This document describes the differences between Time Domain Measurement (High Performance Waveform) TIMs.

Instruments Included in this TIM
- Dual Arbitrary Waveform Synthesizer, RI74211A
- Dual Digitizer (oscilloscope), RI74105B
- Dual Synthesized Sine Wave Source, RI74203C
- *Single Low Noise Source, RI8598_

*instrument not included in 8521 or 8572

Model TIM	Dual Arbitrary Waveform Synthesizer	Dual Digitizer (Oscilloscope)	Dual Synthesized Sine Wave Source	Single Low Noise Source	Change Summary
RI8594B	RI74211A	RI74105B	RI74203C	RI8598A	Improved Low Noise Clock
RI8594A	RI74211A	RI74105B	RI74203C	RI8585B	Added Low Noise Clock
RI8572A	RI74211A	RI74105B	RI74203C	-	Improved Waveform Synthesizer
RI9585A	RI74211A	RI74105B	RI74203C	-	Improved Waveform Synthesizer
RI8521C	RI74211A	RI74105B	RI74203C	-	No measurement impact. Internal component change
RI8521B	RI74211A	RI74105B	RI74203C	-	No measurement impact. Internal component change
RI8521A	RI74211A	RI74105B	RI74203C	-

Please request the TIM specifications from [email protected] for performance details. The model number above appears in the Cassini configuration window and enables instrument testplan buttons to be used for test plan development and real time control.

Current available models:
RI8594B Time Domain Measurement (Hi Perf Waveform) + Ultra Low Noise Clock
RI8594A Time Domain Measurement (Hi Perf Waveform) + Low Noise Clock
RI8572A Time Domain Measurement (HP Waveform)

Unavailable but supported models:
RI8585A Time Domain Measurement (Hi Perf Waveform) + Low Noise Clock    Replaced by RI8594A - improved high performance waveform
RI8521C Time Domain Measurement (Waveform) Replaced by RI8572A - improved high performance waveform
RI8521B Time Domain Measurement (Waveform)  Replaced by RI8521C - internal component changes, no measurement impact, only software update required.
RI8521A Time Domain Measurement (Waveform)  Replaced by RI8521B - internal component changes, no measurement impact, only software update required.

The primary difference is the Low Noise Clock that is used for high accuracy requirements.

Low Noise Source, RI8585B
Provides an ultra low noise PLL with built-in divider for optimal local oscillator reference signal used with devices requiring high-fidelity phase noise qualification.

Output Voltage Range (at 5 MHz) 0.1 VP-P to 3 VP-P (Into an Open Circuit)
Output Level Resolution 32 Bits
Frequency Range 100 MHz ÷ 2, 4, 8, 16 | 100 MHz | 200 Hz - 400 MHz
Phase Noise³ 170 dBc/Hz | 148 dBc/Hz | 120dBc/Hz
Frequency Resolution 0.2 Hz
Relative Phase Range 0 to 360°
Phase Resolution 0.1°
Output Impedance (typical) 50Ω


Low Noise Source, RI8598A
Provides an ultra low noise PLL with built-in divider for optimal local oscillator reference signal used with devices requiring high-fidelity phase noise qualification.

Output Power -20 dBm to +10 dBm
Output Level Resolution 0.1 dB
Frequency Range 5 MHz to 400 MHz
Phase Noise³ see plot
Frequency Resolution 0.1 Hz
Output Impedance (typical) 50Ω

Notes:

1) The waveform generator's signal voltage + offset voltage is limited to ±3V.
2) All time bases for system components are synchronized. Internal Time Base Accuracy is ±1 ppm variation from 10 to 30° C. and ±5 ppm absolute accuracy.
3) Typical performance at 20kHz offset.