Lambda SR1, Руководство по эксплуатации, Страница: 37 / 317

SR1 Operation 37
© 2014 Stanford Research Systems
providing a maximum waveform frequency of 28.8 kHz
OSR Synchronizes the sampling rate of the analog generator to the digital audio output
sampling rate set in the
Digital I/O panel.This setting is useful for performing cross-
domain measurements using the FFT Chirp waveform or Multitone techniques.
Maximum waveform frequency is 45% of the digital audio sampling rate.
ISR Synchronizes the sampling rate of the analog generator to the sample rate of the
received Digital Audio signal. Maximum waveform frequency is 45% of the digital audio
sampling frequency.
Mode controls the output mode of the Analog Generator.
Mono The same waveform is output to both the A and B channels. The amplitude of each
channel is still separately adjustable, but the waveform is the same.
Stereo Each channel can be configured with a different waveform.
Output Configuration selects the output connector configuration. (See the diagram below)
Unbal Gnd. Outputs to the both the XLR and BNC connectors. The BNC shield and XLR pin 3(-) are
connected to chassis ground through a 5 resistor. XLR pin 1 is connected directly to
chassis ground. The BNC center pin and XLR pin 2 both are connected to the
unbalanced signal.
Unbal Float Outputs to the both the XLR and BNC connectors. The BNC shield and XLR pin 3(-) are
connected to chassis ground through a high impedance (~100k,1uF). XLR pin 1 is
connected directly to chassis ground. The BNC center pin and XLR pin 2 both are
connected to the unbalanced signal.
Bal Gnd. Outputs to only the XLR connectors. XLR pin 1 is connected directly to chassis ground.
XLR pins 2(+) and 3(-) carry the balanced signal which is symmetric around chassis
ground.
Bal Float Outputs to only the XLR connectors. XLR pin 1 is connected directly to chassis ground.
XLR pins 2(+) and 3(-) carry the balanced signal which is unreferenced to chassis
ground.
Bal Common Similar to Balanced Ground except that the same signal is present on pins 2 and 3.
This allows testing the Common Mode Rejection Ratio of external devices.