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Page 3 - NTRODUCTION; Dynamic DAC Products

www.vxitech.com 3 I NTRODUCTION On May 1, 2003, VXI Technology, Inc. acquired Agilent Technology’s mechanical data acquisition product segment. During the transition period, Agilent branded manuals will be provided with the dynamic and static data acquisition products until the manuals have been reb...

Page 4 - Technical Support; See

VXI Technology, Inc. 4 S UPPORT R ESOURCES Support resources for this product are available on the Internet and at VXI Technology customer support centers. VXI Technology World Headquarters VXI Technology, Inc. 2031 Main Street Irvine, CA 92614-6509 Phone: (949) 955-1894 Fax: (949) 955-3041 VXI Tech...

Page 5 - Where to Find it - Online and Printed Information:; User’s and SCPI Programming Manual

Where to Find it - Online and Printed Information: System installation (hardware/software) ............ VXIbus Configuration Guide* Agilent VIC (VXI installation software)* Module configuration and wiring ....................... This ManualSCPI programming ..............................................

Page 7 - Agilent E1538A Enhanced Frequency/Totalize/PWM SCP; About this Manual

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 3 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP About this Manual This manual describes how to configure the Signal Conditioning Plug-on (SCP) using SCPI commands and explains the capabilities of this SCP. The contents of this manual are: • Int...

Page 8 - Introduction; -- Totalize positive or negative signal transitions

4 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Introduction The Agilent E1538A provides eight TTL compatible channels of digital I/O. Channels can be individually configured to perform any one of the following functions: • Input: -- Static digital state -- Frequency measurement -- Period meaur...

Page 9 - The Command Module driver with revision A.05.11 or later; Figure 1. Identifying the SCP and its ROM Revision

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 5 both full and half step modes.(requires 2 or 4 channels) The logical sense of input and output channels can be configured as inverted or normal. Input-configured channels have individually programmable threshold levels that can range from -46V to ...

Page 10 - Setting Configuration Switches; Locating switches; Figure 2. Switch Location and Example Settings

6 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Setting Configuration Switches The SCP has three packages of eight switches each. The package labeled OE (Output Enable) determines a channel’s I/O direction. The package labeled PU (pull-up) controls whether or not a channel is floating or pulled...

Page 11 - Installation; Figure 4 shows the screw terminal Option 11 for the E1419A.; Figure 3. E1538A Terminal Module Connections

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 7 Installation Installation for this Plug-on is identical to other SCPs and is covered in Chapter 1 of your Agilent E1415 or E1419 User’s Manual. Connecting To The Terminal Module The SCP connections for the Terminal Modules are shown on the self-ad...

Page 12 - Recommended Signal Connections; Note; Figure 4. E1419A Option 11 Terminal Module Connections

8 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Recommended Signal Connections Figure 5 shows the recommended method of wiring digital I/O channels, as well as the maximum voltage limitations for the E1538A. Figure 5 shows the shields connected directly to the E1415 ground. This is to limit pot...

Page 13 - Input and Output Characteristics; Input Characteristics; Figure 5. Recommended Connections and Voltage Limits

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 9 Input and Output Characteristics This section describes the E1538’s channel input and output electrical characteristics. Refer to Figure 6 for the following discussions. Input Characteristics When configured for input, E1538 channels provide digit...

Page 14 - VRS Mode; VRS enable ON is not allowed if PU enable is ON.; Figure 6. The E1538A Input/Output Characteristics

10 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP is to maintain a constant-level digital output while the input varies from millivolts to several tens of volts. For simple sensing of switches and open collector logic devices, a channel’s pull-up resistor can be connected by closing its PU switc...

Page 15 - formula; Output Characteristics; Programming With SCPI Commands; Figure 7. VRS Mode Input Characteristics

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 11 formula to calculate the protection resistor’s value. Figure 7 shows the VRS mode input characteristics. Output Characteristics The output stage of the E1538A is simply a MOS FET transistor that is configured as "open-drain" when the pull...

