CIF06 Datasheet, PDF (2/9 Pages) TEMEX – CI F06 Expander and Compressor

Digital pulse compression module
CI F06 Expander and Compressor
Technical description
CI F06 functional block diagram is featured on Fig. 1.
WF MS el_E
Wa veform
sel ectio n
FP GA
Trigger
S to red
To
Tim ing
Wa veforms
F0
DA C
Ou t_E
WF MS el_C
Wa veform
sel ectio n
In_ C
To
FIR
To
ADC
Ba seBa nd
Filter
F0
DA C
Ou t_C
Clo ck
Power S upply
Po wer
Co ntrol
Sy stem
Clo ck
Co nnec t
JTA G
Pro gram
FP GA
Superv ision
BIT E
Unit_O K
Fig. 1 : CI F06 functional block diagram
Unit description.
The internal low noise system clock is locked on an external clock (derived from the RADAR system clock). For
proper operation, the clock should be a good quality clock, with a low phase noise close to the carrier.
CI F06 unit is provided with FPGA firmware loaded. Functions, and channels specifications (time dispersion,
compressed pulse width, side lobes level…) should be provided by customer; Rakon will customize the FPGA
program to fulfill customer requirements.
CI F06 unit continuously monitors internal power supply and FPGA program integrity. If voltage exceeds nominal
levels, or if FPGA program is corrupted, Unit_OK output is deasserted, and LED is turned off. The Unit_OK output
indicates the GO-NOGO state of the compressor.
Pulse expander channel description.
After each Trigger pulse, a chirp defined by the samples set selected by WFMSel_E is generated, and presented
to the DAC input to be translated into an analog signal. Trigger input have to be synchronized with Clock input.
For better compatibility with old SAW based subsystems, an adjustable additional delay may be inserted.
Expander waveform is selected among 2 possible waveforms, using WFMSel_E input, as presented in Table 1.
Each time WFMSel_E signal changes, the new set of waveform coefficients will be active for the next trigger
pulse.
Table 1 : Expander waveform selection
WFMSel_E Expander waveform
0
Waveform E0 (TBD)
1
Waveform E1 (TBD)
Oct 16^th, 2015
CI F06 Expander and Compressor Revision B3
2/9
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