仪器简介：
Tektronix 2712 频谱仪内建频率计, 完全的编程能力, 数字和真实模拟显示, 108个或更多的显示存储.
人性化设计，操作简便，实时时钟年月日可直接合并波形一起打印.

仪器参数：
频率范围 - 9 kHz to 1800 MHz
中心频率精度 -
    2712: 5×10-7 of CF ±700 Hz
    2711: 1×10-5 of CF ±5 kHz
频率计数器精度 (Std. 2712, Opt. 02 2711) -
    2712: 5×10-7 of CF ±10 Hz, ±1 LSB
    2711: 1×10-5 of CF ±10 Hz, ±1 LSB
点光标频率精度*1 - CF Accuracy ±3% of span
Long-term Drift*1 -
    2712: 2 ppm/yr
    2711: 10 ppm/yr
Short-term Drift -
    2712: ≤400 Hz maximum drift between correction cycles
    2711: ≤20 kHz maximum drift between correction cycles
Residual FM -
    2712: ≤100 Hz pk-pk/20 msec at ≤20 kHz span/div; ≤2 kHz pk-pk/20 msec at >20 kHz span/div
    2711: ≤2 kHz pk-pk/20 msec
Resolution Bandwidth (-6 dB) -
    2712: 5 MHz, 300 kHz, 30 kHz, 3 kHz, 300 Hz
    2711: 5 MHz, 300 kHz, 30 kHz, 3 kHz
    2712 with Opt. 14: Add 1 MHz, 100 kHz, 10 kHz, and 1 kHz
    2712 with Opt. 12: Add 1 MHz, 120 kHz, 9 kHz, 1 kHz - 200 Hz replaces 300 Hz filter
Resolution Bandwidth Shape Factor (60 dB/6 dB) - ≤7:1 for RBW ≤1 MHz
Noise Sidebands - ≤70 dBc at 30 × RBW
视频滤波 -
    Approx. 1/100 (Auto) of RBW
    Manual Selection: 3 Hz to 300 kHz in 1-3 sequence
Freq. Span/Div. Range -
    2712: 180 MHz to 1 kHz
    2711: 180 MHz to 10 kHz selected in 1-2-5 sequence or within two significant digits through a menu
Span Accuracy - ±3% over the center eight divisions
Amplitude Related
平坦度 - ±1.5 dB measured with 10 dB internal RF attenuation (preamp off).
垂直显示模式 - 10, 5, 1 dB/div, Linear.
测量范围 -
    2712: -139 (preamp on) to +20 dBm (-92 to +67 dBmV).
    2711: -129 (preamp on) to +20 dBm (-82 to +67 dBmV).
显示动态范围 - 80 dB max (limited to 40 dB in optional 2712 Quasi-Peak Detector mode).
参考电平范围 -
    LOG Mode: -70 to +20 dBm (-23 to +67 dBmV), or to -90 dBm with preamp on.
    LINEAR Mode: 8.8 µV to 280 mV.
参考电平步进 -
    LOG Mode: 1 dB or 10 dB.
    LINEAR Mode: 1-2-5 sequence.
Mixer Input Level - Automatically controlled by instrument for on-screen signals. Level selectable between -20 to -50 dBm (+27 to -3 dBmV).
幅度显示精度 -
    10 dB/div: ±1.0 dB/10 dB to max. cum. error of ±2 dB over 70 dB range; ±2.0 dB/10 dB over 70-80 dB range.
    5 dB/div: ±1.0 dB/10 dB to max. cum. error of ±2 dB over 40 dB range.
    1 dB/div: 1 dB max. error over 8 dB range.
    Linear Mode: ±5% of full scale.
衰减器范围 - 0 to 50 dB, 2 dB steps.
灵敏度 -
    2712: -127 dBm (-80 dBmV) at 300 Hz RBW, -139 dBm (-92 dBmV) at 300 Hz RBW with preamp on (to 600 MHz).
    2711: -117 dBm (-70 dBmV) at 3 kHz RBW, -129 dBm (-82 dBmV) at 3 kHz RBW with preamp on (to 600 MHz).
Spurious Response (Preamp Off)
    Residual Spurious Response - ≤-100 dBm referenced to input of 1st mixer
    3rd Order IM Distortion - ≤-70 dBc, from any two on-screen signals within any frequency span measured with 1st mixer input level of ≤-30 dBm (+17 dBmV)
    2nd Harmonic Distortion - ≤-66 dBc measured with 1st mixer input level of ≤-40 dBm (+7 dBmV)
Input Related
    LO Emission - ≤-70 dBm with 0 dB RF attenuation
    RF Input - Type-N connector, 50 ohm
    VSWR with 10 dB or More RF Attenuation - 1.5:1 max
    Maximum Safe Input - +20 dBm (+67 dBmV) (0.1 W) continuous peak with 0 dB RF attenuation; 100 V DC (initially applied with full attenuation)
    1 dB Compression Point - ≥-15 dBm (+32 dBmV) with 0 dB RF attenuation
Sweep Related
扫描时间 - 1 µsec to 2 sec/div in 1-2-5 seq. (7-decade range); AUTO SWEEP mode; MANUAL SWEEP select
扫描时间精度 - ±10% over the center eight divisions
触发 - Free run, internal, external, line, TV field, TV line, single sweep, manual scan
触发幅度 -
    Internal: One division or more of signal
    External: Min. 1.0 V peak, (15 Hz to 1 MHz)
Input/Output Characteristics
外接触发*1 -
BNC connector, 10 kilohm impedance, DC coupled 0.1 µs min.
Pulse width: 35 V max.
外接视频输入*1 -
DC coupled. 0-50 kHz, 0-1.4 V (175 mV/div typical) signal input for vertical deflection of CRT beam.
扫描闸门输出 - TTL level, HI while CRT beam sweeps.
扫描输出 - +1.3 to -1.3 V, negative-going ramp, proportional to the horizontal sweep. Source impedance ≤50 ohm.
视频输出 - 0 to +1.6 V of video signal, proportional to vertical display amplitude. 0 V is top of screen. 1 kilohm impedance.
Other Capabilities
光标 - Single marker/delta marker; next right, next left peaks; next lower, next higher peaks; (highest) peak find; marker to center frequency and reference level.
非易失性存储器 -
    Lithium battery backup.
    2712: 124 KB available; up to 108 displays saved; 36 front-panel setups, large user-definable key routines, and antenna tables (exact number and size depends on NV RAM utilization).
    2711: 28 KB available; up to 18*2 displays saved and 9*2 front-panel setups, user-definable key routines, and antenna tables.
数字化存储显示 - Selectable acquisition modes of positive peak only, positive/negative peak. SAVE A, B, C, and active D trace; up to four traces on screen; MAX HOLD A, B; MIN HOLD A, B, C; B, C MINUS A; WATERFALL display mode; digital storage off provides analog sweep.
Ensemble Averaging - Provides weighted continuous or discrete averaging of display resulting in reduction of random noise.
Internal Preamp - Preamp can be switched in/out of circuit (flatness degrades above 600 MHz, provides approximately 12 dB sensitivity improvement).
Alternative Reference Level Units - dBm, dBmV, dBV, dBµV, dBµW, dBµV/m.
电源 - 105 W max. (1.4 A) at 115 V, 60 Hz. Operates 48 Hz to 440 Hz, 90 to 132 V AC, or 48 Hz to 63 Hz to 250 V AC. Battery power (Opt. 07) available.

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