Replace the battery cover and reinstall the screw 6 Check to the Battery test indicator in system menu see page 48 for the condition of the battery installed 7 For a quick charge...

Page 28: ... press The key to make the selection 1 Main menu display To display the main menu Press the following keys select the desired menu MENU ENTER POWER MENU ENTER Main Menu Display 2 Function mode The Function mode selects the type of LCD display Press the following keys to select the Function mode select the Function mode select the desired display MENU ENTER ENTER 23 23 ...

Page 29: ...uency displayed on the LCD See figure 4 on page 25 Scans 20 Channels and displays their signal levels as bar graphs The channel at the marker indicator will have its amplitude and frequency displayed on the LCD See figure 5 on page 25 Scans 10 Channels and displays their signal levels as bar graphs The channel at the marker indicator will have its amplitude and frequency displayed on the LCD See f...

Page 30: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com ...

Page 31: ... entered from the keyboard And is displayed as the center frequency The frequency span is set by a frequency selected form The step frequency Menu Channel Scan CH Scan Names and frequencies of signal levels of interest may Be entered and stored in the channel memory prior to Scanning When scanned these signal levels will be Displayed along with their frequencies and name Search Scan search Scans a...

Page 32: ... squelch level setting and halt at the End of the screen Pressing the button will then Restart the trace from the beginning NORMAL The display trace will sweep across the screen until Incoming signal amplitude is greater than the squelch Level The trace will halt at this point and can be restarted By pressing the up key or automatically if a hold Item in the menu is selected SINGLE Operates the sa...

Page 33: ...lect CH Scan Pg 29 2 Select the setup menu from the main menu and choose a memory bank where the Signal levels are to be stored Bank 1 though band 10 may be selected Each bank stores up to 160 channels Press the following key sequence to select the setup up and a memory bank Select setup menu Pg 29 Select the desired memory bank Pg 29 3 Select the CH Edit Menu by pressing the following key sequenc...

Page 34: ...Hz 5 WPLJ 95 5 MHz 6 WCBS 101 1 MHz 7 WPBS 215 75 MHz 8 WRCA 71 75 MHz 9 WQXR 104 3 MHz 10 BILL S TAXI 153 2523 MHz EDIT CH MEMO Mem NO NAME FREQ 1 WLTW 107 6 MHz 2 WWOR 191 75 MHz 3 WPIX 203 75 MHz 4 WABC 179 75 MHz 5 WPLJ 95 5 MHz 6 WCBS 101 1 MHz 7 WPBS 215 75 MHz 8 WRCA 71 75 MHz 9 WQXR 104 3 MHz 10 BILL S TAXI 153 2523 MHz 29 29 ...

Page 35: ...r numerical sequence has been entered from the keyboard If a frequency has already been entered including the decimal point pressing this key will clear the frequency display CLR 5 3 Entering a name in to the Channel Memory 1 To assign a signal level a channel name or edit a Channel name in the Channel Memory refer to the example shown in section 51 select the channel to be named or edited by pres...

Page 36: ...s the key or rotate the dial knob until the letter of N appears in the reversed contrast cursor block 5 Example To enter the Channel name NHK 1 in to the channel memory use the following procedure See the below figure F1 NAME 2 Press the key to enter the second character Press the key or rotate the dial knob until the letter of H appears in the reversed contrast cursor block F1 3 Enter the remaini...

Page 37: ...NTER 5 5 DEL Delete function 1 Select the channel to be deleted by pressing the keys or by rotating the dial knob 2 Press the key to delete the channel F3 6 Setup memory 6 1 Setup Menu 1 The Setup memory menu enables you to save previously selected menu settings and recall them at a later date This provides fast display setups when time is of the essence 2 The menu settings for the LCD display scr...

