2400BH20 problem

currently, i have 2 links of 2400bh20 on same source and same receiver, but distributed on switch. i have weird experience when the other pair cannot give a stable 2X.

PAIR 1: (downraded to 7.3.6)

Stats for LUID: 2 Test Duration: 2 Pkt Length: 1522
Downlink RATE: 5926144 bps
Uplink RATE: 1499136 bps
Downlink Efficiency: 100 Percent
Max Downlink Index: 100
Actual Downlink Index: 100
Expected Frag Count: 23149
Actual Frag Count: 23149
Uplink Efficiency: 81 Percent
Max Uplink Index: 100
Actual Uplink Index: 81
Expected Frag Count: 5856
Actual Frag Count: 7159


Current Results Stats for LUID: 2 Test Duration: 2 Pkt Length: 1522

Downlink Rate: 9596928 bps (9.60 Mbps)
Uplink Rate: 2832384 bps (2.83 Mbps)
Aggregate Rate: 12429312 bps (12.43 Mbps, 1008 pps)
Pkt Xmt (Act/Exp): 1562/0 (781 pps)
Pkt Rcv (Act/Exp): 454/0 (227 pps)

Downlink Efficiency: 97 Percent
Downlink Index (Act/Max): 97/100
Frag Count (Act/Exp): 38394/37488

Uplink Efficiency: 99 Percent
Uplink Index (Act/Max): 99/100
Frag Count (Act/Exp): 11158/11064

Timing Slave Stats
Session Status :
REGISTERED VC 18 Rate 2X/2X VC 255 Rate 2X/2X
Registered Backhaul :
Power Level :
Actual: -72 dBm Min: -80 dBm Max: -68 dBm
Jitter (Interference Level) :
Actual: 3 Min: 1 Max: 9
Air Delay :
2291 approximately 21.26 miles (112259 feet)

The first pair was formerly 9.5, i tried downgrading to 7.3.6 but still cannot achieve 2x. they got the same alignment. whats your guess?? i can see 2x/2x on its page suddenly turning 2x/1x on few seconds…

do i need to align or replace radios??

1 pair is 2416mhz and other pair is 2457mhz all set to receive synch. it was working 2x/2x about 2 years… anybody who experienced this??

I guess you are running different split ratio. Correct it.
Please alseo use same software version.