Chaparral Corotor II Setup Guide
When upgrading your feed horn assembly, determine what type of feed horn is currently there. If it is the type that has 1- hex screw (adjustable scaler) holding the lnb port assembly, then just remove the center part and use the existing scaler ring if possible. This will guarantee that the f/d (focal Distance) is exactly at the same distance as the original setup. If the old scalar feed assembly is one solid piece, then you need to measure the distance from the center of dish to the edge of opening of feed port (where blue cover is located) Make sure that replacing that the measurement is exactly the same to guarantee maximum signal performance. The feed ports should be at the 5 or 11 O'clock position. If for some reason you have already removed the old feed horn and are trying to figure out this distance then look at bolt pattern on the quad arms and use the same location and this will be close.
| Part Number | Corotor II Plus: 11-5000-62 Corotor II Plus Wideband: 11-7128-62 |
| C-Band Frequency Range | 3.7
- 4.2 GHz (3.4 - 4.2GHz for Wideband) |
| Ku-Band Input Frequency Range: |
11.7 - 12.7 GHz (10.95 - 12.75GHz for Wideband) |
| f/D Range | .32 to .45 |
| VSWR | 1.3:1 in both bands |
| Polarization | Linear; horizontal and vertical(Circular C-Band for Wideband model) |
| Cross Pol. Isolation | 20 dB or better |
| RF Ports |
C-Band: WR 229 compatible Ku-Band: WR 75 compatible |
| Power requirements | +5 VDC and TTL Logic Pulse |
| Weight | 1.40 Kg |
Determining the F/D of an unknown Dish Size:
Focal Distance = (Diameter)2 squared / 16 x Depth
After you have calculated the focal distance use it in following:
Focal Distance / Diameter = Scaler Feed Setting
Back to Cband Satellite Feedhorn