Page 16 - The value returned for the E1538A SCP is:; query SCP type @ ch 0; Configuring I/O Direction

12 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Checking the ID of the SCP To verify the SCP type(s) installed on your VXI module, use the SYSTem:CTYPe? (@<channel>) command. • The channel parameter specifies a single channel in the channel range covered by the SCP of interest. The first...

Page 17 - Determining the Input; query 2nd chan on SCP pos. 4; Set Input Logic Sense; To configure channels 40 to 43 to sense low input as logic 1

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 13 • Channels in <ch_list> must be input configured channels Determining the Input Threshold Level To determine a channel’s input threshold level, use the command:INPut:THReshold:LEVel? (@<channel>) Note Because the E1538 rounds <leve...

Page 18 - Reading Static; To set channels 40 through 43 to input digital states; default for all dig inputs; Figure 8. Input Static Digital States

14 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Reading Static Digital State This means reading a channel’s current digital state when an algorithm executes. This is the default function assigned to all digital input channels after *RST and at power-up. To set individual channels to this funct...

Page 19 - Totalize Positive or; ch 44 totalize reset at INIT; Figure 9. Input Totalize Count

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 15 Totalize Positive or Negative Edge State Changes Use [SENSe:]FUNCtion:TOTalize (@<ch_list>) to configure channels to totalize. Totalize means to simply count state transitions (either positive going, or negative going). Figure 9 A shows tot...

Page 20 - About Period and; The APERture mode sets a fixed duration that the SCP will use to

16 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP About Period and Frequency Measurements The E1538A actually measures signal period for both the period and frequency functions. If the measurement function is set to frequency rather than period, the SCP returns the reciprocal of the measured per...

Page 21 - Measure Frequency; To measure frequency at channel 45 with aperture of 1 second; INIT; Figure 10. Input Frequency

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 17 Measure Frequency Use [SENSe:]FREQuency:APERture <time>,(@<ch_list>) to configure the frequency counter channels’ measurement interval. Use [SENSe:]FUNCtion:FREQuency (@<ch_list>) to configure channels to measure signal frequenc...

Page 22 - Measure Period; Figure 11. Input Period

18 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Measure Period Use [SENSe:]PERiod:MODe APERture | NPERiods,(@<ch_list>) to select the measurement interval setting mode. Depending on the mode selected above use [SENSe:]PERiod:APERture <time>,(@<ch_list>) oruse [SENSe:]PERiod:N...

Page 24 - Measure Pulse Width; The value returned to an algorithm can be from 5; read puls width on chs 46&47; Figure 12. Measure Pulse Width

20 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Measure Pulse Width This means that the E1538 will measure the width of the logic 1 portion of a pulse. The pulse width is sent to the algorithm in units of seconds. To measure the high portion of a pulse (positive going edge to negative going ed...

Page 25 - Sense Quadrature; start algorithm execution

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 21 Sense Quadrature Position This means that the E1538 will convert a digital quadrature signal pair into an absolute 24-bit count. The count value can be read by the algorithm. The E1538’s quadrature position function increments a counter value eac...

Page 26 - Sense Rotational Velocity; The value read by the algorithm can range from; Figure 13. Sense Quadrature Position

22 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Sense Rotational Velocity This means that the E1538 will read the rotational velocity of a toothed wheel sensor. The E1538 measures tooth-to-tooth period and converts it into units of revolutions per second (RPS). This function can only be linked...

Page 27 - Figure 14. Sense Rotational Velocity

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 23 • <index_type> can be either of the strings "MISSing", or "EXTRa" • <ch_list> must be the first channel on the SCP, but can contain more than one channel provided that each channel is on a separate E1538. See following...

