Long pre-alarm recording. Mitsubishi DX-TL4509E(Z), DX-TL4509E series

Long pre-alarm recording

Long pre-alarm recording is a function to perform pre-alarm recording for a maximum of 60 minutes before the emergency recording is started.

To set LPA area, set the desired capacity in “Long Pre-

Alarm Area” ( page 77 “Change Partition Setting”).

When the long pre-alarm recording is started during normal recording, not all the camera numbers set for long pre-alarm recording may be used for recording.

To perform the long pre-alarm recording by all the camera numbers set for emergency recording: i) To perform with normal recording:

Set all the desired cameras to normal recording setting. Long pre-alarm recording is performed at the picture grade of “L6-34KB” regardless of the setting and at the recording rate set for normal recording.

ii) To perform with normal and alarm recordings:

Set the “Alarm Mode” to “Alarm Plus.”

(Normal recording) Set all the desired cameras to normal recording setting. Long pre-alarm recording is performed at the picture grade of “L6-34KB” regardless of the setting and at the recording rate set for normal recording.

(Alarm recording) During alarm recording, long prealarm recording is performed at the picture grade of

“L6-34KB” regardless of the setting. And for only the cameras used for alarm recording, long pre-alarm recording is performed at the alarm recording rate.

iii) To perform with alarm recording:

Set the “Alarm Mode” to “Alarm Plus.”

Long pre-alarm recording is performed at the picture grade of “L6-34KB” regardless of the setting and at the recording rate set for alarm recording.

Long pre-alarm recording is executed with the recording rate of the normal or alarm recording set for that time period and with the picture grade of “L6-34KB.”

Cautionary notes for long pre-alarm recording

• When long pre-alarm recording time is set, the unit records the data in LPA area at all times. Set the recording rate and picture grade carefully when long prealarm recording is performed simultaneously with normal or alarm recording. Depending on the setting, picture may be missed during recording. Particularly, in case of recording for serial bus HDD, set the recording rate not to exceed 100 pps.

• The recording for LPA area is carried out for the longer time than the specifi ed because the data in the LPA area is processed in 512 MB unit.

• In the LPA area, alarm list or recording data may not be stored in the chronological sequence. The easier way to search the desired data is, before searching the data, search the oldest recording data using <Search by Time and Date>.

• In the LPA area, all the existed recording data is deleted and overwritten when the capacity becomes full. It is recommended to make copy of the important data to the other medium using the function such as copy 2.

To start copy from the oldest data, set the copy start time to the start time of recording which can be checked in

<Search by Time and Date>. Copy is carried out from the the oldest data.

• In the LPA area, data is recorded at all times and when the emergency is input, the data is locked to prevent overwriting.

For example, when the data A1 to A3 and B1 to B3 are recorded in the first and second rounds of recording respectively, the chronological sequence of the recording data is: A1 A2 A3 B1 B2 B3.

However, storing order of the data on HDD is: B1 A1

A2 B2 A3 B3, and the data is played back or listed in alarm list in that order.

Recording end point

Recording start

point of HDD

B1

A1

A2

: Recording data of the first round

B2

A3

B3

: Recording data of the second round

Audio Recording Setup

This item is used to set the audio recording. This unit simultaneously records audio along with the picture for camera number 1. When recording audio, HDD space is used faster than when only picture is recorded.

Setup Menu

1 Recording

6 Audio Recording Setup step

1. Set the audio recording mode.

recording (normal, alarm, or emergency recording).

or emergency recording.

To record audio, the camera number 1 must be set to record. The camera number 1 corresponds to AUDIO IN 1 terminal.

When the recording mode changes from normal recording to alarm recording, or from alarm recording to normal recording, audio may be cut off temporarily. This is normal and not a malfunction.

When alarm area is set in the main device and “Audio

Recording Mode” is set to “Alarm,” the audio is recorded in the alarm area with the picture. ( page 77)

To copy the recorded audio as the digital data, copy the picture of camera number 1.

You can hear live audio any time except during playback.

The live audio switches to playback audio when you start playback or triplex playback.

Operations

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