| 7225/7225BFP | 7265 |
| Input | 
 |  |
| Voltage | | |
| Mode | A only -B only or Differential | A only -B only or Differential |
| Sensitivity | 2 nV to 1 V | 2 nV to 1 V |
| Impedance | | |
| FET Device | 10 MW // 30 pF | 10 MW //30 pF |
| | Bipolar Device | 10 kW // 30 pF | 10 kW // 30 pF |
| Noise | | |
| | FET Device | 5 nV/?/font>Hz at 1 kHz | 5 nV/?/font>Hz at 1 kHz |
| | Bipolar Device | 2 nV/?/font>Hz at 1 kHz | 2 nV/?/font>Hz at 1 kHz |
| C.M.R.R. | > 100 dB at 1 kHz | > 100 dB at 1 kHz |
| Gain Accuracy | 0.2% typ (full bandwidth) | 0.2% typ (full bandwidth) |
| Line Filter | attenuates 50 60 100 120 Hz | attenuates 50 60 100 120 Hz |
| Current | | |
| Mode | Low-noise or Wideband | Low-noise or Wideband |
| Sensitivity | | |
| Low Noise | 2 fA to 10 nA | 2 fA to 10 nA |
| Wideband | 2 fA to 1 礎 | 2 fA to 1 礎 |
| Impedance | | |
| Low Noise | < 2.5 kW | < 2.5 kW |
| Wideband | < 250 W | < 250 W |
| Noise | | |
| Low Noise | 13 fA/?/font>Hz | 13 fA/?/font>Hz |
| Wideband | 130 fA/?/font>Hz | 130 fA/?/font>Hz |
| Gain Accuracy | | |
| Low Noise | ?/font> 0.6% typ (midband) | ?/font> 0.6% typ (midband) |
| Wideband | ?/font> 0.6% typ (midband) | ?/font> 0.6% typ (midband) |
| Dynamic Reserve | > 100 dB | > 100 dB |
| Frequency Response | 1 mHz to 120 kHz | 1 mHz to 250 kHz |
| Detection Modes | | |
| Phases | 2 | 2 |
| Harmonic | nF (nF < 250 kHz n < 32) | nF (nF < 250 kHz n < 65536) |
| Dual Harmonic | N/A | Detects and measures two different harmonics simultaneously
(F1 and F2 < 20 kHz) |
| Dual Reference | N/A | Detects and measures at two different reference frequencies simultaneously (F1 and F2 < 20 kHz) |
| Virtual Reference™ | N/A | Detects a signal without a reference
(100 Hz ?/font> F ?/font> 60 kHz) |
| Spectral Display | N/A | Computes and displays graphically the input signal power spectral density at frequencies up to 60 kHz |
| Noise | Measures noise in a given bandwidth centered on frequency F | Measures noise in a given bandwidth centered on frequency F |
| Output | | |
| Fast outputs | | |
| Time constant | 10 祍 to 640 祍 | 10 祍 to 640 祍 |
| Outputs available | X & Y | X & Y or X & MAG |
| Voltage for 眆ull-scale input | ?.5 V linear to ?00% f.s. | ?.5 V linear to ?00% f.s. |
| Impedance | 1 kW | 1 kW |
| Update Rate | 166 kHz | 166 kHz |
| Roll-off | 6 dB/octave | 6 dB/octave |
| Other Outputs | | |
| Time constant | 5 ms to 100 ks | 5 ms to 100 ks |
| Outputs available | X Y R q Noise | X Y R q Noise Ratio Log Ratio |
| Voltage for 眆ull-scale input | ?0.0 V linear to ?10% f.s. | ?0.0 V linear to ?10 f.s. |
| Impedance | 1 kW | 1 kW |
| Update Rate | 200 Hz | 200 Hz |
| Roll-off | 6 12 18 and 24 dB/octave | 6 12 18 and 24 dB/octave |
| Oscillator | | |
| Amplitude Range | 1 mV to 5 V | 1 礦 to 5 V |
| Amplitude Sweep | Linear: computer control only | Linear: manual or computer control |
| Amplitude Resolution | | |
| 1 礦 to 4 mV | N/A | 1 礦 |
| 1 mV to 4 mV | 1 mV | N/A |
| 4 mV to 500 mV | 1 mV | 125 礦 |
| 501 mV to 2 V | 4 mV | 500 礦 |
| 2.001 V to 5 V | 10 mV | 1.25 mV |
| Frequency Range | 1 mHz to 120 kHz | 1 mHz to 250 kHz |
| Frequency Sweep | Linear or Logarithmic: computer control only | Linear or Logarithmic: manual or computer control |
| Impedance | 50 W | 50 W |
| Auxiliary Control | 2 ADC & 2 DAC with ? mV resolution ?0 mV accuracy in ?0 V 8 logic lines | 3 ADC & 4 DAC with ? mV resolution ?0 mV accuracy in ?0 V 8 logic lines |
| Data Buffer | 32k 16-bit data points | 32k 16-bit data points |
| Interface | RS232 GPIB (IEEE-488).
A second RS232 is provided for "daisy-chain" connection of up to sixteen compatible instruments | RS232 GPIB (IEEE-488).
A second RS232 is provided for "daisy-chain" connection of up to sixteen compatible instruments |
