| Q1: |
What’s the
difference among 7H.7S.5W.5R Series? |
| A1: |
|
Case name |
Tuning
Pole |
Case
size
H
x W (mm) |
Terminator |
Freq.
Region |
Input
power |
|
7H series |
2-5 Pole |
12.5 x
7.6 |
Pin type |
42~1500MHz |
>1
watts |
| 7S series |
2-4 Pole |
7.7 x 7.6 |
Pin type |
196~1500MHz |
>1
watts |
| 5W series |
2-4 Pole |
8.6 x 5.6 |
Pin type |
230~2600MHz |
>1
watts |
| 5R series |
2-4 Pole |
8.6 x 5.6 |
Pin type |
230~1650MHz |
>1
watts |
|
|
|
| Q2: |
What’s the
difference among 7H2.7H3.7H4.7H5 ? |
| A2: |
| Differences
\ Item |
7H2
(TD) |
7H3
(TT) |
7H4
(TF) |
7H5
(TV) |
| In
the Dimension |
Double-tuned |
Triple-tuned |
Quadruple-tuned |
Quintuple-tuned |
| In
the Performance |
Each
Series adding one pole itself will increase attenuation and offer
much better
performance.
Also, it’ll increase Insertion Loss 10~30% from the original
one. |
|
|
|
| Q3: |
How to choose a
Part Number from Temwell Standard Product List? |
| A3: |
Please
follow the below steps:
1.Decide
Center Frequency you need, searching it from ‘’Acceptable Specify Fo
Range’’ (designed by
Temwell), then you can minimize the area and focus on some specific
Parts Numbers.
2.Select
the close Spec which could fit your Bandwidth, Insertion loss and
Attenuation need.
3.Click
onto each Part Number in the data-sheet, see the Performance curve and
detail Spec.
4.Find
out the best Performance Curve that close your request in each
Data-sheet.
5.Choosing
the Part Number that have the closest spec to you.
6.If
the Sample Fo of your selective Part Number doesn’t completely meet
your requests, please ask us
to make the custom item as your need, providing us Center Fo, BW, IL, etc in
the same time. |
|
|
| Q4: |
What do you mean by ‘’Acceptable Specify
Fo Range’’ showing on each Spec.? |
| A4: |
That means we can make the same performance
curve shift as the Frequency range that we set in the acceptable specify
Fo Range. For example, Part Number:TT6755D-145M, Acceptable Specify Fo
Range:125~145 MHz, customer need Fo=127 MHz, It’s because Fo=127M
during the range 125~145Mhz so that the specification and performance
curve of TT6755D can be tuned by Temwell to 127MHz as good as the
original Fo. The Part No. would be transferred to TT6755D-127M . |
|
|
| Q5: |
What do you mean by ‘’Tunable
Range’’ showing on each spec., can I tune by myself? |
| A5: |
1.Tunable
Range +/-10 MHz means you can tune by yourself, in this case,
performance will not move
so much, however, only when you need to make some necessary modification
to adjust your equipment,
please noted you should have instrument such as network analyzer, then
tuning the Fo about +/-10 MHz
is acceptable. (※Please noted we are not responsible for the tuning
damage caused by customer)
2.7H4
Series (TF) and 7H5(TV) are not allowed to tune by customers
themselves. |
|
|
| Q6: |
In
what situation should I do some ‘’Tuning’’ by myself? |
| A6: |
In
some particular cases, it is very important to tune by yourself. If
match circuit don’t complete (in or out ),
with
RF Circuit. So that Fo (Center Freq.) would be moved in a several MHz
from Fo. At this moment, you
can
tune the screw very carefully , let Fo return to original Fo that you
design at the beginning.
|
|
|
| Q7: |
What
do you mean by ‘’Bandwidth’’? |
| A7: |
The
width of the pass band of a Band Pass Filter is the frequency difference
between lower and upper
3
dB points, Generally ,show at –3db,sometimes,at –1db it described
the same spec of curve at different
mark
point . |
|
|
| Q8: |
What should I note if I will adjust the
screw by myself? |
| A8: |
When you want to tune the screw. Each screw
moves the same distance and see the Band Pass figures by NA. If someone
is overturning and lose the function, please be responsible for the
unworking BandPass Filter. |
|
|
| Q9: |
Low pass, high pass, and band pass? |
| A9: |
Low
pass and high pass are not available. We only provide BAND PASS FILTER,
which means a filter that
passes
one band of frequency and rejects both higher and lower frequencies. |
|
|
| Q10: |
How many types of pin position for
options? |
| A10: |
There
are total 6 types in each Temwell Product Series such as A. B. C.
D. E. F. The detail Pin Position
Diagram
as the following connect. TEMWELL
PIN POSITION DIAGRAM |
|
|
| Q11: |
Where is the different between RF
Connector Filter and RF Band Pass Filter? |
| A11: |
It's
different between RF Connector filter and RF Helical Band Pass Filter because the
RF Connector filter have combined
the RF Helical Filter(7H3 and 5W3 Pin Type Series) with the PC board with the
connector,
including SMA,F,N,
and
we have already adjusted the efficiency. If you are not sure to use the
Helical
Filter into the
PC board ,we would recommend you purchasing the RF Connector filter
,which can be
used by locking
the connector .
|
|
|
| Q12: |
What ‘s the difference between
Saw Filter and Helical Band Pass Filter? |
| A12: |
| |
Helical
BP Filter |
Saw
Filter |
| Center
Frequency (Fo.) |
Fo
= 44~2600MHz
(Accept
Customized Fo.)
|
Fo
= Fixed
Freq. only
(Each
Freq. needs a New mask)
|
| Band
Width (B.W.) |
B.W.=
2~250MHz
(Accept
Customized BW) |
B.W.=0.1MHz UP Only
(Fixed
B.W.) |
| Initial
Charge |
USD120~200
per item |
Thousands USD
per mask |
| Insertion
Loss |
IL=1.0
~ 8.0 dB
PS.
The more BW, the less IL
about
0.5 dB
(If
your match circuit is great,
the I.L. would be <1.0dB Loss.)
|
IL=3
~ 30 dB
PS.
The more BW, the more IL
about
>10~20 dB
|
| Impedance |
50
Ohms / 75 Ohms |
500
~ 2K Ohms |
|
Delivery
day |
Sample |
7~10
Work Days |
60~90
Days |
| Mass
Prod |
35~45
Work Days |
60~90
Days |
| Q'ty
Limited |
Min.
order
10
PCS
|
Mini-order
Several
Thousands of PCS
|
| In-put
Power |
1~4
Watts
(depend
on frequency) |
<0.2
Watts
|
| Case
Type |
Pin
Type
7H/
7S/ 5W/ 5R/ |
SMD
Type
|
|
|
|
| Q13: |
How to make calibration? |
| A13: |
(1)Diagram for NA ( Network Analyzer) |
|
 |
|
(2)Match to 50Ω diagram |
|
 |
|
|
| Q14: |
How to Tuning to your Fo? |
| A14: |
The
Tuning Steps:
1.Preparing
the PCB + SMA Connector as Test Fixture.
2.Processing
the Calibration test as attached drawing.
3.Turning
the both right & left screw with the same direction, distance &
time. The curve will shift the
center Fo from the one to the other you want.
|
For
example:
you can drive both right & left screw to the left side
each 0.5mm simultaneous, until you saw
the NA reached at 895MHz.
When the performance S11 & S22 is
the best & Return Loss is
the biggest.
A perfect performance is finished. (N/A: Network
Analyzer)
|
 |
|
