model 115a thru 119a dc to 18.0 ghz manual step attenuators 2 watt choice of type n, gpc-7, tnc, sma connector features ! safety mechanical stop - a mechanical stop between maximum and 0 attenuation positions on all models prevents damage to the mechanical drive as well as preventing large power changes that could cause dam- age to sensitive equipment. ! choice of attenuation ranges - five standard atten- uation ranges are available: 0-9 db, 0-69 db, and 0-99 db in 1 db steps, and 0-60 db and 0-90 db in 10 db steps. ! broadband - all models are available in a choice of 3 frequency ranges: dc-4, dc-12.4, and dc-18 ghz (dc-16 for units with tnc connector). ! right-angle drive - the center conductor of the con- nector is perpendicular to the control shaft, offering greater flexibility of applications: panel mounting or bench setup. all models are bidirectional. ! custom configurations available upon request. ! low deviation from nominal value - these mini step attenuators have flat frequency response over speci- fied bands and excellent attenuation accuracy. deviation from nominal value is low at all settings. ! excellent repeatability and long life switch - repeatability is better than 0.05 db to 18.0 ghz for over 1,000,000 switchings of the drum. description the weinschel corporation models 115a through 119a are a series of broadband, step attenuators in a right-angle drive configuration, where the center conductor of the con- nector is perpendicular to the control shaft. they feature excellent performance characteristics suitable for use in high reliability 50 ohm systems and applications requiring extra-small components for the precision control of power in discrete steps. they can be used either as input or output attenuators in signal sources, receivers, field strength meters, spectrum analyzers, etc. specifications nominal impedance: 50 ? frequency range (add model no. prefix to designate range): all models: dc to 4.0 ghz (ac) dc to 12.4 ghz (ae) dc to 18.0 ghz (af)* *dc to 16.0 ghz for tnc connector standard incremental attenuation range: model 115a: 0 to 9 db in 1 db steps model 116a: 0 to 60 db in 10 db steps model 117a: 0 to 69 db in 1 db steps model 118a: 0 to 90 db in 10 db steps model 119a: 0 to 99 db in 1 db steps maximum swr (models 117a & 119a): frequency sma, n range (ghz) gpc-7 tnc dc - 4 1.35 1.35 dc - 12.4 1.55 1.55 dc - 18 1.70 1.70 power rating: 2 watts average to 25c ambient temperature, derated linearly to 1 watt @ 54c. 200 watts peak (5 sec pulse width; 0.5% duty cycle) power coefficient: < 0.005/db/db/watt temperature coefficient: < 0.0004/db/db/c temperature range: operating: 0c to +54c nonoperating: -54c to +54c incremental phase shift: ~0.5 per db x f(ghz) repeatability: better than 0.05 db across frequency band for switch life. switch life: over 1,000,000 steps indexing : 36 maximum swr (models 115a, 116a, & 118a): frequency sma, n range (ghz) gpc-7 tnc dc - 4 1.25 1.30 dc - 12.4 1.50 1.50 dc - 18 1.60 1.60 weinschel 5305 spectrum drive, frederick, md 21703-7362 ! tel: 301-846-9222, 800-638-2048 ! fax: 301-846-9116 web: www.weinschel.com ! email: sales@weinschel.com corporation 119 5/25/99
