zl10038 ETC-unknow, zl10038 Datasheet - Page 16

• Manufacturer Part Number: zl10038
• Description: Advanced Modulation Dvb-s2 Compliant Satellite Tuner With Bypass
• Manufacturer: ETC-unknow

2.3
The ZL10038 provides an independent bypass function, which can be used for driving a second receiver module.
The electrical characteristics of the RF input are unchanged by the state of the RF bypass.
The bypass provides a differential buffered output from the input signal with a nominal 3.5 dB gain. The unused
output should be terminated as in Figure 2 on page 2.
The bypass function is enabled by a single register bit and is not disabled by either the PD bit or the SLEEP pin.
When disabled the bypass function is in a ‘power-down’ state. On power up the bypass function is enabled.
2.4
The filter bandwidth is controlled by a Frequency Locked Loop (FLL) the timing of which is derived from the
reference crystal source by a reference divider. Five control bits set the system reference division ratio and the
baseband filter bandwidth can be programmed with a further six control bits for a nominal range of 4 - 40 MHz
1. specification compliant over the range 8 - 35 MHz.
RF Bypass
Baseband Filter
- 2 0
- 3 0
- 2 5
- 10
- 15
Figure 9 - RF Input and Output (bypass) Return Losses
- 5
0
9 0 0 10 0
0
110
0
12 0
0
13 0
Zarlink Semiconductor Inc.
0
F re que nc y ( M H z)
14 0
ZL10038
0
S11 RFBypass On
S22 RFBypass On
150
0
16
16 0
0
170
0
18 0
0
19 0
0
2 0 0
0
2 10
0
2 2 0
0
Data sheet
1
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