Page 28 - Programming Output; Controlling Output; OUTP:POL NORM a logical 1 output from the algorithm, or generated; Output Static; default for all digital outputs; Figure 15. Output Static Levels

24 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Programming Output Channels This section deals with all aspects of programming output channel functions. Channels are configured for output with the I/O direction switches (see "Configuring Input-Output direction" on page 6 ). A related e...

Page 29 - Variable Width Pulse Per; The command sequence to set-up this mode is:; start alg execution; Figure 16. Output Variable Width Pulse per Trigger

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 25 Variable Width Pulse Per Trigger This means that the channel generates a pulse whose width is specified by the algorithm each time the algorithm executes. The value sent by the algorithm can range from 7.87 µ Sec to 7.812mSec. The command sequenc...

Page 30 - Variable Width Pulse; Sec to; and continuous PWM train

26 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Variable Width Pulse Train (PWM) This means that the E1538 outputs a continuous train of pulses whose logic 1 pulse width is controlled by the algorithm. The frequency is set by a SCPI command before INIT. Use the following command sequence to se...

Page 31 - Variable Frequency Fixed; and continuous pulse train; The algorithm can now output a frequency value to channel 45:

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 27 Variable Frequency Fixed Width Pulse Train (FM) This means that the E1538 outputs a continuous train of pulses whose frequency is controlled by the algorithm. The logic 1 level pulse width is set by a SCPI command before INIT. Use the following c...

Page 32 - Variable Frequency; The frequency resolution is

28 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Variable Frequency Square-Wave Pulse Train (FM) This means that the E1538 outputs a continuous train of pulses whose frequency is controlled by the algorithm. The the duty-cycle of the waveform is always 50%. Use the following command sequence: S...

Page 33 - Rotationally Positioned; Figure 20. Four Modes of Rotationally Positioned Pulses

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 29 Rotationally Positioned Pulse Output This means that the E1538 will generate pulses which are positioned by angle (usually shaft angle). The rotational pulse function requires a rotational reference, and this is provided by the SENS:RVEL function...

Page 34 - Rotational Pulse; to the property specified by the command syntax.

30 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Rotational Pulse Command Usage Use SOURce:FUNCtion:RPULse (@<ref_channel>),(@<ch_list>) to link channels in <ch_list> to the rotational pulse function. The channel in <ref_channel> will be linked to the SENS:FUNC:RVEL func...

Page 35 - sense rvel for reference channel

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 31 Rotational Pulse Mode:Variable Angular Position, Preset Pulse Width (by angle) In this mode, the angular position of the pulses is controlled by the algorithm, and the width (duration in degrees) is preset before INIT. See Figure 21.Use the follo...

Page 36 - Figure 21. Variable Position, Width Preset by Angle

32 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Rotational Pulse Mode:Variable Angular Position, Preset Pulse Width (by time) In this mode, the angular position of the pulses is controlled by the algorithm, and the width (duration in seconds) is preset before INIT. See Figure 22. Use the follo...

Page 37 - Figure 22. Variable Position, Width Preset by Time

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 33 ALG:SCALAR’ALG1’,’Pos3’,300 preset ch 47’s pulse pos to 300 ° ALG:UPDATE . INIT start algorithm execution •• calculate values for NewPos(n) •ALG:SCALAR 'ALG1','Pos1',NewPos1 later, adjust channel 45’s position while algorithm running ALG:SCALAR '...

Page 39 - Figure 23. Fixed Position, Variable Width by Angle

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 35 Rotational Pulse Mode:Variable Pulse Width (by time), Preset Angular Position In this mode, the pulse duration (in seconds) is controlled by the algorithm, and the angular position is preset before INIT. See Figure 24. Use the following command s...

Page 40 - preset ch 45 pulse width to 5ms; Figure 24. Fixed Position, Variable Width by Time

36 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP SOUR:RPULSE:POS:ANGL 140,(@146) preset channel 46 pulse position to 140 degrees SOUR:RPULSE:POS:ANGL 260,(@147) preset channel 47 pulse position to 260 degrees SOUR:RPULSE:VART TIME,(@145:147) algorithm will control pulse duration by TIME Algorit...

