Bunch-by-bunch front/back end systems from Dimtel, Inc. currently exist in several versions: FBE-178L, FBE-500L, and FBE-500LT. LT variant has three front-end channels for full three planes of feedback. Differing specifications are indicated in the table below, when appropriate.
Parameter | FBE-178L | FBE-500L | FBE-500LT |
---|---|---|---|
Reference frequency (MHz) | 178.55 | 500 | |
RF input level (dBm) | 0 | ||
Reference output loss (dB) | 3.5 | 6.5 |
Parameter | FBE-178L | FBE-500L | FBE-500LT |
---|---|---|---|
Detection frequency (MHz) | 1428.4 | 1500 | |
Maximum operating input level (V peak) | 9.3 | ||
Absolute maximum input level (V peak) | 14 | ||
Attenuation range (dB) | 0–31.5 | ||
Nominal output | 190 mV peak-to-peak (-10.4 dBm) | 780 mV peak-to-peak (+1.8 dBm) | |
Output filter | 5th order Bessel low-pass | ||
3 dB bandwidth (MHz) | 140 | 500 | |
Baseband pulse width (ns) | 3.8 | 1.9 | |
Phase shifter range (deg) | >360 | ||
Phase shifter resolution (deg/step) | 0.25 |
Parameter | FBE-178L | FBE-500L | FBE-500LT |
---|---|---|---|
Carrier frequency (MHz) | 892.75 | 1000 | 1000 or 1500 |
Input level (mV) | ±250 | ||
Attenuation range (dB) | 0–31.5 | ||
Maximum output level (Vin=250 mV, 0 dBm ref.) (dBm) | 4.5 | 10 | |
Output filter | 3rd order Bessel low-pass | 5th order Bessel band-pass | |
3 dB bandwidth (MHz) | 1130 | 660 | |
Phase shifter range (deg) | >360 | ||
Phase shifter resolution | 0.01–0.21 |