DS335 Synthesized Function Generator
DS335 Synthesized Function Generator
DS335 Synthesized Function Generator
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4-16 Calibration<br />
<strong>DS335</strong> CALBYTES<br />
Number Name Meaning<br />
0 OSC_FREQ Sets 10 MHz clock. 0 to 4095. Nom:2048<br />
1 SINE_AMP L.F. Sine amplitude. 29,000 to 36,000. Nom:2^15.<br />
2 SQ_AMP L.F. Square amplitude. 29,000 to 36,000. Nom:2^15.<br />
3 TRI_AMP L.F. Triangle amplitude. 29,000 to 36,000. Nom:2^15.<br />
4 RAMP_AMP L.F. Ramp amplitude. 29,000 to 36,000. Nom:2^15.<br />
5 NOISE_AMP L.F. Noise amplitude. 29,000 to 36,000. Nom:2^15.<br />
6 OFFS_GAIN Adjusts gain for output offsets. 29k-36k Nom:2^15<br />
7 SW_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
8 0dB_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
9 2dB_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
10 4dB_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
11 6dB_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
12 8dB_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
13 10dB_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
14 12dB_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
15 14dB_OFF +/-127. Nom:0. Value added to 12 bit Offset DAC.<br />
Pre-attenuator gain calibration values. These values are linear in the measured gain for the pre-attenuator.<br />
16 PRE_0dB Always set to 2^16-1 (65535). The reference gain.<br />
17 PRE_2dB +/- 5% from nominal value of 52057.<br />
18 PRE_4dB +/- 5% from nominal value of 41350.<br />
19 PRE_6dB +/- 5% from nominal value of 32845.<br />
20 PRE_8dB +/- 5% from nominal value of 26090.<br />
21 PRE_10dB +/- 5% from nominal value of 20724.<br />
22 PRE_12dB +/- 5% from nominal value of 16461.<br />
23 PRE_14dB +/- 5% from nominal value of 13076.<br />
Post-attenuator gain calibration values. These values are linear in the measured gain for the post-amplifier<br />
attenuator. There are two of these tables corresponding to the measured gains in the 50 Ohm, and High-<br />
Impedance load conditions. These tables compensate for attenuator errors, finite amplifier output resistance,<br />
internal 50 Ohm resistor tolerances, and reflects the fact that the output amplitude of high-impedance loads is<br />
twice that of the 50 Ohm cases.<br />
High Impedance table goes first, as its first entry is the reference gain for all other measurements:<br />
24 HI_0dB Fixed at 2^16-1 (65535). Reference gain level.<br />
25 HI_2dB +/- 5% from nominal value of 52057.<br />
26 HI_4dB +/- 5% from nominal value of 41350.<br />
27 HI_6dB +/- 5% from nominal value of 32845.<br />
28 HI_8dB +/- 5% from nominal value of 26090.<br />
29 HI_10dB +/- 5% from nominal value of 20724.<br />
30 HI_12dB +/- 5% from nominal value of 16461.<br />
31 HI_14dB +/- 5% from nominal value of 13076.<br />
32 HI_16dB +/- 5% from nominal value of 10386.<br />
33 HI_18dB +/- 5% from nominal value of 8250.<br />
34 HI_20dB +/- 5% from nominal value of 6553.<br />
35 HI_22dB +/- 5% from nominal value of 5205.<br />
36 HI_24dB +/- 5% from nominal value of 4135.<br />
37 HI_26dB +/- 5% from nominal value of 3284.<br />
38 HI_28dB +/- 5% from nominal value of 2609.<br />
39 HI_30dB +/- 5% from nominal value of 2072.<br />
<strong>DS335</strong> <strong>Synthesized</strong> <strong>Function</strong> <strong>Generator</strong>
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