Page 41 - Stepper Motor Control; Figure 25. Relationship of

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 37 Stepper Motor Control Use the commandSOURce:FUNCtion:STEPper <preset_pos>,<mode>,<max_vel>,<min_vel>,(@<ch_list>)to control stepper motors. The E1538 can operate 2 or 4 phase motors in full, and half step mode. Posit...

Page 42 - motor phase channel group can not be split across SCPs.; channel 0 reads voltage

38 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP motor phase channel group can not be split across SCPs. The algorithm sends new position values to the first channel in a motor-group. The algorithm reads the current position value from the second channel in the motor-group. Example of full step...

Page 46 - SCPI Command Reference; Command Syntax

42 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP SCPI Command Reference Most of the E1538’s commands were available since its introduction. A small number of commands are only available with E1538’s built after February 1998. The following table indicates these new commands with an X in the ...

Page 48 - Parameters; Parameters; mode

44 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP INPut:POLarity INPut:POLarity < mode >,< ch_list > sets logical input polarity on a digital SCP channel. Parameters Comments • If the channels specified are on an SCP that doesn’t support this function, an error will be generated. See...

Page 49 - level

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 45 INPut:THReshold[:LEVel] INPut:THReshold[:LEVel] < level >,(@< ch_list >) • allows programmatically setting the input threshold level for each input configured channel. Parameters Comments • <level> can be set to a resolution of ...

Page 50 - select

46 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Note Because the E1538 rounds <level> to the nearest multiple of 0.375, the returned value can be different from the value sent. • INP:THR:LEV? returns a numeric value between -46 and +46. The C-SCPI type is float32. • Related Commands: INP...

Page 51 - Channel must specify a single channel; Returned Value: returns one of NORM or INV. The type is string.; aperture; For APERture to effect the measurement, SENS:FREQ:MODE must be; Usage

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 47 Parameters Comments • Channel must specify a single channel • Returned Value: returns one of NORM or INV. The type is string. • Send with VXIplug&play Function: hpe14XX_cmdString_Q(...) [SENSe:]FREQuency:APERture [SENSe:]FREQuency:APERture &l...

Page 52 - Returned Value: returns numeric aperture in seconds, The type is; allows you to; The period associated with the FREQ:LIMit:LOWer frequency is the

48 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP [SENSe:]FREQuency:APERture? [SENSe:]FREQuency:APERture? < channel > returns the currently set APERture time. Parameters Comments • If the channel specified is on an SCP that doesn’t support this function, an error will be generated. See you...

Page 53 - An unusual (but valid) use is to set the LIMit:LOWer frequency to be

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 49 exceeds the time-out period (i.e. frequency below LIMit:LOWer), then a frequency of 0 Hz will be returned to the E1415/19/22 algorithm. • Typical use for this command is to allow the user to bound the period of time that is allowed for making a f...

Page 55 - See “About Period and Frequency Measurements” on; See “About Period and Frequency Measurements” on page 16.; sets the SENSe function to; See “About Period and Frequency Measurements” on; string

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 51 SENS:FUNC:COND (@144:147) [SENSe:]FUNCtion:FREQuency [SENSe:]FUNCtion:FREQuency < ch_list > sets the SENSe function to frequency for channels in <ch_list>. Also configures the channels specified as digital inputs. See “About Period an...

Page 56 - See “Measure Pulse Width”; See “Measure Pulse Width” on page 20.

52 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP SENS:PER:MODE • *RST Condition: SENS:FUNC:COND and INP:POL NORM for all digital SCP channels • Send with VXIplug&play Function: hpe14XX_cmd(...) Usage See “About Period and Frequency Measurements” on page 16. SENS:FUNC:PER (@144) [SENSe:]FUNC...

