Aselsan AS made several measurements to assess the performance and fidelity of APIC's MicroATx link. The fiber optic link is for the transmission of of broadband, 20 GHz, RF signals to more than a km away. The application space for this link includes remote microwave transmissions, radio telescopes, electronic warfare sensors and radars. The MicroATx is a very high-performance transmitter that includes APIC's ultra-low RIN, high-power laser, very efficient and linear lithium niobate modulator, thermal electric cooler, and low-noise control and power conditioning electronics. This is a tier-1 product that was designed and built to meet high-performance requirements while operating reliably in the harsh environments of Navy tactical aircraft. Thus, these devices were built with expensive, custom, high-quality components.

1. 1/11SST
FIBER LINK TEST RESULTS
of
APIC’s 20 GHz MicroATx-based RFoF Link
An independent assessment by
Aselsan Electronic Industries Inc.
Yenimahalle, Ankara - TURKIYE
SEPTEMBER 2019
FIBER LINK TEST RESULTS

2. 2/11SST
FIBER LINK TEST RESULTS
• TEST SET UP
• GAIN
• Input P1DB
• NF
• OIP3
• OIP2
• SFDR

3. 3/11SST
SETUP
Note: Input of the Fiber link is terminated by 50 ohm load for NF test.
Two signal generators and power combiner are used for OIP3 test.

4. 4/11SST
GAIN
GAIN
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.
New units will be tested using Network Analyzers.
Input Power = -30 dBm

5. 5/11SST
Input P1dB
Note: Input P1dB = -9 dBm for 50MHz
Pin = -30dBm Pout = -23.6dBm Gain= 6.4dB
Pin = -9dBm Pout = -3.6dBm Gain= 5.4 dB
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.
Note: Input P1dB = -8 dBm for 10GHz
Pin = -30dBm Pout = -27.1dBm Gain= 2.9dB
Pin = -8dBm Pout = -6.1dBm Gain= 1.9 dB
Note: Input P1dB = -10 dBm for 17GHz
Pin = -30dBm Pout = -25.5dBm Gain= 4.5dB
Pin = -10dBm Pout = -6.5dBm Gain= 3.5dB

6. 6/11SST
NF @ 1GHz
NF @ 1GHz
Note: RBW=10Hz, VBW=10Hz, Input Att=0; PreAmp=ON
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.
Noise figüre = 5 dB @ 1GHz
-174dBm/Hz + 10log(BW) + Gain = -153 dBm (Gain=6 dB @ 1GHz)

7. 7/11SST
NF @ 10GHz
NF @ 10GHz
Noise figüre = 7 dB @ 10GHz
-174dBm/Hz + 10log(BW) + Gain = -154 dBm (Gain=3 dB @ 10GHz)
Note: RBW=10Hz, VBW=10Hz, Input Att=0; PreAmp=ON
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.

8. 8/11SST
NF @ 17GHz
NF @ 17GHz
Noise figüre = 8.5 dB @ 17GHz
-174dBm/Hz + 10log(BW) + Gain = -154 dBm (Gain=4.5 dB @ 17GHz)
Note: RBW=10Hz, VBW=10Hz, Input Att=0; PreAmp=ON
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.

9. 9/11SST
OIP3 @ 1GHz
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.
OIP3 @1GHz
OIP3=5dBm @ 1GHz

10. 10/11SST
OIP3 @ 10GHz
OIP3 @10GHz
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.
OIP3=3.5dBm @ 10GHz

11. 11/11SST
OIP3 @ 17GHz
OIP3 @17GHz
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.
OIP3=1dBm @ 17GHz

12. 12/11SST
OIP3 - NOTE
OIP3 of the signal analyzer is very high so it does not effect the results.
We have checked the results with the different input attenuation level (10,
20, 30dB) and observed same results.

13. 13/11SST
OIP2
Input
Level
Output
@1GHZ
Output
@2GHZ
Output
@8GHZ
Output
@16GHZ
Output
@12GHZ
Output
@24GHZ
-30 dBm -25 dBm -80 dBm -26 dBm -70 dBm -26 dBm -80 dBm
-25 dBm -20 dBm -70 dBm -21 dBm -60 dBm -21.8 dBm -71.8 dBm
-20 dBm -15dBm -59 dBm -16 dBm -50 dBm -16.8 dBm -62 dBm
-15 dBm -10 dBm -49 dBm -11.6 dBm -41 dBm -12 dBm -53 dBm
OIP2 @ 1GHz = 30dBm
OIP2 @ 8GHz = 18dBm
OIP2 @ 12GHz =28dBm
Note: Input cable (Minibend 12 inch) and output cable (Minibend 16 inch) are not calibrated.

14. 14/11SST
SFDR – 1GHz
Note: No spurs observed , for different span (10kHz, 100kHz, 1MHz, 10MHz, 100MHz, 1GHz, Full SPAN)

15. 15/11SST
SFDR – 10GHz
Note: No spurs observed , for different span (10kHz, 100kHz, 1MHz, 10MHz, 100MHz, 1GHz, Full SPAN)

16. 16/11SST
SFDR – 17GHz
Note: No spurs observed , for different span (10kHz, 100kHz, 1MHz, 10MHz, 100MHz, 1GHz, Full SPAN)