File name : TFH44A.doc
Version 1.0
13.03.2001
VI TELEFILTER
Filter Specification
TFH 44A
1/5
1. Measurement condition
Ambient temperature
T
A
:
Input power level:
Terminating impedances at fc:
25 °C
0 dBm.
for input:
for output:
50
Ω
0 pF.
50
Ω
0 pF.
2. Characteristics
Remark:
The insertion loss
ae
is defined as the insertion loss at the nominal frequency
f
N
. Reference level for the relative attenuation
arel
of the
TFS 44A
is the insertion loss. The reference frequency
fc
is the arithmetic mean value of the upper and lower frequencies at the
3 dB
filter attenuation level
relative to the insertion loss
ae.
The temperature coefficient of frequency
Tc
f
is valid both for the centre frequency
fc
and the frequency response
of the filter in the operating temperature range.
Data
Insertion loss
(Reference level)
Nominal frequency
Centre frequency
Pass band (PB) :
Amplitude ripple in PB (p-p) :
Bandwidth
0,55
1
3
20
42
at ambient temperature:
f
N
f
C
ae
typical values
19,8 dB
tolerance / limit
max.
22
44
dB
MHz
44
MHz
f
C
... f
C
± 2,5 MHz
0,35 dB
max.
0,55
dB
dB - band width
dB - band width
dB - band width
dB - band width
dB - band width
arel
MHz
MHz
MHz
5,52
5,72
6,07
6,97
7,40
MHz
MHz
MHz
MHz
MHz
min.
min.
max.
5,0
6,0
7,67
MHz
MHz
MHz
Relative attenuation
f
N
f
N
±
f
N
±
2,50
... f
N
±
2,50 MHz ... f
N
±
3,0
3,835 MHz ... f
N
± 20
0,35 dB
<
2,7 dB
43...50
dB
2,1 µs
55
ns
2° ( r.m.s. 0,7° )
47
65
dB
dB
max.
max.
min.
max.
max.
max.
0,55 dB
3
dB
42
dB
3
µs
75
ns
3,5°
Group delay ( mean value in PB )
Group delay ripple in f
N
... f
N
± 2,1 MHz (p-p) *)
Deviation from linear phase in f
N
... f
N
± 2,1 MHz (p-p)
Triple transit attenuation compared to main signal
Crosstalk
Temperature coefficient of frequency ( Tc
f
)
Frequency deviation of f
N
over temperature :
Operating temperature range
Storage temperature range
- 75
ppm/K
∆f
c(Hz) = Tc
f
(ppm/K) x (T - T
A
) x
f
N
(MHz)
25 °C
- 25 °C ... + 85 °C
* ) measured with smoothing aperture of 78,75 kHz.
Generated:
Dunzow W.P.
Checked/Approved:
Dr. Bert Wall
VI TELEFILTER
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.com
Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
Email:
vti@vtinh.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is assumed
as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
VECTRON [ Vectron International, Inc ]
