VCTCXO reference oscillator

The VCTCXO is the reference oscillator for the SHF synthesizer. It also generates reference clock signal for the digital parts in the system blocks. The oscillation frequency can be adjusted using the AFC control voltage.

Table 39. Electrical specifications, VCTCXO

Parameter

Min.

Typ.

Max

Unit/.Notes

Supply voltage, Vcc

2.B0

2.70

2.S0

V

Current consumption, Icc

1.5

mA

Operating temperature range

-S0

+S0

deg. C

Technical Documentation 3. RF+System Module KL8

Table 39. Electrical specifications, VCTCXO (continued)

Parameter

Min.

Typ.

Max

Unit/.Notes

Nominal frequency

26

MHz

Duty Cycle

40

60

% , (T+) / (Ttotal)

Start up time output level within 90% and output frequency limits +/-0.05ppm from the final value

5

Table 40. PLL parameters

Parameters

Min

Typ

Max

Units

Input frequency range

1700

4100

MHz

Input signal level (differential)

400

mVpp

Reference input freq

26

30

MHz

Reference input level

500

Table 41. Electrical specifications, Zo=50 ohm

Parameter

Conditions

Rating

Unit/ Notes

Supply voltage, Vcc

2.7 +/- 0.1

V

Supply current, Icc

Vcc = 2.8 V, Vc = 2.25 V

< 20

mA

Control voltage, Vc

Vcc = 2.55...2.85 V

0.8... 3.7

V

Output power level

Vcc = 2.5 V f = 3420...3840 MHz

>-3 min.

dBm

Output impedance and VSWR

f = 3420...3840 MHz

50 ohms,VSWR < 2

3. RF+System Module KL8 Technical Documentation

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