Comparing 303MMf 303III and 305III , 305N

DataMan

Hey

was looking at the new products by Haicom
Comparing the 303III and 305III and 305N

there things that doesnt make sense to me I would like some professional help on it please..

looking at the spefications of

303III

Interfaces: Compact Flash type I & Mini-1394

Protocol:
NMEA0183 GGA, GSA, GSV, RMC, GLL

Baud Rate: 4800, N, 8, 1

Max. Update Rate:
1 Hz

Datum:
WGS84

Channel:
20 channel

Frequency:
L1, 1575.42MHz

Hot Start:
8 sec. Average

Warm Start:
38 sec. Average

Cold Start:
48 sec. Average

Reacquisition Time:
100 ms

Position Accuracy:
15m 2D RMS, SA off

Maximum Altitude:
18,000m

Maximum Velocity:
515m/s

Voltage:
DC 3.3V+- 10%

Power consumption:
90mA continuous mode

Antenna Type:
Built-in active antenna

External Antenna Connector:
MMCX (Optional)

Dimension:

Fold: 68 (L) x 48 (W) x 24 (H)mm

Unfold: 120 (L) x 48 (W) x 21 (H)mm

LED Indicator:
3D Positioning (blinking) or
Searching GPS (on)

Operating Temperature:
-10° to + 70°

Storage Temperature:
- 40° to + 85°

Operation Humidity:
95%, Non- Condensing

Sensetility:
-159dBm

-------------------------

305III

Interfaces: Compact Flash type 1 & Mini-1394

Protocol:
NMEA0183 GGA, GSA, GSV, RMC

Baud Rate: 4800, N, 8, 1

Max. Update Rate:
1 Hz

Datum:
WGS84

Channel:
20 channel

Frequency:
L1, 1575.42MHz

Hot Start:
3 ~ 6 sec. Average

Warm Start:
34 sec. Average

Cold Start:
46 sec. Average

Reacquisition Time:
100 ms

Position Accuracy:
7m 2D RMS, SA off

Maximum Altitude:
10,000m

Maximum Velocity:
600m/s

Voltage:
DC 3.3V+- 10%

Power consumption:
90mA continuous mode

Antenna Type:
Built-in active antenna

External Antenna Connector:
MMCX (Optional)

Dimension:

Fold: 65 (L) x 48 (W) x 25 (H)mm

Unfold: 116 (L) x 48 (W) x 22 (H)mm

LED Indicator:
3D Positioning (blinking) or Searching GPS (on)

Operating Temperature:
-40° to + 80°

Storage Temperature:
- 55° to + 85°

Operation Humidity:
95%, Non- Condensing

Sensetility:
Acquisition: -149 dbm
Tracking: -159 dbm
-------------------------------------

Well physically 305 series looks that it got a bit smaller like 4 mm.

But what I dont get is..
They are both using Sirf III so why there is a difference in the following?

Warm Start
Cold start
Position Accuracy (almost by half) 14 vs. 7m
Maximum Altitude
Maximum Velocity
Sensetility

Can any one explain this please?

Also how are these compared to the 305N (beside the low consomption.) Im talking about the quality of operation.

one more thing...

How many satelites are in view from each side of the world... soes it really make any difference to have 12 or 16 or 20 simultaneous satelite tracking ability?

Thanks for education me in advance... Idea

**Info from http://www.haicom.com.tw/hi_305III.shtml
and http://www.haicom.com.tw/hi_303III.shtml
_________________
Tomtom Nav 6.0 USA, Canada & Europe Map
Ipaq 5455 PPC2003
Haicom 305III BT

nulusios · Posted: Thu Aug 04, 2005 10:01 pm Post subject:

I can answer all those.

The dimensions are identical. The thing with Haicom is that they don't give much attention to their site. I know, I've talked with them about it.

Much of the site is made from various cuts and pastes (from manual docs, original vendor specs etc.), this is why you see discrepancies.

As for the 20 sats, indeed I doubt 20 can be seen from normal sea attitude (even with no obstacles in any direction). BUT the higher you get, the more you can see (up to a limit... surely you cannot see more than ~2/3 at any attitude). Probably 20 is just to demonstrate the "more than enough" and maybe to compensate for the FUTURE GPS compatible european sats (when the GPS network will be more dense).
_________________
NLS

DataMan · Posted: Thu Aug 04, 2005 10:15 pm Post subject:

So should i consider upgrading from 303 MMF to 303 III?
or anyother version...

I want the best preformance
_________________
Tomtom Nav 6.0 USA, Canada & Europe Map
Ipaq 5455 PPC2003
Haicom 305III BT

nulusios · Posted: Thu Aug 04, 2005 10:23 pm Post subject:

you answer yourself - if you want the best performance you should get the latest (and best) chipset out there
_________________
NLS

DataMan · Posted: Thu Aug 04, 2005 10:27 pm Post subject:

:D wish I knew which one is the best!!
_________________
Tomtom Nav 6.0 USA, Canada & Europe Map
Ipaq 5455 PPC2003
Haicom 305III BT

nulusios · Posted: Thu Aug 04, 2005 10:33 pm Post subject:

You think the older would be better?

I think I was pretty clear.
_________________
NLS

DataMan · Posted: Thu Aug 04, 2005 11:02 pm Post subject:

We have 2 new one
nemrix and SirfIII

Is it worth it ... would I see the difference

to upgrade from 303MMF to any other?
_________________
Tomtom Nav 6.0 USA, Canada & Europe Map
Ipaq 5455 PPC2003
Haicom 305III BT

nulusios · Posted: Thu Aug 04, 2005 11:40 pm Post subject:

I don't think 303 comes in Nemerix taste.

If you are going to 305 (adding also the SD slot), then maybe it's worth it. I would say (infact say in my review) that Nemerix (currently with the new firmware) IS a bit better than SiRF II/LP. Not better than SiRF III though.

But if power consumption is important (and if you use one more SD it is - this is why they gave the Nemerix option only for 305), then Nemerix is unbeatable.
_________________
NLS

nulusios · Posted: Tue Feb 21, 2006 2:54 pm Post subject:

well they say Nemerix can be up to 1/10 of the others' power consumption - I'd say 1/3

yes both SD will be accessible
_________________
NLS

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