Downconverter L / S / Uhf-Band Input; Frequency Resolution; Phase Noise (Dbc/Hz); Group Delay - PEAK COMMUNICATIONS P7001R Installation And Operating Handbook

1.3.4 DownConverter L / S / UHF-Band Input

950-2150MHz (2200-2300MHz for S-Band, 390-450MHz for UHF-Band) range of limit
of input.

1.3.5 Frequency Resolution

1 Hz Output frequency step size.

1.3.6 Phase noise (dBc/Hz)

-65dBc/Hz @ 10Hz; -75dBc/Hz @ 100Hz; -80dBc/Hz @ 1kHz; -85dBc/Hz @ 10kHz; -
95dBc/Hz @ 100kHz; -110dBc/Hz @ 1MHz. Typical depending on model
At 100Hz away from the carrier the average relative intensity of the carrier in CW mode
at that point is 75dB lower than the centre frequency

1.3.7 Group delay

2
Linear 0.025nS, Parabolic 0.015nS/MHz , Ripple 1nS p-p.
The relative timing distortion imposed on a signal passing through the converter within
the 18MHz band at 70MHz. This is due mainly to the internal filters. The group delay
profile is described mathematically as follows
The linear function describes the straight line slope across the 36MHz range. At
0.025nS over 36MHz the slope across the pass band calculates to 0.025x36=0.9nS.
The parabolic function is a quadratic function and can be converted at any point to a
linear function by multiplying the specification parameter by the square of the frequency
2
offset. For example for a Parabolic specification of 0.015nS/MHz at a frequency of
60MHz the offset is 10MHz (70-60). This can be expressed in the form of an actual
delay by calculating (70-60) squared x 0.015ns which is 100x0.015=1.5nS. This figure
is always positive and the corresponding frequency at 80MHz calculates in this
example to the same figure of 1.5nS. Note that the group delay is defined for a 70MHz
IF and the group delay for a 140MHz is considerably improved especially the parabolic
function.
The ripple parameter defines the limits of the balance of the group delay distortion after
the linear and parabolic functions have been subtracted. This distortion is not
necessarily a sinusoidal waveform and is important when considering high symbol rates

1.3.8 UpConverter Conversion Gain

Gain; +20dB ±1dB
Attenuation; 0-30dB, stepped 0.1dB
With maximum attenuation the Gain of the converter is set to -10dB (to lose 10dB
through the conversion process) or with minimum attenuation to +20dB (to gain 20dB).
The finite gain set is specified to be within 2dB of the setting and the step size is 0.1dB.
The tolerance of the step size is not specified but should not exceed 0.05dB per step.

1.3.9 DownConverter Conversion Gain

Gain; +30dB ±1dB
Attenuation; 0-30dB, stepped 0.1dB
Page 7 P7001R & P7002R Series Converters