Page 57 - The algorithm reads the current count through the low numbered; See “Sense Quadrature Position” on page 21.

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 53 Parameters Comments • <count_preset> if included, allows presetting the absolute counter associated with the channel pair. All quadrature pairs in <ch_list> will be preset to the same value. If not included, the default count at algor...

Page 58 - See “Sense Rotational Velocity” on page 22.

54 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Parameters Comments • This function can only be linked to the E1538’s first channel. The function works for wheels that have either a missing, or an extra tooth to mark their index position. Figure 14 on page 23 shows a wheel sensed with a variab...

Page 59 - See “Totalize Positive or Negative Edge; digital SCP channels.; See “Totalize Positive or Negative Edge State Changes” on page 15.

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 55 SENSe:]FUNCtion:TOTalize [SENSe:]FUNCtion:TOTalize < ch_list > sets the SENSe function to TOTalize for channels in <ch_list>. See “Totalize Positive or Negative Edge State Changes” on page 15. Parameters Comments • The totalize functi...

Page 60 - For APERture to effect the measurement, SENS:PER:MODE must be

56 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP [SENSe:]PERiod:APERture [SENSe:]PERiod:APERture < aperture >,< ch_list > sets the time allowed to determine signal period and return a reading to the algorithm. When APERture is large enough to contain more than one signal period, the...

Page 62 - An unusual (but valid) use is to set the LIMit:UPPer period to be less

58 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP the LIMit:UPPer period, then a period of 0 sec will be returned to the E1415/19/22 algorithm. (Note: A period value of 0 sec is used as a special token that must be tested for in the user’s provided E1415/19/22 algorithm.) • Typical use for this ...

Page 63 - selects the measurement

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 59 [SENSe:]PERiod:LIMit:UPPer? [SENSe:]PERiod:LIMit:UPPer? < channel > returns the upper period limit currently set for <channel> Parameters Comments • <channel> must be a single channel on an E1538A SCP. • RETURNS: .004 to 60, Typ...

Page 64 - returns the measurement; count; sets the number of

60 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP SENSe:PERiod:MODE? SENSe:PERiod:MODE? (@< channel >) returns the measurement interval mode currently set for period measurement. Parameters Comments • <channel> must be a single channel on an E1538A SCP. • RETURNS: String value "A...

Page 65 - returns the number of; RETURNS: uint32 value which is the current period count; range; Range 1.0 sec provides period measurement in the range:; 538As have a possible settings conflict:

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 61 SENSe:PERiod:NPERiods? SENSe:PERiod:NPERiods? (@< channel >) returns the number of signal periods the SCP will measure and average to calculate the signal period. Parameters Comments • <channel> must be single channel on an E1538A SCP...

Page 66 - returns the current setting; RETURNS: float32, configured upper period time range for given ch.

62 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP If SENSe:PERiod:RANGe = 1.0 then settings conflict if 1.0sec < APERture < 4.0sec. If SENSe:PERiod:RANGe = 4.0 then settings conflict if 0.01sec <= APERture < 0.04sec The E1415/19/22 driver will report these Settings Conflicts at INITi...

Page 67 - Channel must specify a single channel.; If the FM state is ON then the PULM state is OFF. If the PULM state

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 63 is triggered. • If the channels specified are not on a Frequency/Totalize SCP, an error will be generated. • Related Commands: SENS:FUNC:TOT, INPUT:POLARITY • *RST Condition: SENS:TOT:RESET:MODE INIT • Send with VXIplug&play Function: hpe14XX...

Page 70 - sets the SOURce; This PULSe channel function is further defined by the; Figure 30. For Long Pulses Use Extra Tooth Wheel

66 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP these applications. See Figure 30 . • Send with VXIplug&play Function: hpe14XX_cmd(...) Usage SENSE:FUNC:RPULSE (@108),(@114,115) reference chan is 108, pulse output on channels 114 and 115 SOURce:FUNCtion[:SHAPe]:CONDition SOURce:FUNCtion[:S...

