The NRAO Model IV Autocorrelator produces a two-bit, three-level
correlation function which is Fourier transformed by an on-line
computer to produce a power spectrum. The different configurations
are shown below:
Autocorrelator Configurations:
AC
Code No. Rcvr. No. Ch. Comments
---- --------- ----------- ----------------------------------
0 one 1024 BW cannot be at 80MHz.
1 two 512 BW cannot be at 80MHz.
2 three 512/256/256 BW cannot be at 80MHz.
3 four 256 BW cannot be at 80MHz.
4 one 512 Only BW is 80 MHz.
5 two 256 Only BW is 80 MHz.
6 three 256/128/128 Only BW is 80 MHz.
7 four 128 Only BW is 80 MHz.
8 two 256/512 BW of Rcvr 1 is 80 MHz;
BW of Rcvr 2 cannot be 80 MHz.
9 four 128/128/256/256 BW of Rcvr 1,2 is 80 Mhz;
BW of Rcvr 2,4 cannot be 80 MHz.
Bandwidth Modes:
BW
Code BW
---- ----------
0 78.00 kHz
1 156.00 kHz
2 312.00 kHz
3 625.00 kHz
4 1.25 MHz
5 2.50 MHz
6 5.00 MHz
7 10.00 MHz
8 20.00 MHz
9 40.00 MHz
A 80.00 MHz