GHz Synthesizer Tests Frequency Converter Heads
APG-3.5connector, which is mode-free to 34 Gf lz,' is used up to 4U GHz in the 5356C. The effect of this connector's moiling between 34 and 4 j CHz is taken into account by reducing the specified sensitivity by 5 dB in this region, A special collar was designed for the APC-3.fi connector to strengthen it and to protect it from damage. Waveguide connector WR-28 is also offered, ior customers using only R-band 26.5 to 40 GHz . To test the accuracy of the 5356 5355 system in CW and pulse modes, a...
A new harmonic heterodyne frequency converter plugin adds automatic GHz
by Richard F. Schneider, Ronald E. Felsenstein, and Robert W. Offermann O BE USEFUL in the widest possible range of applications. a microwave counter should be capable of measuring the carrier frequencies of pulsed or CW signals, and for pulsed signals, should also provide for liine interval or frequency measurement of the pulse modulation. The design should be optimized with wide IF band-widths for narrow pulses and wide KM deviations, and should have high sensitivity. Cost-effective frequency...
All Automatic Microwave Frequency Counter Test System to GHz
Testing the 5343A Microwave Frequency Counter, trie 5355A Automatic Frequency Converter and the 5356A.B.'C Frequency Converter Heads for conformity to alt ot their specifications over their entire frequency ranges is not a trivial task To handle this formidable job a special automatic test system had to be devised Some of its features are 1 The software programs are structured to allow the operator to run a full set ot tests automatically without operator assistance , to select a single test to...
A tolMHz Prescaler
Behind the 04-to-1 6-GHz input on the front panel oi the 5355A Automatic Frequency Converter is a prescaler thai divides the input frequency Dy eight to bring it within the range ot the 5345A Counter mainframe The prescaler operates in both the CW and pulsed RF modes. An arming circuit senses marginal signals to keep the counter from miscounting. The prescaler input'S protected by a fuse that is accessible from the front panel Fig 1 is a block diagram of the prescaler Theiateststate-of-the-art...
A new sampler provides higher frequency coverage and dB greater sensitivity
DIRECT-COUNTING FREQUENCY COUNTERS are restricted by the speed of today's logic circuitry to maximum frequencies of 500 MHz or so. Consequently. automatic microwave counters must employ some method of down-conversion to extend counting into the gigahertz rango. Traditional techniques, such as he transfer oscillator and heterodyne techniques, were supplemented by he harmonic heterodyne technique with the introduction of the HP 5342A in the spring of 1978.1 The advent of the microprocessor made...