AudioQuest M-27 specifications Printer Setup, Dsr, Extending Battery Life

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Printer Setup

Serial Printer Output

The serial printer output is RS-232-C compatible. It sends data in ASCII code at 300, 600, 1200, or 2400 Baud.

The data is sent asynchronously. The Data Set Ready line is checked before sending a character. Each character consists of 11 bits made up of a start bit, 8 ASCII character bits, and 2 stop bits. Each line is terminated by a line feed and/or carriage return characters.

Printer Switch Setup

The internal switches must be set to agree with the printer. Switch 3 controls the printer (see Internal Switch Settings). Positions 1 and 2 should normally be off.

Positions 3 and 4 are normally on (graph and text).

Positions 5 and 6 control last 2 characters/line. Many printers work if both are on. Positions 7 and 8 control baud rate.

7 on and 8 on = 300 baud

7 on and 8 off = 600 baud

7 off and 8 on = 1200 baud

7 off and 8 off = 2400 baud

Parallel Printer Setup

When set to parallel the M-27 is compatible with most Centronic compatible printers. The M-27 sets up 8 data lines, if the Busy line is not high it sends a Strobe pulse.

If the Busy line stays high for more than a few seconds, the M-27 will cancel the printout. Printer Switch Setup

See Internal Switch Settings.

Positions 1 and 2 are normally ON for parallel printers.

Positions 3 and 4 are normally ON (graph and text).

Positions 5 and 6 control the last 2 characters/line. Most printers work with both ON. Positions 7 and 8 are undefined for parallel.

Computer Connections

The M-27 can send its data to personal computers over the RS-232 port. In general, the computer and M-27 are set up similar to a serial printer. The computer is programmed to be a data terminal and the data is read into the computer. If the data is saved in an ASCII file, it may be edited with a word processor program.

Consult the Quest factory for hints on using the M-27 with specific computers.

Printer Pinouts

 

 

 

The 20-pin connector is numbered from right to left starting with 1 in the upper right corner, 2 in

the lower right corner, and 20 in the lower left corner when looking at the M-27.

 

Serial

Parallel

 

Pin 1

Data Signal

Strobe

+ 5 to +5 minus the

 

 

 

battery voltage, 300 ohm

 

 

 

impedance

Pin 3

--

Data 0 Output of HC CMOS driver

Pin 5

--

Data 1 Output of HC CMOS driver

Pin 7

--

Data 2 Output of HC CMOS driver

Pin 9

--

Data 3 Output of HC CMOS driver

Pin 11

--

Data 4 Output of HC CMOS driver

Pin 13

--

Data 5 Output of HC CMOS driver

Pin 15

--

Data 6 Output of HC CMOS driver

Pin 17

--

Data 7 Output of HC CMOS driver

Pin 20

DSR

Busy

Input > +3 volts = 1

Pins 2, 4, 6, 8,

Ground

Input < +1 volts = 0

 

10, 12

 

 

 

Pin 14

External battery minus

 

Pin 16

External battery plus

 

Pin 18, 19

No connection

 

EXTENDING BATTERY LIFE

Since the M-27 stores data even when it is turned off, the battery should be removed if it is not to be used for a few days.

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Contents Table of Contents Introduction FCC Compliance and Cautionary NoteSimplified Operating Instructions RUN Pause Reset OFFControl Keys CodeSound Level Meter Keys Procedure to Accumulate Event DataDosimeter Keys Time KeysRecording the Calibration Level Setting the ClockUsing a Printer Dumping Raw Data SpecificationsHL3 Print Changing Printer ParametersGeneral Description Weighting CharacteristicsPrinciples of Operation GeneralMicrocomputer Modes Battery Test Testing and CalibrationBattery Replacement WhereOperating Procedure As a Survey or Event Monitor As an Area MonitorUse with Windscreen EventsEffects of Operators Presence Sample Printouts Connections to PrinterPage Page Memory Location Data Memory Map03CO-1FFF Editing PrintoutDSR Printer SetupExtending Battery Life Internal Switches Switch Switch PositionsSetting Internal Switches Code Decoding Use of Lavg and TWA TroubleshootingInterpreting Results Hints and Good Practices Estimating TWA from LavgAccuracy of Readings Accessories Service Policy

M-27 specifications

AudioQuest M-27 is a standout speaker designed for audiophiles who demand high performance and exquisite sound quality. As part of AudioQuest's commitment to providing unparalleled audio experiences, the M-27 blends advanced technologies with premium materials to deliver exceptional musical clarity and accuracy.

One of the key features of the M-27 is its innovative driver design, which utilizes a new-generation ceramic cone. This cone is engineered to minimize distortion while enhancing transient response. The result is a speaker that offers a clear, detailed sound across a wide frequency range. The drivers are also matched with an advanced neodymium magnet system, ensuring efficient energy transfer and improved bass response.

The M-27 is equipped with a sophisticated crossover network that has been meticulously designed to maintain the integrity of the audio signal. By employing high-quality components, including precision resistors and capacitors, the crossover effectively divides the audio signal into specific frequency bands, allowing each driver to perform at its best. This attention to detail not only enhances sound quality but also helps to create a more cohesive listening experience.

Another notable characteristic of the M-27 is its sturdy and well-constructed cabinet. Built from high-density MDF, the cabinet is engineered to minimize resonance and vibration, which can color sound. Moreover, AudioQuest has incorporated internal bracing to further enhance structural integrity. The elegantly finished exterior not only adds to the speaker's aesthetic appeal but also serves to complement various home decors.

Connectivity is made simple with the M-27, thanks to its standard speaker terminals that accommodate a wide range of wire gauges. This flexibility allows audiophiles to use their preferred cables for optimal performance. Additionally, the speaker is designed to work seamlessly with a variety of amplifier configurations, making it an adaptable choice for different audio setups.

Incorporating these advanced technologies and design principles, the AudioQuest M-27 is not just a speaker; it's a gateway to an immersive listening experience. With its ability to reproduce sound with remarkable accuracy, it will appeal to discerning listeners looking to elevate their audio playback and enjoy their favorite music in a whole new light. Overall, the M-27 stands as a testament to AudioQuest's dedication to crafting high-quality audio products that meet the needs of serious music enthusiasts.
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