9.2 ZBUC Theory of Operation

The ZBUC is a low gain block up converter with a P1dB of 0dBm. This topology allows the system to be integrated with little impact on the general electrical specifications of the SSPA module.

The ZBUC utilizes single up conversion from L-Band to the desired RF band. The local oscil- lator circuits are designed to maintain the lowest possible output phase noise. The frequency synthesizer utilizes industry leading technology which allows for phase noise performance previously unattainable in PLL design. Typical phase noise specifications are outlined in Table 9-2.

Table 9-2: ZBUC RF output phase noise specification

Offset

Guaranteed

C-Band

X-Band

Ku-Band

Ka-Band

Units

Maximum

(Typical)

(Typical)

(Typical)

(Typical)

 

 

 

 

 

 

 

 

 

10 Hz

-30

-60

-60

-50

-60

dBc/Hz

 

 

 

 

 

 

 

100 Hz

-60

-80

-75

-65

-72

dBc/Hz

1 KHz

-70

-80

-75

-72

-75

dBc/Hz

 

 

 

 

 

 

 

10 KHz

-80

-85

-100

-90

-88

dBc/Hz

100 KHz

-90

-120

-110

-110

-112

dBc/Hz

 

 

 

 

 

 

 

1 MHz

-90

-125

-122

-120

-122

dBc/Hz

 

 

 

 

 

 

 

Band selectivity is accomplished using the most aggressive filtering possible while maintain- ing specified power and spurious performance.

9.3 Smart Reference Technology

Paradise Datacom’s new ZBUC comes standard with smart reference technology. Smart reference technology allows the system operator to change external system reference frequency without any system configuration required. The ZBUC will automatically sense and lock to any one of the following system reference frequencies: 5, 10, 20, 25, and 50 MHz. With the internal reference option installed the ZBUC will operate with no external reference applied. In the event the system operator wishes to operate on external reference, the ZBUC will automatically sense the presence of an external reference and switch to external reference mode. With the internal reference option installed, the internal reference also becomes a backup reference which will become active in the event that external system reference is lost.

External reference is applied to the ZBUC via the L-Band input IFL and is routed to the frequency synthesizer using the built-in demux circuitry.

Operations Manual, HPA2, Compact Outdoor SSPA

205486 REV F

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Paradise 205486 REV F manual Zbuc Theory of Operation, Smart Reference Technology, Zbuc RF output phase noise specification
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205486 REV F specifications

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