Page 38: ...ER Select the set up menu Pg 33 Select a memory bank Pg 33 Press the to complete the setup F4 SET UP MANUAL SCAN 1 MANUAL 1 2 MANUAL 2 3 MANUAL 3 4 MANUAL 4 5 MANUAL 5 6 MANUAL 6 7 MANUAL 7 8 MANUAL 8 9 MANUAL 9 10 MANUAL 10 SET UP MANUAL SCAN 1 MANUAL 1 2 MANUAL 2 3 MANUAL 3 4 MANUAL 4 5 MANUAL 5 6 MANUAL 6 7 MANUAL 7 8 MANUAL 8 9 MANUAL 9 10 MANUAL 10 33 33 ...

Page 39: ...the key to highlight the icon at the bottom of the LCD This will recall from the selected memory location the previously stored menu selections display data and the title name F3 LOAD 4 Press the when finished F4 5 The following items are saved in the setup memory when the key is pressed F2 Marker frequency Reception mode Step Frequency Difference frequency Attenuator level Sweep mode Function mod...

Page 40: ...con located on the bottom left side of the LCD screen The alphanumeric character entry cursor will appear at the top middle of the LCD screen as a reversed contrast block F1 NAME 2 The Characters for the title name are selected with the Keys or the rotary dial 3 Press the key to select the desired character and to advance the character cursor to the next character position Numerical characters may...

Page 41: ...y F1 d Select the remaining letters using the same procedure as a above T V e Press the key to enter a space CLR f Press the numeric keys 9 5 0 1 g Press the key ENTER 5 A title name may be changed or edited by pressing the key and using the same procedure as in sect 6 1 F1 a Select the title name to be changed or edited with the keys or rotary dial b Press the key to highlight the character in th...

Page 42: ...e recalled at a later time In the counter mode 10 measured frequencies may be saved and then recalled To display the Data memory menu use the following key sequence MENU ENTER Select data memo Select Memory location See page 38 for saving and loading data in the data memory To quit the data memory press the key F4 Data Memory Menu for all Functions except counters Data Memory Menu for the Counter ...

Page 43: ... the keys and pressing the Load key F3 3 Press the End key when finished F4 4 Frequency measurements in the counter mode may be saved and recalled in the data memory when in the Run mode pressing the key will continuously store and update the frequencies displayed at the marker indicator F1 7 3 Assigning a title name To assign a title name to a display stored in the data memory use the following k...

Page 44: ...ting the dial knob until the audible signal is heard 3 Press when finished ENTER 9 Hold Mode The Hold mode may be activated for use in the NORMAL or Single sweep mode In hold mode scanning will be temporarily halted approximately 5 seconds when a signal Level amplitude is greater than the squelch level and then resumes scanning regardless of the signal level amplitude To activate the HOLD mode 1 P...

Page 45: ...seconds if the signal level amplitude remains greater than the squelch level If the signal level drops below the squelch level during the hold period scanning will restart Scanning will stop when a received signal level amplitude is greater than the squelch level then restart after the hold period irregardless of the signal level value during the hold period Scanning will halt when the signal leve...

Page 46: ...isabled Displays the maximum value of a signal level Holds and displays the value of a signal level Holds the peak variation of signal level for 40mS Holds the peak variation of a signal level for 120mS Holds the peak variation of a signal level for 200mS A LEVEL HOLD mode may be operated at all times while the 3201 is running Prior to scanning in a HOLD mode set all signal levels amplitudes to th...

Page 47: ...ST SET SCRB BATT CHECK BUZZER Selects the decibel measurement unit dB dBmV or dBmW may be selected Sets the amount of time the unit will shut of when if no keyboard entry is made Sets serial Baud rates or parallel port operation Selects the type of printer that is to be used for printing screen data Used for down loading the data memory to an external device Sets the reference level when external ...

Page 48: ...be selected Key sequence for selecting the Auto power off menu ENTER MENU MENU ENTER Select the power off menu Select the amount of idle time POWER OFF AUTO OFF 5 AUTO OFF 10 AUTO OFF 20 AUTO OFF 30 NONE POWER OFF AUTO OFF 5 AUTO OFF 10 AUTO OFF 20 AUTO OFF 30 NONE Power will shut off after 5 minutes of idle time Power will shut off after 10 minutes of idle time Power will shut off after 20 minute...

