Mon Jan 04, 2021 11:16 am
#1817914
Our EV97A Eurostar has been emitting ADS-B Out for a couple of years using an unapproved GPS source, via an RS232 connection to a PilotAware Classic unit with external antennae. To accomplish this our 2011 Becker BXP6401 Mode S ES transponder had to be returned to Germany for a hardware and firmware update to enable ADS-B functionality and to transmit SIL and SDA = 0 as required by CAA/LAA. At the time, I was interested in the TN72, but was unable to get a quote from Trig (last Flyer exhibition at Telford) as it didn’t seem to really be on sale at that time.
Now that the CAA rebate scheme is here, can anyone point out any compelling advantage to obtaining a TN72 for our case, i.e. for a Day/ VFR LAA aircraft?
My thoughts are ATC can still see our Mode S, I’m not at all bothered that they might not see our SIL/SDA = 0 ADS-B as I understand most units do not have ADS-B In and no plans for it. If they really wanted to see me they could adjust their receive settings rather than cause me extra expense! The main problem with SIL/ SDA =0 seems to be for reception by ACAS X, but assume that TCAS/ACAS/ ACAS X will still be able to detect our 1090 Mode S transmissions. Bearing in mind that the transponder would presumably have to go off to Germany once again to be adjusted to whatever SIL/SDA the TN72 and compatible antenna would justify, I just can’t see any advantage in changeover of GPS source. Does the panel agree?
Now that the CAA rebate scheme is here, can anyone point out any compelling advantage to obtaining a TN72 for our case, i.e. for a Day/ VFR LAA aircraft?
My thoughts are ATC can still see our Mode S, I’m not at all bothered that they might not see our SIL/SDA = 0 ADS-B as I understand most units do not have ADS-B In and no plans for it. If they really wanted to see me they could adjust their receive settings rather than cause me extra expense! The main problem with SIL/ SDA =0 seems to be for reception by ACAS X, but assume that TCAS/ACAS/ ACAS X will still be able to detect our 1090 Mode S transmissions. Bearing in mind that the transponder would presumably have to go off to Germany once again to be adjusted to whatever SIL/SDA the TN72 and compatible antenna would justify, I just can’t see any advantage in changeover of GPS source. Does the panel agree?