The BNC Model 625A (SG-100A/Telulex) represents a major breakthrough in price/performance for signal generation and signal measurements and analysis. This versatile device allows the engineer to access a broad range of operating modes such as arbitrary waveform, pulse, word/data integration, function, VCO, AM, FM, SSB, FSK, and burst.
The BNC 625A is much more than a a signal generator: Never before has so much versatility, capability, and performance been packed into a single-low cost instrument. Its architecture is based on the latest advances in DSP and DDS technology which not only ensures calibrated and drift free performance, but also gives the engineer signal measurement and analysis functions such as voltage/power measurement and DTMF detection.
The BNC 625A delivers clean, fully synthesized, DC to 21.5 MHz modulated or unmodulated waveforms with ) 0.01 Hz frequency resolution and 1mV and 0.1 dBm amplitude resolution. User friendly features include a large, easy-to read LCD display which allows the user to see all modulation parameters simultaneously. A full numeric keypad and encoder provides direct editing of each parameter, without confusing sub-menus.
Areas of application include: medicine, education, communications, photonics, circuit design, power systems, and consumer electronics.
Specifications | Operating | Modes | Arbitrary Waveform | Generator | Function | Generator | Pulse | Generator | Applications |

| Main Output |
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Frequency: |
DC to 21.5000000 MHz, 0.01 Hz steps |
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Level: |
2 mV p-p to 10.000 V p-p, 1 mV steps (into 50ohms) or -50.0 dBm to +18.0 dBm, 0.1 dBm steps (into 50ohms) |
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Level Accuracy: |
±1% |
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Flatness: |
± 0.2 dB (DC-20 MHz) |
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DC offset: |
0 V to ± 10 V, 1 mV steps (into 50 ohms) |
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Output impedance: |
50 ohms |
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Freq. Accuracy: |
±10 ppm (±5ppm optional) |
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Spectral Purity: |
DC to 100 kHz: ..................>-50 dBc
100 kHz to 1 MHz.............>-45 dBc
1 MHz to 12 MHz...............>-40 dBc
12 MHz to 20 MHz..............>-35 dBc |
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| Ext. Trigger/Gating/FSK/BPSK input |
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Input impedance: |
80 ohms |
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Max. Input Level: |
±10 V |
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Max. gating freq: |
3 MHz |
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| SYNC Output |
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Amplitude: |
0 V to +5 V (TTL/CMOS compatible) |
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Rise/Fall Time: |
Rise: < 8 ns; Fall: < 3 ns |
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Output current: |
± 24 mA |
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| RS232 port |
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Asynchronous, no parity, 1 start bit, 1 stop bit. |
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Baud Rate: |
Programmable, 300bps to 115.200 bps |
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Remote operation from a terminal or host computer |
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| External Modulation Input |
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Maximum full scale input: |
±5 V (10 V p-p) |
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Input Impedance: |
30 kohms |
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| General |
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Power: |
100-240 VAC, 47-63 Hz, 30W, 3 prong IEC connector |
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Display: |
2 line by 40 character, LCD, backlight |
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Weight |
Approx. 3.5 lbs. |
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Dimensions: |
5.1" x 9.3" x 10.2" (H x W x L) |
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Operating Temperature: |
0 to 40 deg. C ambient |
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| Operating Modes |
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| The carrier frequency for all modulation is 0 Hz to 21.5000000 MHz, 0.01 Hz steps |
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| Basic Sinewave (CW) Mode |
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Output frequency: |
0 Hz to 21.5 MHz, 0.01 Hz steps |
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| Frequency Modulation (FM) Mode |
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Int. modulation freq: |
0 Hz to 10 kHZ, 1 Hz steps |
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Ext. modulation freq: |
DC to 35 kHZ |
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Peak frequency deviation: |
0 Hz to ± 5.0 MHz, 1 Hz steps |
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| Phase Modulation (PM) Mode |
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Int. modulation freq: |
0 Hz to 10 kHZ, 1 Hz steps |
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Ext. modulation freq: |
DC to 35 kHZ |
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Peak phase deviation: |
0 to ± 180 deg., 1 deg. steps |
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| Sweep Mode |
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Start/Stop freq: |
0 Hz to 21.5 MHz, 0.01 Hz steps |
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Linear or log sweep. Up or Down sweep direction |
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Free Run or Triggered sweep (Int/Ext) |
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Sweep time: |
1 ms to 60 s 1 ms steps. |
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| Burst Mode |
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Trigger: |
Continuous or triggered from front panel, RS232 or Ext Trig |
