Certificate No. 3875

Loop Test Translators

S, C, X, Ku & DBS Bands

  • S, C, X, Ku & DBS Bands
  • Simulates Satellite Link
  • High Stability
  • Low Phase Noise
  • Gain Adjustment
  • Reference Output
  • 1U Rack Height
  • Custom Options

The ALT series of Loop Test Translators are designed to replace the satellite link for test and alignment of earth station systems operating in S, C, X, Ku or DBS frequency bands. Incorporating fundamental frequency phase locked oscillators and double balanced mixers, the translators block convert frequencies from uplink to either downlink or L-band for instantaneous monitoring of frequency, power levels and modulation. The input path contains a front panel controlled continuously variable attenuator for reducing input power levels. Each unit also provides a reference frequency output and LO lock alarm.

 General Specifications
 Maximum Input Level
 +10dBm
 Conversion Gain
 -20dB nom.
 Conversion Flatness
 +/-2dB typ.
+/-0.5dB/40MHz max.
 Attenuation Range
 30dB min.
 Impedance
 50 ohms
 Input VSWR
 1.8:1 typ.
 Output VSWR
 1.8:1 typ.
 LO Frequency Stability +/-5ppm max. over 0+50C
+/-2ppm typ. over +10+40C
+/-2ppm/day max.
 Internal Reference 25 or 50MHz standard
 Reference Output As internal reference
 Signal Related Spurious -50dBc typ.
 LO Related Spurious -50dBm typ.
 Input Power 80-240V, 50-60Hz
 Input Power Connector IEC with fuse
 Operating Temperature 0+50C
 Storage Temperature -40+85C
 Attenuation Control 10 turn with dial, front panel
 Lock Alarm LED, front panel
 RF Input Connector SMA female, rear panel
 RF Output Connector SMA female, rear panel
 Ref. Monitor Connector SMA female, rear panel
 Size 19" x 1U x 13.5" (343mm) incl. connectors & protrusions

Phase Noise (dBc/Hz) (typical)
Offset Frequency (Hz) LO Frequency (MHz)
650 1750 3050 5100 7400 13050
100 -80 -73 -65 -60 -56 -53
1K -115 -105 -100 -92 -90 -85
10K -130 -125 -115 -105 -100 -95
100K -135 -125 -115 -112 -110 -105
1M -140 -140 -135 -125 -120 -115

Model No Translation
Bands		 Input
Freq. Range
(MHz)		 Ouput
Freq. Range
(MHz)		 LO
Frequency
(MHz)
ALT-0175-S S-S 2025-2125 2200-2300 175
ALT-1075-S S-L 2025-2125 950-1050 1075
ALT-2225C C-C 5845-6425 3620-4200 2225
ALT-4975-C C-L 5925-6425 950-1450 4975
ALT-7375-CI C-L(inv) 5925-6425 1450-950 7375
ALT-0650-X X-X 7900-8400 7250-7750 650
ALT-6950-X X-L 7900-8400 950-1450 6950
ALT-1800-Ku Ku-Ku 12750-13250 10950-11450 1800
ALT-2050-Ku Ku-Ku 12750-13250 10700-11200 2050
ALT-11800-Ku Ku-L 12750-13250 950-1450 11800
ALT-1750-KuE KuE-Ku 13750-14500 12000-12750 1750
ALT-2300-KuE KuE-Ku 13750-14500 11450-12200 2300
ALT-2800-KuE KuE-Ku 13750-14500 10950-11700 2800
ALT-3050-KuE KuE-Ku 13750-14500 10700-11450 3050
ALT-12800-KuE KuE-L 13750-14500 950-1700 12800
ALT-1750-Ku Ku-Ku 14000-14500 12250-12750 1750
ALT-2300-Ku Ku-Ku 14000-14500 11700-12200 2300
ALT-2550-Ku Ku-Ku 14000-14500 11450-11950 2550
ALT-3050-Ku Ku-Ku 14000-14500 10950-11450 3050
ALT-13050-Ku Ku-L 14000-14500 950-1450 13050
ALT-5100-DBS DBS-DBS 17300-17800 12200-12700 5100
ALT-5178-DBS DBS-DBS 17300-17800 12122-12622 5178
ALT-5600-DBS-A DBS-DBS 17300-17800 11700-12200 5600
ALT-5600-DBS-B DBS-DBS 17300-18100 11700-12500 5600
ALT-5600-DBS-C DBS-DBS 17800-18100 12200-12500 5600
ALT-7400-DBS DBS-DBS 18100-18400 10700-11000 7400
ALT-16350-DBS-A DBS-L 17300-17800 950-1450 16350
ALT-16350-DBS-B DBS-L 17300-18100 950-1750 16350
ALT-16350-DBS-F DBS-L 17300-18400 950-2050 16350
ALT-16850-DBS DBS-L 17800-18100 950-1250 16850
ALT-17150-DBS DBS-L 18100-18400 950-1250 17150

Options:

  • -00 Standard
  • -01 10MHz Int. Ref.
  • -02 50MHz Ext. Ref
  • -03 10MHz Ext. Ref.
  • -04 OCXO Int. Ref.
  • -11 Switched Ext. LO

 

  • -12 Exclusive Ext.LO
  • -21 0dB Conv. Gain
  • -31 Step Atten. 69dB
  • -41 N female input
  • -42 N female output

Custom Options:

  • Multi Band Units
  • Filtered Output
  • Modular Construction
  • Portable Units
  • Outdoor Units


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