Harmonic distortion performance of the MAX3510 cable upstream amplifier with a maximum frequency of 55MHz
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More information: Wireless product webpage quick browsing MAX3510 data application technical support
Objective: To complete a complete set of harmonic distortion tests for the MAX3510, from 15MHz to 55MHz (extended frequency band).
We successfully conducted a full set of single-tone and double-tone tests for the third-harmonic distortion of the MAX3510 amplifier. The center frequency of the test signal is 15MHz, 25MHz, 35MHz, 45MHz and 55MHz. The VCC variation range is from 4.50 to 5.00VDC, and the VCC target variation range in use is 4.75 to 5.00VDC. The test target is that IMD or single tone harmonics do not exceed -46dBc.
Single tone harmonic distortion is measured at + 59dBmV output and fully meets the requirements. The 4.5V VCC with low energy consumption is used and the performance is degraded at the highest frequency and highest gain.
The dual audio test limit conditions are met at + 56dBmV per audio output. The input value varies from 34dBmV (ie -13dBm) to 27dBmV (ie -20dBm) while the output remains constant. When VCC is 4.50 and the gain is at its highest, the performance is reduced.
MAX3510 is a controllable power amplifier for CATV upstream (such as cable modem). It outputs a signal of 64dBmV (continuous wave) through a 2: 1 (voltage ratio) converter and can operate in the frequency range of 5MHz to 65MHz. It uses a 3-wire digital serial bus for variable gain control, with gain control taking 1dB as a step. Other features include: extremely short power switching time, low emission output noise floor, low output noise when emission is prohibited, and two low-power modes.
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