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Specifications
Multiple Instrument synchronization
Multiple instruments can be connected together and synchronized to provide multi-channel synchronization.
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Sample clock |
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Source: |
From master card to slave boards through the local bus |
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Range and Resolution: |
Same as Sample Clock but limited to 80 Ms/s |
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Initial skew: |
<20 ns to the first master; 20 ns cumulative to additional slaves |
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Phase Offset
Between Instruments: |
Programmable from 0 to n points |
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Range: |
100mS/s to 100MS/s |
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Resolution: |
10 digits limited by 1 øHz |
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Accuracy: |
Same as reference |
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Stability: |
Same as reference |
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Reference |
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Standard: |
System clock, 0.01% (100ppm) |
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TCXO: |
0.0001% (1ppm) initial tolerance over a 19°C to 29°C temperature range; 1ppm/°C below 19°C and above 29°C; 1ppm/year aging rate |
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External: |
10 MHz TTL, 50% +/- 2% duty cycle |
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Sample Clock Modulation
| FM - Built-in Standard Waveforms |
| Sample clock can be frequency modulated by internal waveforms that are resident in internal memory (fixed waveforms) |
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| Modulation Source: |
Internal sine square, triangle or ramp |
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Modulation Frequency Range:
(Sine/Pulse) |
DC to 25 MHz (GX1200)
DC to 50 MHz (GX1201) |
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| Resolution: |
10 digits |
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| Accuracy: |
0.1% |
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| Peak Frequency Deviation: |
DC to 50 MHz |
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| Advance: |
Automatic, triggered, gated or software command |
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| Marker output and Level: |
Same as SYNC output |
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| Position: |
Fixed at carrier frequency |
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| FM - Downloaded Arbitrary Waveforms |
| Sample clock can be frequency modulate arbitrary waveforms that are downloaded by the user. |
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| Modulation source: |
User waveform, any shape, 10 to 20000 waveform points |
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| Modulation Sample Clock Range: |
1 mS/s to 2 MS/s |
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| Resolution: |
7 digits |
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| Accuracy: |
0.1% |
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| Peak Sample Clock Deviation: |
DC to 100 MHz |
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| Advance: |
Automatic, triggered, gated or software command |
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| Output and Level: |
Same as SYNC output |
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| Position: |
Programmable for selected sample clock frequency |
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| Waveform Download Rate: |
5 Meg points per second |
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FSK
Current segment is sampled continuously. TTL low level programs carrier sample clock, TTL high level programs shifted sample clock frequency. Sample clock changes coherently between frequencies. FSK operates on arbitrary waveforms only.
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| Carrier Sample Clock Range: |
100 mS/s to 100 MS/s |
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| FSK Stimuli: |
External - front panel; trigger input BNC. Low level = carrier sample clock; High level = hop frequency. Frequency range: From 10 MHz to DC. Internal - same as internal trigger range |
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| FSK Delay: |
Minimum 1 waveform cycle + 50 ns |
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Ramped FSK
Same as FSK except carrier sample clock ramps to shifted frequency at a rate defined by the ramp time parameter. TTL low level programs carrier sample clock, TTL high level programs shifted frequency.
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Ramp Time Range: |
10 s to 1øs, 3 digits, +/- .01% |
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Sweep
Sample clock sweeps continuously from start to stop, at a rate defined by the sweep time. More complex sweep modes and types can be generated using the FM mode in conjunction with the FM composer program.
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| Type: |
Linear or Logarithmic |
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| Direction: |
Up or down, depending on the start and stop setting |
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| Range: |
100 mS/s to 100 MS/s |
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| Time: |
1 ms to 1000 s, 7 digits, +/- .01% |
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| Advance: |
Automatic, triggered, gated or software command |
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| Marker and Level: |
Same as Sync output |
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| Position: |
Programmable for selected frequency |
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Operating Modes
Trigger Sources
Standard Waveforms Library
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| Waveforms: |
Sine, Triangle, Square, Pulse, Ramp, Sinc, Gaussian Pulse, Exponential decay/Rise Pulse, Noise, DC |
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| Frequency Range: |
Waveform dependent |
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Arbitrary Waveforms
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| Waveform Memory: |
2 Meg points |
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Memory segmentation
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| Number of segments: |
1 to 4096 |
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| Min segment Size: |
16 points |
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| Memory interleave: |
4 (Trace lengths divisible by 4) |
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| Vertical Resolution: |
14 bits (16,384 points) |
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| Waveform download Rate: |
5 Meg points/s |
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Sine Wave Performance
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| THD: |
0.05% to 100 KHz |
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| Non-related spurious: |
-55dBc below 1MHz;
-40dBc below 5MHz;
-35dBc below 10MHz |
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Sequenced Arbitrary Waveforms
Permits division of the memory bank into smaller segments. Segments may be linked, and repeated in user-selectable fashion to generate extremely long waveforms.