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Duration: |
1 ms to 99.999 s, 1 ms steps |
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Delay: |
0 ms to 99.999 s, 1 ms steps |
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| Dual Tone Multi Frequency (DTMF) Generate Mode |
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Dialing digits generated: |
0 to 9, #, *, A, B, C, D |
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Duration: |
1 ms to 10.000 s, 1 ms steps |
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Delay: |
0 ms to 10.000 s, 1 ms steps |
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| Custom Dual Tone Generate Mode |
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Tone 1, Tone 2 Frequency: |
DC to 10.000 kHZ, 1 Hz steps |
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Phase Offset: |
0 deg. to 359 deg., 1 deg. steps |
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Output ON time: |
Cont. or 1 ms to 10.000 s, 1 ms steps |
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Output OFF time: |
0 ms to 10.000 s, 1 ms steps> |
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| Voltage Controlled Oscillator (VCO) Mode |
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Endpoint Frequencies: |
0 Hz to 21.5000000 MHz in 0.01 Hz steps |
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Control input range: |
± 5.0V |
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Control signal bandwidth: |
DC to 35 kHZ |
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| Amplitude Modulation (AM) Mode |
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Int. modulation freq: |
0 Hz to 10 kHZ, 1 Hz steps |
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Ext. modulation freq: |
DC to 35 kHZM |
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Percentage modulation: |
Variable 0% to 100%, 1% steps |
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| Single Sideband (SSB) Mode |
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Int. modulation freq: |
0 Hz to 5 MHz, 1 Hz steps |
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Ext. modulation freq: |
DC to 8500 Hz |
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Upper or Lower Sideband selectable |
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| Frequency Shift Keying (FSK) Mode |
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Int. modulation freq: |
0 Hz to 130 kHZ, 1 Hz steps |
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Ext. modulation freq: |
0 Hz to 3 MHz |
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Mark/Space freqs: |
0 Hz to 21.5 MHz, 0.01 Hz steps |
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| Power & Voltage Measurement Mode |
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Input signal range: |
± 5 V |
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Input signal bandwidth: |
DC to 50 kHZ |
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Power calc. impedance: |
Variable from 1 to 999 ohms |
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| Binary Phase Shift Keying (BPSK) Mode |
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Int. modulation freq: |
0 Hz to 130 kHZ, 1 Hz steps |
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Ext. modulation freq: |
0 Hz to 10 kHZ |
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| Dual Tone Multi Frequency (DTMF) Detect Mode |
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DTMF digits detected: |
0 to 9, #, *, A, B, C, D |
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Detection range: |
10 Vp-p max., 20 mVp-p min. |
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Detection time: |
100 ms |
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| Other Modes |
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New modes are constantly being added. They can be obtained via www, email, or floppy disk and downloaded to the BNC 625. Please check periodically for availability. |
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| Data Modulation Mode |
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Message Date Length: |
1 to 960 bits> |
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Baud Rate: |
1 Hz to 130 kHZ in 1 Hz steps |
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Mark/Space freqs: |
0 Hz to 21.5000000 MHz in 0.01 Hz steps |
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Trigger: |
External, Keypress, or RS232 |
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Message Nonvolatile Storage: |
10 locations |
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The Arbitrary Waveform Generator allows you to design custom waveforms on your personal computer and download them to the BNC 625A which generates them in real-time. Arbitrary Waveforms may either be designed with a graphical Windows-based design tool or be generated point-by-point in a variety of data formats from your own application software. A data generator program, example waveforms, and a downloading utility are included in this option.
The Model 625A generates every data point independent of repetition rate. Normally ARB's simply replace the sinewave lookup table used in the DDS system with arbitrary waveform datapoints. With this method waveform points are actually skipped as the rest as the rep rate is increased. Our unique design ensures you maintain the characteristics of your wave form.
The TTL/CMOS SYNC output can be independently controlled which lets you create a pattern of logic pulses along with your analog waveform. This output swings 0V to +5V and can be directly drive digital logic. It is useful for designing arbitrary digital waveforms or generating a triggering or synchronizing pulse along with the analog waveform.
The BNC 625A will receive and parse waveform data in a multitude of formats. No confusing protocols or headers are required, and the data may be separated by any non digit character (carriage returns, commas, tabs, spaces, etc.), which makes it easy to download data from a variety of application programs, spreadsheets, and sampling oscilloscopes.

