Stanford Research Systems DS335, User Manual

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Performance Tests 4-9
DS335 Synthesized Function Generator
2) Read the AC voltage on the voltmeter. Repeat at 1 kHz and 10kHz. The
readings should be between 4.94 and 5.06 Vrms.
Triangle/Ramp Waves
specification: ±1.2%
1) Set the DS335 to triangle wave, 100Hz, 2.89Vrms (10 Vpp), and 50
Ω
Load Impedance.
2) Read the AC voltage on the voltmeter. Repeat at 1 kHz and 10kHz. The
readings should be between 2.85 and 2.93 Vrms.
Frequency > 100 kHz
Sine Waves
specification: ±0.1 dB (±1.2%), frequency > 100kHz
1) Connect the DS335's output to the thermal converter (because the
convertor has a 50
Ω
impedance no terminator is needed). Connect the
thermal converter output to the voltmeter using the most sensitive
voltmeter range since the nominal signal level is about 7mV DC. Allow
the DS335 at least 1/2 hour to warm up.
2) Set the DS335 to sine wave, 1 kHz, 3.00 Vrms, and 50
Ω
Load
Impedance. Allow the thermal converter 15 seconds to stabilize and
record the result as the 1kHz reference value.
3) Step the DS335's frequency in 500kHz steps from 0Hz to 3.1MHz. Allow
the thermal converter to stabilize at each frequency and record the
results.
4) Verify that the readings are within ±1.2 % of the 1 kHz reading for
frequencies above 1kHz.
Square Waves
specification: ±5%, frequency < 3.1MHz
1) Connect the DS335's output to the oscilloscope with a 50
Ω
terminator.
Set the DS335 to square wave, 1 kHz, 10Vpp, and 50
Ω
Load
Impedance. Set the scope to 2V/div and 0.1ms/div.
2) Step the DS335's frequency in 100kHz steps from 0kHz to 3.1 MHz.
3) Verify that the DS335's output is within ±5% of the 1kHz amplitude.
DC OFFSET ACCURACY This test measures the accuracy to the DS335's DC offset function.
DC Only
specification: 1.2% of setting ±.2mV
1) Connect the DS335's output to the voltmeter with a 50
Ω
terminator. Set
the DS335 to 0.0V amplitude, and 50
Ω
Load Impedance.