Aeroflex 2050 Series Signal Generators - AEROFLEX - #6

Text version of the page

ON/OFF ratio Greater than 80 dB. Envelope delay < 10 ìs, typically 6 ìs. Rise/fall time Less than 13 ìs to –70 dBc. IF OUTPUT An IF output is available on the rear panel which is modulated by the selected digital or vector modulation. The IF output can be inhibited by software control. The IF output can be used to provide modulated carriers at higher frequencies by external frequency conversion. The RF output from the front panel connector can be used as an LO for external frequency conversion. MODULATION OSCILLATOR Frequency range 0.1 Hz to 500 kHz. Selection By keyboard entry of data. Variation by
 keys and by rotary control. Indication 7 digits with annunciators. Resolution 0.1 Hz. Frequency accuracy As frequency standard. Distortion Less than 0.1% THD in sine wave mode at frequencies up to 20 kHz. Alternative waveform A triangular wave is available in addition to the sine wave for frequencies up to 100 kHz. Signaling tones The modulation oscillator can be used to generate sequential (up to 16 tones) or sub-audible signaling tones in accordance with EIA, ZVEI, DZVEI, CCIR, EURO 1, EEA, NATAL and DTMF* standards. Facilities are also available for creating and storing user defined tone systems. * Requires second modulation oscillator (option 001) to be fitted. EXTERNAL MODULATION Two independent inputs on the front panel with BNC connectors, EXT MOD 1 and EXT MOD 2. The modulation is calibrated with 1.414 V peak (1 V RMS sine wave) applied. Input impedance 100 kÙ nominal. MODULATION ALC The EXT MOD 1 and EXT MOD 2 modulation inputs can be levelled by an ALC system. Level Range 1 V to 2 V peak (0.7 to 1.4 V RMS sine wave). Distortion Less than 0.1% additional distortion for frequencies up to 20 kHz (typically less than 0.1% up to 50 kHz). 1 dB Bandwidth Typically 10 Hz to 500 kHz. LF OUTPUT Front panel BNC connector. The output may be configured in the LF Generator Mode to give an output from the internal modulation oscillator and in the LF Monitor Mode to give an output from the internal modulation signal paths. Selection By keyboard entry of data. Variation by
 keys and by rotary control. Indication 7 digits with unit annunciators for frequency and 4 digits with unit annunciators for level. Level 100 ìV to 5 V RMS with a load impedance of greater than 600 Ù. 100 ìV to 1.4 V RMS with a load impedance of greater than 50 Ù. Source impedance 5.6 Ù nominal. Level accuracy at 1 kHz With a load impedance of greater than 10 kW: LF ±5% for levels above 50 mV LF ±10% for levels from 500 ìV to 50 mV. Frequency Response Typically <±1 dB from 0.1 Hz to 300 kHz. SWEEP Control modes Start/stop values of selected parameter. Number of steps. Time per step. Step time 1 ms to 20 s per step. Sweep ramp Synchronized analog ramp with a nominal amplitude of 0 to 10 V peak on rear panel BNC connector. Markers User selectable markers for frequency or level provide an indication when specified parameter values have been reached. Output 0 V to +5 V from 600 Ù on rear panel BNC socket. Trigger Rear panel BNC connector. Applying 0 V or a switch closure starts the sweep. Connector is internally connected via 10 kÙ pull-up resistor to +5 V. FREQUENCY STANDARD (OCXO) Frequency 10 MHz. Temperature stability Better than ±5 in 108 in the operating range of 0 to 50°C. Warm up time Within 2 in 107 final frequency within 10 minutes from switch on at 20°C ambient. Ageing rate Better than 2 in 107 per year. Output Rear panel BNC socket provides an output at frequencies of 1, 5 or 10 MHz with a nominal 2 V pk-pk level into 50 Ù. Output can be dis