Equipment and Components for the RF and Microwave industry

Loop Test Translators
Reversible Signal Path

  • Ka and Ku Bands
  • Synthesised LO
  • Reversible Operation
  • Asymmetric Transfer Function
  • Patent Pending
  • Local and Remote Ethernet Control
  • Extremely Versatile
  • Standard and Custom Options

LO Phase Noise (dBc/Hz) typical
Offset Frequency (Hz) LO Frequency (GHz)
2.0 10.0 12.0 27.0
100 -80 -70 -65 -60
1K -90 -85 -75 -70
10K -95 -90 -80 -75
100K -95 -90 -80 -80
1M -120 -115 -115 -110

The PRT series of Ka and Ku Band Loop Test Translators feature technology to achieve reversible operation with the ability to introduce different transfer characteristics in the forward and reverse paths.

In this way, one LTT instrument can be used in a variety of test applications for frequency conversions from Uplink (Tx) to Downlink (Rx) or to L-Band and from L-Band to Downlink (Rx).

Forward and reverse paths may have different values of Conversion Gain, Attenuation Range, Filtering Characteristics and LO Frequency. Instruments are essentially customised for the desired applications parameters.

 General Specifications
 Maximum Input Level +10dBm
 Conversion Gain Flatness +/-2dB typ.
+/-0.5dB/40MHz max.
 Impedance 50 ohms
 Input VSWR 1.3:1 typ.
 Output VSWR 1.3:1 typ.
 Signal Related Spurious -25dBc typ.
 LO Related Spurious & Harmonics -30dBm typ.
 Non Signal or LO Related Spurious -60dBc min.
 Input Power 80-240V, 50-60Hz
 Input Power Connector IEC with Fuse
 Operating Temperature 0 to +50C (see options)
 Storage Temperature -10 to +70C
 Lock Alarm LED, Front Panel & Ethernet
 Input connector (see options) 2.92mm Female Ka Band
SMA Female Ku Band
 Output Connector SMA Female
 Reference Input Connector BNC Female
 Ethernet Connector RJ45
 Size 19" x 2U x 13.5" (343mm)
incl. connectors & protrusions

Typical Configurations

Model No Direction Input Frequency Range
Output Frequency Range
LO Frequency Range
PRT-Ka-1001 Forward Path 27.5-31.50 0.95-1.70 26.55-29.80
  Reverse Path 0.95-1.70 17.70-21.20 16.75-19.50
PRT-Ku-1002 Forward Path 12.75-14.50 0.95-1.70 11.80-13.05
  Reverse Path 0.95-1.70 10.70-12.75 9.75-11.05

For a specific frequency plan, please advise the required input and output frequency ranges for each path.

We reserve the right to change standard product specifications without notice but will be pleased to consider control drawings for quotation.

T: +44 (0)1376 550220 F: +44 (0)1376 552145 E: 40A Springwood Drive, Braintree, Essex CM7 2YN, England