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| Advance Modes |
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| Automatic Sequence Advance: |
No triggers required to step from one segment to the next. Sequence is repeated continuously through a pre-programmed sequence list (table) |
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| Stepped Sequence Advance: |
Current segment is sampled continuously, external trigger advances to next programmed segment. Control input is TRIG IN connector. |
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| Single Sequence Advance: |
Current segment is sampled to the end of the segment including repeats and idles there. Next trigger advances to next segment. Control input is TRIG IN connector. |
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| Mixed Sequence Advance: |
Each step of a sequence can be programmed to advance a) automatically (automatic Sequence Advance), or b) with a trigger (Stepped Sequence Advance) |
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| Advance Source: |
External, Internal, or soft trigger |
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| Sequencer steps: |
From 1 to 4096 |
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| Segment loops: |
From 1 to 128 K |
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Outputs
SYNC/Marker Output
Provides dual functionality. Sync, which is synchronous with the output waveform and market ln FM and sweep modes.
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| Outputs: |
Front panel, Backplane TTL triggers, STAR |
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| Validator: |
BIT, LCOM |
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| Connectors: |
Front panel BNC, P2 |
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| Impedance: |
50 , +/- 1% |
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| Level: |
>2 V into 50, 4V nominal into 10K |
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| Protection: |
Temporary short to case ground |
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| Position: |
Point 0 to n, Programmable with 4-point resolution |
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| Width: |
Programmable with 4 points resolution |
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Sine Output
An output that is directly derived from the sample clock generator and has an output frequency equal to the programmed sample clock frequency including modulated waveform, such as FM, sweep, and FSK
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| Connector: |
Front panel SMB |
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| Impedance: |
50, +/- 1% |
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| Level: |
1 V into 50 |
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| Protection: |
Temporary short to case ground |
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| Source: |
Sample clock frequency |
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| Frequency Range and Resolution: |
Same as Sample clock |
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| Flatness: |
-3dB at 100 MHz |
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| THD: |
0.3% to 100 KHz; -55dBc to 1 MHz |
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| Non-related spurious: |
-45dBc<10 MHz; -35dBc < 100MHz |
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Inputs
General
| Power Requirements: |
10W maximum |
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| Current Consumption: |
+5V - 30mA;
+12V - 200mA;
-12V - 200mA;
+3.3V - 1.4A; |
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| EMC Certification: |
CE marked |
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| Dimensions: |
3U, single slot |
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| Operating temperature: |
0°C - 50°C |
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| Reliability: |
MTBF per MIL-HDBK-217E, 25°C, Ground Benign |
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| Safety: |
Designed to meet IEC 1010-1,
UL 3111-1, CSA 22.2 #1010 |
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| Workmanship Standards: |
Conform to IPC-A-610D |
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| Supplied accessories: |
CD containing Manual ArbConnection, ArbDetector and developer libraries |
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Descripcion
Features
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50 MS/s - GX1200 |
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100 MS/s - GX1201 |
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10 digits sample clock frequency setting, limited by 1 µS/s |
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1 ppm clock accuracy and stability |
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Occupies only a single slot |
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Multiple instrument synchronization |
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14-bit vertical resolution |
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2 MBit memory depth |
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Ultra fast waveform downloads using DMA |
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1 ppm clock stability |
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Extremely low phase noise carrier |
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Frequency agility: FSK, Ramped FSK, Sweep, FM, Arbitrary FM |
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Sequence generator controls 4096 segments, 4096 links, and 128K loops |
The GX1200/1201 is a single-channel PXI-based Arbitrary Waveform Generator. The GX1200/1201 is a high performance waveform generator that combines many powerful functions in one small package.
