HP 8656A Service Manual
Contents
1. 123 5 to 247 MHz fc 247 to 494 MHz fc 494 to 990 MHz fc EM not specified for fe Afpk lt 100kHz Deviations lt 10 kHz Deviations 210 kHz lt 20 kHz peak deviation and internal rates and carrier frequency 2500 kHz At internal rates Add 5 if 250 Hz frequency increments are used 100 Hz to 99 kHz peak deviations and internal rates 1dB bandwidth ac coupled 1 5 General Information Model 8656A Table 1 1 Specifications 3 of 3 Electrical Characteristics Performance Limits Conditions GENERAL Cont d Line Frequency 48 to 66 Hz Power Dissipation 125VA maximum Conducted and Radiated MIL STD 461A VDE 0871 Electromagnetic Interference Net Weight 18 1 kg 40 Ib Dimensions Full Envelope Height 133 mm 5 25in nominal width 425 mm 16 75in nominal Depth 520 mm 20 5in nominal Electrical Characterlstics REMOTE OPERATION HP IB IEEE 488 Capability Conducted and radiated interference is with in the requirements of methods CEO3 and REO2 of MIL STD 461A VDE 0871 and CISPR Publication 11 Induced in a two turn 2 5 cm linch dia meter loop held 2 5 cm linch away from the front surface NOTE For ordering cabinet accessories the module sizes are 51 4H IMW 17D Features Interface Hewlett Packard Interface Bus HP IB HP IB is Hewlett Packard s imple mentation of IEEE Standard 488 and the identical ANSI Standard MC1 1 The Signal Generator s compatibility w2. General Information Model 8656A Table 1 1 Specifications 1 of 3 Electrical Characteristics Performance Limits FREQUENCY Range 100 kHz to 990 MHz Resolution 100 Hz 250 Hz SPECTRAL PURITY Spurious Signals Harmonics Non harmonics Sub harmonics aP 25dBe lt 60 dBc None lt 7 dBm output levels gt 5 kHz from carrier in CW mode Residual Modulation CW Mode AM 0 05 to 15 kHz Post Detection Noise Bandwidth 0 1 to 990 MHz FM lt 15 Hz rms 0 1 to 123 5 MHz 0 3 to 3 kHz Post lt 3 Hz rms 123 5 to 247 MHz Detection Noise lt 6 Hz rms 247 to 494 MHz Bandwidth lt 15 Hz rms 494 to 990 MHz FM lt 30 Hz 0 1 to 123 5 MHz 0 05to 15 kHz Post lt 8 Hz 123 5 to 247 MHz Detection Noise lt 16 Hz 247 to 494 MHz Bandwidth lt 30 Hz 494 to 990 MHz OUTPUT Level Range 13 dBm to 127 dBm Resolution 0 1 dB Absolute Level Accuracy lt 1 5 dB Into 50 ohms Output levels of 13 dBm to 127 dBm fre quencies from 100 kHz to 990 MHz Level Flatness lt 1 0 dB Output level setting of 0 0 dBm frequen cies from 100 kHz to 990 MHz AMPLITUDE MODULATION Depth 0 to 99 Output levels of 7 dBm and below fre quencies from 100 kHz to 990 MHz 0 to 30 Output levels of 10 dBm and below fre quencies from 100 kHz to 990 MHz Resolution 1 Incidental Phase lt 0 3radian peak 30 AM depth and internal rates
3. Modulation Absolute level accuracy includes allowances for detector linearity temperature flatness attenuator accuracy and measurement error AM depth is further limited by the Indicator Accuracy specification 1 4 Model 8656A Electrical Characteristics AMPLITUDE MODULATION Cont d Indicator Accuracy AM Rates Internal External AM Distortion internal rates FM MODULATION Maximum Peak Devia tion Afpk 3 Rates gt 60 Hz Rates lt 60 Hz Resolution Incidental AM Indicator Accuracy FM Distortion Total Harmonic Distortion FM Rates Internal External GENERAL Operating Temperature Range Power Requirements Line Voltage General Information Table 1 1 Specifications 2 of3 2 4 of reading 400 and 1 kHz 23 25 Hz to 25 kHz lt 1 5 lt 3 lt 5 99 kHz 25 kHz 50 kHz 99 kHz 1600 x Rate 400 x Rate 800 x Rate 1600 x Rate 0 1 kHz 1kHz lt 0 1 5 of reading lt 0 5 400 and 1 kHz 3 25 Hz to 25 kHz 0 to 55 C 100 120 220 or 240 Vac 5 10 AM depth is further limited by the Indicator Accuracy specification FM deviation is further limited by the Indicator Accuracy specification Performance Limits Conditlons Depths lt 90 and internal rates 1dB bandwidth ac coupled 0 to 30 AM 31 to 70 AM 71 to 90 AM 0 1 to 123 5 MHz fc 123 5 to 247 MHz fc 247 to 494 MHz fc 494 to 990 MHz fc 0 1 to 123 5 MHz fc
4. ith HP IB is defined by the follow ing list of interface functions SHO AHI TO L2 SRO RL1 PPO DC1 DTO and CO Functions Controlled All functions controlled from the front panel with the exception of DIS PLAY DISPLAY in conjunction with SEQ Backspace COARSE TUNE FINE TUNE and display HP IB ADRS are programmable with the same accuracy and resolution as in local operation
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