Stanford Research Systems DS345, Manual

Page: 93 / 139

Calibration
6-2
DS345 CALBYTES
Number Name Autocal Meaning
0 Oscillator Cal N Tunes Oscillator. Range = 0 - 4095
1 +5 V Ref Cal N Value of +5 ref voltage. Value = 32768 *(Vref/5.00)
2 ADC Gain Y ADC Gain correction.
3 ADC Offset Y ADC Offset correction.
4 DC Offset Gain Y DC ouput offset gain fix.
5 DC Offset offset Y DC output offset offset fix.
6 Attenuator 0 dB N Gain correction for 0 dB attenuator
7 Attenuator 6 dB N Gain correction for 6 dB attenuator
8 Attenuator 12 dB N Gain correction for 12 dB attenuator
9 Attenuator 18 dB N Gain correction for 18 dB attenuator
10 Attenuator 24 dB N Gain correction for 24 dB attenuator
11 Attenuator 30 dB N Gain correction for 30 dB attenuator
12 Attenuator 36 dB N Gain correction for 36 dB attenuator
13 Attenuator 42 dB N Gain correction for 42 dB attenuator
14 System amp DAC Y Offset of system amplitude DAC
15 ASIC amp DAC Y Offset of ASIC amplitude DAC
16 Sine DC gain Y Sets the sinewave DC gain
17 Square DC gain Y Sets the squarewave DC gain
18 Bessel DC gain Y Sets the Bessel (tri, ramp, arb) DC gain
19 Waveform DAC offset Y Offset of waveform DAC
NOTE: The following calbytes are frequency dependent. The table value for a particular frequency is given
by: TABLE BASE Frequency (Hz)/312500.
20-117 Sine Amplitude N Sine wave amplitude correction
118-215 Square Amplitude N Square wave amplitude correction
216-313 Doubler Offset Y Frequency doubler offset fix
314-411 Carrier Null N Sine wave carrier null correction
412-509 Square Symmetry N Square symmetry fix