KDI/Triangle Pin Diode attenuators continuously change the amplitude of a microwave signal by applying a varying DC current, voltage, or digital signal, depending upon the Model type selected. The basic current controlled models do not have thermal compensation included, the voltage controlled & digital models have linearization and/or temperature compensation options. A matched configuration of diodes keeps the VSWR low through all values of attenuation and frequency. Linearization is provided in some models, which produces an output signal that is linearly proportional to the control voltage. Temperature compensation is also provided in some models, over either the to +85 degree C range, 10�40 degree C range, or 0-70 degree C range depending upon the Model type selected. Digitally controlled analog attenuators, Model series "GA", require an TTL binary logic input. Standard units in the GA series have an 8 bit input producing 256 discrete values of attenuation. Optional 10�12 bit logic is readily available simply by specifying in the model number with a dash number.
10 K ohms, 20 pf. Standard models can be changed from any value of attenuation to any other value in 10 microsec. Units can be provided with switching speed to 300 nanosec. on request. Speed is related to maximum attenuation required. That is, 32 dB models are faster than 64 dB models. Insertion Loss will increase by a factor 1.6 on higher speed models. SMA standard, others on request.
R.F. Power: To prevent self-biasing, the attenuators should be operated at less than 100 mW CW, and 60 watts peak. Units will not be damaged by application of 1 watt or 100 watts peak. 50 OHMS. +10 mA, maximum attenuation. 0 mA, zero attenuation for all current controlled models. �15 volts �50 mA maximum. For all models. 2GT, GA (except GT) 0�10 volts produces 0�32 dB for 32 dB models and 0�64 dB for 64 dB models. Other values of control voltage can be provided on request. 10 VDCBIAS CURRENT (mA) Typical curve of attenuation vs. bias current for GT Models.
Model No.* GT-( 1-GT-( 2-GT-( GA-( ) GA-( )TT GA-( TR ) )TT )TR ) )TT )TR Input Control Current VOLTAGE TO 40C VOLTAGE-TEMP COMP TO +85C VOLTAGE-TEMP COMP TO 70C VOLTAGE- LINEARIZED TO 40C VOLTAGE-LINEARIZED TEMP COMP TO +85C VOLTAGE-LINEARIZED TEMP COMP TO 70C DIGITAL-TTL TO 40C DIGITAL-TTL- TEMP COMP +85 C DIGITAL-TTL-TEMP COMP 70 C Accuracy Chart No. C D Input Control 0�10MA 0�10VDC TTL Input Fixed None @50 MA MAX @50 MA MAX @50 MA MAX @50 MA MAX @50 MA MAX @50 MA MAX @50 MA MAX @50 MA MAX @50 MA MAX
60 South Jefferson Road, Whippany, NJ 07981 Tel: 973-887-8100 Fax: 973-884-0445 email: email@example.com See us on the web @ www.mcekdi-integrated.comNO. OF BITS = 8 L.S.B. =.25 dB ATTENUATION: 63.75 dB BIT SIZE LOGIC = REF. (INS. LOSS) 63.75 dB
TEMPERATURE COMPENSATED DIGITALLY CONTROLLED ANALOG PIN DIODE ATTENUATORS SERIES GA-TT/TR
**Select type by adding to Model No. (1) Subtract 0.5 dB from insertion loss for GT and 1 GT Series
60 South Jefferson Road, Whippany, NJ 07981 Tel: 973-887-8100 Fax: 973-884-0445 E-Mail: firstname.lastname@example.org See us on the web @ www.kditriangle.com
1. Harmonic Distortion: Approximately �50 dBc for Pin 0 dBm at a frequency of 1.0 GHz for most units. This value improves by approximately 10 dB per octave as the frequency increases; however, since this value is dependent on bandwidth of the unit, power input, and switching speed required, the factory should be consulted if harmonic content is an important system requirement. 2. Two/Tone Intermodulation Products: Second and third order products approximately 50 dBC for Pin 0 dBm (each signal) at all attenuation settings. If a narrow frequency bandwidth is required, KDI/Triangle can supply a unit that is electrically optimized for that bandwidth. Mechanical dimensions will remain the same as the standard unit, and the price will generally be lower. Specify the frequency range when ordering a narrow bandwidth model, and a special part number will be assigned. 4. Add dB to all accuracy numbers for types (50) and (51). Two RF connectors are in line. 5. Attenuation vs. temperature only � 0.02 dB/�C typical. (At 64 dB) 6. When ordering, add suffix indicating required temperature compensation range to the model number, i.e. the 1-GT-32-T, compensated over the temperature range to +85�C, would be ordered 1-GT-32-TT. If compensation from +70�C is required, the model number would be 1-GT32-TR. (See "attenuation accuracy vs frequency and temperature" tables for specifications.) 7. Monotonicity guaranteed for all models.
over the to +40�C temperature range SERIES GA, GT, 1GT, 2GT Octave Models (2:1 Frequency) 64 dB [See note (4)] Greater than Octave Models 64 dB
over the to +70�C temperature range SERIES GA-(TR) 1,2-GT-(TR) Octave Models (2:1 Frequency) 64 dB Greater than Octave Models 64 dB
over the to +85�C temperature range SERIES GA-(TT), 1, 2GT(TT) Octave Models (2:1 Frequency) 64 dB Greater than Octave Models 64 dB
[See note (4)] Attentuation accuracy given above assumes 0.1% regulation of power supply voltages *Add or R suffix (see temperature information).TYPICAL CURVE OF ATTENUATION VS. CONTROL VOLTAGE FOR 2GT MODELS
64 60 BEST FIT STRAIGHT LINE 1 5 CONTROL VOLTAGE (V) 0.5 dB BEST FIT STRAIGHT LINE (dB) 30
[See note (4)] Attentuation accuracy given above assumes 0.1% regulation of power supply voltages