Vista QP16 series Manual de usuario descargar pdf (Pagina 3)

16 Channel DVRs

www.benchmarkmagazine.com

presented. Whilst the Honeywell figure of

200ips isn’t incorrect, the specification doesn’t

mention the limitations on achieving the frame

rate. As such the unit falls into the mass of

basic DVRs with a cap of 50ips for 4CIF, 100ips

for 2CIF and 200ips for CIF. This is outside of

the base specification issued for the test, and

as such this does impact on the rating given.

One point to note is that Honeywell has

worked on the aesthetics of the HRDP16D. The

casing is black, and the lid has the Honeywell

logo pressed into it. Additionally, the fascia

includes a Honeywell logo which is illuminated

in red when the unit is powered up.

Whilst these points might seem trivial, the

reality is that they do give an impression of

quality to the end user. Given that some budget

models have basic stickers on the casing, and

sometimes obviously incorrect labelling, these

small touches are important. That said, in this

instance, we would have happily forgone the

frills for a bit more oomph!

The fascia is very much in line with a

standard DVR. There are a series of ten channel

select buttons, from 1 to 0, alongside basic

function buttons. There is also a four-way

button pad for menu navigation, which doubles

up as controls for playback control.

The HRDP16D is supplied with a full manual.

It’s comprehensive, but much of the

functionality is straightforward. The unit is also

supplied with an infrared remote control unit.

The menu structure is easy to use. Recording

configurations can be set on an individual

basis, with two screens – cameras 1 to 8, and 9-

16. General settings are simple, as is motion

detection and alarm handling. Search is also

easy to use.

The video settings allow resolution to be set

as 704 x 576 pixels, 704 x 288 pixels or 352 x

288 pixels; the only thing to watch is the

multiplication of frame rates, which occurs as

differing resolutions can be applied to

individual inputs. CIF images are displayed as

full screen, so there is slightly more pixilation.

There are four quality settings; Low, Normal,

High and Highest. With 4CIF recording, the High

and Highest settings deliver a clean image.

There are a few signs of compression,

dependent upon the viewed scene, but nothing

detrimental to the usability of the image. In

Normal mode, compression is more obvious,

but there isn’t a level of degradation that will

cause an issue. The Low setting show obvious

compression artefacting.

With CIF resolution, the image quality

deteriorates, and unless you are using High or

Highest the images are very obviously

compressed and only good enough for general

surveillance.

Mitsubishi DX-TL5716E

The Mitsubishi DX-TL5716E supports up to 16

video inputs with loop-throughs, with a variety

of video outputs. These are main monitor, and

spot monitor via BNC, as well as XGA and S-

Video outputs.

Other connections include 2 audio inputs

with 1 output, 16 alarm inputs, 16 relay outputs,

RS-485 and RS-232 data connections, a LAN

(10/100) port and 4 USB connections (two on

the front panel beneath a cover, and two on the

rear). A DVD rewriter is also included.

Other less usual options include a BNC input

and output for cascading multiple units, and a

selection of connections for tasks such as clock

synchronisation, event inputs, emergency

inputs, etc.. They could be useful, although

most machines will allow similar configurations

via basic alarm inputs.

Recorded video uses MPEG-4 compression

and resolutions can be set as 704 x 576 (4CIF),

704 x 288 (2CIF) or 352 x 288 (CIF). Record rate

is 400ips for CIF resolution, 200ips for 2CIF and

100ips for 4CIF.

The DX-TL comes from a generation of DVRs

where housings were heavy and robust. As

such, it’s a serious lump. The fascia is fairly

clean, with an array of indicator LEDs, a

jog/shuttle dial beneath which resides general

operational buttons, and channel select

options. Playback controls, set-up options and

the front mounted USB and video-out ports

(phono) are concealed beneath a flap.

The menu structure for the unit is pretty

straightforward, although you do get the

feeling that the unit could benefit from a rework

on the GUI. Setting features such as motion

detection and alarm handling is simple.

The video settings allow a choice of 4CIF, 2CIF

and CIF. There are also nine quality settings. At

Level 9 in 4CIF resolution, images are clear and

Mitsubishi DX-TL5716E

A no-frills dependable DVR

Starting to feel slightly out-dated

Samsung SRD1670DP

A genuine real-time DVR at all resolutions

A few more global options in the menus might be nice

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