Watkins-Johnson_HF-1000A_broch_1996.pdf

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1、Features JFrequency coverage from 5 kHz to 30 MHz in 1-Hz steps JHigh dynamic range: +30 dBm 3rd-order intercept typical JDigital filtering provides 58 IFBWs from 56 Hz to 8.0 kHz with exceptional shape factors JAM, Synchronous AM, FM, CW, USB, LSB automatically switches to external reference upon a

2、pplication of signal Tuning Time. 25 msec typical from receipt of terminating character to within 1 kHz (measured at IF out, 6 kHz IFBW selected) Scan Rate. Memory Channel scan 20 CH/sec F1- F2 sweep 50 CH/sec Antenna Input Impedance. 50 ohms, nominal VSWR. 2:1, max at receivers tuned frequency Maxi

3、mum Input Signal . +30 dBm Connector. BNC, female 3rd- Order Intercept Point. +30 dBm, typical + 25 dBm, min (for signals separated by 20 kHz, minimum) 2nd- Order Intercept Point. +60 dBm, typical Noise Figure. 14 dB, max (11 dB, max with preamplifier engaged) Detection Modes. AM, Synchronous AM, FM

4、, CW, USB, LSB inverted; 1- kHz steps Bandwidth. 8 kHz (- 6dB), nominal Output Level . 30 dB above RF input, nominal Output Impedance. 50 ohms, nominal Connector Type. BNC, female Gain Control Modes. Manual, or AGC Fast, Med & Slow AGC Range . 100 dB, min AGC Threshold . Approximately - 112 dBm (0.5

5、6 V) in 6- kHz bandwidth Approximately - 125 dBm (0.12 V) in 300- Hz bandwidth (Threshold matched with IFBW, typically 10 dB above noise floor) Specifications 7 HF- 1000A AGC Attack Time .5 msec, typical AGC Decay Time.Fast: 10 to 100 ms, variable Med: 100 ms to 1s, variable Slow: 1s to 5s, variable

6、 Manual Gain Control Range .100 dB Selectable Front- End Gain/Attenuation Preamplifier Gain .10 dB (+2 dB) Attenuation.15 dB (+2 dB) BFO Tuning Range .+8000 Hz Tuning Resolution.10 Hz First Image Rejection.90 dB, min IF Rejection.85 dB, min (90 dB, typical) LO Phase Noise.- 110 dBc at 1- kHz offset,

7、 typical Reciprocal Mixing.With a desired signal of 25 V in the 3.2- kHz IFBW, the desired signal- to- noise ratio (SNR) is 20 dB, when an undesired signal 70- dB higher in amplitude and 35- kHz removed in frequency is present. Cross Modulation.With a desired signal of 10 V, an undesired signal 86-

8、dB higher, 30% AM modulated produces 50 kHz in the 1- kHz IF IFBW. Internal Spurious.- 114 dBm referred to the RF input Blocking.An unwanted signal 1 V separated 20 kHz from a desired signal of 1 V does not cause the IF output to fall by more than 3 dB. Line Audio Outputs Number of Outputs .2 (cente

9、r- tapped, balanced) ISB mode: USB & LSB on separate outputs All other modes: audio signal common to both outputs Output Level .0 dBm, nominal into 600- ohm load Connector Type .Screw terminals Speaker Output Number of Outputs .1 ISB mode: USB & LSB selected individually or combined Internal speaker optional Bandwidth .100 Hz to 13 kHz Output Level .Adjustable up to 1 W into 8- ohm load Total Harmonic Distortion .10,000 hours Power Requirements . 97 to 253 Vac (47 to 440 Hz) Power Consumption . 35 W, typical with options