Attenuation Files; Frequency Offset Files - DBM ACE9600 Operating Manual

Advanced Channel Emulator
Update Rate
1000ms
1000ms
500ms
500ms
200ms
200ms
100ms
100ms
50ms
50ms
20ms
20ms
10ms
10ms
5ms
5ms
2ms
2ms
1ms
1ms
1st data point in .dat file
46
Range of Achievable Slew Rates
Min 0.1ns/sec
Max 3.2767us/sec
Min 0.2ns/sec
Max 6.5535us/sec
Min 0.5ns/sec
Max 16.384us/sec
Min 1.0ns/sec
Max 32.767us/sec
Min 2.0ns/sec
Max 65.535us/sec
Min 5.0ns/sec
Max 163.84us/sec
Min 10ns/sec
Max 327.67us/sec
Min 20ns/sec
Max 655.35us/sec
Min 50ns/sec
Max 1638.4us/sec
Min 100ns/sec
Max 2000.0us/sec
ms.1234567
Atte n u a tio n File s
Each data line consists of five characters in a "xx.xx format.
•
•
Range is 0 to 70 dB in 0.10dB steps
•
Step size between any two adjacent points can be up to 70
•
Units are dB
Fre q u e n c y Offs e t File s
Frequency offset is typically used to impose the carrier Doppler shift
that occurs as a result of time varying path length change. Note that
dynamically changing delay in the ACE9600 causes a frequency shift
proportional to the frequency offset from the instrument's nominal
center frequency. For example, if the instrument is tuned to 1000 MHz,
an incoming frequency component at 1000 MHz will experience no
shift with changing delay, whereas frequency content above and below
1000 MHz will shift away from the 1000 MHz when delay is
decreasing. Therefore chip period variations as a function of Doppler
are emulated correctly, irrespective of the actual signal carrier
frequency. Carrier Doppler shift however must be computed based on
the actual carrier frequency, and applied using a Frequency Offset file.
0.01ns/sec 1ps/sec
0.32767us/sec 32.767ns/sec
0.02ns/sec 2ps/sec
0.65535us/sec 65.535ns/sec
0.05ns/sec 5ps/sec
1.6384us/sec 163.84ns/sec
0.1ns/sec 10ps/sec
3.2767us/sec 327.67ns/sec
0.20ns/sec 20ps/sec
6.5535us/sec 655.35ns/sec
0.5ns/sec 50ps/sec
16.384us/sec 1638.4ns/sec
1.0ns/sec 100ps/sec
32.767us/sec 3276.7ns/sec
2.0ns/sec 200ps/sec
65.535us/sec 6553.5ns/sec
5.0ns/sec 500ps/sec
163.84us/sec 16384ns/sec
10.0ns/sec 1000ps/sec
200.00us/sec 20000ns/sec
ms.12345678 ms.123456789
dBm
0.1ps/sec
3.2767ns/sec
0.2ps/sec
6.5535ns/sec
0.5ps/sec
16.384ns/sec
1ps/sec
32.767ns/sec
2ps/sec
65.535ns/sec
5ps/sec
163.84ns/sec
10ps/sec
327.67ns/sec
20ps/sec
655.35ns/sec
50ps/sec
1638.4ns/sec
100ps/sec
2000.0ns/sec
ms.1234567890
ACE9600
Operations Manual