DDSPA Direct Digital Synthesizers
Description
Direct Digital Synthesizers models offer high frequency accuracy and stability and extremely fast switching times less than 100ns. They will be preferred to VCOs when high stability and accuracy is necessary. They can be modulated (amplitude) from an analog or digital external signal. The frequency is externally controlled by a digital signal (15 to 31 bits). An external power amplifier will be required to generate the RF power levels required by the AO device.
PHASE LOCKED Versions with 2 inputs (option) : DDS outputs with common Reference for high stability frequency difference
Datasheet (DDSPAxx-d024)Additional information
| Number of Outputs | 1, 2, Custom |
|---|---|
| Frequency range | Associated to AO device, Custom |
| Max RF power(W) | 1, 2.5, 4, 10, 20, Associated to AO device, Custom |
| Modulation Input Control (AM) | 8 bits digital (256 levels), Analog 0-5 / 50 Ω |
| Frequency Modulation input | 15 bits (15.259 KHz), 23 bits (59.6 Hz), 31 bits (0.23 Hz) |
| Phase locked | No, Yes |
| Version (Power supply) | Laboratory 110-230VAC, OEM 24 VDC |
| 0 dBm output | No, Yes |
| Frequency Stability (ppm/°C) | +/- 1 |
| Frequency step / Accuracy | HR: 0.23 Hz (31 bits), LR: 15.259 KHz (15 bits), MR: 59.6 Hz (23 bits) |
| Commutation / sweeping time | ≤ 40 (LR), ≤ 64 (MR), ≤ 80 (HR) |
| Output RF power (dBm) | -30 to 0 (to be associated with AA Amplifier) |
| Power Supply OEM version (24 VDC) | 0.25A |
| Rise Time/Fall time (ns) | <3 @200MHz @analog, < 25 (+typ 25ns conversion for DAC 8 bits) @digital |
| Harmonics (dBc) | H2 > 30, H3 > 20 |
| Input / Output impedance | 50 |
| VSWR | < 1.2/1 |
| Extinction Ratio (dB) | 45 (for F<250MHz), Option High extinction on request |
| Input / Output connectors | HD44 / SMA (OEM) |
| Size / Weight | Lab version: 19”, 2U nom 4 Kgs, OEM: 129 x 61 x 28 mm3 / 275 g |
| Heat Exchange | Conduction through baseplate for OEM version |
| Operating Temperature | 10 to 40 (max Tcase 50, OEM version) |
| Storage Temperature | -40 to +70 non condensing |