Page 49: ...e is needed Key sequence for selecting the I O setup menu ENTER MENU MENU ENTER Select the I O Setup menu Select Baud rate or parallel port 5 Printer Menu Displays the list of printers which may be connected to the 3201 for printing out display data PRINTER PRINTY ESC P TYPE MN TYPE PRINTER PRINTY ESC P TYPE MN TYPE Selects the optional Protek Printy part No PR 232 Selects ESC P type Epson printer...

Page 50: ...ata may also be written in to these memories from an external device The I O setup must be performed prior to using this feature See page 44 section 4 Key sequence for selecting the copy set menu ENTER MENU MENU ENTER Select the I O setup menu Select BPS or parallel port ENTER CLR MENU ENTER Select Copy Set menu Pg 45 Select Copy out Pg 45 Test Equipment Depot 800 517 8431 99 Washington Street Mel...

Page 51: ...he LCD will then change according to the dB value selected Example If a 20dB Attenuator is connected to the input Select 20dB from the ATT dB Set menu The reference level displayed on the LCD will change to 20dB Key sequence for selecting the ATT dB set menu ENTER MENU MENU Select the ATT dB menu Select the Standard Attenuator value ATT dB SET xx xxdB 0 0 dB 3 0 dB 60 dB ATT dB SET xx xxdB 0 0 dB ...

Page 52: ...n of the 3201 This utility compares the input signal level and the level detector output and creates a correction factor which is written in to a non volatile memory Users should avoid selecting this Initializes all settings and memory data This utility is normally used after replacing the internal Lithium battery Clears the Setup Data and Channel edit memories and returns them to their default st...

Page 53: ...ment Key sequence for selecting the BATT TEST menu ENTER MENU MENU ENTER Select BATT Check Displays the Battery Level Bar graph 11 Buzzer The keyboard buzzer when enabled will beep whenever a key is depressed The buzzer may be enabled or disabled through this menu The buzzer is normally enabled by default The key sequence for enabling or disabling the buzzer is ENTER MENU MENU ENTER Select the Buz...

Page 54: ...ep frequency determines the scanning frequency increment Example the frequency Marker indicator will increment every 50 KHz if a step frequency of 50 KHz is selected 3 The frequency span in the manual Scanning mode is also determined by the step frequency Span No Of channels per display as selected from the function menu multiplied by the step frequency Example If an 80 channel bar graph display i...

Page 55: ...ncy will enter a positive frequency value Pressing the key will enter a negative frequency value 0 1 3 MODE demodulation mode 1 Pressing the key displays the type of demodulation that is required for aural reception There are 4 reception demodulation modes available wide band FM Narrow band FM AM and Single side band F3 2 To select a reception demodulation mode press the keys or rotate the rotary ...

Page 56: ...el is greater than the squelch level 2 Halts the scan when the received RF carrier level is greater than the squelch level Scanning resumes when the RF carrier level falls below the squelch level 4 LCD MENU Pressing the key displays the following menu at the bottom of the LCD LCD Note The icon must not be highlighted prior to displaying the menu If RUN is highlighted press the key RUN LCD F1 LCD L...

Page 57: ...fter approximately 5 seconds after the last key entry ON The backlight is always on OFF The backlight is always off Press the ENTER key when finished 3 Grid LCD Press the key then the key to display the grid menu There are three items to choose from and selected see page 52 with the key or the rotary dial LCD F3 Grid selection menu Grid 1 Horizontal and Vertical grid lines are displayed 52 52 ...

Page 58: ...used is a serial printer or select the parallel port if the printer is a parallel printer See I O menu page 44 It is also necessary to select the type of printer to be used from the printer selection menu see page 44 To Print the LCD screen display the LCD menu by pressing the key and then press the key LCD F4 Key sequence for printing the LCD display ENTER MENU MENU ENTER Select the I O Setup men...

Page 59: ...54 54 ...