PXI: A Cost Effective Format
The GX1200/1201 is a sensible alternative to GPIB-based waveform generators when developing a PXI-based test system. The GX1200/1201 provides a synergistic combination of a function generator, arbitrary waveform synthesizer, programmable sequencer, pulse generator, and modulation generator in one instrument. The GX1200/1201 delivers all this at a lower cost than comparable bench-type or VXI-based instruments. This versatility ensures that the GX1200/1201 will adapt to future testing needs as well as current ones.
High Speed Sample Rates
New technology requirements are driving communications systems to use increasingly narrow channel width. With high sample rates of 50 MS/s (GX1200) and 100 MS/s (GX1201), the GX1200/1201 is an ideal modulation source for troubleshooting new encoding schemes. The GX1200/1201 also provides high-speed waveforms to stimulate signal distortion, power line cycle dropouts, video signals, components failures and power supply transients.
2Meg Waveform Memory
The GX1200/1201 provides 2 Meg of waveform memory as standard, far more than competitive models. This waveform memory is accessible via a high-speed interface. Waveform memory is segmentable, allowing the storage of up to 4096 different waveforms rapidly and without having to download multiple times, enhancing test throughput in a way that cannot be duplicated by other competing products.
Sequences of up to 4096 Waveforms
The GX1200/1201's powerful sequencing capabilities allow linkage of up to 4096 waveform segments and/or bursts (repeated segments) into strings. A segment can be repeated up to 128K times in burst mode. Sequenced functions run continuously or are initiated by a trigger. It is also possible to mix continuous and triggered segments within one sequence. These sequencing features permit the creation of complex waveform or pulse patterns using minimal amounts of memory.
Sequences are created by writing a sequence table. Sequence table download is extremely fast because ArbConnection writes to directly to the register and does not require the overhead of an embedded controller.
Flexible triggering Capability
Combining PXI trigger lines with the GX1200/1201 sync capability transforms the GX1200/1201 into an Arbitrary Trigger Generator. In addition to continuous output, the instrument can also wait for a trigger to initiate a single waveform, a burst of waveforms or a sequence of waveforms. Triggers can also be used to advance a sequence of waveforms one segment at a time. The GX1200/1201 accepts the triggers for multiple sources: eight backplane trigger lines plus STAR trigger, front panel trigger input, and manual commands such as *TRG.
ArbConnection Software: Unlimited Source of Arbitrary Waveforms
With the GX1200/1201's ArbConnection software, you can control instruments functions, modes and features. You can create virtually unlimited varieties of test waveforms. Freehand sketch allows you to draw your own custom waveform for quick analysis of analog signals. You can use the built-in equation editor to create your own exotic functions. Add or subtract components of a Fourier series to characterize digital or analog filters or, inject random noise into a signal to test immunity to auxiliary noise.
Sample Clock Agility
The GX1200/1201 has outstanding low phase noise characteristics and carrier stability. Such characteristics are very much needed for telecommunication and channel separation applications. On the other hand, the output of the GX1200/1201 can be made extremely agile for applications needing sweep, FSK and FM. The sample clock of the instrument is derived from a DDS (Direct Digital Synthesis) circuit so controlling instantaneous frequency is a matter of changing its input bits. You, as a user, should not really care how it is done but the end result is magnificent: functions like wide-band FM, wander, linear and logarithmic sweep are easily created and executed by the generator.
A unique and extremely useful feature of ArbConnection is the FM Composer. The FM composer screen looks very much like the Wave Composer screen, except the Y-axis is provided in units of frequency, so waveforms that you create using the FM composer generate frequency change over time. You can create any arbitrary waveform shape or use the equation editor to generate exotic shapes which eventually you can use to frequency modulate your main output.
Arbitrary Waveforms
The GX1200/1201 is also extremely flexible as an Arbitrary Waveform Generator. Combined with the power of ArbConnection, there is no limit to what you can create and generate. Waveform coordinates can be imported from a variety of sources such as MathLab, ASCII files, etc. Anything you can show on one of the composer screens is downloaded in a split second and generated by the main output. Place two or more GX1200/1201's in a chassis and harness the power of multi-instrument synchronization to create multiple, phase-controlled output channels, then vary module-to-module phase offsets to create a multi-phase signal source.
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