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Farnell Instruments SSG 520 Generator
Manufacturer:
Model:
SSG 520
Date:
1981
Class:
Type:
SubType:
SYNTHESIZED SIGNAL GENERATOR
Information
The SSG520 is a very easy to use Synthesizer with an output range of 10— 520MHz and provides full signal Generator facilities. The r.f. performance is very good with particularly low leakage levels enabling accurate output level settings to be obtained and the high stability synthesized operation gives precise clean output frequencies. The output is available via a type N connector and is selectable as a single range with a bank of seven easily read thumbwheel switches. These switches enable the output frequency, to be dialled or reset to a resolution of 100Hz very quickly. They may be set in any order at any time and with any frequency step from the smallest (100Hz) to the largest (10 to 520MHz). Once set the switches act as the Generator memory and ensure the instrument will always return to this frequency, without subsequent attention after a power interruption. LE.D. lamps provide information regarding the validity of the output frequency. One illuminates when the Synthesizer has locked at the requested frequency and another illuminates if an output higher than 520MHz or lower than 10MHz is dialled. The output level controls are comprehensive with two rotary switches giving a total attenuation range of 119dB in 1dB steps. Dual output scales are provided giving simultaneous indications of voltage pd and dBm (both 50ω). In addition an output meter gives continuous indication of the presence of r.f. output. The meter, in conjunction with an r.f. fine level control enables the main output attenuator to be calibrated and also gives output level control between the 1dB attenuator steps. Full modulation facilities are available with four ranges of f.m. and one of a.m. The a.m. and f.m. controls are completely independent allowing them to be set at any level from either the internal two frequency Oscillator or an external signal. An internal Oscillator output is also provided. The modulation is monitored by a meter and function select switch. This meter indicates the amount of modulation whether it is derived from internal or external sources. A very useful additional feature is the inclusion of a 1kHz automatic distortion meter. This allows the measurement of receiver SI NAD ratios. (The ratio of signal plus noise plus distortion to noise plus distortion). The receiver audio output is automatically level sensed and the 1kHz fundamental removed. The meter then displays the SI NAD ratio in dB. No frequency or level tuning is required. If the remote programme option is fitted then all major functions can be controlled via a multipin socket. These include, frequency, attenuation, modulation and SI NAD meter.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
137
Size:
6.39 Mbytes (6696768 Bytes)
Language:
english
Revision:
1
Manual-ID:
Date:
July 1981
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
25 January 2016
MD5:
a077fa4940ea20846353cea0cca70427
Downloads:
313
Information
SPECIFICATION AND OPERATING INSTRUCTIONS OVERALL SYSTEM DESCRIPTION THE R.F. OSCILLATORS THE FIRST A.L.C. Amplifier AND RANGE OECODER BOARO THE AMPLITUDE MOOULATOR AND A.L.C. OUTPUT Amplifier THE OUTPUT ATTENUATOR THE PRESCALER AND PRESCALER 8UFFER Amplifier THE R.F. BOX EXTERNAL AND INTERNAL WIRING THE RANGE CONTROL AND OUTPUT LEVEL BOARD THE Synthesizer BOARD THE F.M. CORRECTION BOARD THE AUDIO AND SINAO BOARD THE CRYSTAL REFERENCE BOARD THE FRONT AND REAR PANELS THE Power supply AND POWER DISTRIBUTION SYSTEM DISMANTLING INSTRUCTIONS AND SYSTEM FUNCTION LOCATION CALIBRATION PROCEDURES FAULT FINDING OPTIONS, MODIFICATIONS AND ADDENDA PARTS LISTS

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