Page 60: ...and Pin Number When it connected to PC operate it using the MINI DIN Cable Option MINI DIN CABLE PIN NO SG 5 1 3 7 4 25PIN DSUB PIN NO 1 2 3 3 2 4 7 5 8 6 6 7 5 20 1 9PIN DSUB Signal Name FG RXD TXD CTS RTS DSR SG DCD COMPUTER PIN NO 1 2 3 3 2 4 7 5 8 6 6 7 5 20 1 Signal Name FG RXD TXD CTS RTS DSR SG DCD is PIN NO of 9PIN DSUB 5 Interface Transmitting and receiving data from PC are RTS CTS type N...

Page 61: ...quency Set up the MARKER on 80CH CH MODE SEARCH MODE Entering first frequency value will be set up on START frequency and Second frequency value will be set up on STOP frequency Ex START frequency on 500 0MHz STOP frequency on 600 0MHz K0500 0 CR START K0600 0 CR STOP ASC DATA CD 0DH Ex MARKER frequency L0 CR 2000 25625MHz STEP frequency L1 CR 12 5kHz DIFFERENCES STEP frequency L2 CR 4 5MHz COUNTE...

Page 62: ...BAR 5CH MODE A7 DIFFERENCE MODE A8 SINGLE MODE A9 COUNTER MODE Ex A1 CR BAR 160CH MODE 2 Scan Mode Setup B MANUAL MODE B1 CH MODE B2 SEARCH MODE Ex B1 CR CH MODE 57 57 3 Sweep Mode Setup C0 FREE RUN MODE C1 FREE SINGLE MODE C2 NORMAL MODE C3 SINGLE MODE Ex C0 CR FREE RUN MODE 4 CH BANK Setup D0 CH BANK in No 1 D1 CH BANK in No 2 D2 CH BANK in No 2 D3 CH BANK in No 3 D4 CH BANK in No 4 D5 CH BANK i...

Page 63: ...TOP MODE Ex F1 CR On DELAY RUN MODE 58 58 7 MAX HOLD Setup G0 OFF G1 MAX HOLD G2 HOLD Ex G1 CR On MAX HOLD 8 Receiving MODE Setup H0 N FM MODE H1 W FM MODE H2 AM MODE H3 SS MODE Ex H2 CR On AM MODE 9 SQUELCH LEVEL Setup I0 30H SQUELCH ON ONLY I1 31H SQUELCH ON 0dB Adding on 1dB I2 32H SQUELCH ON 1dB II 49H SQUELCH ON 25dB Ib 63H SQUELCH ON 50dB ld 64H SQUELCH OFF ONLY Ex I4 CR SQUELCH ON 3dB 10 CH...

Page 64: ...N frequency can be operated on MANUAL MODE only L7 Current frequency L8 COUNTER frequency can be operated on OUTPUT MODE only Ex L0 CR MARKER frequency output 10 12625 CR 10 12625MHz Reference to Frequency Output FORMAT 13 TITLE NAME and CH NAME Setup M0 TITLE NAME Up to 10 characters M1 CH NAME Up to 5 characters CH MODE only Ex M2 TEST2 CR NAME of TEST2 will be Memorized on current CH 14 TITLE N...

Page 65: ...LEVEL DATA Output R3 CH DATA and CH DATA Output each time 19 A T T LEVEL DATA Setup S0 ATT LEVEL DATA Ex S0 12 5 CR ATT LEVEL on 12 5dB Reference to ATT LEVEL DATA Setup 20 PRINTER MDOE Setup T0 PRINT MODE T1 ESC P MODE T2 NM MODE Ex T1 CR ESC P MODE 21 MARKER CH Setup V0 1CH V1 2CH V 9FH 160CH Ex V9 CR 160CH MARKER 22 Each CH Setup Output W0 MARKER CH W1 Indicate left W2 Current LEVEL CH Ex W0 CR...

Page 66: ... 7FH Demodulation LEVEL in HIGH Ex V9 CR Demodulation LEVEL Recommend not to use this function Special users only 26 TEST MODE OFF Setup Z0 TEST MODE OFF Recommend not to use this function Special users only Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com ...

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