Stanford Research Systems DS345, Manual

Page: 84 / 139

Performance Tests
5-6
Square Wave
specification: ±3%
1) Set the DS345 to square wave, 100Hz, 5Vrms (10 Vpp).
2) Read the AC voltage on the voltmeter. Repeat at 1 kHz and 10kHz. The
readings should be between 4.85 and 5.15 Vrms.
Triangle/Ramp Waves
specification: ±3%
1) Set the DS345 to triangle wave, 100Hz, 2.89Vrms (10 Vpp).
2) Read the AC voltage on the voltmeter. Repeat at 1 kHz and 10kHz. The
readings should be between 2.80 and 2.97 Vrms.
Frequency > 100 kHz
Sine Waves
specification: ±0.2 dB (±2.3%), frequency < 20 MHz
±0.5 dB (±6%), frequency > 20 MHz
1) Connect the DS345's output to the thermal converter (because the conver-
tor 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 DS345 at least 1/
2 hour to warm up.
2) Set the DS345 to sine wave, 1 kHz, 3.00 Vrms. Allow the thermal convert-
er 15 seconds to stabilize and record the result as the 1kHz reference value.
3) Step the DS345's frequency in 2 MHz steps from 1kHz to 30.001 MHz. Al-
low the thermal converter to stabilize at each frequency and record the re-
sults.
4) Verify that the readings are within ±4.2 % of the 1 kHz reading for frequen-
cies below 20 MHz and within ±6.3% for frequencies above 20 MHz.
Square Waves
specification: ±6%, frequency < 20 MHz
±15%, frequency > 20 MHz
1) Connect the DS345's output to the oscilloscope with a 50
Ω
terminator.
Set the DS345 to square wave, 1 kHz, 10Vpp. Set the scope to 2V/div and
0.1ms/div.
2) Step the DS345's frequency in 2 MHz steps from 1kHz to 30.001 MHz.