SL2150LH2S ZARLINK [Zarlink Semiconductor Inc], SL2150LH2S Datasheet - Page 15

• Manufacturer Part Number: SL2150LH2S
• Description: Front End Power Splitter with AGC
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

SEMICMF.019
Data Sheet
To minimize crossmodulation in the test set up the output channel is filtered through a narrow band filter and then
amplified to compensate for insertion loss. The amplifier output is then demodulated on a first spectrum analyzer
set to linear mode with maximum resolution and video bandwidth. The video out of the first spectrum analyzer,
which will be the demodulated AM on the carrier, is connected to a second spectrum analyzer centred on line rate
frequency with video averaging enabled. The cross modulation can then be monitored on the second spectrum
analyzer.
The CXM is measured with modulation disabled on N+-1 since these channels were found to produce
crossmodulation in the filter and the post amplifier.
Under gain reduction the amplitude is normalized to channel 2 output at the required AGC onset.
4.6.4
Gain is measured using a network analyzer with 50/75 Ω pads to ensure correct source and load impedance.
4.6.5
Output amplitude at a given channel is measured on a spectrum analyzer with all AGC settings from 0V to Vcc.
4.6.6
S11 is measured at the test board RF input F type connector, using a network analyzer calibrated to 75Ω F type
connector.
4.6.7
S22 is not measured since the device is not designed to be impedance matched on its output. Rather the output
load is used as the terminating impedance for the device.
4.6.8
NF is measured using a NF meter with a 50/75Ω pad on the input.
4.7
9
8
7
6
5
4
3
2
1
0
Gain
AGC
S11
S22
NF
Typical performance characteristics
0
100
Figure 16 - SL2150F NF and Gain at Maximum Gain Setting
200
300
400
Input frequency
500
NF
gain
600
700
800
900
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