Evaluating the Waveform and Pattern Generator Feature
This blog is in continuation from the Rohde & Schwarz Oscilloscope Kit RTM3K-COM4 - Review
Specifications of the Waveform/function Generator in RTM3004
Fig: Specifications of the RTM Waveform Generator
Testing the Waveform Generator in RTM 3004
As it is clear from the specifications, this is a decent but basic 14 bit waveform generator with a low sampling rate of 250 Msamples/sec and has 3% amplitude accuracy. It can generate sine, pulse, rectangle, ramp, triangle, sinc and exponential waveforms with maximum 10 MHz or a lower 1 MHz frequency.
The waveforms were tested by inputing the waveform patterns from RTM 3004 waveform generator into Tektronix MSO 5204 oscilloscope of 2 GHz BW (Ref higher BW with 10GSa/s sampling rate). Both the devices were powered separately using a GND loop isolating power supply Ref. The isolation was done to avoid forming GNDing loop connection between the DUT (RTM 3004) and Tek MSO 5204.
Fig: Setting up the Function Generator Settings in RTM 3004
Fig: Sine Signal from the RTM 3004 waveform generator
Fig: SinC Signal from the RTM 3004 waveform generator
Fig: Pulse Signal from the RTM 3004 waveform generator
Fig: Triangle Signal from the RTM 3004 waveform generator
Fig: Ramp Output Signal from the RTM 3004 waveform generator
Fig: Arbitrary Output Signal from the RTM 3004 waveform generator
Experiments with the Pattern Generator
In the RTM-3004 oscilloscope; the pattern generator is embedded in the oscilloscope itself. Normally, I have worked with stand-alone pattern generator devices. This functionality adds a uniqueness to the oscilloscope as it is very useful tool for digital engineers. The RTM-3004 has a 4 bit programmable pattern generator using which one can generate square wave, pulse patterns or any user defined patterns. Each channel can be programmed individually and used for digital testing. It can produce a repetitive signals or single shot pulse for triggering purposes. The voltage levels generated by the pattern generator are normally complaint with the digital I/O electronics standards such as TTL, LVDS, LVCMOS, LVTTL and others.
Fig: Specifications of the RTM 3004 Pattern Generator
I leave the experimental test with the Pattern Generator to future.
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