calibration: insertion loss data is supplied as follows. other test data can be supplied at additional cost. dc to 4 ghz: at 50 mhz and 4 ghz dc to 12.4 ghz: at 50 mhz, 4, 8 and 12 ghz dc to 18 ghz: at 50 mhz, 4, 8, 12 and 18 ghz* *dc-16.0 ghz with tnc units. relative humidity: 95% altitude: to 10,000 ft. shock (non-operating) : 8 g's, 100 ms, 1/2 sine drum configurations: single drum: 115a, 116a, 118a dual drum: 117a, 119a vibration (non-operating): 5 to 8 cps, 0.20 inch double amplitude 8 to 15 cps, 0.10 inch double amplitude 15 to 55 cps, 0.36 inch double amplitude supported rigidly front and back shaft rotation: clockwise for increasing attenuation construction: materials: housing: aluminum alloy, clear irridite, mil-c-5541. dust cover: painted aluminum alloy drum: aluminum alloy shaft: passivated stainless steel connector: stainless steel and beryllium copper contacts. connector : sma connector per mil-std-348 interface dimensions - mate nondestructively with mil-c-39012 con- nector. front and rear sma connector available in either standard or right-angle configuration, connector sex is optional as follows: connector options type/description 1 sma, female 2 sma, male 3 type n, female 4 type n, male 5 gpc 7 6 tnc, female 7 tnc, male incremental insertion loss (+ db): model db frequency range (ghz) number range dc-4 dc-12.4 dc-18* 115a 1-9 0.3 0.3 0.5 117a 1-9 0.3 0.3 0.5 10-19 0.7 0.8 1.0 20-29 0.9 1.0 1.2 30-39 1.0 1.2 1.4 40-49 1.1 1.3 1.5 50-59 1.2 1.6 1.7 60-69 1.3 1.8 1.9 119a 1-9 0.3 0.3 0.5 10-19 0.7 0.8 1.0 20-29 0.9 1.0 1.2 30-39 1.0 1.2 1.4 40-49 1.1 1.3 1.5 50-59 1.2 1.6 1.7 60-69 1.3 1.8 1.9 70-79 1.4 2.0 2.1 80-89 1.5 2.2 2.3 90-99 1.6 2.4 2.5 116a 10 0.3 0.5 1.0 20 0.3 0.5 1.0 30 0.4 0.6 1.0 40 0.5 0.8 1.2 50 0.7 1.0 1.5 60 0.8 1.2 1.8 118a 10 0.3 0.5 1.0 20 0.3 0.5 1.0 30 0.4 0.6 1.0 40 0.5 0.8 1.2 50 0.7 1.0 1.5 60 0.8 1.2 1.8 70 0.9 1.4 2.1 80 1.0 1.6 2.3 90 1.2 1.8 2.5 *dc to 16.0 ghz for tnc connector maximum insertion loss (db): model conn frequency range (ghz) number type dc-4 4-8 8-12.4 dc-18* 115a n/gpc7 0.3 0.4 0.5 0.7 sma/tnc 0.3 0.5 0.7 1.0 116a n/gpc7 0.3 0.4 0.5 0.7 sma/tnc 0.4 0.5 0.7 1.0 117a n/gpc7 0.5 0.7 0.9 1.2 sma/tnc 0.6 0.8 1.0 1.5 118a n/gpc7 0.4 0.5 0.6 0.8 sma/tnc 0.5 0.6 0.7 1.0 119a n/gpc7 0.5 0.7 0.9 1.2 sma/tnc 0.6 0.8 1.0 1.5 *dc-16.0 ghz for tnc connector weight: 115a 340 g (12 oz) 116a 340 g (12 oz) 117a 760 g (27 oz) 118a 450 g (16 oz) 119a 880 g (31 oz) model number description: example: ac1 16a - xx -xx basic model number maximum attenuation value (db) connector options* 1st digit is j1 side (front) 2nd digit is j2 side (rear) frequency range (ghz) specifications (con?t): weinschel 5305 spectrum drive, frederick, md 21703-7362 ! tel: 301-846-9222, 800-638-2048 ! fax: 301-846-9116 web: www.weinschel.com ! email: sales@weinschel.com corporation 120 5/25/99
physical dimensions: model no. dim a dim b 119a 58.7 (2.31) 111.3 (4.38) 118a 29.0 (1.14) 57.7 (2.27) 117a 54.0 (2.11) 101.1 (3.98) 116a 23.9 (0.94) 47.5 (1.87) 115a 23.9 (0.94) 47.5 (1.87) conn type dim c tnc, male 35.0 (1.38) tnc, female 38.1 (1.50) gpc-7 21.0 (0.83) type n, male 20.6 (0.81) type n, female 18.3 (0.72) sma, male 9.4 (0.37) sma, female 7.9 (0.31) note: all dimensions are given in mm (inches) and are maximum, unless otherwise specified. weinschel 5305 spectrum drive, frederick, md 21703-7362 ! tel: 301-846-9222, 800-638-2048 ! fax: 301-846-9116 web: www.weinschel.com ! email: sales@weinschel.com corporation 121 11/1/99
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