Swires Terry meter
 

Morning All,

I'm in the market for a simple meter. I've been looking at a Swires Terry
http://www.swires.com/ which seems to do the job.

Any thoughts?

I've seen a mini review from John Rumm from May last year and wondered if
anyone had an update since then?

Cheers
D.

Swires Terry meter
 

On Jun 8, 10:23*am, "Doctor D" wrote:
Morning All,

I'm in the market for a simple meter. I've been looking at a Swires Terryhttp://www.swires.com/which seems to do the job.

Any thoughts?

I've seen a mini review from John Rumm from May last year and wondered if
anyone had an update since then?

Cheers
D.

Idle thought - is the column of figures at the right hand end of the
'Terry' display the SNR? If so why are channels 29 & 34 showing 'M'
and 'F' when they meet the criteria for 'P' ?

Swires Terry meter
 

wrote:
On Jun 8, 10:23 am, "Doctor D" wrote:
Morning All,

I'm in the market for a simple meter. I've been looking at a Swires Terryhttp://www.swires.com/which seems to do the job.

Any thoughts?

I've seen a mini review from John Rumm from May last year and wondered if
anyone had an update since then?

Cheers
D.

Idle thought - is the column of figures at the right hand end of the
'Terry' display the SNR? If so why are channels 29 & 34 showing 'M'
and 'F' when they meet the criteria for 'P' ?

No, its the signal strength in dBuV. Hence you can get cases where there
is a strong but poor quality signal and it only be awarded a M or even a F.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

Swires Terry meter
 

On 8 June, 18:03, John Rumm wrote:
wrote:
On Jun 8, 10:23 am, "Doctor D" wrote:
Morning All,

I'm in the market for a simple meter. I've been looking at a Swires Terryhttp://www.swires.com/whichseems to do the job.

Any thoughts?

I've seen a mini review from John Rumm from May last year and wondered if
anyone had an update since then?

Cheers
D.

Idle thought - is the column of figures at the right hand end of the
'Terry' display the SNR? If so why are channels 29 & 34 showing 'M'
and 'F' when they meet the criteria for 'P' ?

No, its the signal strength in dBuV. Hence you can get cases where there
is a strong but poor quality signal and it only be awarded a M or even a F.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

Ah right cheers, that little mystery explained :-)

Swires Terry meter
 

wrote:


Ah right cheers, that little mystery explained :-)

There is a bit of explanation he

http://www.swires.com/pdf/Terry2DS.pdf

A Pass rating suggests a SNR better than 26dB, 21-25 is marginal and
less than 21 a fail. Having said that, I am not sure where in the
decoding process it measures the SNR - before or after taking into
account any inherent FEC present in the CODEC.

In general it gives accurate if slightly pessimistic results - many
modern digiboxes will perform well even on what it considers a marginal
signal. However this may well be by intention to encourage design of
systems that include enough headroom to allow for natural variation and
some degradation with age.

Basically if you are doing anything other than bog standard easy
installs, it makes the difference between actual design and pure
guesswork! Well pleased with mine.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

Swires Terry meter
 

"John Rumm" wrote in message
o.uk...
wrote:
In general it gives accurate if slightly pessimistic results - many modern
digiboxes will perform well even on what it considers a marginal signal.
However this may well be by intention to encourage design of systems that
include enough headroom to allow for natural variation and some
degradation with age.

This leads to an important problem with communal satellite system
installations. On large systems with a lot of amplification the s/n ratio is
often degraded between dish and outlet. Nevertheless when the installer
checks with his analyser he finds that all muxes are a good pass.Then J.
Bloggs moves in with his Sky box, which can be anything of course in terms
of age and type. One or two of his favourite channels are missing. The
analyser says everything's OK and a substitute receiver works fine. However,
his point is that his receiver worked OK at his previous address. Impass!

Bill