Page 71 - See “Stepper Motor Control” on page 37.

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 67 PULM state is enabled then the pulse width modulated mode is active. If both the FM and the PULM states are disabled then the PULSe channel is in the single pulse mode. • Send with VXIplug&play Function: hpe14XX_cmd(...) SOURce:FUNCtion[:SHAP...

Page 72 - The range of position values that an algorithm can send for the; Figure 31. Relationship of

68 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP • <mode> is used to select the stepping mode. the allowable values are: Related error message:3127, "Undefined E1538 Stepper motor mode." • The range of position values that an algorithm can send for the full-speed ("SF") mo...

Page 73 - This command is coupled with the SOURce:FM command. If the FM; enable

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 69 can be directly driven by the SCP. See Figure 29 for a connection diagram that also shows the required user-supplied output protection components. • <ch_list> specifies the channels that will control stepper motors. The channels referenced ...

Page 74 - OFF

70 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP SOURce:PULM:STATe? SOURce:PULM[:STATe]? (@< channel >) returns the pulse width modulated mode state for the PULSe channel in <channel>. Parameters Comments Channel must specify a single channel. • Returned Value: returns 1 (on) or 0 (...

Page 75 - sets the fixed pulse

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 71 Usage SOUR:PULS:PER .005,(@140) set PWM pulse train to 200 Hz on channel 40 SOURce:PULSe:PERiod? SOURce:PULSe:PERiod? (@< channel >) returns the fixed pulse period value on the pulse width modulated pulse channel in <channel>. Paramet...

Page 76 - returns the fixed pulse width value; has a resolution of 1 degree. The pulse is positioned at

72 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP • Send with VXIplug&play Function: hpe14XX_cmd(...) Usage SOUR:PULS:WIDTH 2.50E-3,(@143) set fixed pulse width of 2.5 msec on channel 43 SOURce:PULSe:WIDTh? SOURce:PULSe:WIDTh? (@< ch_list >) returns the fixed pulse width value on a fre...

Page 78 - returns the setting for chan 45; degrees; preset channel 47 pulse width to

74 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP SOUR:RPULSE:VART TIME,(@143:144) algorithm will control pulse width by TIME SOUR:RPULse:VARType? SOUR:RPULse:VARType? (@< channel >) returns the type of value that will be controlled (varied) by the algorithm. Parameters Comments • <ch_l...

Page 79 - return pulse width for channel 47; seconds

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 75 260 degrees SOURce:RPULse:WIDTh[:ANGLe]? SOURce:RPULse:WIDTh[:ANGLe]? (@< channel >) returns the width of the rotational output pulse currently set for <channel>. Parameters Comments • <channel> must specify a single channel onl...

Page 81 - Specifications; General Specifications; Cross-Talk Between Channels

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 77 Specifications These specifications for the E1538A reflect its performance while installed on your VXI module. General Specifications Output Characteristics Characteristic Pull-Up Off Pull-Up On (10K to Vcc) current source (logic 1) 0 .38mA @ 1.2...

Page 82 - Period Measurement; Aperture Time

78 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Totalizer Capacity Minimum Pulse Width Frequency Range 24 bits or 16,777,215 500nS 0-100 KHz Frequency Measurement Gate Time ( t aperture ) 1 mSec to 1 Second, resolution Range to Accuracy .01% Resolution (Hz) Minimum Pulse Width 500 nS 1 f i n -...

Page 83 - Rotational Velocity Measure; Pulse Width Measure; Pulse Source

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 79 Auto-Gating (adaptive aperture) 1mSec to 1Sec for Frequency 1mSec to 1Sec for Perid (using SENS:PER:RANGE 1)4mSec to 4Sec for Perid (using SENS:PER:RANGE 4) Rotational Velocity Measure Characteristics Extra Tooth Wheel or Missing Tooth Wheel Rang...