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phaser: n=2, m=16, sync_dly
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@ -20,7 +20,7 @@ PHASER_ADDR_SPI_DIVLEN = 0x0b
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PHASER_ADDR_SPI_SEL = 0x0c
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PHASER_ADDR_SPI_DATW = 0x0d
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PHASER_ADDR_SPI_DATR = 0x0e
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# PHASER_ADDR_RESERVED0 = 0x0f
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PHASER_ADDR_SYNC_DLY = 0x0f
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PHASER_ADDR_DUC0_CFG = 0x10
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# PHASER_ADDR_DUC0_RESERVED0 = 0x11
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PHASER_ADDR_DUC0_F = 0x12
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@ -172,16 +172,17 @@ class Phaser:
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self.dac_write(0x00, 0x019c) # I=2, fifo, clkdiv_sync, qmc off
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self.dac_write(0x01, 0x040e) # fifo alarms, parity
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self.dac_write(0x02, 0x70a2) # clk alarms, sif4, nco off, mix, mix_gain, 2s
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self.dac_write(0x03, 0x6000) # coarse dac 20.6 mA
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self.dac_write(0x03, 0x4000) # coarse dac 20.6 mA
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self.dac_write(0x07, 0x40c1) # alarm mask
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self.dac_write(0x09, 0x8000) # fifo_offset
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self.dac_write(0x09, 0x4000) # fifo_offset
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self.set_sync_dly(0)
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self.dac_write(0x0d, 0x0000) # fmix, no cmix
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self.dac_write(0x14, 0x5431) # fine nco ab
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self.dac_write(0x15, 0x0323) # coarse nco ab
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self.dac_write(0x16, 0x5431) # fine nco cd
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self.dac_write(0x17, 0x0323) # coarse nco cd
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self.dac_write(0x18, 0x2c60) # P=4, pll run, single cp, pll_ndivsync
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self.dac_write(0x19, 0x8404) # M=8 N=1
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self.dac_write(0x19, 0x8814) # M=16 N=2
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self.dac_write(0x1a, 0xfc00) # pll_vco=63
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delay(.2*ms) # slack
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self.dac_write(0x1b, 0x0800) # int ref, fuse
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@ -196,7 +197,7 @@ class Phaser:
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delay(.1*ms)
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if lvolt < 2 or lvolt > 5:
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raise ValueError("DAC PLL tuning voltage out of bounds")
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self.dac_write(0x20, 0x0000) # stop fifo sync
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# self.dac_write(0x20, 0x0000) # stop fifo sync
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self.dac_write(0x05, 0x0000) # clear alarms
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delay(1*ms) # run it
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alarm = self.get_sta() & 1
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@ -488,6 +489,16 @@ class Phaser:
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self.dac_write(0x04, 0x0000) # clear iotest_result
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return errors
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@kernel
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def set_sync_dly(self, dly):
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"""Set SYNC delay.
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:param dly: DAC SYNC delay setting (0 to 7)
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"""
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if dly < 0 or dly > 7:
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raise ValueError("SYNC delay out of bounds")
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self.write8(PHASER_ADDR_SYNC_DLY, dly)
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class PhaserChannel:
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"""Phaser channel IQ pair.
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