NMRENA Documentation

How to operate a neutron monitor using NMRENA

How to probe the frontend board

Start the python console without autostart:

./nm64.py

Scan the discriminators for the pedestal

cmd("nm/disc/scan")
for i in range(24): print(cmd(f"v nm64_scan[{23-i}]")) 

If the rresults are 0x0008 of 0xfff8, something is wrong.

Step the DACs through the full range and see if the discriminators respond.

for i in range(0, 0x10000, 0x0800):
    print(f"0x{i:04x}", cmd(f"nm/disc/disc/rose/fell/clear/load {i}"))

Ramp the DACs through their complete range for probing with a voltmeter or oscilloscope.

while (True):
    for i in range(0, 0x10000, 0x0010):
         print(f"0x{i:04x}", cmd(f"nm/disc/disc/rose/fell/clear/load {i}"))

Entertain the SPI for probing with a logic analyser

while True: print(cmd(f"nm/thr/i=11 0x1234")); time.sleep(0.1)