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 EM Digital Voice Recorder lcd series - Model lcd b8
Digital Voice Recorder LCD series for comfortable high quality record of voice messages
EM Digital Voice Recorders LCD is a new series of digital voice recorders (DVR).Voice recorders of the EM Digital Voice Recorders LCD series are professional devices intended for making high quality record of voice messages into the built-in flash memory. You can playback recorded messages using the earphone and save them into your PC as standard sound files.
Voice recorders are of extremely small size and weight, have a long record duration (varies with the model - up to 600 hours) and autonomy operation (up to 1000 hours), a wide dynamic range and a highly sensitive built-in microphone. Having no moving parts, the DVR is able to function within a wide range of temperatures, under strong vibration and dustiness.
For the user's convenience while operating the DVR, there is a push-button manipulator (joystick) and a liquid-crystal display to indicate all the information needed, including a built-in clock / a real-time timer.
Having small size traditionally, the model features the following:
- three-line LCD indicator;
- joystick to control the DVR;
- dynamic range, extended by 8 times (16 bit codec, and 18 bit when using an external microphone);
- signal/noise ratio improved by 12 dB;
- extended recording frequency band (100-6000 Hz), sample rate selection 4/8/16 kHz;
- lower current consumption: half in Recording mode, 5 times lower in Standby mode and 20 times lower in VAS;
- faster data exchange with the PC through the supplied USB adapter;
- timer for automatic scheduled recording;
- antialiasing program median filter available to improve recorded and played signal quality;
- firmware upgraded by the user;
- new, more functional software for PC.
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ART. CODe: b8
DVR operation features:
- The DVR records either in the sequential messages mode (one by one, the number of messages is limited only by the DVR memory) or in the cycle buffer mode (i.e. cyclically). The DVR can provide some memory size to the cycle buffer. As soon as the provided memory space comes to the end, the DVR will start recording into the record beginning (i.e. deleting the previously recorded data). Therefore, the cycle mode is convenient if you want to have fresh information for a certain period.
- The DVR has a Voice Activating System (VAS) which effectively compresses pauses in messages, therefore increasing the actual record duration. Activating VAS allows the user to save memory in pauses; but the data about time intervals is stored (and can be restored at further file processing with the software supplied). You may use your DVR for message recording, as well as a flash-disc at the same time, to store and transfer data of any format.
Available Models:
- EM Digital Voice Recorder LCD B8-19h
- EM Digital Voice Recorder LCD B8-37h (2240)
- EM Digital Voice Recorder LCD B8-75h (4480)
- EM Digital Voice Recorder LCD B8-150h (8960)
- EM Digital Voice Recorder LCD B8-300h (17920)
- EM Digital Voice Recorder LCD B8-600h (35840)
- EM Digital Voice Recorder LCD B8-1200h (71680)
- EM Digital Voice Recorder LCD B8-2400h (143360)
| Product Features |
| Battery life in record mode, hours
|
250 |
| Battery life in stand-by mode |
17520 |
| Built-in FLASH memory size, MB |
128, 256, 512, 1024 |
| Case |
Plastic |
| Dimensions, mm |
59x28x9 |
| Power source |
Battery CR2450 |
| Voice storage capacity, min |
1120, 2240, 4480, 8960 |
| Weight, grams |
20 |
| Voice storage capacity, hours |
18.7, 37.3, 74.7, 149.3 |
| Continuous operation duration in record mode |
up to 250 hours |
| Continuous operation duration in playback mode |
up to 50 hours |
| Continuous operation duration in standby mode |
2 years |
| Continuous operation duration in VAS standby mode |
2500 hours |
B8 model of DVR uses accessories of type 3. EM Digital Voice Recorders LCD DVR has several rates of voice compression which enables the user to make records of different quality and to compromise the record quality and duration. The DVR provides for eight user settings for record parameters (profiles).
