Aeroflex 2050 Series Signal Generators - AEROFLEX - #4

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Accuracy at 1 kHz ±5% of indication ±10 Hz excluding residual FM. Bandwidth (1 dB) DC to 300 kHz (DC coupled). 10 Hz to 300 kHz (AC coupled). Input is capable of accepting external sources of FSK signals. Typical 3 dB bandwidth is >1 MHz. Group delay Less than 1 ìs from 3 kHz to 500 kHz. Carrier Frequency Offset In DC FM less than ± (1 Hz + 0.1% of set deviation) after using DC FM nulling facility. Distortion Using external modulation without ALC: Less than 3% at maximum deviation for modulation frequencies up to 20 kHz. Less than 0.3% at 10% of maximum deviation for modulation frequencies up to 20 kHz. Modulation source Internal LF generator or external via front panel sockets. WIDEBAND FM Deviation As FM. Indication 3 digits with annunciators. Selection By keyboard entry of data. The sensitivity is controlled in 3 dB steps and the display will indicate the nearest value of deviation to that requested. Input level 1.414 V peak (1 V RMS sine wave) to achieve indicated deviation. Accuracy As FM. 3 dB Bandwidth Typically 10 MHz (DC or AC coupled). Group Delay Less than 0.5 ms from 3 kHz to 10 MHz. Modulation Source External via rear panel socket (50 Ù impedance). PHASE MODULATION Deviation 0 to 10 radians. Selection By keyboard entry of data. Variation by up/down keys (or
) and by rotary control. Indication 3 digits with annunciators. Resolution 0.01 radians. Accuracy at 1 kHz ±5% of indicated deviation excluding residual phase modulation. 3 dB Bandwidth 100 Hz to 10 kHz. Distortion Less than 3% at maximum deviation at 1 kHz modulation rate. Modulation Source Internal LF generator or external via front panel sockets. AMPLITUDE MODULATION For carrier frequencies up to 1 GHz. Range 0 to 99.9%. Selection By keyboard entry of data. Variation by up/down keys (or
) and by rotary control. Indication 3 digits with annunciator. Resolution 0.1%. Accuracy ±4% of setting ±1%. 1 dB Bandwidth With modulation ALC off; DC to 30 kHz in DC coupled mode and 10 Hz to 30 kHz in AC coupled mode. Typical modulation bandwidth exceeds 50 kHz. Distortion For a modulation rate of 1 kHz: Less than 1% total harmonic distortion for depths up to 30%, less than 3% total harmonic distortion for depths up to 80%. Modulation source Internal LF generator or external via front panel connectors. DIGITAL MODULATION In digital mode the instrument can be used over the carrier frequency range 10 MHz to 1.35/2.7 GHz and accepts internal or external data to modulate the RF output. The modulation can be applied in common digital formats and the channel filter characteristics specified. Internal Data All 0’s, 1’s or selectable PN 2 to 7, 9, 10, 11 or 15 PRBS sequence. Note with GSM selected PRBS is limited to PN9 & 15. All 0’s and all 1’s are available. External data Accepts data as a serial input or parallel input from a 25 way auxiliary D Type connector on the rear panel. Accepts symbols containing 1 to 8 data bits with internally or externally generated clock sources. All inputs and outputs are TTL/CMOS logic compatible. Note, in GSM mode, external data must be supplied as 8 bit parallel.