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tester: tweak suservo 

* p gain 1 to get reasonable power
* refine testing instructions and comments
This commit is contained in:
Robert Jördens 2021-08-19 09:17:14 +02:00
parent 4d21a72407
commit a53162d01d
1 changed files with 25 additions and 20 deletions
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41
artiq/frontend/artiq_sinara_tester.py
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@ -96,7 +96,8 @@ class SinaraTester(EnvExperiment):
self.suschannels[name] = self.get_device(name)
# Remove Urukul, Sampler, Zotino and Mirny control signals
# from TTL outs (tested separately) and remove SUServo Urukuls
# from TTL outs (tested separately) and remove Urukuls covered by
# SUServo
ddb = self.get_device_db()
for name, desc in ddb.items():
if isinstance(desc, dict) and desc["type"] == "local":
@ -116,7 +117,6 @@ class SinaraTester(EnvExperiment):
del self.urukul_cplds[desc["arguments"]["cpld0_device"]]
if "dds1_device" in desc["arguments"]:
del self.urukuls[desc["arguments"]["dds1_device"]]
if "cpld1_device" in desc["arguments"]:
del self.urukul_cplds[desc["arguments"]["cpld1_device"]]
elif (module, cls) == ("artiq.coredevice.sampler", "Sampler"):
cnv_device = desc["arguments"]["cnv_device"]
@ -600,20 +600,19 @@ class SinaraTester(EnvExperiment):
channel.set_iir(
profile=loop_nr,
adc=loop_nr, # take data from Sampler channel
kp=-.1, # -0.1 P gain
ki=0./s, # low integrator gain
kp=-1., # -1 P gain
ki=0./s, # no integrator gain
g=0., # no integrator gain limit
delay=0. # no IIR update delay after enabling
)
# setpoint 0.5 (5 V with above PGIA gain setting)
# 0 phase
delay(100*us)
channel.set_dds(
profile=loop_nr,
offset=-.3, # 3 V with above PGIA settings
frequency=10*MHz,
phase=0.)
# enable RF, IIR updates and profile 0
# enable RF, IIR updates and set profile
delay(10*us)
channel.set(en_out=1, en_iir=1, profile=loop_nr)
@ -622,27 +621,33 @@ class SinaraTester(EnvExperiment):
self.core.break_realtime()
channel.set_config(enable=1)
delay(10*us)
# check servo enabled
assert channel.get_status() & 0x01 == 1
delay(10*us)
def test_suservos(self):
print("*** Testing SUServos.")
print("Initializing...")
for card_n, (card_name, card_dev) in enumerate(self.suservos):
print(card_name + "...")
print("Initializing modules...")
for card_name, card_dev in self.suservos:
print(card_name)
self.setup_suservo(card_dev)
print("Setup SUServo loops.")
print("Urukul0 channels corresponds to Sampler channels 0-3 and Urukul1 channels correspont to Sampler channels 4-7.")
print("Only proportional gain and offset such that 1.5V on the input gives 6dB less output power than at 0V input. (open loop)")
print("Frequency: 10MHz. Output power at 0V input: ~-29dBm")
for card_n, channels in enumerate(chunker(self.suschannels, 8)):
for channel_n, (channel_name, channel_dev) in enumerate(channels):
self.setup_suservo_loop(channel_dev, channel_n)
print("...done")
print("Setting up SUServo channels...")
for channels in chunker(self.suschannels, 8):
for i, (channel_name, channel_dev) in enumerate(channels):
print(channel_name)
self.setup_suservo_loop(channel_dev, i)
print("...done")
print("Enabling...")
for card_n, (card_name, card_dev) in enumerate(self.suservos):
for card_name, card_dev in enumerate(self.suservos):
print(card_name)
self.setup_start_suservo(card_dev)
print("...done")
print("Each Sampler channel applies proportional amplitude control")
print("on the respective Urukul0 (ADC 0-3) and Urukul1 (ADC 4-7, if")
print("present) channels.")
print("Frequency: 10 MHz, output power: about -9 dBm at 0 V and about -15 dBm at 1.5 V")
print("Verify frequency and power behavior.")
print("Press ENTER when done.")
input()