MC44BC374EJB Freescale Semiconductor, MC44BC374EJB Datasheet - Page 13

• Manufacturer Part Number: MC44BC374EJB
• Description: IC MODULATOR ANT BOOSTER 24TSSOP
• Manufacturer: Freescale Semiconductor
• Type: Modulatorr

Specifications of MC44BC374EJB

• Applications: Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11.2 Typical Performance—Noise Figure
11.3 Intermodulation ( IMD ) Measurement
Intermodulation (IMD) frequencies are all frequency combinations coming from the two input carriers F1
and F2: F2–F1, 2∗F1–F2, 2∗F2–F1 and F1+F2, fall in the 40MHz–900MHz range.
F1 and F2 input levels are set to 90dBuV at the input of the BALUN. F1 and F2 frequency generator levels
(50W internal load) take into account a 50 to 75Ohm load difference (1.8dB), plus losses in the 3dB
coupler and the 50 to 75Ohm transformer.
Intermodulation measurement is the difference (in dBc) between the F1 or F2 level at the Output (VCRTU
or TVOUT) and the frequency combinations level, for the following cases:
Intermodulation specification is the IMD measurement’s worst case.
F1
F2
F1=50MHz and F2=60MHz
F1=300MHz and F2=310MHz
F1=600MHz and F2=610MHz
11
10
9
8
7
6
5
0
Noise Figure @ Modulator OFF
90dBuV
150
Fr e que ncy (M hz )
300
Maximum specification
F1 F2
Freescale Semiconductor, Inc.
Figure 8. Intermodulation (IMD) Measurement
50/75
Figure 7. Typical Performance—Noise Figure
450
For More Information On This Product,
600
MC44BC373/374 Technical Data
Typical
MC44BC373/4
Go to: www.freescale.com
F1=100MHz and F2=110MHz
F1=400MHz and F2=410MHz
F1=700MHz and F2=710MHz
BALUN
750
900
TVOUT
VCRTU
Pin 20
Pin 17
12
11
10
9
8
7
6
75/50
75/50
0
Antenna Booster/Splitter Characteristics
Noise Figure @ M odulator ON
150
Fr e que ncy (M hz )
F1=200MHz and F2=210MHz
F1=500MHz and F2=510MHz
F1=800MHz and F2=810MHz
300
Maximum specification
Spectrum Analyzer
450
IMD (dBc)
600
Typical
750
900