| Vertical Resolution: |
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12 bits |
| Sample Update Rate: |
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Variable from 0 Hz to 40 Msamples/s in 0.01 Hz steps. |
| Sample Buffer Depth: |
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32,768 datapoints |
| Run Mode |
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Continuous or Internal/External Triggered |
| Data Formats: |
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Floating Point, Decimal, Hexadecimal, Integer, Binary, .CSV and .PRN formats. |

The function generator offers a set of pre-stored waveforms which are generated using the Arbitrary Waveform hardware. The user may quickly select from many stored waveforms, and may also specify a repetition rate to 2 MHz. All functions may be generated on a continuous or triggered basis. A high going synchronizing pulse is a given on the SYNC Output at the start of each waveform.

| Waveforms: |
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Positive ramp, Negative Ramp, Triangle, Positive Exponential, Inverted Positive
Exponential, Negative Exponential, Inverted Negative Exponential, Random (noise) |
| Repetition Rate: |
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0 Hz to 2 MHz in 1 Hz steps, all functions |
| Run Mode: |
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Continuous or Internal/External Triggered |
| Output level: |
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8 mVp-p to 20 Vp-p unloaded or 4mVp-p to 10Vp-p into 50 ohms |

The Pulse Generator allows the user to generate pulse waveforms with adjustable amplitude, offset, frequency and duty cycle. The pulse may be generated on a continuous or triggered basis.

| Frequency: |
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0 Hz to 2 MHz in 1 Hz steps |
| Duty Cycle: |
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Variable 0% to 100% in 1%steps |
| Output: |
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Variable in amp. and offset. A TTL/CMOS compatible Synch Out is simultaneously provided. |

| Audio |
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Video |
Sound Cards, PC computer sound
Stereo equipment developers
Synthesizer applications
Musical equipment developers |
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Video compression algorithm development
Video amplifiers and processing circuitry |
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| DSP |
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Power systems Engineering |
Modem developers
Voice Compression
Video Compression
Filter characterization
Music Synthesis
Noise analysis
Correlated receivers |
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Multi phase grid simulation
Arbitrary waveform generation |
| Telephony |
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Consumer Electronics |
Modem development
Voicemail & Answering Machine
PBX
Fax equipment
Caller ID
Basically any device connecting to a phone line |
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Infrared Communications
Ultrasonic products
surity electronics, motion sensors, etc.
Pager testing |
| RF Engineering |
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Ham Radio Enthusiasts |
IF amplifier testing
AGC testing
Filter characterization
Precise Local Oscillator (LO) injection
Demodulator testing and characterization
Loran C product development
Testing of messaging & packet radio receivers |
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Autopatch Development
SSB radio transmitter
HF band radio transmitter
SSB demodulator BFO
Radio circuitry development and testing
Packet radio implementation |
| Digital Engineers |
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Crystal replacement
Clock Oscillator replacement
Clock "dithering"
Digital Phase Lock Loop (DPLL) testing
Signal generation for sensor and digital I/O |
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Medical
The Arbitrary Waveform Generator will simulate the outputs from biological and medical sensors. With a digital storage oscilloscope one can capture a sensed signal and download it for regeneration by the Model 625A. The various operating modes of the 625A provide many useful stimuli, gating, and timing signals for recording, monitoring, and testing functions.
Educational
The Model 625A provides AM, FM, SSB, FSK, and other signals for instruction and laboratory environments. The VCO, pulse and word generator, and DTMF modes are among the many useful functions for the classroom and teaching lab.
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