DVR Record Quality |
| 0 |
Extra high |
sample rate 16 kHz, linear (without compression), 256 Kbit/s |
k=16 |
| 1 |
Super high |
sample rate 16 kHz, logarithmic compression (16 LOG), 128 Kbit/s |
k=8 |
| 2 |
Normal |
sample rate 8 kHz, logarithmic compression (16 LOG), 64 Kbit/s |
k=4 |
| 3 |
Medium |
sample rate 8 kHz, modified 4-bit ADPCM, 32 Kbit/s |
k=2 |
| 4 |
Extra high VAS |
sample rate 16 kHz, linear (without compression), VAS, 256 Kbit/ |
k=16* |
| 5 |
Super high VAS |
sample rate 16 kHz, logarithmic compression (16 LOG), VAS, 128 Kbit/s |
k=8* |
| 6 |
Normal VAS |
sample rate 8 kHz, logarithmic compression (16 LOG), VAS, 64 Kbit/s |
k=4* |
| 7 |
Medium VAS |
sample rate 16 kHz, modified 4-bit ADPCM, VAS, 32 Kbit/s |
k=2* |
Software :
The supplied USB adapter provides high-speed data exchange between the DVR and PC (1.5 Mb). The software supplied on the CD makes it possible to save the recorded messages as standard sound files, to set the DVR parameters and to control admission to the DVR functions. Besides, with the software you may set admission levels to the DVR functions from joystick. The admission levels prevent data (or DVR settings) damage by unauthorized people. The software features a user-friendly interface; no special skills are required to connect the DVR.
Glossary:
Antialiasing filter
A low-frequency filter, which is connected before the analog input of the analog-to-digital converter. It is necessary to prevent possible distortions related to spectrum aliasing during the AD converting.
Dynamic range
The difference between levels of the loudest and quietest sounds, evaluated in decibels.
Signal/noise ratio
Determines the signal intensity relative to the background noise of data transfer channel, evaluated in decibels.
Sample rate
The rate of sampling at converting the analog signal into digital. It is evaluated in the number of samples per second or in hertz. For example, the sample rate of the CD system is 44.1kHz. The lower the sample rate value, the poorer the quality of the digital record, but smaller the record file size.
Technical Parameters |
| Recording time in ExtraLongPlay mode (modified
2-bit ADPCM, sample rate 8 kHz, 16 Kb\s) |
1120-17920 min (flash memory 128-2048 MB) |
| Supply voltage |
2,7V ~ 3,2V |
| Operation temperature |
- 20°C ~ +50 °C |
| Maximal audio band: |
| At play back from PC |
100 Hz ~ 6000 Hz |
| At play back via earphone |
100 Hz ~ 3800 Hz |
| Audio sample rate |
16000, 8000, 4000 Hz |
| Codec resolution |
16 digits (using external microphone the dynamic
range is 18 digits) |
| Signal to Noise Ratio |
72 dB |
| Quality, format and data recording density |
- in record mode: up to 250 hours
- in playback mode: up to 50 hours
- in standby mode: 2 years
- in VAS standby mode: 2500 hour
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| Data transfer rate via USB-interface |
Up to 1,5 Mb\s |
| Current consumption: |
| Stand-by mode (with LCD on) |
0,14 mA |
| Stand-by mode (with LCD off) |
0,014 mA |
| Record mode (depending on the recording profile) |
1,5 mA - 3,6 mA |
VAS mode, audio level is lower than the
threshold value |
Less than 0.2 mA |
| Built-in microphone sensitivity |
7-9 m |
Software features and settings :
- VAS presence with tuning parameters
- Antialiasing median program filter
- Linear and circular recording mode
- 8 user profiles
- Random record erasing
- Built-in real time clock
- Timer for scheduled recording
- Battery charge indication
Delivery set:
- EM Digital Voice Recorders LCD digital voice recorder
- Earphone
- USB adapter
- CD with software
- 2 batteries
- Operation manual
- Package
Buy or Ask Informations about this product:
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