Advantex AVM4


  • High output power
  • Wide I/Q bandwidth
  • Precise output level control
  • Output filtering
  • Adjustment of LO suppression
  • Small size
  • Low cost

Advantex AVM4 100 MHz - 4 GHz Quadrature Modulator is is designed to generate a modulated signal at the carrier frequency. It can be applied in testing and debugging of digital communication receivers, as well as for digital modulators which form complex I/Q-signal for later transfer to the carrier frequency.

Figure 1 shows the block diagram of quadrature modulator, the main block of the instrument. Signal from the LO input is fed to the phase-shifter, one output of which is shifted by +45° and multiplied by the signal from the I input, the other shifted by −45°, – multiplied from the Q input. Then these signals are added and fed to the filter block, which suppress the LO products, i.e. 2fLO, 3fLO, etc. The resulting signal is fed to the APC (Automatic Power Control) block, then – to the RF Out output.

The instrument has USB and RS-232 interfaces for SCPI remote control and firmware updating capability.

  • Output frequency range: 100 MHz – 4 GHz
  • I/Q bandwidth: DC - 500 MHz
  • I/Q input level (typ.): 0.8 Vpp @ 50Ω
  • I/Q sideband suppression (calibrated): −40..−60 dB
  • Output P1dB: +20 dBm
  • Output level range: −30..+20 dBm
  • Absolute level accuracy (typ.): ±0.2 dB
  • Output level resolution: 0.05 dB
  • Output IP3: +27 dBm
  • Noise floor: −120 dBm/Hz @ POUT=0 dBm
  • Input LO level: −10..+10 dBm
  • LO suppression (calibrated): −60 dBm
  • Remote control: RS-232, USB
  • Command set: SCPI
  • Dimensions: H x W x D: 2U x 42HP(½ 19”) x 315 mm
2012年9月28日 上午7:24
2012年9月16日 下午8:58