Serial CRX8-III-1-xx (destination)
- Backplane serial number:
- Power Supply serial number:
- Receiver board serial numbers:
- Channel 1:
- Channel 2:
- Channel 3:
- Channel 4:
- Channel 5:
- Channel 6:
- Channel 7:
- Channel 8:
1. Checklist
- Check integrity of enclosure hardware:
- All screws secured on power supply:
- All screws secured on backplanes:
- All screws secured on all receiver boards:
- Type-N back panel connectors well tightened:
- Eight antenna cables identical length:
- Two LO cables identical length:
- DC input ferrites on bottom of baseplate front and back:
- secure with ferrite cores as in DDS.
- Loop excess wire through rear ferrite.
- +12v jumper wire on back of LO backplane:
- Tiny patch wires next to I and Q test points:
2. Power supply measurements
Use the large B&K bench power supply only.
Parallel mode, tracking.
Load on right-side terminals.
Right side readout set to volts, left side to amps.
Set voltage to 12.5 volts, no load. Current limit mid-range.
Turn on receiver. Turn up current limit until the voltage comes back up to 12.5 volts (with some headroom).
Note: to read current, you must temporarily read the current on the right supply and add that to the reading on the left).
- DC current reading (A): Left:_________ Right:_________ Sum:
- DC voltage +12V at backplane terminal strip:
- DC voltage +15V at backplane terminal strip:
- DC voltage -15V at backplane terminal strip:
- GALI-84 LO (~5.62 V): I:_______ Q:_________
- 12 volt test point on backplane:
- DC voltage +12V at Receiver 1:
- DC voltage +15V at Receiver 1:
- DC voltage -15V at Receiver 1:
