The Venus VLB 948 C-band LNBF has been approved by DGPT in June 2010, The type approval certificates has been issue in June 15th 2010.  The VLB 948 C-band LNBF was included in Satellite receiver category. The specification for the device as below:
Specification of Venus VLB 948 C-Band LNBF  :

Venus VLB 948 C-Band LNBF

• Input Frequency : 3.4 ~ 4.2 GHz
• L.O Frequency : 5.150 Ghz ±1 Mhz
• Output Frequency : 950 ~ 1750 Mhz
• Noise Figure : 17° k
• Stability : ± 2 Mhz ( -40° C ~ +70° C )
• L.O phase noise :
  • -55 dBc / Hz @ 1 KHz
  • -85dBc /Hz @ 10 KHz
  • -105 dBc / Hz @ 100 KHz
• Conversion Gain 65 dB ( TYP )
• Gain Flatness ± 0.5 dB / 36 Mhz
• Input : V.S.W.R 2.5:1
• Output : V.S.W.R 2.5:1
• Local Leakage at input -45 dBm
• Image Rejection 50 dB
• Output Power + 5 dBm ( AT 1 dB Compression )
• Cross Polar Isolation 23 dB Min
• DC Supply Voltage 11-14.5 V 15.5-22 V ( H )
• Operating Temperature : -40° C ~ +70° C
• Relative Humidity 0% ~ 95%
• IF Output Connector “F” Type Female
• Output Impedance 75 ?hms

To be sure that the Venus VLB 948 C-Band LNBF is own type approval certificate in Indonesia. The legal of certificate holder is PT.Subur Semesta.