S8740190 datasheet(2/4 Pages) PDI

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Product Specification

S8740190

Si Push Pull, 40 – 870MHz, 18.5dB min. Gain @ 870MHz, 240mA max. @ 24VDC

Page 2 of 4

2004 Jun 01

Document Revision Level C

Notes:

The slope is defined as the difference between the ´ideal gain´ at the start frequency and the ´ideal gain´ at the

stop frequency.

The gain flatness is the deviation of any amplitude value from the ideal gain curve calculated by the following

mathematical model: Gain = G + C*SQRT(fx/f1).

G = constant gain (frequency independent); C = cable constant; fx = desired frequency; f1 = start frequency. The

cable constant C must be optimized during the flatness determination so that the curve best fits the measured

gain figures. The start value for C is calculated using the formula Cstart = (Gn–G1)/(SQRT(fn/f1)-1), where Gn = the

measured gain at the stop frequency, G1 = the measured gain at the start frequency and fn = stop frequency.

The value of G is chosen so that the max. positive deviation of the measured gain from the ´ideal gain´ curve is

the same as the max. negative deviation. The value of C is adapted by ± 0.001 until the ´ideal gain´ curve best

fits the measured curve. The flatness of the module gain is the maximum deviation in measured gain from the

optimized gain formula.

CHARACTERISTICS

Table 2: Distortion data; VB = 24V; Tmb = 30°C; ZS = ZL = 75 Ω

SYMBOL

PARAMETER

CONDITION

MIN.

TYP.

MAX.

UNIT

CTB

composite triple beat

79 ch. flat; Vo = 44 dBmV

112 ch. flat; Vo = 44 dBmV

132 ch. flat; Vo = 42 dBmV

-65.0

-56.0

-61.0

-54.0

- 53.0

dBc

XMOD

cross modulation

79 ch. flat; Vo = 44 dBmV

112 ch. flat; Vo = 44 dBmV

132 ch. flat; Vo = 42 dBmV

-62.0

-59.0

-61.0

-60.0

-57.0

- 59.0

dBc

CSO

composite second order

distortion

79 ch. flat; Vo = 44 dBmV

112 ch. flat; Vo = 44 dBmV

132 ch. flat; Vo = 42 dBmV

-65.0

-62.0

-59.0

- 58.0

dBc

second order distortion

-72.0

-65.0

-70.0

dBc

output voltage

dim = -60 dB

62.0

59.0

dBmV

Notes:

79 channels, NTSC frequency raster: 55.25 MHz to 547.25 MHz, +44 dBmV flat output level.

112 channels, NTSC frequency raster: 55.25 MHz to 745.25 MHz, +44 dBmV flat output level.

132 channels, NTSC frequency raster: 55.25 MHz to 865.25 MHz, +42 dBmV flat output level.

f1 = 55.25 MHz; V1 = 44 dBmV; f2 = 493.25 MHz; V2 = 44 dBmV; fTEST = f1 + f2 = 548.5 MHz.

f1 = 55.25 MHz; V1 = 44 dBmV; f2 = 691.25 MHz; V2 = 44 dBmV; fTEST = f1 + f2 = 746.5 MHz.

f1 = 55.25 MHz; V1 = 44 dBmV; f2 = 805.25 MHz; V2 = 44 dBmV; fTEST = f1 + f2 = 860.5 MHz.

f1 = 540.25 MHz; V1 = Vo; f2 = 547.25 MHz; V2 = Vo – 6 dB; f3 = 549.25 MHz; V3 = Vo – 6 dB;

fTEST = f1 + f2 - f3 = 538.25 MHz, according to DIN45004B.

f1 = 740.25 MHz; V1 = Vo; f2 = 747.25 MHz; V2 = Vo – 6 dB; f3 = 749.25 MHz; V3 = Vo – 6 dB;

fTEST = f1 + f2 - f3 = 738.25 MHz, according to DIN45004B.

f1 = 851.25 MHz; V1 = Vo; f2 = 858.25 MHz; V2 = Vo – 6 dB; f3 = 860.25 MHz; V3 = Vo – 6 dB;

fTEST = f1 + f2 - f3 = 849.25 MHz, according to DIN45004B.

Composite Second Order (CSO)

The CSO parameter (both sum and difference products) is defined by the NCTA.

Composite Triple Beat (CTB)

The CTB parameter is defined by the NCTA.

Cross Modulation (XMOD)

Cross modulation (XMOD) is measured at baseband (selective voltmeter method), referenced to 100% modulation of the

carrier being tested.

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